Road & Bridge Design Publications · 2019-10-29 · Road & Bridge Design Publications Monthly...

Road & Bridge Design Publications

Monthly Update – October 2019

1

Revisions for the month of October are listed and displayed below and will be included in projects submitted for the February letting, except as specified below. E-mail road related questions on these changes to [email protected]. E-mail bridge related questions to [email protected].

Special Details

R-67-G: Guardrail Anchorage Bridge, Details: Added details for bolt locations in the thrie beam terminal connectors when attaching them to the bridge railing concrete block retrofit in anchorages M-1 through M-6. (One bolt location deviates from the standard pattern.) Also, added “concrete block retrofit” to the bolt requirements table on sheet 16 and to the list of bridge barrier types which guardrail may connect to on anchorage details M1 through M6.

B-22-E & B-23-F: Bridge Railing Thrie Beam Retrofit: Updated details with new guardrail approach sections, Detail A3 (Guardrail Type MGS-8), A4 (Guardrail Type T) and A5 (Guardrail Type B). Note: This detail will be effective for projects beginning with the mid-January 2020 letting.

Road Design Manual

6.03.09A1a: Mixture Selection: Eliminated the CPM exception for the use of mainline super pave mix.

6.06.08: Bridge Approach Curb & Gutter: Revised section to include the new approach curb & gutter details and requirements for their use.

7.01.16: Guardrail Attachments to Bridges and Walls: Revised the section to make the “M” and “A” anchorages the standard for new installations, along with providing a description for their current use.

Bridge Design Manual

7.03.09 A.12(LFD) & 7.03.09 A.13(LRFD): Added note for the design of piles regarding load types.

7.03.13 G. (LFD & LRFD): Added note for the design of drilled shafts regarding load types.

Road & Bridge Design Publications

Monthly Update – October 2019

2

Updates to MDOT Cell Library, Bridge Auto Draw Program, etc., may be required in tandem with some of this month's updates. Until such updates to automated tools can be made, it is the designer's/detailer's responsibility to manually incorporate any necessary revisions to notes and plan details to reflect these revisions.

Index to Special Details 10-28-2019

SPECIAL DETAIL

NUMBER

NUMBER OF

SHEETS TITLE CURRENT

DATE

21 2 GUARDRAIL AT INTERSECTIONS 4-9-18

24 8 GUARDRAIL ANCHORED IN BACKSLOPE TYPES 4B, 4T, & 4MGS-8 9-28-18

99 2 CHAIN LINK FENCE WITH WIRE ROPE 9-22-14

R-1-G 9 DRAINAGE STRUCTURES 6-15-16

R-15-G 3 COVER K 7-26-19

R-22-F 4 COVER V 8-6-18

R-23-E 3 COVER W 8-6-18

R-24-F 3 COVER VG 8-6-18

R-27-F 1 BRIDGE APPROACH CURB & GUTTER (USING EXISTING CATCH BASIN) 10-14-19

R-28-J 7 SIDEWALK RAMP AND DETECTABLE WARNING DETAILS 7-26-19

R-32-F 8 APPROACH CURB & GUTTER DOWNSPOUTS 10-14-19

R-33-G 2 CONCRETE VALLEY GUTTER AND URBAN FREEWAY CURB 8-14-19

R-35-E 2 CONCRETE SHOULDER GUTTER AND SPILLWAY 7-30-18

R-45-J 2 PAVEMENT REINFORCEMENT FOR BRIDGE APPROACH 6-25-18

R-53-A 22 TEMPORARY CONCRETE BARRIER LIMITED DEFLECTION 8-14-15

R-56-F 6 GUARDRAIL MEDIAN OBJECT PROTECTION 2-5-19

R-60-J 17 GUARDRAIL TYPES A, B, BD, T, TD, MGS-8, & MGS-8D 2-27-19

R-62-H 4 GUARDRAIL APPROACH TERMINAL TYPE 2M 5-1-18

R-63-C 16 GUARDRAIL APPROACH TERMINAL TYPES 3B & 3T 2-5-19

R-66-E 4 GUARDRAIL DEPARTING TERMINAL TYPES B, T, & MGS 9-28-18

*R-67-G 20 GUARDRAIL ANCHORAGE, BRIDGE, DETAILS 10-24-19

R-72-D 11 W-BEAM BACKED GUARDRAIL & GUARDRAIL LONG SPAN INSTALLATIONS 2-7-19

R-73-F 3 GUARDRAIL OVER BOX OR SLAB CULVERTS 8-1-19

R-84-A 1 BOX CULVERT JOINT TIE ASSEMBLIES 2-19-19

R-86-F 2 PRECAST CONCRETE END SECTION FOR PIPE CULVERT 9-13-18

R-95-G 7 CULVERT SLOPED END SECTIONS 9-19-18

R-126-I 5 PLACEMENT OF TEMPORARY CONCRETE & STEEL BARRIER 8-25-15

R-127-G 8 DELINEATOR INSTALLATIONS 3-4-19

* Denotes New or Revised Special Detail to be included in projects for (beginning with) the February letting.

Note: Former Standard Plans IV-87, IV-89, IV-90, and IV-91 Series, used for building cast-in-place concrete head walls for elliptical and circular pipe culverts, are now being replaced with plans that detail each specific size. The Special Structures Unit will provide these full-sized special details for inclusion in construction plans for MDOT jobs. To assure prompt delivery, requests must be made in advance.

Former Standard Plans IV-93 and IV-94 series have been replaced with precast concrete box & three-sided culverts as per the 2012 Standard Specifications for Construction.

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Index to Bridge Detail Sheets 10-28-2019

DETAIL NUMBER

NUMBEROF

SHEETS TITLE CURRENT

DATE

*B-22-E 5 BRIDGE RAILING, THRIE BEAM RETROFIT (R4 TYPE RAILING) 10-23-19

*B-23-F 6 BRIDGE RAILING, THRIE BEAM RETROFIT (OPEN PARAPET RAILING) 10-23-19

B-26-F 8 BRIDGE RAILING, 4 TUBE 5-22-18

B-28-A 7 BRIDGE BARRIER RAILING, TYPE 7 9-27-19

B-29-A 8 BRIDGE BARRIER RAILING, TYPE 6 9-27-19

B-50-A 3 BRIDGE RAILING, CONCRETE BLOCK RETROFIT 10-15-19

B-101-G 2 DRAIN CASTING ASSEMBLEY DETAILS 7-26-18

EJ3AC 1 to 3 EXPANSION JOINT DETAILS 10-8-19

EJ4P 1 to 3 EXPANSION JOINT DETAILS 10-8-19

PC-1M 1 PRESTRESSED CONCRETE I-BEAM DETAILS 8-23-17

PC-2H 1 70" PRESTRESSED CONCRETE I-BEAM DETAILS 8-23-17

PC-4F 1 PRESTRESSED CONCRETE 1800 BEAM DETAILS 8-23-17

* Denotes New or Revised Special Detail to be included in projects for (beginning with) the Mid-January letting.

Note: Details EJ3AC & EJ4P are interactive, i.e. designers and detailers choose details based upon railing type and angle of crossing. Place all details appropriate for the project, structure specific information, and the Expansion Joint Device quantity on the sheet. The sheet shall then be added to the plans as a normal plan sheet.

Detail PC-1M, PC-2H and PC-4F shall have structure specific information and quantities added to the sheet. The sheet shall then be added to the plans as a normal plan sheet.

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DEPARTMENT DIRECTOR MICHIGAN DEPARTMENT OF TRANSPORTATION

OF

SHEET

PLAN DATEF.H.W.A. APPROVALCHECKED BY:

DRAWN BY:

Michigan Department of Transportation

BUREAU OF DEVELOPMENT STANDARD PLAN FOR

APPROVED BY:

APPROVED BY:

Paul C. Ajegba

BY

PREPARED

DESIGN DIVISION

DIRECTOR, BUREAU OF FIELD SERVICES

DIRECTOR, BUREAU OF DEVELOPMENT 1

BRIDGE, DETAILS

GUARDRAIL ANCHORAGE,

R-67-G

RAILING

BRIDGE BARRIER

E3 JOINT

PO

ST 6

PO

ST 5

PO

ST 4

PO

ST 3

PO

ST 2

PO

ST 1

PLAN VIEW

15"

(4 SPACES) (3 SPACES)

3'-1•" POST SPACING

25'-0"

10'-7•"

POST SPACING

6'-3"

3'-6" POST SPACING

1'-6ƒ"

ELEVATION VIEW

THRIE BEAM EXPANSION SECTION

BRIDGE BARRIER RAILING

THRIE BEAM TERMINAL CONNECTOR

34"

15"


3'-1•" POST SPACING 6'-3" POST SPACING

(2 SPACES)

3'-6" POST SPACING

1'-6ƒ"

10'-7•"

34"

28"33"

THRIE BEAM EXPANSION SECTIONTHRIE BEAM TERMINAL CONNECTOR

BRIDGE BARRIER RAILING

ELEVATION VIEW

(TO BE USED WITH GUARDRAIL, TYPE B)

(WITHOUT EXPANSION AT BACKWALL)

6'-3" TYPICAL POST SPACING

GUARDRAIL, TYPE T

GUARDRAIL, TYPE MGS-8 *

INFORMATION)

FOR TYPE MGS-8 GUARDRAIL HEIGHT

(SEE STANDARD PLAN R-60-SERIES

34" TYPE T

(TO BE USED WITH GUARDRAIL, TYPE T & TYPE MGS-8)

AESTHETIC PARAPET TUBE, OR 3 TUBE WITH PICKETS

BRIDGE BARRIER RAILINGS, TYPE 4, 2-TUBE, 4-TUBE,

DETAILS FOR CONNECTING GUARDRAIL TO


GUARDRAIL, TYPE B

31'-3"

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

6'-3"25'-0"

10-24-2019

20

10 GAUGE

THRIE BEAM SECTIONS

10 GAUGE

THRIE BEAM SECTIONS

GUARDRAIL ANCHORAGE, BRIDGE, DETAIL T1 (SEE NOTES, SHEET 20)

ANCHORAGE, BRIDGE DETAILS T1, T4 & T6

FROM GUARDRAIL, TYPE MGS-8 TO GUARDRAIL

SPACING AND GUARDRAIL LAYOUT TO TRANSITION

* SEE STANDARD PLAN R-60-SERIES FOR POST


B.L.T.

W.K.P.

MICHIGAN DEPARTMENT OF TRANSPORTATION

OF

SHEET

PLAN DATEF.H.W.A. APPROVAL


BRIDGE, DETAILS


R-67-G

PO

ST 1

PO

ST 2

PO

ST 3

PO

ST 4

PO

ST 5

PO

ST 6

RAILING, TYPE 5

BRIDGE BARRIER

PLAN VIEW

E3 JOINT


3'-1•" POST SPACING3'-6" POST SPACING

1'-6ƒ"

15"

ELEVATION VIEW

SPECIAL END SHOE

BRIDGE BARRIER RAILING, TYPE 5

30"

(WITHOUT EXPANSION AT BACKWALL)

DETAILS FOR CONNECTING GUARDRAIL TO BRIDGE BARRIER RAILINGS, TYPE 5


ELEVATION VIEW

33"

34"


SPECIAL END SHOE

30"


3'-1•" POST SPACING 6'-3" POST SPACING

(2 SPACES)


37'-6"

3'-6" POST SPACING

1'-6ƒ"

15"

28"


GUARDRAIL, TYPE T

GUARDRAIL, TYPE B


INFORMATION)



34" TYPE T


10-24-2019


25'-0"

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

6'-3"

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

6'-3"

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

6'-3" 12'-6"

18'-9"

2 20

10 GAUGE

THRIE BEAM SECTION

10 GAUGE

THRIE BEAM SECTIONS



(SEE NOTES, SHEET 20)

GUARDRAIL ANCHORAGE, BRIDGE, DETAIL T4






OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

PO

ST 1

PO

ST 2

PO

ST 3

PO

ST 4

PO

ST 5

PO

ST

6

RAILING, TYPE 4

BRIDGE BARRIER

PLAN VIEW

E3 JOINTEXPANSION JOINT

BRIDGE

(WITH EXPANSION AT BACKWALL)


ELEVATION VIEW


34"



34"

32"

16"


3'- 1•" POST SPACING

MAX (2 SPACES)

6'-3" POST SPACING


43'-9"

7'-10•" 6'-3" 12'-6"

3'-6"

MIN.

POST SPACING

1'-6ƒ"

ELEVATION VIEW

THRIE BEAM EXPANSION SECTIONTHRIE BEAM TERMINAL CONNECTOR


34"

16"


3'-1•" POST SPACING

MAX

25'-0"

7'-10•" 6'-3" 12'-6"

POST SPACING

1'-6ƒ"

3'-6"

MIN.

28"

GUARDRAIL, TYPE B


GUARDRAIL, TYPE T



INFORMATION)



34" TYPE T

AESTHETIC PARAPET TUBE, OR 3 TUBE WITH PICKETS

BRIDGE BARRIER RAILINGS, TYPE 4, 2-TUBE, 4-TUBE,

DETAILS FOR CONNECTING GUARDRAIL TO

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

6'-3"37'-6"



3 20

10 GAUGE

THRIE BEAM SECTIONS

10 GAUGE

THRIE BEAM SECTIONS






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R-67-G10-24-2019

4

SECTIONS AT BRIDGE RAILINGS

POST 3

RAILING, TYPE 5

BRIDGE BARRIER

POST 2 FOR

RAILING, TYPE 4

BRIDGE BARRIER

POST 2 FOR

RAILING, TYPE 5

BRIDGE BARRIER

POST 1 FOR

RAILING, TYPE 4

BRIDGE BARRIER

POST 1 FOR

POST 4 POST 5 POST 6

34"

(ROADWAY)

TOP OF SLAB

(ROADWAY)

TOP OF SLAB

30"

6•"6•" 7‚"

8"8"

8" 8" 8"

6" 7"

1'-10"

3" 3"

1'-6" 3

Ž"

2†" 2†"

5…

"

1'-8"

2‚"

7•" 8"8"

8"

34"

1"1•"1‡"

TYPE 4

TYPE 5

5

4

BRIDGE RAILING BOLT LENGTHTHREAD LENGTH

MINIMUM

REQUIRED

NUMBER

4"

4"11•"

12•"

RAILING TYPE 4

BRIDGE BARRIER

RAILING TYPE 5

BRIDGE BARRIER

20

NUMBER REQUIRED.) WASHER DETAILS ARE SHOWN ON SHEET 5.

AND SQUARE WASHERS ON BACK. (SEE CHART BELOW FOR LENGTHS AND

CONNECT GUARDRAIL TO BRIDGE RAILINGS WITH ROUND WASHERS ON FRONT

HIGH STRENGTH ‡" DIA. HEX HEAD BOLT AND NUTS SHALL BE USED TO

‚" BEYOND THE NUT WHEN TIGHTENED.

SHORTER BOLT LENGTHS MAY BE USED PROVIDED THE BOLT EXTENDS

GUARDRAIL TO BRIDGE RAILINGS

BOLT REQUIREMENTS FOR CONNECTING

GUARDRAIL ANCHORAGE, BRIDGE, DETAIL T1, T2, T3, T4 AND T5

GUARDRAIL POST SECTIONS FOR


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BRIDGE, DETAILS


R-67-G10-24-2019

5

3…"

1˜"

1'-8"

+

‰"

NEUTRAL AXIS8•"


4"

SPLICE BOLT SLOT (TYP.)

x 1„" 4‚" 4‚" 2"

6‚"

1'-6ƒ"

AS THRIE BEAM ELEMENT

SAME CROSS SECTION

POST BOLT SLOTS

ƒ" x 2•"

7" 12'-6"

ƒ" x 3ƒ" SLOTTED HOLES SPACED AT 1'-6ƒ"

SLOTTED HOLE (TYP.)

x 5"

‡" DIA. BOLTS

ROUND WASHER FOR

•" DIA. HOLE

2‚" DIA.

’"

‡" DIA. BOLTS

SQUARE WASHER FOR

•" DIA. HOLE

‚"

3"

1•"

3"

1•

"

3"+

2"

8•"

7‚"3"

MIN.

3…"

2'-6"

4"4"

(TYP.)

1" DIA. HOLES1˜"

4"

3…

"

BRIDGE RAILING

AVOID STEEL REINFORCEMENT IN

1" DIA. HOLES WHEN NEEDED TO

DRILL (DO NOT BURN) ADDITIONAL

1ƒ

"

3•

"3•

"

1ƒ

"

NEUTRAL AXIS

1'-0‚

"

+ ‚

"7†

"6

‰"

6‰

"

1'-8"

+

‰"

3…

"

3"+

3"8•"2" 8"

2'-6"

7†

"7†

"

3…"

1˜"

NEUTRAL AXIS

7‚"

SPECIAL END SHOE

\ BEAM ELEMENT

\ x 5" SLOTS

(OPTIONAL)

POST BOLT SLOT

ƒ" x 2•"

20

(TYP.)

1" DIA. HOLES

(OPTIONAL)

POST BOLT SLOT (TYP.)

ƒ" x 2•"

(TYP.)

SPLICE BOLT SLOT

x 1„"


REFER TO SHEET 19 FOR BOLT LOCATIONS FOR DETAILS M1, M2, M3, M4, M5 AND M6.

BOLT LOCATIONS SHOWN APPLY TO DETAILS T1, T2, T5, M7, M8 AND M9.

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SECTION A-A

3'-6"

2'-8"

1'-4"8" 8" 2'-0"

3'-6"

3'-6"

2'-4"

1'-8"

SURFACE

SHOULDER

SURFACE

SHOULDER

SURFACE

SHOULDER

SECTION B-B SECTION C-C

DETAILS FOR CONNECTING GUARDRAIL TO CONCRETE BARRIER, SINGLE FACE

BA C

BA

C

4'-0"

(TYP)

•" MAX.

12'-0"

TRANSITION SECTION

CONCRETE BARRIER, SINGLE FACE

SEE STANDARD PLAN R-54-SERIES

CONCRETE BARRIER

FROM SINGLE SLOPE SHAPE TO VERTICAL WALL

UNIFORMLY TRANSITION THE BARRIER FACES

4'-0"4'-0"

TRANSITION SECTION.

CONNECT GUARDRAIL TO CONCRETE BARRIER, SINGLE FACE

ROUND WASHERS FRONT AND BACK SHALL BE USED TO

BOLTS WITH 2" MINIMUM THREAD LENGTH AND NUTS WITH

HIGH STRENGTH ‡" DIAMETER x 26" LONG HEX HEAD

PLAN VIEW

20

FOR GUARDRAIL POST SPACING AND LAYOUT DETAILS.

REFER TO GUARDRAIL ANCHORAGE BRIDGE, DETAIL M1, M2 AND M3

*

HEIGHT.

DETAIL M1, M2, AND M3 FOR GUARDRAIL

* REFER TO GUARDRAIL ANCHORAGE BRIDGE,


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R-67-G10-24-2019

7

12

GA

UG

E

TW

O

NE

ST

ED

W-

BE

AM

SE

CTI

ON

S

12'-6"

6'-3"

12

GA

UG

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TH

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E

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AM

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CTI

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6'-3"

10

GA

UG

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TH

RI

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AM

TR

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TI

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AS

YM

ME

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CA

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12'-6"

1'-

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TY

PE

MG

S-8

GU

AR

DR

AI

L

3'-1•

"3'-1•

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SP

AC

ES

@ 3'-1•

"

6'-3"

4

SP

AC

ES

@ 1'-6

ƒ"

6'-3"

4

SP

AC

ES

@ 3'-1•

"

12'-6"

2'-8

ƒ"

32

15

41

21

11

06

78

9

2'-1•

"

31"

(V

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CA

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FA

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ON

LY)

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RE

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BA

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6'-3"

PO

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TH

RO

UG

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5

PO

ST (7'-0"

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NG)

WI

TH 1

2"

OF

FS

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BL

OC

K

PO

ST 1

TH

RO

UG

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W6 x 9

OR

W6 x 8.5

PO

ST (6'-0"

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TH 1

2"

OF

FS

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GA

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20

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8

12'-6"

12'-6"

1'-

10ƒ

"

3'-1•

"2

SP

AC

ES

@ 3'-1•

"

6'-3"

4

SP

AC

ES

@ 1'-6

ƒ"

6'-3"

2'-8

ƒ"

43

26

51

31

21

17

89

10

2'-1•

"

12'-6"

TY

PE

T

GU

AR

DR

AI

L

5

SP

AC

ES

@ 3'-1•

"

15'-7•

"

1

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S34"

(V

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CA

L

FA

CE

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LY)

CO

NC

RE

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BA

RRI

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DG

E

RAI

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NG

OR

PO

ST 1

1

TH

RO

UG

H 1

3 -

W6 x 1

5

PO

ST (7'-0"

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NG)

WI

TH 1

2"

OF

FS

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BL

OC

K

PO

ST 1

TH

RO

UG

H 1

0 -

W6 x 9

OR

W6 x 8.5

PO

ST (7'-0"

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WI

TH 1

2"

OF

FS

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6'-3"

12

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39'-4

ƒ"

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BA

CK

WA

LL)

TY

PE

6*, T

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DE

TAIL

S

FO

R

CO

NN

EC

TIN

G

GU

AR

DR

AIL

TY

PE

T

TO

pikkaw

Highlight


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

9

12'-6"

12'-6"

1'-

10ƒ

"

3'-1•

"2

SP

AC

ES

@ 3'-1•

"

6'-3"

4

SP

AC

ES

@ 1'-6

ƒ"

6'-3"

2'-8

ƒ"

54

27

61

41

31

28

91

01

1

2'-1•

"

1

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

6'-3"

10

GA

UG

E

TH

RI

E

BE

AM

TR

AN

SI

TI

ON

SY

MM

ET

RI

CA

L

31"

28"

(V

ER

TI

CA

L

FA

CE

ON

LY)

CO

NC

RE

TE

BA

RRI

ER

BRI

DG

E

RAI

LI

NG

OR

5

SP

AC

ES

@ 3'-1•

"

15'-7•

"

12'-6"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

3

GU

AR

DR

AI

L

TY

PE

B

2

SP

AC

ES

@ 6'-3"

12'-6"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

EX

PA

NSI

ON

SE

CTI

ON

S

PO

ST 1

2

TH

RO

UG

H 1

4 -

W6 x 1

5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

PO

ST 1

TH

RO

UG

H 1

1 -

W6 x 9

OR

W6 x 8.5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

*

BA

RRI

ER

EN

DI

NG

MU

ST

TR

AN

SI

TI

ON

FR

OM

SI

NG

LE-

SL

OP

E

TO

VE

RTI

CA

L

FA

CE I

N

AD

VA

NC

E

OF

EN

D

SH

OE.

AT

TA

CH

ME

NT

TO

VE

RTI

CA

L

FA

CE I

S

RE

QUI

RE

D.

4"

MA

X.

HEI

GH

T

CU

RB

&

GU

TT

ER

20

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M3

45'-7

ƒ"

(WIT

HO

UT

EX

PA

NSIO

N

AT

BA

CK

WA

LL)

TY

PE

6*, T

YP

E

7*, O

R

SIN

GL

E

FA

CE

CO

NC

RE

TE

BA

RRIE

R*

3

TU

BE

WIT

H

PIC

KE

TS,

CO

NC

RE

TE

BL

OC

K

RE

TR

OFIT,

2-T

UB

E, 4

-T

UB

E, A

ES

TH

ETIC

PA

RA

PE

T

TU

BE,

DE

TAIL

S

FO

R

CO

NN

EC

TIN

G

GU

AR

DR

AIL

TY

PE

B

TO

pikkaw

Highlight


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

10

12

GA

UG

E

TW

O

NE

ST

ED

W-

BE

AM

SE

CTI

ON

S

12'-6"

6'-3"

12

GA

UG

E

TH

RI

E

BE

AM

SE

CTI

ON

6'-3"

10

GA

UG

E

TH

RI

E

BE

AM

TR

AN

SI

TI

ON

AS

YM

ME

TRI

CA

L

12'-6"

1'-

10ƒ

"

3'-1•

"3

SP

AC

ES

@ 3'-1•

"

9'-4•

"

4

SP

AC

ES

@ 1'-6

ƒ"

6'-3"

6'-3"

1

2'-1•

"MI

N.

2'-8

ƒ"

MA

X.

3'-1•

"

GU

AR

DR

AI

L

TY

PE

MG

S-8

31"

(V

ER

TI

CA

L

FA

CE

ON

LY)

CO

NC

RE

TE

BA

RRI

ER

BRI

DG

E

RAI

LI

NG

OR

13

12

11

10

98

76

54

32

6'-3"

4

SP

AC

ES

@ 3'-1•

"

12'-6"

PO

ST 1

0

TH

RO

UG

H 1

3 -

W6 x 1

5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

PO

ST 1

TH

RO

UG

H 9 -

W6 x 9

OR

W6 x 8.5

PO

ST (6'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

*

BA

RRI

ER

EN

DI

NG

MU

ST

TR

AN

SI

TI

ON

FR

OM

SI

NG

LE-

SL

OP

E

TO

VE

RTI

CA

L

FA

CE I

N

AD

VA

NC

E

OF

EN

D

SH

OE.

AT

TA

CH

ME

NT

TO

VE

RTI

CA

L

FA

CE I

S

RE

QUI

RE

D.

4"

MA

X.

HEI

GH

T

CU

RB

&

GU

TT

ER

20

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

EX

PA

NSI

ON

SE

CTI

ON

S

12

GA

UG

E

TH

RI

E

BE

AM

SE

CTI

ON

S

TW

O

NE

ST

ED

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M4

45'-7

ƒ"

(WIT

H

EX

PA

NSIO

N

AT

BA

CK

WA

LL)

TY

PE

6*, T

YP

E

7*, O

R

SIN

GL

E

FA

CE

CO

NC

RE

TE

BA

RRIE

R*

3

TU

BE

WIT

H

PIC

KE

TS,

CO

NC

RE

TE

BL

OC

K

RE

TR

OFIT,

2-T

UB

E, 4

-T

UB

E, A

ES

TH

ETIC

PA

RA

PE

T

TU

BE,

DE

TAIL

S

FO

R

CO

NN

EC

TIN

G

GU

AR

DR

AIL

TY

PE

MG

S-8

TO

pikkaw

Highlight


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

11

12'-6"

12'-6"

1'-

10ƒ

"

3

SP

AC

ES

@ 3'-1•

"

9'-4•

"

4

SP

AC

ES

@ 1'-6

ƒ"

6'-3"

6'-3"

34"

14

13

12

11

10

98

76

54

32

2'-1•

"MI

N.

2'-8

ƒ"

MA

X.

3'-1•

"

12'-6"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

(V

ER

TI

CA

L

FA

CE

ON

LY)

CO

NC

RE

TE

BA

RRI

ER

BRI

DG

E

RAI

LI

NG

OR

PO

ST 1

1

TH

RO

UG

H 1

4 -

W6 x 1

5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

PO

ST 1

TH

RO

UG

H 1

0 -

W6 x 9

OR

W6 x 8.5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

1

6'-3"

5

SP

AC

ES

@ 3'-1•

"

15'-7•

"

*

BA

RRI

ER

EN

DI

NG

MU

ST

TR

AN

SI

TI

ON

FR

OM

SI

NG

LE-

SL

OP

E

TO

VE

RTI

CA

L

FA

CE I

N

AD

VA

NC

E

OF

EN

D

SH

OE.

AT

TA

CH

ME

NT

TO

VE

RTI

CA

L

FA

CE I

S

RE

QUI

RE

D.

GU

AR

DR

AI

L

TY

PE

T

4"

MA

X.

HEI

GH

T

CU

RB

&

GU

TT

ER

20

12

GA

UG

E

TH

RI

E

BE

AM

SE

CTI

ON

S

TW

O

NE

ST

ED

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

EX

PA

NSI

ON

SE

CTI

ON

S

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M5

45'-7

ƒ"

(WIT

H

EX

PA

NSIO

N

AT

BA

CK

WA

LL)

TY

PE

6*, T

YP

E

7*, O

R

SIN

GL

E

FA

CE

CO

NC

RE

TE

BA

RRIE

R*

3

TU

BE

WIT

H

PIC

KE

TS,

CO

NC

RE

TE

BL

OC

K

RE

TR

OFIT,

2-T

UB

E, 4

-T

UB

E, A

ES

TH

ETIC

PA

RA

PE

T

TU

BE,

DE

TAIL

S

FO

R

CO

NN

EC

TIN

G

GU

AR

DR

AIL

TY

PE

T

TO

pikkaw

Highlight


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

12

12'-6"

1'-

10ƒ

"

3

SP

AC

ES

@ 3'-1•

"

9'-4•

"

4

SP

AC

ES

@ 1'-6

ƒ"

6'-3"

6'-3"

31"

15

14

13

12

11

10

98

76

54

2

2'-1•

"MI

N.

2'-8

ƒ"

MA

X.

3'-1•

"

12'-6"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

(V

ER

TI

CA

L

FA

CE

ON

LY)

CO

NC

RE

TE

BA

RRI

ER

BRI

DG

E

RAI

LI

NG

OR

PO

ST 1

2

TH

RO

UG

H 1

5 -

W6 x 1

5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

PO

ST 1

TH

RO

UG

H 1

1 -

W6 x 9

OR

W6 x 8.5

PO

ST (6'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

32

1

6'-3"

10

GA

UG

E

TH

RI

E

BE

AM

TR

AN

SI

TI

ON

SY

MM

ET

RI

CA

L

28"

2

SP

AC

ES

@ 6'-3"

12'-6"

12'-6"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

3

TY

PE

B

GU

AR

DR

AI

L

5

SP

AC

ES

@ 3'-1•

"

15'-7•

"

*

BA

RRI

ER

EN

DI

NG

MU

ST

TR

AN

SI

TI

ON

FR

OM

SI

NG

LE-

SL

OP

E

TO

VE

RTI

CA

L

FA

CE I

N

AD

VA

NC

E

OF

EN

D

SH

OE.

AT

TA

CH

ME

NT

TO

VE

RTI

CA

L

FA

CE I

S

RE

QUI

RE

D.

4"

MA

X.

HEI

GH

T

CU

RB

&

GU

TT

ER

20

12

GA

UG

E

TH

RI

E

BE

AM

SE

CTI

ON

S

TW

O

NE

ST

ED

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

EX

PA

NSI

ON

SE

CTI

ON

S

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M6

51'-1

0ƒ

"

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M6

51'-10ƒ

"

(WIT

H

EX

PA

NSIO

N

AT

BA

CK

WA

LL)

TY

PE

6*, T

YP

E

7*, O

R

SIN

GL

E

FA

CE

CO

NC

RE

TE

BA

RRIE

R*

3

TU

BE

WIT

H

PIC

KE

TS,

CO

NC

RE

TE

BL

OC

K

RE

TR

OFIT,

2-T

UB

E, 4

-T

UB

E, A

ES

TH

ETIC

PA

RA

PE

T

TU

BE,

DE

TAIL

S

FO

R

CO

NN

EC

TIN

G

GU

AR

DR

AIL

TY

PE

B

TO

pikkaw

Highlight


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

13

12

GA

UG

E

TW

O

NE

ST

ED

W-

BE

AM

SE

CTI

ON

S

12'-6"

6'-3"

10

GA

UG

E

TH

RI

E

BE

AM

TR

AN

SI

TI

ON

AS

YM

ME

TRI

CA

L

TY

PE

MG

S-8

GU

AR

DR

AI

L

3'-1•

"4

SP

AC

ES

@ 3'-1•

"

12'-6"

32

15

46

6'-3"

12

GA

UG

E

TH

RI

E

BE

AM

SE

CTI

ON

12'-6"

3

SP

AC

ES

@ 3'-1•

"

9'-4•

"

4

SP

AC

ES

@ 1'-6ƒ

"

6'-3"

51

31

11

06

78

9

2'-1•

"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

31"

12

1'-

10ƒ

"

MI

N.

2'-8

ƒ"

12'-6"

DE

PT

H 2'-1•

"

FR

OM

BRI

DG

E

PI

ER.

WH

EN

FI

RS

T

PO

ST

CA

N

BE I

NS

TA

LL

ED

FU

LL

**

FI

LL

ER

WA

LL

EN

D

BL

OC

K

MA

Y

BE

OM

MI

TE

D

**

PI

ER

BRI

DG

E

31"

PO

ST 1

0

TH

RO

UG

H 1

3 -

W6 x 1

5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

PO

ST 1

TH

RO

UG

H 9 -

W6 x 9

OR

W6 x 8.5

PO

ST (6'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

FI

LL

ER

WA

LL (

VE

RTI

CA

L

FA

CE)

6'-3"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

EX

PA

NSI

ON

SE

CTI

ON

S

DE

TAIL

S

FO

R

CO

NN

EC

TIN

G

GU

AR

DR

AIL

TY

PE

MG

S-8

TO

FIL

LE

R

WA

LL

4"

MA

X.

HEI

GH

T

CU

RB

&

GU

TT

ER

20

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M7

51'-1

0ƒ

"

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M7

51'-10ƒ

"


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

14

12'-6"

43

26

57

12'-6"

3

SP

AC

ES

@ 3'-1•

"

9'-4•

"

4

SP

AC

ES

@ 1'-6ƒ

"

6'-3"

61

41

21

17

89

10

2'-1•

"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

34"

13

1'-

10ƒ

"

MI

N.

2'-8

ƒ"

12'-6"

DE

PT

H 2'-1•

"

FR

OM

BRI

DG

E

PI

ER.

WH

EN

FI

RS

T

PO

ST

CA

N

BE I

NS

TA

LL

ED

FU

LL

**

FI

LL

ER

WA

LL

EN

D

BL

OC

K

MA

Y

BE

OM

MI

TE

D

**

PI

ER

BRI

DG

E

45

12'-6"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

TY

PE

T

GU

AR

DR

AI

L

34"

DE

TAIL

S

FO

R

CO

NN

EC

TIN

G

GU

AR

DR

AIL

TY

PE

T

TO

FIL

LE

R

WA

LL

FI

LL

ER

WA

LL (

VE

RTI

CA

L

FA

CE)

PO

ST 1

1

TH

RO

UG

H 1

4 -

W6 x 1

5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

PO

ST 0

TH

RO

UG

H 1

0 -

W6 x 9

OR

W6 x 8.5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

EX

PA

NSI

ON

SE

CTI

ON

S

5

SP

AC

ES

@ 3'-1•

"

15'-7•

"

1

6'-3"

4"

MA

X.

HEI

GH

T

CU

RB

&

GU

TT

ER

20

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M8

51'-1

0ƒ

"

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M8

51'-10ƒ

"


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

15

12'-6"

6'-3"

10

GA

UG

E

TH

RI

E

BE

AM

TR

AN

SI

TI

ON

SY

MM

ET

RI

CA

L

35

46

12'-6"

12'-6"

3

SP

AC

ES

@ 3'-1•

"

9'-4•

"

4

SP

AC

ES

@ 1'-6ƒ

"

6'-3"

71

51

31

28

910

11

2'-1•

"

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

31"

14

1'-

10ƒ

"

MI

N.

2'-8

ƒ"

12'-6"

DE

PT

H 2'-1•

"

FR

OM

BRI

DG

E

PI

ER.

WH

EN

FI

RS

T

PO

ST

CA

N

BE I

NS

TA

LL

ED

FU

LL

**

FI

LL

ER

WA

LL

EN

D

BL

OC

K

MA

Y

BE

OM

MI

TE

D

**

PI

ER

BRI

DG

E

21

5

SP

AC

ES

@ 3'-1•

"

15'-7•

"

TY

PE

B

GU

AR

DR

AI

L

DE

TAIL

S

FO

R

CO

NN

EC

TIN

G

GU

AR

DR

AIL

TY

PE

B

TO

FIL

LE

R

WA

LL

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

SE

CTI

ON

S

12

GA

UG

E

TH

RI

E

BE

AM

SE

CTI

ON

S

TW

O

NE

ST

ED

28"

FI

LL

ER

WA

LL (

VE

RTI

CA

L

FA

CE)

PO

ST 1

2

TH

RO

UG

H 1

5 -

W6 x 1

5

PO

ST (7'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

PO

ST 1

TH

RO

UG

H 1

1 -

W6 x 9

OR

W6 x 8.5

PO

ST (6'-0"

LO

NG)

WI

TH 1

2"

OF

FS

ET

BL

OC

K

56

2

SP

AC

ES

@ 6'-3"

12'-6"

78

12

GA

UG

E

TW

O

NE

ST

ED

TH

RI

E

BE

AM

EX

PA

NSI

ON

SE

CTI

ON

S

4"

MA

X.

HEI

GH

T

CU

RB

&

GU

TT

ER

20

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M9

58'-1

ƒ"

GU

AR

DR

AI

L

AN

CH

OR

AG

E,

BRI

DG

E,

DE

TAI

L

M9

58'-1

ƒ"


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

16 20

(TYP)

•" MAX.

4'

2 TUBE

4 TUBE

AESTHETIC PARAPET TUBE

3 TUBE WITH PICKETS

TYPE 6

TYPE 7

GUARDRAIL TO BRIDGE RAILINGS

BOLT REQUIREMENTS FOR CONNECTING

THICKNESS

WALL

THICKNESS

WALL

RAILING

BRIDGE

1'-5•"

1'-7"

1'-0"

1'-0"

1'-0"

1'-4•"

1'-7•"

1'-9"

1'-2"

1'-2"

1'-2"

1'-6•"

LENGTH

BOLT

THREAD LENGTH

MINIMUM

4"

4"

4"

4"

4"

4"

‚" BEYOND THE NUT WHEN TIGHTENED.

SHORTER BOLT LENGTHS MAY BE USED PROVIDED THE BOLT EXTENDS

HEIGHT.

DETAIL M1 THROUGH M9 FOR GUARDRAIL

REFER TO GUARDRAIL ANCHORAGE BRIDGE,

(ROADWAY)

TOP OF SLAB

GU

AR

DR

AI

L

HEI

GH

T

CURB & GUTTER

4" MAX. HEIGHT

POST DETAIL

GUARDRAIL ANCHORAGE, BRIDGE, DETAIL M1 THROUGH M9

GUARDRAIL POST SECTIONS FOR

BRIDGE RAILING & FILLER WALL

ALTERNATE CONSTRUCTION METHOD

FILLER WALL

VARIES 4"WALL THK + 2"

APPLICABLE ONLY TO FILLER WALLS

** FILLER WALL

3. WHEN CONDITIONS PROHIBIT THE USE OF BOLTS

2. IN EXISTING FILLER WALLS THICKER THAN 1'-6"

FILLER WALL EXTENSION

WALL IS A DIFFERENT THICKNESS THAN THE

1. AT OR NEAR THE JOINT LINE WHEN A FILLER

LOCATIONS:

THROUGH THE FILLER WALL, IN THE FOLLOWING

WALLS WILL BE ALLOWED, INSTEAD OF BOLTING

EMBEDDED 8" TO ATTACH GUARDRAIL TO FILLER

** THE USE OF ‡" DIA. ADHESIVE ANCHORED BOLTS

4"1'-3ƒ"CONCRETE BLOCK RETROFIT 1'-5ƒ"

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Highlight

pikkaw

Rectangle

BRIDGE, DETAILS


R-67-G10-24-2019

17

4‚"4‚" 2"4‚"4‚"2"

7'-3•"

1'-6ƒ" 1'-6ƒ"

1'-8"

+

‰"


ƒ" x 2•"

SPLICE BOLT SLOT (TYP.)

x 1„"

1'-6ƒ" 1'-6ƒ"

6'-3" THRIE BEAM SECTION

7„

"

1'-2‚

"1'-0"

TOP

FRONT

W BEAM GUARDRAIL

OFFSET BLOCK FOR

FRONT

THRIE BEAM GUARDRAIL

OFFSET BLOCK FOR

TOP

Š" “"

2"

†"

†"

1„

"

1Š"

)•

"+ˆ

"

-

"

SPLICE BOLT

GUARDRAIL BEAM ELEMENTS

FOR USE WITH NESTED

20

…"

6"

4‚"

ƒ" DIA. HOLE

1'-0"

…"

6"

4‚"

7„

"

1'-7"

7†

"4‚

"

FRONT

THRIE BEAM GUARDRAIL

OFFSET BLOCK FOR

ƒ" DIA. HOLE

TOP

1'-0"

6"

7„

"

1'-7"

7†

"4‚

"

FOR USE WITH W6 x 15 POSTSFOR USE WITH W6 x 8.5 OR W6 x 9 POSTS

1„"

< „"

\

1„"

< „"

\

ƒ" DIA. HOLE

1„"

< „"

\


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

18

3•"

ƒ"

7†

"7

‰"

5‡"

7'-0"

6"

FRONT SIDE FRONT SIDE

W6 x 15 POST

W6 x 8.5 POST

W6 x 9 OR

TOP TOP

6"

ƒ" DIA. HOLE *

GUARDRAIL

WITH THRIE BEAM

* BOTTOM HOLE FOR USE

6'-0"

OR 7'-0"

20

(OPTIONAL)

GALVANIZING HOLE

2"

TO 3"

(OPTIONAL)

GALVANIZING HOLE

2"

TO 3"

7†

"7

‰"

ƒ" DIA. HOLE

1‡"


OF

SHEET




OF

SHEET



7†

"6

‰"

6‰

"

1'-8"

<

‰"

8•"8"2"

7‚"7†

"3

Ž"

3"

2'-6"

3"<

3…

"

(TYP.)

SPLICE BOLT SLOT

ž" x 1„"

(OPTIONAL)


ƒ" x 2•"

(TYP.)

1" DIA. HOLE

GUARDRAIL ANCHORAGE TYPE M1, M3, M4, M6

BOLT LOCATION FOR


7†

"6

‰"

6‰

"

1'-8"

<

‰"

8•"8"2"

7‚"

7†

"3

Ž"

3"

2'-6"

3"<

3…

"

(TYP.)

SPLICE BOLT SLOT

ž" x 1„"

(OPTIONAL)


ƒ" x 2•"

(TYP.)

1" DIA. HOLE

GUARDRAIL ANCHORAGE TYPE M2, M5

BOLT LOCATION FOR


BRIDGE, DETAILS


R-67-G10-24-2019

19 20

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BRIDGE SPANS A BRIDGE EXPANSION JOINT.

SEE APPROPRIATE PLANS TO DETERMINE WHETHER GUARDRAIL ANCHORAGE,

FILLER WALL END BLOCK.

SEE THE CURRENT STANDARD PLAN R-55-SERIES FOR FILLER WALLS AND

BE LAPPED IN EITHER DIRECTION.

TRAFFIC, EXCEPT FOR THE THRIE BEAM TERMINAL CONNECTOR WHICH MAY

GUARDRAIL BEAM ELEMENTS SHALL BE LAPPED IN THE DIRECTION OF

USE IN ANCHORAGE SHALL BE FIELD BENT.

SECTIONS OF THE THRIE BEAM ELEMENT REQUIRED TO BE TWISTED FOR

STANDARD.

PLAN R-60-SERIES, WHERE APPLICABLE, EXCEPT AS SPECIFIED ON THIS

THE CURRENT STANDARD SPECIFICATIONS AND TO THE CURRENT STANDARD

HARDWARE, (INCLUDING BOLTS, NUTS, AND WASHERS) SHALL CONFORM TO

ALL POSTS, OFFSET BLOCKS, BEAM ELEMENTS, REFLECTORS, AND

NOTES:

FACE, TYPE __".

SEE STANDARD PLAN R-54-SERIES FOR "CONCRETE BARRIER, SINGLE

TYPE __".

INCLUDED IN THE PAY ITEM "CONCRETE BARRIER, SINGLE FACE,

CONCRETE BARRIER, SINGLE FACE TRANSITION SECTION SHALL BE


OF

SHEET



BRIDGE, DETAILS


R-67-G10-24-2019

20 20

GAUGE MUST MEET CLASS B REQUIREMENTS PER AASHTO M 180.

REQUIREMENTS PER AASHTO M 180. BEAM ELEMENTS IDENTIFIED AS 10

BEAM ELEMENTS IDENTIFIED AS 12 GAUGE MUST MEET CLASS A

GUTTER AND DOWNSPOUT HEADER.

SEE THE CURRENT STANDARD PLAN R-32-SERIES FOR APPROACH CURB AND

COLD CHISEL, SO THAT IT WILL NOT LOOSEN.

FIRST THREAD ON THE OUTSIDE OF THE NUT WITH A CENTER PUNCH OR

BEYOND THE NUT. THIS SHALL BE FOLLOWED UP BY UPSETTING THE

ENGAGE THE SPLICE BOLT WITH A MINIMUM OF ONE THREAD EXTENDING

SPLICE BOLT NUT SHALL BE INSTALLED FINGER-TIGHT AND SHALL FULLY

SPLICING THE SPECIAL END SHOE TO THE TRANSITION SECTION. THE

TERMINAL CONNECTOR TO THE THRIE BEAM EXPANSION SECTION AND WHEN

SPLICE BOLTS SHALL BE USED WHEN SPLICING THE THRIE BEAM

NOT BE LIGHTER THAN 10 GAUGE (0.138").

BE THE SAME MATERIAL AS ADJACENT RUN OF GUARDRAIL, AND SHALL

THE THRIE BEAM TERMINAL CONNECTOR AND SPECIAL END SHOE SHALL

W6 x 9) OR WOOD POSTS (6" x 8").

T1 THROUGH T6, SHALL BE 7'-0" LONG STEEL POSTS (W6 x 8.5 OR

ALL POSTS USED TO CONSTRUCT GUARDRAIL ANCHORAGE, BRIDGE, DETAIL

SECTION.

ž" x 5" LONG SLOTTED HOLES IN THE THRIE BEAM EXPANSION

THAT THE THRIE BEAM TERMINAL CONNECTOR BE ATTACHED TO THE

GUARDRAIL ANCHORAGE, BRIDGE, DETAILS T1, T2, AND T5 REQUIRE

DEP

AR

TM

EN

T

DIR

EC

TO

RMIC

HIG

AN

DEP

AR

TM

EN

T

OF TR

AN

SP

OR

TATIO

N

OF

SH

EE

T

PLAN DATE

F.H.

W.A. APPROVAL

CHECKED BY:

DRA

WN BY:

Mic

hig

an

Department of Transportatio

n

BU

RE

AU

OF

DE

VELO

PM

EN

T ST

AN

DA

RD

PLA

N

FO

R

APPROVED BY:

APPROVED BY:

Paul C. Ajegba

BY

PREP

ARE

D

DESI

GN

DI

VISI

ON


DIRECTOR, BUREAU OF DEVELOP

MENT

APPROVED BY:

DIRECTOR, BUREAU OF BRIDGES AND STRUCTURES

DETAILS FOR CONNECTING GUARDRAIL TYPE MGS-8 TO BRIDGE RAILING, THRIE BEAM RETROFIT

5"

12'-6" 12'-6" 6'-3"

12 GAUGE

SECTION

THRIE BEAM

6'-3"

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

12'-6"

GUARDRAIL ANCHORAGE, BRIDGE, DETAIL A3

50'-0"

TYPE MGS-8

GUARDRAIL

THRIE BEAM RETROFIT

* BRIDGE RAILING

OFFSET BLOCK

WITH 12"

(7'-0" LONG)

W6 x 15 POST

MAX.

ON BRIDGE VARIES

LOCATION OF SPLICE

WITH 12" OFFSET BLOCK

(7'-0" LONG)

W6 x 9 OR W6 x 8.5 POST


(6'-0" LONG)


3'-1•"6'-3"4 SPACES @ 3'-1•"

12'-6"

CURB & GUTTER

4" MAX. HEIGHT

34"

REFERENCE LINE

PLAN

ELEVATION

31"

8 7 6 5 4 3 2 1

1B-2

2-E

5

B.L.T.

V.Z.

(R4

TY

PE

BRID

GE

RAILIN

G)

TH

RIE

BE

AM

RE

TR

OFIT

BRID

GE

RAILIN

G,

10-23-2019

3'-1•"

**

10 GAUGE ***


***

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

W-BEAM SECTIONS

TWO NESTED

@ 3'-1•"

(MINIMUM)

2 SPACES

@ 1'-6ƒ"

(MINIMUM)

4 SPACES

END POSTS

TYP. AT

BRIDGE REFERENCE LINES.

GUARDRAIL SPLICE IS NOT LOCATED WITHIN THE

12 GAUGE, WHEN THE CENTERLINE OF THE NOTED

*** USE TWO NESTED THRIE BEAM EXPANSION SECTIONS,

SPACING ADJUSTMENT.

** SEE PLAN OF ADDITIONAL POST DETAIL FOR POST

TWO EXISTING GUARDRAIL RUNS. SEE SHEET 4.

REFERENCE LINES EXCEPT WHEN CONNECTING BETWEEN

* TO BE A MULTIPLE OF 12'-6" AND CENTERED BETWEEN

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Highlight

MIC

HIG

AN

DEP

AR

TM

EN

T

OF TR

AN

SP

OR

TATIO

N

OF

SH

EE

T

PLAN DATE

F.H.

W.A. APPROVAL

BU

RE

AU

OF

DE

VELO

PM

EN

T ST

AN

DA

RD

PLA

N

FO

R

DETAILS FOR CONNECTING GUARDRAIL TYPE T TO BRIDGE RAILING, THRIE BEAM RETROFIT

REFERENCE LINE

PLAN

12'-6" 12'-6" 12'-6"


50'-0"

THRIE BEAM RETROFIT

* BRIDGE RAILING

ON BRIDGE VARIES

LOCATION OF SPLICE

8 7 6 5 4

12'-6"

9 3 2 1

TYPE T

GUARDRAIL

34"

CURB & GUTTER

4" MAX. HEIGHT

34"

OFFSET BLOCK

WITH 12"

(7'-0" LONG)

W6 x 15 POST

MAX.


(7'-0" LONG)


6'-3"5 SPACES @ 3'-1•"

15'-7•"

ELEVATION

2B-2

2-E

5

TH

RIE

BE

AM

RE

TR

OFIT

(R4

TY

PE

BRID

GE

RAILIN

G)

BRID

GE

RAILIN

G,

10-23-2019

3'-1•"

**

5"

***

END POSTS

TYP. AT

@ 3'-1•"

(MINIMUM)

2 SPACES

@ 1'-6ƒ"

(MINIMUM)

4 SPACES

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

10 GAUGE ***






SPACING ADJUSTMENT.





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Highlight

MIC

HIG

AN

DEP

AR

TM

EN

T

OF TR

AN

SP

OR

TATIO

N

OF

SH

EE

T

PLAN DATE

F.H.

W.A. APPROVAL

BU

RE

AU

OF

DE

VELO

PM

EN

T ST

AN

DA

RD

PLA

N

FO

R

DETAILS FOR CONNECTING GUARDRAIL TYPE B TO BRIDGE RAILING, THRIE BEAM RETROFIT

REFERENCE LINE

PLAN

12'-6" 12'-6" 12'-6"


56'-3"

THRIE BEAM RETROFIT

* BRIDGE RAILING

ON BRIDGE VARIES

LOCATION OF SPLICE

FROM 34" TO 31"

TRANSITION GUARDRAIL HEIGHT

12'-6"

CURB & GUTTER

4" MAX. HEIGHT

34"

31"

6'-3"

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

TYPE B

GUARDRAIL

OFFSET BLOCK

WITH 12"

(7'-0" LONG)

W6 x 15 POST

MAX.


(7'-0" LONG)


5 SPACES @ 3'-1•"

15'-7•"

2 SPACES @ 6'-3"

12'-6"

28"

ELEVATION

3B-2

2-E

5

(R4

TY

PE

BRID

GE

RAILIN

G)

TH

RIE

BE

AM

RE

TR

OFIT

BRID

GE

RAILIN

G,

10-23-2019

9 810 7 6 5 4 3 2 1

3'-1•"

**

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

10 GAUGE ***


5"

***

END POSTS

TYP. AT

@ 3'-1•"

(MINIMUM)

2 SPACES

@ 1'-6ƒ"

(MINIMUM)

4 SPACES





SPACING ADJUSTMENT.





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OF

SHEET



4B-22-E

5

(R4 TY PE BRIDGE RAILIN G)

TH RIE BEA M RETROFIT

BRIDGE RAILIN G,

10-23-2019

EXPANSION SECTION

THRIE BEAM REFERENCE LINE

BRIDGE

BLOCKS AND END POST

1" DIA. HOLES IN BEAM,

\ WOOD BLOCKS AND \

(TYP. AT PIERS OR ABUTMENTS)

AND THE BRIDGE EXPANSION JOINT.

THAT LIE BETWEEN THE SLOTTED SPLICE

THRIE BEAM EXPANSION SECTION AT POSTS

PLACE 1" x 5" SLOTS FOR POST STUDS IN

BRIDGE EXPANSION JOINT

5"

ž " x 5" SLOTS (TYP.)

EXPANSION SPLICE WITH


SPLICE

EXPANSION

ELEV ATION SH OW IN G TH RIE BEA M RETROFIT OVER BRIDGE EXPA N SION JOIN TS

AT A BU TM EN TAT PIER

LENGTH

BRIDGE RETROFIT

SPLICE

\ PROPOSED

SK ETCH FOR RETROFITTIN G BETW EEN TW O EXISTIN G RU N S OF G U A RDRAIL

X Y

Z

Z Z

Z

REMOVE ALL EXISTING GUARDRAIL BETWEEN EXISTING SPLICES

BRIDGE RAILING LENGTH

BETWEEN TWO EXISTING RUNS OF GUARDRAIL

INSTRUCTIONS FOR LAYING OUT RETROFIT

SPLICE BACK TOWARD THE BRIDGE.

1. MEASURE THE APPROPRIATE "Z" DISTANCE FROM ONE END OF THE BRIDGE RAILING AND LOCATE THE FIRST EXISTING

3. REPEAT STEPS 1 AND 2, FROM OPPOSITE END OF THE BRIDGE TO OBTAIN "Y" DIMENSION.

THIS DIMENSION WILL VARY FROM 0 TO 12'-6".

2. FROM THIS SPLICE, MEASURE THE SAME "Z" DISTANCE BACK TOWARD THE BRIDGE TO OBTAIN THE "X" DIMENSION.

4. SUBTRACT THE SUM OF "X" + "Y" FROM BRIDGE RAILING LENGTH. THIS WILL BE THE BRIDGE RETROFIT LENGTH.

THE REMAINDER WILL BE THE LENGTH OF A SHORTENED ELEMENT.

5. DIVIDE THE BRIDGE RETROFIT LENGTH BY 12'-6" TO OBTAIN THE NUMBER OF BEAM ELEMENTS PLUS A REMAINDER.

IN STEP 5.

RETROFIT WILL CONTAIN TWO SHORTENED BEAM ELEMENTS WITH ONE LESS 12'-6" BEAM ELEMENT THAN CALCULATED

6. WHEN THE REMAINDER IS LESS THAN 2'-6", ADD 12'-6" TO THE REMAINDER AND DIVIDE BY TWO. THE BRIDGE

W ASH ERS U SED W ITH 7/8" DIA. STU DS

SQU A RE W ASH ERROU N D W ASH ER

• " DIA. HOLE • " DIA. HOLE1ƒ" DIA.

1•"

3"

1•"

3"

„"‚"

PRIOR TO BEING GALVANIZED

WELDED FLUSH TO END OF THREADED STUD

NUT SHALL FULLY ENGAGE THREADS AND BE

7/8" DIA. TH REA DED STU D

3" MIN.

LENGTH AS NEEDED

Z = 56'-3" WHEN CONNECTING TO BEAM GUARDRAIL, TYPE B. USE GUARDRAIL ANCHORAGE, BRIDGE, DETAIL A5

Z = 50'-0" WHEN CONNECTING TO BEAM GUARDRAIL, TYPE T. USE GUARDRAIL ANCHORAGE, BRIDGE, DETAIL A4

Z = 50'-0" WHEN CONNECTING TO BEAM GUARDRAIL, TYPE MGS-8. USE GUARDRAIL ANCHORAGE, BRIDGE, DETAIL A3

EXISTING BRIDGE SIDEWALK

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

(REFER TO SHEETS 1 THROUGH 3)

THRIE BEAM EXPANSION SECTION(S)

GUARDRAIL

* EXISTING

SPLICE *

\ EXISTING

GUARDRAIL

* EXISTING

AND A 6'-3" POST SPACING.

POSTS WITH GUARDRAIL TYPE MGS-8

BE LOCATED AT MIDSPAN BETWEEN

DIAGRAM. SPLICE LOCATION WILL

6'-3" POST SPACING DEPICTED IN

* GUARDRAIL TYPE B OR TYPE T WITH

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OF

SHEET



B-22-E

(SEE NOTES)

WASHERS

REFLECTORIZED

MAX.

6ƒ"

MIN.

O

AS REQUIRED

BLOCK OUT

MAX.

6ƒ"

MIN.

O

(6" WIDE)

WOOD OFFSET BLOCK

(6" WIDE)

WOOD BLOCKOUT

WASHER UNDER OUTSIDE NUT.

UNDER WELDED NUT AND SQUARE

STUD WITH ROUND WASHER

POST. \ ‡" DIA. THREADED

WOOD BLOCKS AND CONCRETE

\ 1" DIA. HOLE IN BEAM,

7†

"

BLOCK OUT

AS REQUIRED

TOP OF EXISTING WEARING SURFACETOP OF EXISTING WEARING SURFACE

1'-6" 2'-6"

2'-

10"

2'-

3ƒ

"

THRIE BEAM ELEMENT

SAME CROSS SECTION AS

SECTIONS 807 & 908 OF THE STANDARD SPECIFICATIONS.

ALL WORK AND MATERIAL SHALL BE IN ACCORDANCE WITH

NOTES:

SPLICE BOLTS.

ATTACHED AT UPPER POST BOLT SLOTS WITH STANDARD

INTERVALS AT BEAM ELEMENT SPLICES. THEY SHALL BE

REFLECTORIZED WASHERS SHALL BE SPACED AT 25'-0"

SHOWN ON THIS PLAN.

PLAN R-60-SERIES, WHERE APPLICABLE, EXCEPT AS

ANCHORAGES SHALL CONFORM TO THE CURRENT STANDARD

BRIDGE RAILING, THRIE BEAM RETROFIT AND GUARDRAIL

8•" 2"

4‚"

1'-

8"

3…"

7" 12'-6" 6‚"

4"

SLOTTED HOLES

ž " x 5"

SLOTTED HOLES

ž " x 1„"

POST BOLT SLOTS

ƒ" x 2•"

WASHER UNDER OUTSIDE NUT.

UNDER WELDED NUT AND SQUARE

STUD WITH ROUND WASHER

POST. \ ‡" DIA. THREADED

WOOD BLOCKS AND CONCRETE

\ 1" DIA. HOLE IN BEAM,

(6" WIDE)

WOOD BLOCKOUT

7†

"

2'-

10"

2'-

3ƒ

"

(SEE NOTES)

WASHERS

REFLECTORIZED

SECTION S TH RU R4 RAILIN G

1'-6ƒ" <SPACED AT 1'-6ƒ" <

ƒ" x 3ƒ" SLOTTED HOLES

TH RIE BEA M EXPA N SION SECTION

POSTS AND REMOVABLE METAL PANELS WITH GRIDS OF THIS PATTERN.

R4 TYPE BRIDGE RAILINGS CAN BE IDENTIFIED AS HAVING CONCRETE

NOTE:

GUARDRAIL.

EXISTING R4 TYPE BRIDGE RAILINGS AND APPROACH

THIS STANDARD IS INTENDED FOR USE IN UPGRADING OF

5 5

(R4 TY PE BRIDGE RAILIN G)


BRIDGE RAILIN G,

10-23-2019

BRIDGE CURB

FRONT FACE OF

MAX.

BEAM ELEMENT

ADDED GUARDRAIL POST

REFERENCE LINE

WOOD OFFSET BLOCK

BRIDGE RAILING END POST 5"

1'-6ƒ"

PLA N OF A DDITION AL POST DETAIL

FRONT FACE OF APPROACH CURB

WOOD BLOCKOUT

IMMEDIATELY ADJACENT TO STRUCTURE

BLOCK AND OFFSET BLOCK (AS SHOWN)

ELEMENT AND PLACE AN ADDITIONAL POST,

ADDITIONAL HOLES FOR POST BOLTS IN BEAM

WHEN THIS DISTANCE EXCEEDS 3'-1•", DRILL

STRUCTURE REFERENCE LINE

FOR 3'-1•" POST SPACING BEYOND

FIRST SET OF POST BOLT SLOTS

MAINTAINING REQUIRED POST SPACING.

OFFSET BLOCK WIDTH TO LOCATE POST WHILE

IT MAY BE NECESSARY TO INCREASE THE 12"

FOR BRIDGES SKEWED IN DIRECTION SHOWN,

2 SPACES (MINIMUM) @ 3'-1•" 4 SPACES (MINIMUM) @ 1'-6ƒ"

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PLAN DATE

F.H.

W.A. APPROVAL

CHECKED BY:

DRA

WN BY:

Mic

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Department of Transportatio

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APPROVED BY:

APPROVED BY:

Paul C. Ajegba

BY

PREP

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DIRECTOR, BUREAU OF DEVELOP

MENT

APPROVED BY:

DIRECTOR, BUREAU OF BRIDGES AND STRUCTURES

DETAILS FOR CONNECTING GUARDRAIL TYPE MGS-8 TO BRIDGE RAILING, THRIE BEAM RETROFIT

12'-6" 12'-6" 6'-3"

12 GAUGE

SECTION

THRIE BEAM

6'-3"

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

12'-6"


50'-0"

TYPE MGS-8

GUARDRAIL

THRIE BEAM RETROFIT

* BRIDGE RAILING

OFFSET BLOCK

WITH 12"

(7'-0" LONG)

W6 x 15 POST

MAX.

ON BRIDGE VARIES

LOCATION OF SPLICE


(7'-0" LONG)



(6'-0" LONG)


3'-1•"6'-3"4 SPACES @ 3'-1•"

12'-6"

CURB & GUTTER

4" MAX. HEIGHT

34"

REFERENCE LINE

PLAN

ELEVATION

31"

8 7 6 5 4 3 2 1

3'-1•"

16

B.L.T.

V.Z.

TH

RIE

BE

AM

RE

TR

OFIT

BRID

GE

RAILIN

G,

10-23-2019

OVER BRIDGE EXPANSION JOINTS.)

(SEE ELEVATION SHOWING THRIE BEAM RETROFIT

SIDES OF EXPANSION SPLICE AND AT END POST

PLACE WOOD BLOCKOUTS ON CONCRETE POSTS BOTH

(CONCRETE HEADWALL - SEE NOTES)

ALTERNATE CONCRETE POSTS

SPACE WOOD BLOCKOUTS AT

B-2

3-F

(OP

EN

PA

RA

PE

T

TY

PE

BRID

GE

RAILIN

G)

5"

***

END POSTS

TYP. AT

10 GAUGE ***


12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

W-BEAM SECTIONS

TWO NESTED

@ 3'-1•"

(MINIMUM)

2 SPACES

@ 1'-6ƒ"

(MINIMUM)

4 SPACES





SPACING ADJUSTMENT.





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DETAILS FOR CONNECTING GUARDRAIL TYPE T TO BRIDGE RAILING, THRIE BEAM RETROFIT

REFERENCE LINE

PLAN

12'-6" 12'-6" 12'-6"


50'-0"

THRIE BEAM RETROFIT

* BRIDGE RAILING

ON BRIDGE VARIES

LOCATION OF SPLICE

8 7 6 5 4

12'-6"

9 3 2 1

TYPE T

GUARDRAIL

34"

CURB & GUTTER

4" MAX. HEIGHT

34"

OFFSET BLOCK

WITH 12"

(7'-0" LONG)

W6 x 15 POST

MAX.


(7'-0" LONG)


6'-3"5 SPACES @ 3'-1•"

15'-7•"

ELEVATION

3'-1•"

26

TH

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BRID

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RAILIN

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B-2

3-F

(OP

EN

PA

RA

PE

T

TY

PE

BRID

GE

RAILIN

G)

5"

END POSTS

TYP. AT

***

@ 3'-1•"

(MINIMUM)

2 SPACES

@ 1'-6ƒ"

(MINIMUM)

4 SPACES

10 GAUGE ***


12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED





SPACING ADJUSTMENT.





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W.A. APPROVAL

BU

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DETAILS FOR CONNECTING GUARDRAIL TYPE B TO BRIDGE RAILING, THRIE BEAM RETROFIT

REFERENCE LINE

PLAN

12'-6" 12'-6" 12'-6"


56'-3"

THRIE BEAM RETROFIT

* BRIDGE RAILING

ON BRIDGE VARIES

LOCATION OF SPLICE

FROM 34" TO 31"

TRANSITION GUARDRAIL HEIGHT

12'-6"

CURB & GUTTER

4" MAX. HEIGHT

34"

31"

6'-3"

10 GAUGE

TRANSITION

THRIE BEAM

SYMMETRICAL

TYPE B

GUARDRAIL

OFFSET BLOCK

WITH 12"

(7'-0" LONG)

W6 x 15 POST

MAX.


(7'-0" LONG)


5 SPACES @ 3'-1•"

15'-7•"

2 SPACES @ 6'-3"

12'-6"

28"

ELEVATION

36

TH

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BE

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OFIT

BRID

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RAILIN

G,

10-23-2019

9 810 7 6 5 4 3 2 1








3'-1•"

**

B-2

3-F

(OP

EN

PA

RA

PE

T

TY

PE

BRID

GE

RAILIN

G)

5"

END POSTS

TYP. AT

***

@ 3'-1•"

(MINIMUM)

2 SPACES

@ 1'-6ƒ"

(MINIMUM)

4 SPACES

10 GAUGE ***


12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED

12 GAUGE

THRIE BEAM SECTIONS

TWO NESTED





SPACING ADJUSTMENT.





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BRIDGE RAILIN G,

10-23-2019 B-23-F

EXPANSION SECTION

THRIE BEAM

ROU N D W ASH ER SQU A RE W ASH ER

PRIOR TO BEING GALVANIZED

WELDED FLUSH TO END OF THREADED STUD

NUT SHALL FULLY ENGAGE THREADS AND BE

BACKWALL

EXISTING

RETU RN W IN G W ALLS

AT PIER OR A BU TM EN T W ITH

SLOPEW ALLS

AT A BU TM EN T W ITH

ELEV ATION SH OW IN G TH RIE BEA M RETROFIT OVER BRIDGE EXPA N SION JOIN TS

W ASH ERS U SED W ITH 7/8" DIA. STU DS 7/8" DIA. TH REA DED STU D

LIE BETWEEN THE SLOTTED SPLICE AND THE BRIDGE EXPANSION JOINT.

LAG SCREWS IN THRIE BEAM EXPANSION SECTION AT POST BLOCKOUTS THAT

PLACE 1" x 5" SLOTS FOR POST STUDS AND ƒ" x 5" SLOTS FOR

IN BEAM, BLOCKOUT AND RAILING POST

\ WOOD BLOCKOUT AND \ 1" DIA. HOLES

ž " x 5" SLOTS (TYP.)

EXPANSION SPLICE WITH BRIDGE EXPANSION JOINT EXPANSION SPLICE


5"

1'-6"

PROPOSED CONCRETE RAILING POST

1ƒ" DIA. • " DIA. HOLE

„"

• " DIA. HOLE

1•"

3"

1•"

3"

‚"

LENGTH AS NEEDED

3" MIN.

(OPEN PA RAPET TY PE BRIDGE RAILIN G)

LENGTH

BRIDGE RETROFIT

SPLICE

\ PROPOSED

SK ETCH FOR RETROFITTIN G BETW EEN TW O EXISTIN G RU N S OF G U A RDRAIL

X Y

Z

Z Z

Z

REMOVE ALL EXISTING GUARDRAIL BETWEEN EXISTING SPLICES

BRIDGE RAILING LENGTH

BETWEEN TWO EXISTING RUNS OF GUARDRAIL

INSTRUCTIONS FOR LAYING OUT RETROFIT

SPLICE BACK TOWARD THE BRIDGE.

1. MEASURE THE APPROPRIATE "Z" DISTANCE FROM ONE END OF THE BRIDGE RAILING AND LOCATE THE FIRST EXISTING

3. REPEAT STEPS 1 AND 2, FROM OPPOSITE END OF THE BRIDGE TO OBTAIN "Y" DIMENSION.

THIS DIMENSION WILL VARY FROM 0 TO 12'-6".

2. FROM THIS SPLICE, MEASURE THE SAME "Z" DISTANCE BACK TOWARD THE BRIDGE TO OBTAIN THE "X" DIMENSION.

4. SUBTRACT THE SUM OF "X" + "Y" FROM BRIDGE RAILING LENGTH. THIS WILL BE THE BRIDGE RETROFIT LENGTH.

THE REMAINDER WILL BE THE LENGTH OF A SHORTENED ELEMENT.

5. DIVIDE THE BRIDGE RETROFIT LENGTH BY 12'-6" TO OBTAIN THE NUMBER OF BEAM ELEMENTS PLUS A REMAINDER.

IN STEP 5.

RETROFIT WILL CONTAIN TWO SHORTENED BEAM ELEMENTS WITH ONE LESS 12'-6" BEAM ELEMENT THAN CALCULATED

6. WHEN THE REMAINDER IS LESS THAN 2'-6", ADD 12'-6" TO THE REMAINDER AND DIVIDE BY TWO. THE BRIDGE

Z = 56'-3" WHEN CONNECTING TO BEAM GUARDRAIL, TYPE B. USE GUARDRAIL ANCHORAGE, BRIDGE, DETAIL A5

Z = 50'-0" WHEN CONNECTING TO BEAM GUARDRAIL, TYPE T. USE GUARDRAIL ANCHORAGE, BRIDGE, DETAIL A4

Z = 50'-0" WHEN CONNECTING TO BEAM GUARDRAIL, TYPE MGS-8. USE GUARDRAIL ANCHORAGE, BRIDGE, DETAIL A3

GUARDRAIL

* EXISTING

SPLICE *

\ EXISTING

GUARDRAIL

* EXISTING

AND A 6'-3" POST SPACING.

POSTS WITH GUARDRAIL TYPE MGS-8

BE LOCATED AT MIDSPAN BETWEEN

DIAGRAM. SPLICE LOCATION WILL

6'-3" POST SPACING DEPICTED IN

* GUARDRAIL TYPE B OR TYPE T WITH

12 GAUGE

SECTIONS

THRIE BEAM

TWO NESTED

REF. LINE

BRIDGE

(REFER TO SHEETS 1 THROUGH 3)

THRIE BEAM EXPANSION SECTION(S)

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BRIDGE RAILIN G,

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BRIDGE CURB

FRONT FACE OF

MAX.

BEAM ELEMENT

ADDED GUARDRAIL POST

REFERENCE LINE

1'-6ƒ"

PLA N OF A DDITION AL POST DETAIL

FRONT FACE OF APPROACH CURB

IMMEDIATELY ADJACENT TO STRUCTURE

BLOCK AND OFFSET BLOCK (AS SHOWN)

ELEMENT AND PLACE AN ADDITIONAL POST,

ADDITIONAL HOLES FOR POST BOLTS IN BEAM

WHEN THIS DISTANCE EXCEEDS 3'-1•", DRILL

STRUCTURE REFERENCE LINE

FOR 3'-1•" POST SPACING BEYOND

FIRST SET OF POST BOLT SLOTS

MAINTAINING REQUIRED POST SPACING.

OFFSET BLOCK WIDTH TO LOCATE POST WHILE

IT MAY BE NECESSARY TO INCREASE THE 12"

FOR BRIDGES SKEWED IN DIRECTION SHOWN,

2 SPACES (MINIMUM) @ 3'-1•" 4 SPACES (MINIMUM) @ 1'-6ƒ"

WOOD BLOCKOUTS

RAILING END POST

OPEN-PARAPET BRIDGE5"<

AS NEEDED

DEPTH

ON BLOCK

CENTER HOLES

FRON T SIDE

W OOD BLOCK OU T DETAIL

DIA. HOLES

* DRILL 1"

FOR LAG SCREW

* DRILL •" DIA. HOLE

SEPARATE

OF BLOCK MAY BE

PROJECTING PORTION

SECTION THRU 1'-10" HIGH PARAPET RAILING

PARAPET RAILING. WHERE REQUIRED, SEE

* NOTE: HOLE LOCATIONS SHOWN ARE FOR 2'-3" HIGH

COMBINATION OF SEPARATE BLOCKS

WOOD BLOCKOUTS MAY BE MADE FROM A

7‚"

MIN

.

7†

"

MIN.

HE

IGH

T A

S N

EE

DE

D

6" 1•"

9"

4"

3" DIA. x 1" DEEP COUNTERSINK

BACKWALL

EXISTING

FASCIA

SIDEWALK

EXISTING

ELEV ATION

A A

REFERENCE LINE

BRIDGE

RE

Q'D

AS

REFERENCE LINE

BRIDGE

SECTION A - A

CON CRETE RAILIN G POST DETAIL

OR FORMED)

POST (MAY BE DRILLED

\ 1" DIA. HOLES IN

#6 BARS (TYP.)

EPOXY ANCHORING

\ 9" DEEP HOLE FOR

(2'-8" LONG)

5 - #6 BARS

5"

#6 BARS

7†

"

3"

1'-6"

3"

2-EQUAL SPACES

6"

#4

TIE

BA

RS

1'-

6"

2'-

3"

3"

1'-6"

3"

2-EQUAL SPACES

3"

3"

1'-

0"

6"

2•"

3"

#4 TIE BAR

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THRIE BEAM ELEMENT

SAME CROSS SECTION AS

8•" 2"

4‚"

1'-

8"

3…"

7" 12'-6" 6‚"

4"

SLOTTED HOLES

ž " x 5"

SLOTTED HOLES

ž " x 1„"

POST BOLT SLOTS

ƒ" x 2•"

1'-6ƒ" <SPACED AT 1'-6ƒ" <

ƒ" x 3ƒ" SLOTTED HOLES

TH RIE BEA M EXPA N SION SECTION

6 6


OF

SHEET




BRIDGE RAILIN G,

10-23-2019 B-23-F


(SEE WOOD BLOCKOUT DETAIL)

DEPTH AS NEEDED

CURB

FLUSH WITH

SECTION S TH RU PA RAPET RAILIN G

MIN.

0(SEE NOTES)

WASHERS

REFLECTORIZEDNEEDED

DEPTH AS

REINFORCEMENT

TO AVOID

MAY BE ANGLED1" TO 3"

BEH IN D 6" OR 9" W IDE BRU SH BLOCK

1'-10" H IG H PA RAPET RAILIN G

BEH IN D 6" OR 9" W IDE BRU SH BLOCK


BEH IN D 1'-6" TO 2'-6" W IDE BRU SH BLOCK


WIDE BRUSHBLOCKS.

SHOWN FOR 6" OR 9"

STUDS AND LAG SCREWS AS

HEIGHT IS 1'-10", PLACE

WHERE PARAPET RAILING

2'-

10

"

6" & 9"

2'-

3ƒ

"

SQUARE WASHERS UNDER OUTSIDE NUTS.

WITH ROUND WASHERS UNDER WELDED NUTS AND

BRIDGE RAILING. \ ‡" DIA. THREADED STUDS

\ 1" DIA. HOLE IN BEAM, WOOD BLOCKOUT AND

WITH ROUND WASHER

GALVANIZED LAG SCREW

AND \ †" DIA. x 5•"

\ ƒ" DIA. HOLE IN BEAM

WITH ROUND WASHER


AND \ †" DIA. x 2•"


4"

(SEE NOTES)

WASHERS

REFLECTORIZED

HEIGHT

CURB

EXISTING

HEIGHT

CURB

EXISTING

(SEE NOTES)

WASHERS

REFLECTORIZED

HEIGHT

CURB

EXISTING

WITH ROUND WASHER


AND \ †" DIA. x 6"


WOOD BLOCKOUT

1" TO 3"

6"

6" & 9"

2'-

10"

2'-

1"

4"

1'-6" TO 2'-6"

6ƒ"

MAX.

(SEE WOOD

BLOCKOUT

DETAIL)

4"

2'-

3ƒ

"

2'-

10"

1" TO 3"

STANDARD SPLICE BOLTS.

SHALL BE ATTACHED AT UPPER POST BOLT SLOTS WITH

25'-0" INTERVALS AT BEAM ELEMENT SPLICES. THEY

REFLECTORIZED WASHERS SHALL BE SPACED AT

SECTIONS 807 & 908 OF THE STANDARD SPECIFICATIONS.

ALL WORK AND MATERIALS SHALL BE IN ACCORDANCE WTH

SHOWN ON THIS PLAN.

PLAN R-60 SERIES, WHERE APPLICABLE, EXCEPT AS

ANCHORAGES SHALL CONFORM TO THE CURRENT STANDARD

BRIDGE RAILING, THRIE BEAM RETROFIT AND GUARDRAIL

APPROACH GUARDRAIL.

EXISTING OPEN-PARAPET TYPE BRIDGE RAILINGS AND

THIS STANDARD IS INTENDED FOR USE IN UPGRADING OF

NOTES:

STANDARD.

AND LAST BLOCK ON HEADWALL AS DETAILED ON THIS

OF 10'-7ƒ" OR LESS CENTER TO CENTER. PLACE FIRST

BLOCKOUTS FOR THRIE BEAM GUARDRAIL AT A DISTANCE

FOR PRECAST THREE SIDED OR ARCH CULVERTS SPACE

MICHIGAN DESIGN MANUAL ROAD DESIGN

6.03.09 (revised 10-28-2019)

Hot Mix Asphalt (HMA) Mixture Selection Guidelines

This guide is to aid in the selection of Hot Mix Asphalt (HMA) mixtures, asphalt binders and Aggregate Wear Index values. It is the ultimate responsibility of the Region Soils/Materials Engineer to provide appropriate hot mix asphalt and thickness recommendations. Any questions regarding these guidelines should be addressed to either the HMA Unit or the Pavement Design Engineer in the Construction Field Services Division.

A. Rehabilitation, Reconstruction (R&R) and New Construction Projects

1. Mainline Paving

a) Mixture Selection

All mainline paving shall be composed of Superpave mixtures.

Computed Design BESAL’s (HMA Equivalent Single Axle Load) will be used to identify the appropriate Superpave mixture type.

6.03.09A1a (continued)

Superpave Mix Type

Design BESAL (millions)

E03/LVSP Less than 0.3

E1 Between 0.3 and 1.0





GGSP Between 10.0 and 100.0

GGSP is to only be used as a top course mixture.

Design BESAL’s are calculated using the following information:

Commercial Traffic Traffic Growth Rate Lane Distribution of Commercial Traffic BESAL Axle Load Equivalency for Flexible

Pavement Total accumulated BESAL’s for 20 year

design

The method for calculating ESAL’s for flexible pavements (BESAL’s) is explained in the AASHTO Guide for Design of Pavement Structures, 1993. Design BESAL’s should be requested from the Project Planning Section of the Project Planning Division. The Pavement Design Engineer of the Pavement Management Section of the Construction Field Services Division can provide an approximate BESAL value (for estimating purposes only). Show the 20 year design BESAL’s on the design plans.

b) Superpave Mixture Number Designation and Thickness Guidelines

After mixture selection has been determined, based on design BESAL’s, the mixture number for use in the various pavement courses can be determined. The mixture number will be 2, 3, 4 or 5 depending on the nominal maximum size aggregate. Following are the mixture numbers, minimum/maximum application rates and course type application:


6.06.06C (continued)

Criteria for Use

Detail F - Detail F curb and gutter may be used where a high profile mountable curb is desired and the design speed is 50 mph (45 mph posted) or less. Typical usage would be in areas where Detail C curb and gutter is being replaced or where Detail B or Detail D curb and gutter would not yield sufficient roadside control.

Detail G - Detail G curb and gutter is to be used on urban freeways. See Section 6.06.10.

D. Unlighted Areas

Generally speaking, it is undesirable to introduce or to use a curb, immediately adjacent to the roadway, in unlighted areas.

6.06.07

Deleted

6.06.08 (revised 10-28-2019)

Bridge Approach Curb and Gutter

The type, length, and method of drainage at bridge approaches is the responsibility of the bridge designer. The quantities, however, are included in the road plans when road plans are involved.

The designer will need to meet the design spread requirements in the Drainage Manual, including 100% capture (no bypass flows) during the design event at locations where the curbing ends at the approaches to reduce the risk of erosion of the road embankment. The actual spacing and type of drainage capture device (downspout, catch basin, spillway) will be site specific.

Following is a guide to the use of the bridge approach curb and gutter details shown on Standard Plan R-32-Series with a 4” maximum curb height. It should be emphasized that this criteria is only a guide and that the designer should use engineering judgement in determining the type of structure to use.

Detail 5 - Used on the high ends of bridges where the bridge runoff drains toward the bridge or on the departing ends of bridges when guardrail is not needed.

Detail 6 (and 6A) - Used on the low ends of bridges where moderate amounts of drainage area are involved and fills are less than 10’ high.

Detail 7 (and 7A) - Used on the low ends of bridges where greater amounts of drainage may be expected and in fills greater than 10’ high. One downspout header should be provided for each 3500 sft (approximately) of paved runoff areas or fraction thereof. If it is not readily apparent whether to use Detail 6 or Detail 7, use Detail 7.

If the bridge railing is other than the standard shape, the approach curb and gutter should be modified or transitioned to fit the bridge curb.


6.06.08 (continued)

Bridge Approach Curb and Gutter

The detail and length of Bridge Approach Curb and Gutter should be shown on the plans, and will be paid for as "Curb and Gutter, Bridge Approach" per foot. The length of the Bridge Approach Gutter, used when the bridge barrier railing extends beyond the pavement seat on bridge, is included in the “Curb and Gutter, Bridge Approach” pay item. The concrete spillway is paid for as a continuation of Bridge Approach Curb and Gutter Detail 6 or 6A. The downspout header in Details 7 or 7A is paid for separately, although the pay length for Detail 7 or 7A includes the length occupied by the downspout header.

6.06.09

Concrete Valley Gutter

Michigan's use of valley gutter goes back to 1968, when it was created in response to an FHWA insistence on flush shoulders on freeways. Initially, it was located where curb and gutter had been used previously, between the travel lanes and the paved shoulder. More recent practice, and that used currently, places the valley gutter on the outside of the shoulder, adjacent to concrete median barrier, if there is one. On the outside, it would be placed adjacent to single face barrier. When there is no concrete barrier on the outside, concrete curb and gutter, or one of the urban freeway curbs, should be used in place of the valley gutter.

6.06.10

Urban Freeway Curb

Standard Plan R-33-Series illustrates an urban freeway curb and gutter, and a concrete valley gutter. Application of these curb details is as follows:

Detail G1 - Detail G1 curb and gutter is designed to be used on urban freeways and is to be placed only in cut sections and in front of retaining walls. This curb is to be placed on the outside edge of shoulder to reduce the potential of earth to slough onto the shoulder and also to control drainage. Use Cover W, Standard Plan R-23-Series or any drainage structure cover designed to fit a 24” gutter pan.

Detail G2 - Detail G2 is similar to Detail G1, except the wider gutter pan allows the use of Cover V, as on Standard Plan R-22-Series.

These urban curb details may be used in other situations when approved.

6.06.11

Integral Curb

See Standard Plan R-31-Series.

Unless otherwise specified in the plans or proposal, the contractor may cast curb or curb and gutter integrally with concrete pavement, at his option. Integral curb has the advantage of eliminating a longitudinal joint and the attendant possibility of water leakage into the subgrade. If widening of the pavement is in the foreseeable future, the integral option should be prohibited. Generally, it would not be used with concrete base course. Designers are cautioned not to inadvertently prohibit the construction of integral curb by failing to list Standard Plan R-31-Series on the note sheet.

ROAD DESIGN MANUAL ROAD DESIGN

7.01.16 (revised 10-28-2019)

Guardrail Attachment to Bridges and Walls

The following guardrail anchorage details are in current use for new construction and where specified for upgrading and are detailed on Standard Plans R-67-Series, B-22-Series, B-23-Series:

A. Guardrail Anchorage, Bridge, Details M1 & M4 (See Standard Plan R-67-Series)

Current Use:When connecting Guardrail, Type MGS-8 to Bridge Railing, 2-Tube, 4-Tube, Aesthetic Parapet Tube, 3 Tube with Pickets, Concrete Block Retrofit, Type 6, Type 7, or Single Face Concrete Barrier without expansion at backwall (M1) or with expansion at backwall (M4).

B. Guardrail Anchorage, Bridge, Details M2 & M5 (See Standard Plan R-67-Series)

Current Use: When connecting Guardrail, Type T to Bridge Railing, 2-Tube, 4-Tube, Aesthetic Parapet Tube, 3 Tube with Pickets, Concrete Block Retrofit, Type 6, Type 7, or Single Face Concrete Barrier without expansion at backwall (M2) or with expansion at backwall (M5).

C. Guardrail Anchorage, Bridge, Details M3 & M6 (See Standard Plan R-67-Series)

Current Use: When connecting Guardrail, Type B to Bridge Railing, 2-Tube, 4-Tube, Aesthetic Parapet Tube, 3 Tube with Pickets, Concrete Block Retrofit, Type 6, Type 7, or Single Face Concrete Barrier without expansion at backwall (M3) or with expansion at backwall (M6).

7.01.16 (continued)

D. Guardrail Anchorage, Bridge, Details M7, M8 & M9 (See Standard Plan R-67-Series)

Current Use: When connecting Guardrail, Type MGS-8 (M7), Type T (M8) or Type B (M9) to Filler Wall.

E. Guardrail Anchorage, Bridge, Detail A3 (See Standard Plans B-22-Series and B-23-Series)

Current Use:When connecting Guardrail, Type MGS-8 to Bridge Railing, Thrie Beam Retrofit.

F. Guardrail Anchorage, Bridge, Detail A4 (See Standard Plans B-22-Series and B-23-Series)

Current Use: When connecting Guardrail, Type T to Bridge Railing, Thrie Beam Retrofit.

G. Guardrail Anchorage, Bridge, Detail A5 (See Standard Plans B-22-Series and B-23-Series)

Current Use: When connecting Guardrail, Type B to Bridge Railing, Thrie Beam Retrofit.

H. Need for Additional Expansion

The Guardrail Anchorage, Bridge details on Standard Plan R-67-Series will accommodate thermal deck movement up to about 4". If the expected thermal deck movement will exceed 4", the Road designer should consult with the Bridge designer to decide the method for providing the additional expansion required in the guardrail.

MICHIGAN DESIGN MANUAL BRIDGE DESIGN

7.03.09 (continued)

Piles

A. General

8. Pile Batter

Generally, piles are to be battered no flatter than 3V:1H. Where soil conditions are not good enough to provide sufficient lateral pile resistance, we may increase the angle of batter to 2.5V:1H or even 2V:1H. This measure, however, should be a last resort since it is difficult to maintain driving accuracy when the batter is flatter than 3V:1H.

If a 2.5V:1H or 2V:1H batter is shown on the plans, note 8.06.05 G must be added to the plans.

9. Cast-in-Place Concrete Pile Shells

The minimum pile shell thickness shall be 0.312”. (8-20-2012)

10. Pile Numbering

A pile numbering scheme shall be shown on the plans for those units having piles. Each pile shall be assigned a number in a particular row or on an individual basis.

11. Pile Driving Vibration Evaluation (11-28-2011)

Driven piles located within a distance of 100 ft of historic or vibration sensitive structures shall be evaluated for damage potential from vibration and/or vibration induced settlement.

Driven piles shall not be located within a 25 ft radius of existing spread footings, critical utilities, or in-service pavements without mitigation and/or vibration and settlement monitoring specifications.

12. Loads Applied to Piles

Piles are to be designed for compression, shear, and/or moment loads only. Piles are not to be designed for tension loads unless approved by the MDOT Geotechnical Services Section.

(10-28-2019)

7.03.09 (continued)

B. Pile Capacity

In general, the specified capacity shown on the plans and used in the substructure design should be 60 tons. In some cases, the soil profile will indicate that a higher or lower specified capacity would be more economical. The recommendation from the Geotechnical Services Section will indicate what pile capacity to use. (2-26-2018)

1. Steel H Piles

The maximum design load on steel H piles shall not exceed the following:

HP 8x36 45 tons

HP 10x42 55 tons

HP 12x53 70 tons

HP 14x73 95 tons

2. Cast-in-Place Concrete Piles

The maximum design load on cast-in-place concrete piles shall not exceed the following:

10¾" O.D. 45 tons

12" O.D. 65 tons

12¾” O.D. 75 tons

14" O.D. 90 tons

MICHIGAN DESIGN MANUAL BRIDGE DESIGN - CHAPTER 7: LRFD

7.03.09 (continued)

Piles

A. General

4. Test Piles

Test piles are to be provided for all projects using piles unless the Geotechnical Services Section determine that they are not necessary. (2-26-2018)

At least two test piles shall be provided for at each substructure unit placed on piles.

Timber test piles shall be located in a manner that will best serve as a basis for ordering the balance of the piles.

5. Pile Embedment

Piles are to be extended into the footing a distance of 6". When a tremie seal is used, the piles are to be extended into the footing a distance of 1'-0".

6. Concrete Displaced by Piles

No deductions in concrete quantities will be made for steel pile embedments or for pipe pile embedments of 1'-0" or less.

7. Edge Distance

The usual minimum edge distance for piles is 1'-6". This may be reduced to 1'3" where special conditions require.

8. Abutment Piling

When piling is required for abutments, a careful study should be made to ensure that the piling will clear previously placed or proposed culvert pipe.

7.03.09 (continued)

9. Pile Batter

Generally, piles are to be battered no flatter than 3V:1H. Where soil conditions are not good enough to provide sufficient lateral pile resistance, we may increase the angle of batter to 2.5V:1H or even 2V:1H. This measure, however, should be a last resort since it is difficult to maintain driving accuracy when the batter is flatter than 3V:1H.

10. Pile Numbering

A pile numbering scheme shall be shown on the plans for those units having piles. Each pile shall be assigned a number in a particular row or on an individual basis.

11. Lateral Pile Resistance (8-20-2009)

Lateral pile resistance as determined by a Geotechnical Engineer may be used to resist horizontal forces on substructure. See AASHTO LRFD Bridge Design Specification 10.7.

Scour potential for the structure shall be accounted for when the Geotechnical Engineer determines nominal horizontal pile resistance.

12. Pile Driving Vibration Evaluation (11-28-2011)

Driven piles located within a distance of 100 ft of historic or vibration sensitive structures shall be evaluated for damage potential from vibration and/or vibration induced settlement.

Driven piles shall not be located within a 25 ft radius of existing spread footings, critical utilities, or in-service pavements without mitigation and/or vibration and settlement monitoring specifications.

13. Loads Applied to Piles

Piles are to be designed for compression, shear, and/or moment loads only. Piles are not to be designed for tension loads unless approved by the MDOT Geotechnical Services Section.

(10-28-2019)

MICHIGAN DESIGN MANUAL BRIDGE DESIGN

7.03.13

Drilled Shafts (3-26-2018)

Due to relative ease of construction and economy, driven piles are generally preferred for most deep bridge foundations. For unique structures with high vertical or lateral loads, limited footprint, or at sites with deep scour, shallow rock or hardpan, or where foundations are to be built adjacent to vibration sensitive structures, drilled shaft foundations may be appropriate. Drilled shafts are most ideal for sites where short, permanently cased shafts can be socketed into rock or hard pan.

Feasibility of drilled shafts for bridge foundations is subject to the approval of the MDOT Foundation Analysis Engineer. Guidelines used for feasibility evaluation follow:

A. Avoid use of drilled shafts if soil boring logs indicate the presence of gas pockets, artesian/confined aquifers, or nested cobbles/boulders.

B. Shafts up to 50 feet in length, bearing in hard pan or rock, are acceptable. Longer shafts are difficult to case and should be avoided with one possible exception; that being sites where deep lacustrine clay overlies hardpan or rock.

C. Due to increased construction risk, avoid uncased shafts in the drift. Permanent casing, sealed into the competent strata below the drift, is the preferred construction scenario. Temporary cased or uncased designs will be evaluated based on the merits of the site and typical contractor tooling.

7.03.13 (continued)

D. In the absence of a site specific load test program, shafts must be sized such that the full factored geotechnical resistance, is derived from either shaft resistance or end resistance.

1. Friction shafts must develop the full factored vertical side resistance in hardpan and/or rock.

2. End-bearing shafts must be sized such that the full factored vertical resistance is derived from end- bearing on rock or hard pan.

E. Belled drilled shafts are prohibited.

F. Drilled shafts in gas bearing formations are prohibited.

G. Drilled shafts are to be designed for compression, shear, torsion, and/or moment loads only. Drilled shafts are not to be designed for tension loads unless approved by the MDOT Geotechnical Services Section. (10-28-2019)

Contact MDOT’s Geotechnical Services Section with questions.

MICHIGAN DESIGN MANUAL BRIDGE DESIGN - CHAPTER 7: LRFD

7.03.13

Drilled Shafts (3-26-2018)

Due to relative ease of construction and economy, driven piles are generally preferred for most deep bridge foundations. For unique structures with high vertical or lateral loads, limited footprint, or at sites with deep scour, shallow rock or hardpan, or where foundations are to be built adjacent to vibration sensitive structures, drilled shaft foundations may be appropriate. Drilled shafts are most ideal for sites where short, permanently cased shafts can be socketed into rock or hard pan.

Feasibility of drilled shafts for bridge foundations is subject to the approval of the MDOT Foundation Analysis Engineer. Guidelines used for feasibility evaluation follow:

A. Avoid use of drilled shafts if soil boring logs indicate the presence of gas pockets, artesian/confined aquifers, or nested cobbles/boulders.

B. Shafts up to 50 feet in length, bearing in hard pan or rock, are acceptable. Longer shafts are difficult to case and should be avoided with one possible exception; that being sites where deep lacustrine clay overlies hardpan or rock.

C. Due to increased construction risk, avoid uncased shafts in the drift. Permanent casing, sealed into the competent strata below the drift, is the preferred construction scenario. Temporary cased or uncased designs will be evaluated based on the merits of the site and typical contractor tooling.

7.03.13 (continued)

D. In the absence of a site specific load test program, shafts must be sized such that the full factored geotechnical resistance, is derived from either shaft resistance or end resistance.

1. Friction shafts must develop the full factored vertical side resistance in hardpan and/or rock.

2. End-bearing shafts must be sized such that the full factored vertical resistance is derived from end- bearing on rock or hard pan.

E. Belled drilled shafts are prohibited.

F. Drilled shafts in gas bearing formations are prohibited.

G. Drilled shafts are to be designed for compression, shear, torsion, and/or moment loads only. Drilled shafts are not to be designed for tension loads unless approved by the MDOT Geotechnical Services Section. (10-28-2019)

Contact MDOT’s Geotechnical Services Section with questions.

Road & Bridge Design Publications · 2019-10-29 · Road & Bridge Design Publications Monthly...

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