Virginia (VDOT) Drainage Inlets

PCVDOT2019A

Virginia Drainage Inlets

Use

Precast drainage inlets are typically used for storm drain systems in lieu of built in place

inlets.

Sizes

Precast drainage inlets are available in many sizes from small area drains to large inlets or

combination inlet / junction boxes, both in rectangular designs as well as circular structures

with diameters of 36 inch through 144 inch.

Application

Precast drainage inlets may be used for the following:

Yard Inlets

Curb Inlets

Catch Basins

Drop Inlets

Area Drains

Traffic areas

Parking lots

Median inlets

Joints

The following joints may be available for precast drainage inlets:

pre-formed mastic or butyl gasket

Mortar joints

Applicable Specifications

The following specifications apply to Virginia precast drainage inlets:

ASTM C478 / AASHTO M199 - Precast Reinforced Concrete Manhole Sections

ASTM C 913 - Precast Concrete Water and Wastewater Structures

ASTM C990 - Joints for Concrete Pipe, Manholes, and Precast Box Sections Using Preformed

Flexible Joint Sealants

Virginia Department of Transportation standards and specifications

TITLE

09-24-18

DATE

Precast DI-1 & 1A Inlet Square & Round Top

Assembly Diagram

Virginia Drainage Structures

20190102TED03

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

Riser

Intermediate Landing

DI-1

(4'-10" Sq)

DI-1A

(5'-4" Sq)

DI-1

(48"Ø to 144"Ø Round)

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

A A

B B

TITLE

09-12-18

DATE

Precast DI-1 & 1A Inlet Round Top

for 48"Ø to 144"Ø Manholes

Virginia Drainage Structures

20190102TED02

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

Section View A-A

Plan View

(48"Ø)

Isometric View

Plan View

(60"Ø to 144"Ø)

Section View B-B

Isometric View

26"

Opg

26"

Opg

6"

8"

VDOT Std DI-1

Frame & Grate Cast-In

VDOT Std DI-1

Frame & Grate Cast-In

A A

B B

TITLE

09-12-18

DATE

Precast DI-1 & 1A Inlet Square Top

Virginia Drainage Structures

20190102TED01

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) 4'-10" top used for 48"Ø manholes; 5'-4" top used for 48"Ø & 60"Ø manholes.

Section View A-A

Plan View

(4'-10" Sq)

Isometric View

Plan View

(5'-4" Sq)

Section View B-B

Isometric View

4'-10"

4'-10"

26"

Opg

Interlock Groove

for 48"Ø Manhole

6" 6"

26"

Opg

Interlock Groove

for 48"Ø or 60"Ø Manhole

5'-4"

5'-4"

VDOT Std DI-1

Frame & Grate Cast-In

VDOT Std DI-1

Frame & Grate Cast-In

TITLE

10-15-18

DATE

Precast DI-2ABC & DEF Inlet

Assembly Diagram

Virginia Drainage Structures

20190102TED18

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

Riser

Intermediate Landing

DI-2ABC

(Right Throat Shown)

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

DI-2DEF

(Right Throat Shown)

Transition Flattop

Transition Flattop

TITLE

10-15-18

DATE

Precast DI-2ABC & DEF Inlet Round & Box

Assembly Diagram

Virginia Drainage Structures

20190102TED19

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

Riser

Intermediate Landing

DI-2ABC

(Right Throat Shown)

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

DI-2DEF

(Right Throat Shown)

Transition Flattop

Transition Flattop

Inlet Box

Top Slab

Top Slab

Inlet Box

TITLE

09-26-18

DATE

Precast DI-2ABC Inlet Round

Virginia Drainage Structures

20190102TED14

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Manhole sections conform to ASTM C478/ AASHTO M199.

4) Throat opening maybe shifted for right, left, or center Inlets.

5) VDOT standard ST-1 steps provided @ 16"CC, aligned vertically for structures with depth of 4'-0" or greater.

6) Throat Length Varies 2'-2" or 4'-0" to 20'-0" in 2'-0" Increments.

Pipe Openings

As Required

Standard Manhole Base

DI-2ABC Transition Flattop

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

5

8" Ø Dowel Holes

VDOT DI-2

Frame & Grate Cast-In

(Grate Not Shown for Clarity)

3"Ø Weep Hole

Grate Unit for

Round or Box Base

As Required

Keyway

Throat Unit "A" or "B" Nosing

Throat Length Varies 2'-2" or 4'-0" to

20'-0" in 2'-0" Increments.

As Required

TITLE

09-27-18

DATE

Precast DI-2ABC Inlet Box

Virginia Drainage Structures

20190102TED15

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Rectangular sections conform to ASTM C890 and C913.

4) Throat opening maybe shifted for right, left, or center Inlets.

5) VDOT standard ST-1 steps provided @ 16"CC, aligned vertically for structures with depth of 4'-0" or greater.

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

VDOT DI-2

Frame & Grate Cast-In

(Grate Not Shown for Clarity)

Throat Unit "A" or "B" Nosing

Throat Length Varies 2'-2" or 4'-0" to

20'-0" in 2'-0" Increments.

As Required

Keyway

Grate Unit for

Round or Box Base

As Required

5

8" Ø Dowel Holes

DI-2ABC Top Slab

3"Ø Weep Hole

3"Ø Weep Hole

Dowel Holes

DI-2ABC Inlet Box

4

1

2

"

8

'

-

0

"

M

a

x

8

"

7

"

Pipe Openings

As Required

TITLE

09-25-18

DATE

Precast DI-2ABC Throat Unit

Virginia Drainage Structures

20190102TED10

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Throat openings may be shifted for right, left, or center Inlets.

Elevation View

(Right Throat Shown)

Isometric View

("A" Nosing Throat)

Section View

("A" Nosing Throat)

Elevation View

(Right Throat Shown)

Section View

("B" Nosing Throat)

Isometric View

("B" Nosing Throat)

2'-0"

16"

2'-0"

5

1

2

" 1

2

"

Throat Length Varies

2'-2" or 4'-0" to 20'-0" in 2'-0" Increments

26" Opg

6"

8"

45°

5

8" Ø Dowel Holes

6"R

12"

6"

Keyway

Angle Iron

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

2'-0"

2'-0"

16"

8"

5

1

2

"

1

2

"

26" Opg 8"

12"

6"

6"Throat Length Varies

2'-2" or 4'-0" to 20'-0" in 2'-0" Increments

8"

8" 8"

5

8" Ø Dowel Holes

6"R

Keyway

Angle Iron

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

TITLE

09-25-18

DATE

Precast DI-2ABC ("A" Nosing) Throat Unit

Virginia Drainage Structures

20190102TED08

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Throat openings may be shifted for right, left, or center Inlets.

Elevation View

(Right Throat Shown)

Isometric View

Section View

("A" Nosing Throat)

2'-0"

16"

2'-0"

8" 8"

5

1

2

"

1

2

"

Throat Length Varies

2'-2" or 4'-0" to 20'-0" in 2'-0" Increments

26" Opg

6"

8"

45°

5

8" Ø Dowel Holes

6"R

12"

6"

Keyway

Angle Iron

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

TITLE

09-25-18

DATE

Precast DI-2ABC ("B" Nosing) Throat Unit

Virginia Drainage Structures

20190102TED09

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Throat openings may be shifted for right, left, or center Inlets.

Elevation View

(Right Throat Shown)

Isometric View

Section View

("B" Nosing Throat)

2'-0"

16"

2'-0"

8" 8"

5

1

2

"

1

2

"

Throat Length Varies

2'-2" or 4'-0" to 20'-0" in 2'-0" Increments

26" Opg

6"

8"

12"

6"

Angle Iron

5

8" Ø Dowel Holes

6"R

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

Keyway

TITLE

09-26-18

DATE

Precast DI-2ABC Grate Unit for Round Base

Virginia Drainage Structures

20190102TED05

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

Elevation View

Isometric View

Section View

(For "A" Nosing Round Base)

Section View

(For "B" Nosing Round Base)

VDOT DI-2

Frame & Grate Cast-In

2

6

"

O

p

g

22"

12"

1

2

"

18"

18"

2'-2"

7"

3"Ø Weep Hole

20"

7"

18"

2'-2"

10"

1

2

"

16"

3"Ø Weep Hole

3'-6"

8"

26" Opg

TITLE

09-26-18

DATE

Precast DI-2ABC Grate Unit for Box Base

Virginia Drainage Structures

20190102TED04

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

Elevation View

Isometric View

Section View

(For "A" Nosing Box Base)

Section View

(For "B" Nosing Box Base)

3'-6"

8"

17

1

2

"

7"

12"

1

2

"

13

1

2

"

2'-2"

18"

26" Opg

15

1

2

"

7"

18"

2'-2"

10"

1

2

"

11

1

2

"

3"Ø Weep Hole

3"Ø Weep Hole

2

6

"

O

p

g

VDOT DI-2

Frame & Grate Cast-In

TITLE

09-27-18

DATE

Precast DI-2DEF Inlet Round

Virginia Drainage Structures

20190102TED16

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Manhole sections conform to ASTM C478/ AASHTO M199.

4) Throat opening maybe shifted for right, left, or center Inlets.

5) VDOT standard ST-1 steps provided @ 16"CC, aligned vertically for structures with depth of 4'-0" or greater.

6) Throat Length Varies 4'-8" or 6'-0" to 20'-0" in 2'-0" Increments.

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

5

8" Ø Dowel Holes

DI-2DEF Transition Flattop

3"Ø Weep Hole

Pipe Openings

As Required

Standard Manhole Base

(60'' Ø Minimum)

Grate Unit for

Round or Box Base

As Required

Keyway

Throat Unit "A" or "B" Nosing

Throat Length Varies 4'-8" or 6'-0" to

20'-0" in 2'-0" Increments.

As Required

VDOT DI-2

Frame & Grate Cast-In

TITLE

09-27-18

DATE

Precast DI-2DEF Inlet Box

Virginia Drainage Structures

20190102TED17

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Rectangular sections conform to ASTM C890 and C913.

4) Throat opening maybe shifted for right, left, or center Inlets.

5) VDOT standard ST-1 steps provided @ 16"CC, aligned vertically for structures with depth of 4'-0" or greater.

6) Throat Length Varies 4'-8" or 6'-0" to 20'-0" in 2'-0" Increments.

4

1

2

"

8

"

9

"

8

'

-

0

"

M

a

x

3"Ø Weep Hole

5

8" Ø Dowel Holes

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

VDOT DI-2

Frame & Grate Cast-In

Throat Unit "A" or "B" Nosing

Throat Length Varies 4'-8" or 6'-0" to

20'-0" in 2'-0" Increments.

As Required

Keyway

Grate Unit for

Round or Box Base

As Required

DI-2DEF Top Slab

3"Ø Weep Hole

DI-2DEF Inlet Box

Dowel Holes

Pipe Openings

As Required

TITLE

09-25-18

DATE

Precast DI-2DEF Throat Unit

Virginia Drainage Structures

20190102TED13

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Throat openings may be shifted for right, left, or center Inlets.

Elevation View

(Right Throat Shown)

Isometric View

("A" Nosing Throat)

Section View

("A" Nosing Throat)

Elevation View

(Right Throat Shown)

Section View

("B" Nosing Throat)

Isometric View

("B" Nosing Throat)

2'-0"

16"

2'-0"

5

1

2

"

1

2

"

Throat Length Varies

4'-8" or 6'-0" to 20'-0" in 2'-0" Increments

56" Opg

6"

8"

12"

6"

2'-0"

2'-0"

16"

8"

5

1

2

"

1

2

"

56" Opg 8"

12"

6"

6"Throat Length Varies

4'-8" or 6'-0" to 20'-0" in 2'-0" Increments

8"

8" 8"

Angle Iron

Angle Iron

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

6"R

6"R

5

8" Ø Dowel Holes

5

8" Ø Dowel Holes

TITLE

09-25-18

DATE

Precast DI-2DEF ("A" Nosing) Throat Unit

Virginia Drainage Structures

20190102TED11

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Throat openings may be shifted for right, left, or center Inlets.

Elevation View

(Right Throat Shown)

Isometric View

Section View

("A" Nosing Throat)

2'-0"

16"

2'-0"

8" 8"

5

1

2

"

1

2

"

Throat Length Varies

4'-8" or 6'-0" to 20'-0" in 2'-0" Increments

56" Opg

6"

8"

12"

6"

5

8" Ø Dowel Holes

6"R

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

Keyway

Angle Iron

45°

TITLE

09-25-18

DATE

Precast DI-2DEF ("B" Nosing) Throat Unit

Virginia Drainage Structures

20190102TED12

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Throat openings may be shifted for right, left, or center Inlets.

Elevation View

(Right Throat Shown)

Isometric View

Section View

("B" Nosing Throat)

2'-0"

16"

2'-0"

8" 8"

5

1

2

"

1

2

"

Throat Length Varies

4'-8" or 6'-0" to 20'-0" in 2'-0" Increments

56" Opg

6"

8"

12"

6"

Angle Iron

5

8" Ø Dowel Holes

6"R

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

Keyway

TITLE

09-26-18

DATE

Precast DI-2DEF Grate Unit for Round Base

Virginia Drainage Structures

20190102TED07

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

Elevation View

Isometric View

Section View

(For "A" Nosing Round Base)

Section View

(For "B" Nosing Round Base)

VDOT DI-2

Frame & Grates Cast-In

5

6

"

O

p

g

6'-0"

8"

56" Opg

2'-2"

2'-2"

18"

18"

7"

7"

22"

20"

3"Ø Weep Hole

3"Ø Weep Hole

12"

1

2

"

18"

10"

1

2

"

16"

TITLE

09-26-18

DATE

Precast DI-2DEF Grate Unit for Box Base

Virginia Drainage Structures

20190102TED06

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

Elevation View

Isometric View

Section View

(For "A" Nosing Box Base)

Section View

(For "B" Nosing Box Base)

VDOT DI-2

Frame & Grates Cast-In

5

6

"

O

p

g

6'-0"

8"

56" Opg

13

1

2

"

12"

1

2

"

2'-2"

18"

17

1

2

"

7"

3"Ø Weep Hole

3"Ø Weep Hole

10"

1

2

"

11

1

2

"

15

1

2

"

7"

18'

2'-2"

TITLE

10-16-18

DATE

Precast DI-3, 4 Top Unit

Assembly Diagram

Virginia Drainage Structures

20190102TED22

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

Riser

Intermediate Landing

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

DI-3, 4

Flattop 2pc CollarFlattop Collar

Adjustment Ring

Face Block

Throat Section

VDOT Std IC-2

Frame & Cover

TITLE

10-09-18

DATE

Precast DI-3, 4 Throat Section Top Unit

Virginia Drainage Structures

20190102TED21

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Throat Face Block poured as separate piece, contractor to install in field.

4) Opening and weep hole centered or may be shifted for left or right when L is greater than 4'-0".

Elevation View

(Throat Face Block Not Shown for Clarity)

Isometric View

("A" Nosing)

Section View

("A" Nosing-LA)

Plan View

("A" Nosing)

Section View

("B" Nosing-LA)

Elevation View

(Throat Face Block Not Shown for Clarity)

L6" 6"

VDOT Std IC-2

Frame & Cover Cast-In

Angle Iron

Angle Iron

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

5

8" Ø Dowel Holes

for Adjacent Concrete

2'-0"

2'-10"

2'-10"

2'-0"

3'-0"

3'-0"

6"

6"

5

1

2

"

3

1

2

"

Type B Face Block

Type A Face Block

Keyway

Weep Hole Notch

20"x30" or 20"Ø Opening

20"x30" or 20"Ø Opening

1" Interlock Groove

1" Interlock Groove

See Note (4)

6"

6"

TITLE

10-09-18

DATE

Precast DI-3, 4 Throat Face Blocks

(LA & LH)

Virginia Drainage Structures

20190102TED20

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) LA=Legacy Americast forms; LH=Legacy Hanson forms.

Plan View

("A" Nosing-LA Shown)

Section View

("A" Nosing Throat-LA)

Section View

("B" Nosing Throat-LA)

Elevation View

("B" Nosing Throat-LH)

Elevation View

("A" Nosing Throat-LH)

Section View

("A" Nosing Throat-LH)

Section View

("B" Nosing Throat-LH)

Elevation View

("A" Nosing Throat-LA)

Elevation View

("B" Nosing Throat-LA)

L

1

1

2

"

14"

9

1

2

"

6"

2"

6"

13

1

2

"

12"

6"

6

1

2

"

1

2

"

1"

1"

2

1

2

"6"

12"

1"

3

1

2

"

1"

6" 2

1

2

"

TITLE

10-09-18

DATE

Precast Shallow DI-3, 4 Curb Inlet

Virginia Drainage Structures

20190102TED23

Elevation View

("B" Nosing)

Isometric View

("B" Nosing)

Section View

("A" Nosing Top Slab)

Section View

("B" Nosing)

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Rectangular sections conform to ASTM C890 and C913.

4) Throat and gutter pan to be poured in the field by others.

5) VDOT standard ST-1 steps provided @ 16"CC, aligned vertically for structures with

depth of 4'-0" or greater.

6) Extended base provided at manufacturer's option.

7) Non-traffic loading only.

VDOT Std IC-2

Frame & Cover Cast-In

Dimensions

L T

2'-6" to 12'-0" 6" Min

> 12'-0" 8"

L-Varies

2'-6" to 20'-0"

T T

Varies

7'-4" Max

3

4

" Interlock

8"

2"

T

1'-6"

2

1

2

"

See Note(6)

5

8" Ø

Dowel Holes

3"Ø Weep Hole

2

1

2" x 2

1

2" x

1

2" Angle Iron

w/4" x

1

2"Ø Shear Stud 3'-6" CC Max

Galvanized after Welding ASTM A-123

Varies

Varies

2'-0" to 6'-6"

T T

Angle Iron

Angle Iron

3

4

"

Interlock

Pipe Openings

As Required

Top Slab

Base

TITLE

10-16-18

DATE

Precast DI-5 Inlet Top

Assembly Diagram

Virginia Drainage Structures

20190102TED25

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

3) DI-5 top can set directly on 48"Ø or 60"Ø manholes.

Riser

Intermediate Landing

DI-5

(Type A)

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

DI-5

(Type B & E)

5

8" Ø Dowel Holes

for Adjacent Concrete

VDOT Std DI-5

Frame & Grate Cast-In

TITLE

10-10-18

DATE

Precast DI-5 Inlet Tops

Virginia Drainage Structures

20190102TED24

Notes

1) This design is intended for precast

structures produced by CP&P only.

2) Concrete compressive strength

4,000 psi minimum.

3) DI-5 top used for 48"Ø & 60"Ø manholes.

Section View

(Type A)

Plan View

(Type A)

Isometric View

(Type A)

Plan View

(Type B & E)

Section View

(Type B & E)

Isometric View

(Type B & E)

Detail View

(Grate Bar Spacing)

Interlock

Groove

for 48"Ø or

60"Ø Manhole

5'-4"

5'-4"

5'-4"

5'-4"

36"Opg

3'-4"

Grate

Type III

Spacing

Type I

Spacing

3

8

"

2"

1

1

2

"

3"

W4

W3

1"

1"

36"Opg

3'-11"

X

D2

D

D1

Z

W2

W1

3'-4"

Grate

36"Opg

36"Opg

3'-11"

D1

X

D

D2

Z

W1

W2

Interlock

Groove

for 48"Ø or

60"Ø Manhole

Cover Dimensions and Quantities (*=1/2" Tolerance)

PG-2A Type

W1 W2 W3 W4 D* D1 D2 X Z

A1, A2, A3

3'-0

1

2

" 2'-0

3

4

" 2'-0

5

16

" 1'-0

3

8

" 6" 4" 4" 14" 2'-2"

B1, B2, B3,

B4, C1, C2, C3

2'-9" 2'-9" 1'-6

9

16

" 1'-6

9

16

" 8" 4

1

2

" 4

1

2

" 16" 2'-8"

E 2'-3" 2'-3" 1'-8

1

16

" 1'-8

1

16

" 12" 8

7

8

" 8

7

8

" 19" 2'-8"

10" 10"

Grate Not

Shown for Clarity

VDOT Std DI-5

Frame & Grate Cast-In

5

8" Ø Dowel Holes

for Adjacent Concrete

TITLE

10-17-18

DATE

Precast DI-7 Inlet Top

Assembly Diagram

Virginia Drainage Structures

20190102TED27

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

3) DI-7 top can set directly on 48"Ø or 60"Ø manholes.

Riser

Intermediate Landing

DI-7

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

VDOT Std DI-7

Frame & Grate Cast-In

TITLE

10-17-18

DATE

Precast DI-7 Inlet Top

Virginia Drainage Structures

20190102TED26

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Contractor to consult VDOT DI-7 standard for grate details and installation details.

4) Taper to prevent settlement of adjacent cast-in-place concrete.

5) DI-7 top used for 48"Ø & 60"Ø manholes.

Section View

Plan View

Isometric View

5'-8"

5'-4"

5'-8" 5'-4"

36" Opg

36"Opg

8"

2" See Note (4)

2"

10"

Interlock Groove

for 48"Ø or 60"Ø Manhole

VDOT Std DI-7

Frame & Grate Cast-In

TITLE

11-01-18

DATE

Precast DI-10GHI & DI-14ABC Type I & II

Inlet Tops Assembly Diagram

Virginia Drainage Structures

20190528TED01

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

3) DI-5 top can set directly on 48"Ø manholes.

Riser

Intermediate Landing

DI-10GHI & 14ABC

(Type I)

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

VDOT Std DI-2

Frame & Grate Cast-In

Modified as Shown

DI-10GHI & 14ABC

(Type II)

TITLE

10-31-18

DATE

Precast DI-10GHI & DI-14ABC

Type I Inlet Top

Virginia Drainage Structures

20190102TED33

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Barrier, Throat, and nosing (galvanized angle) to be provided by others.

4) Dowel holes provided to prevent settlement of adjacent concrete.

5) "Center" orientation shown for clarity, other orientations as required.

Section View

Plan View

(Grate Removed for Clarity)

Isometric View

4'-10"

4'-10" 26" Opg

16

1

4

"

35" Opg

10"

9"

6" 2'-4"

9

1

2

"

8"

8"

16"

16"

11"

VDOT Std DI-2

Frame & Grate Cast-In

Modified as Shown

TITLE

10-31-18

DATE

Precast DI-10GHI & DI-14ABC

Type II Inlet Top

Virginia Drainage Structures

20190102TED34

Section View

Plan View

(Grate Removed for Clarity)

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Barrier, Throat, and nosing (galvanized angle) to be provided by others.

4) Dowel holes provided to prevent settlement of adjacent concrete.

5) "Center" orientation shown for clarity, other orientations as required.

VDOT Std DI-2

Frame & Grate Cast-In

Modified as Shown

4'-10"

4'-10" 26" Opg

16"

16"

10"

9"

6" 2'-4"

9

1

2

"

8"

15

1

4

"

8"35" Opg

11"

TITLE

10-30-18

DATE

Precast DI-10JKL & DI-14DEF

Type I & III Inlet with Flattop Assembly

Virginia Drainage Structures

20190102TED31

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Manhole sections conform to ASTM C478 & AASHTO M199.

4) Rectangular sections conform to ASTM C890 & C913.

5) Steps may be provided at 16" spacing, aligned vertically.

6) Barrier, Throat, and nosing (galvanized angle) to be provided by others.

Pipe Openings

As Required

3"Ø Weep Hole

DI-10JKL/DI-14DEF Top

VDOT Std DI-10JKL/DI-14DEF

Frame & Grate Cast-In

5

8"Ø Dowel Holes

for Interlock

A

s

R

e

q

u

i

r

e

d

Standard Manhole Base

DI-10JKL/DI-14DEF

Type 1 & III Flattop

DI-10JKL/DI-14DEF Inlet Riser

1"Ø Dowel Holes for Interlock

TITLE

10-29-18

DATE

Precast Flattop for DI-10JKL & DI-14DEF

Type I & III

Virginia Drainage Structures

20190528TED02

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

Section View

Plan View

(Grate Not Shown for Clarity)

Isometric View

DIM 48" ID 60" ID 72" ID 84" ID 96" ID 108" ID 120" ID 126" ID 144" ID

A 58" 72" 86" 100" 114" 128" 140" 147" 168"

B 10" 10" 10" 10" 12" 12" 12" 12" 12"

C 11

1

2

" 10" 10

1

2

" 11" 11

1

2

" 12" 12" 14" 14"

B

C

8

1

2

"

30"Opg

22"Opg

2"

TITLE

10-29-18

DATE

Precast DI-10JKL & DI-14DEF Inlet Top

Virginia Drainage Structures

20190102TED28

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Barrier, Throat, and nosing (galvanized angle) to be provided by others.

4) Dowel holes provided to prevent settlement of adjacent concrete.

Section View

Plan View

(Grate Removed for Clarity)

Isometric View

3'-10"

3'-2"

26"Opg

26"Opg

6"

12"

11"

1

1

2

"

9

1

2

"

12" 14"

VDOT Std DI-10JKL/DI-14DEF

Frame & Grate Cast-In

(4) 1"Ø Dowel Holes

for Interlock

10"

4"

5

8"Ø Dowel Holes

for Interlock

4"

5

1

2

"

5

8"Ø Dowel Holes

for Interlock

TITLE

10-29-18

DATE

Precast DI-10JKL & DI-14DEF

Type I & III Inlet

Virginia Drainage Structures

20190102TED30

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Rectangular sections conform to ASTM C890 & C913.

4) Steps may be provided at 16" spacing, aligned vertically.

5) Barrier, Throat, and nosing (galvanized angle) to be provided by others.

6) Max pipe size = 24"Ø.

VDOT Std DI-10JKL/DI-14DEF

Frame & Grate Cast-In

5

8"Ø Dowel Holes for Interlock

DI-10JKL/DI-14DEF Top

3"Ø Weep Hole

Pipe Openings

As Required (6)

A

s

R

e

q

u

i

r

e

d

A

s

R

e

q

u

i

r

e

d

2

2

"

8

"

Extended Base

Optional

8

"

2

'

-

6

"

1"Ø Dowel Holes for Interlock

TITLE

10-30-18

DATE

Precast DI-10JKL & DI-14DEF

Type II Inlet

Virginia Drainage Structures

20190102TED32

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Rectangular sections conform to ASTM C890 & C913.

4) Steps may be provided at 16" spacing, aligned vertically.

5) Barrier, Throat, and nosing (galvanized angle) to be provided by others.

6) Max pipe size = 24"Ø.

2

'

-

6

"

2

'

-

6

"

7

'

-

0

"

Extended Base

Optional

DI-10JKL/DI-14DEF Top

VDOT Std DI-10JKL/DI-14DEF

Frame & Grate Cast-In

5

8"Ø Dowel Holes for Interlock

1"Ø Dowel Holes for Interlock

3"Ø Weep Hole

Pipe Openings

As Required (6)

8

"

8

"

A

s

R

e

q

u

i

r

e

d

A

s

R

e

q

u

i

r

e

d

SL-1

Intermediate Landing

As Required

3

0

"

x

3

0

"

O

p

g

TITLE

11-14-18

DATE

Precast DI-12 Inlet Assembly Diagram

Virginia Drainage Structures

20190102TED44

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

Riser

Intermediate Landing

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

DI-12

2pc Transition Flattop

Transition Flattop

End Cap

Type I Grate

Type II Grate

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

TITLE

11-07-18

DATE

Precast DI-12 Inlet with Transition Flattop

Virginia Drainage Structures

20190102TED37

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Manhole sections conform to ASTM & AASHTO M199.

4) Steps may be provided at 16" spacing, aligned vertically.

5) Keyway provided to prevent settlement of adjacent concrete.

6) DI-12 inlet not to be utilized in locations normally subject to traffic.

7) Dimensions may vary due to form taper 1".

Type I Grate

Type II Grate

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

Pipe Openings

As Required

3"Ø Weep holes

Standard Manhole Base

DI-12 Transition Flattop

L

e

n

g

t

h

V

a

r

i

e

s

L

=

4

'

-

0

"

t

o

1

4

'

-

0

"

i

n

2

'

-

0

"

I

n

c

r

e

m

e

n

t

s

2

4

"

O

p

g

3

'

-

0

"

6

"

End Cap

(Bolted On)

6

"

6

"

Bolt Sleeves

Keyway3

6

"

O

p

g

1

2

"

6

"

TITLE

11-08-18

DATE

Precast DI-12 Transition Flattop

for 48"Ø-144"Ø

Virginia Drainage Structures

20190528TED03

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

Section View

Isometric View

Plan View

(Grates Not Shown for Clarity)

DIM 48" ID 60" ID 72" ID 84" ID 96" ID 108" ID 120" ID 126" ID 144" ID

A 58" 72" 86" 100" 114" 128" 140" 147" 168"

B 17" 2'-0" 2'-7" 3'-2" 3'-9" 4'-4" 4'-10" 5'-1

1

2

" 6'-0"

D 6" 6" 6" 8" 8" 8" 8" 8" 8"

E 11" 11" 11" 11" 11" 11" 11" 12" 12"

24"Opg7" 7"

2"

A

B

D

E

36"Opg

TITLE

11-07-18

DATE

Precast DI-12 Inlet with 2 Piece Flattop

Virginia Drainage Structures

20190102TED38

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Manhole sections conform to ASTM & AASHTO M199.

4) Steps may be provided at 16" spacing, aligned vertically.

5) Keyway provided to prevent settlement of adjacent concrete.

6) DI-12 inlet not to be utilized in locations normally subject to traffic.

7) Dimensions may vary due to form taper 1".

8) This design to be utilized when structure is too short to use standard Precast DI-12 Transition Flattop.

Type I Grate

Type II Grate

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

DI-12 2 Piece Flattop

Standard Manhole Base

Pipe Openings

As Required

End Cap

(Bolted On)

Bolt Sleeves

3"Ø Weep holes

Keyway

3

6

"

O

p

g

6

"

6

"

6

"

6

"

1

2

"

L

e

n

g

t

h

V

a

r

i

e

s

L

=

4

'

-

0

"

t

o

1

4

'

-

0

"

i

n

2

'

-

0

"

I

n

c

r

e

m

e

n

t

s

DIM 48" ID 60" ID 72" ID 84" ID 96" ID 108" ID 120" ID 126" ID 144" ID

A 10

1

2

" 17

1

2

" 24

1

2

" 2'-7

1

2

" 3'-2

1

2

" 3'-9

1

2

" 4'-3

1

2

" 4'-7" 5'-5

1

2

"

B 6" 8" 8" 8" 8" 8" 10" 10" 10"

D 12" 10" 10" 10" 10" 10" 8" 8" 8"

D

B

A

3

'

-

0

"

2

4

"

O

p

g

TITLE

11-14-18

DATE

Precast DI-12 Shallow Top

Assembly Diagram

Virginia Drainage Structures

20190102TED45

Notes

1) This drawing represents most common stacking orientations, additional stacking options may be available.

2) Manhole components to be per ASTM C478.

3) DI-12 inlet not to be utilized in locations normally subject to traffic.

Riser

Intermediate Landing

DI-12 Shallow Top

L=4 for 48"Ø & 60"Ø MH

Flattop Reducer

Cone Reducer 60'' & 72'' Only

Regular Base

Extended Base

No Base

48''Ø Components

60'', 72'', 84'', 96'', 108", 120", 126", & 144"Ø Components

No Base

Extended Base

Regular Base

Intermediate Landing

Riser

Intermediate Reducer

Landing

DI-12 Shallow Top

L=4, L=6, L=8 for 72"Ø-144"Ø MH

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

Type I Grate

Type II Grate

SECTION AB-AB

SCALE 1 / 30

A

A

B

B

TITLE

11-08-18

DATE

Precast DI-12 Shallow Top L=4'-0"

for 48"Ø & 60"Ø Manhole

Virginia Drainage Structures

20190102TED39

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) DI-12 inlet not to be utilized in locations normally subject to traffic.

4) DI-12 top used for 48"Ø & 60"Ø manholes.

Section View A-A

Isometric View

Section View B-B

Plan View

(Grates Not Shown for Clarity)

5'-8"

6'-4" 6'-0"

5'-4"

2"Taper

2" Taper

1

1

2

" Taper

1

1

2

" Taper

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

Type II Grate

Type I Grate

3'-0"

4"

10"

22"Opg23"

24"Opg

1

1

2

" Taper

2" Taper

5'-0"

48"Opg

46"Opg15"

Interlock groove for

48"Ø or 60"Ø Manhole

TITLE

11-12-18

DATE

Precast DI-12 Shallow Flattop L=4'-0"

for 72"Ø-120"Ø Manhole

Virginia Drainage Structures

20190102TED40

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) DI-12 inlet not to be utilized in locations normally subject to traffic.

Section View

Isometric View

Plan View

(Grates Not Shown for Clarity)

DIM 72" ID 84" ID 96" ID 120" ID

A 86" 100" 114" 140"

B 2'-7" 3'-2" 3'-9" 4'-10"

C 8" 8" 10" 10"

D 9" 10" 11" 12"

E 5" 6" 7" 8"

F 2'-1" 2'-8" 3'-3" 4'-4"

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

Type I Grate

Type II Grate

A

B

C

D

F

E

24"Opg

48"Opg

3'-0"

4'-8"

4"

TITLE

11-13-18

DATE

Precast DI-12 Shallow Flattop L=6'-0"

for 84"Ø-120"Ø Manhole

Virginia Drainage Structures

20190102TED41

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) DI-12 inlet not to be utilized in locations normally subject to traffic.

Section View

Isometric View

Plan View

(Grates Not Shown for Clarity)

DIM 84" ID 96" ID 120" ID

A 100" 114" 140"

B 3'-2" 3'-9" 4'-10"

C 8" 10" 10"

D 10" 11" 12"

E 6" 7" 8"

F 2'-8" 3'-3" 4'-4"

A

B

C

D

F

E

24"Opg

72"Opg

3'-0"

6'-8"

4"

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

Type I Grate

Type II Grate

TITLE

11-13-18

DATE

Precast DI-12 Shallow Flattop L=8'-0"

for 120"Ø Manhole

Virginia Drainage Structures

20190102TED42

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) DI-12 inlet not to be utilized in locations normally subject to traffic.

Section View

Plan View

(Grates Not Shown for Clarity)

Isometric View

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

Type I Grate

Type II Grate

12"

8'-8"

8"

3'-0"4'-4"

96"Opg

24"Opg 4'-10"

140"

4"

16"

TITLE

11-05-18

DATE

Precast DI-12 Inlet Box

Virginia Drainage Structures

20190102TED36

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Steps may be provided at 16" spacing, aligned vertically.

4) Dowel holes provided to prevent settlement of adjacent concrete.

Pipe Openings

As Required

Type II Grate

Type I Grate

VDOT Std DI-12 Type I or Type II

Frame and Grate Cast-In

3"Ø Weep holes

L

e

n

g

t

h

V

a

r

i

e

s

L

=

4

'

-

0

"

t

o

1

4

'

-

0

"

i

n

2

'

-

0

"

I

n

c

r

e

m

e

n

t

s

V

a

r

i

e

s

8

'

-

6

"

M

a

x

6

"

2

'

-

0

"

6

"

3

'

-

0

"

TITLE

11-15-18

DATE

Precast DI-13 Shoulder Slot Inlet

Virginia Drainage Structures

20190102TED46

Section View

Plan View

(Top Caps Not Shown for Clarity)

Isometric View

Notes

1) This design is intended for precast structures produced by CP&P only.

2) Concrete compressive strength 4,000 psi minimum.

3) Dowel holes provided to prevent settlement of adjacent concrete.

4) Right configuration shown, left confirguration opposite.

Side View

Type I (10'-0") or Type II (20'-0")

20"

2'-6"

4"

11"

14"

4"4"

1

2"Ø Inserts or

1

2"Ø x 2" x 1

1

2"

Hook Bolts Cast-In fo Top Caps

22" H x 20" W Opg

Top Caps

2ea for Type I

4ea for Type II

6"

5" Tapered Slot

6" Tapered Slot

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continuous innovation, and exceptional customer experience by consistently fulfilling our promise:

“Not Just Concrete, Concrete Solutions”