StairCases 5(1)

7/23/2019 StairCases 5(1)

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STAIRCASES


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Relativity, 1953, M.C.ESCHER


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Angkor Wat Steps,Camboia

Symboli! Meaning o"Stair!ase


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#aris $pera Ho%se by C&arles 'arnier, (ea%) Arts

Ar!&ite!t%re Movement

Re*e!ting Ar!&ite!t%ralMovement


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'lass Spiral Stair!ase at AppleStore , (oston

Stair!ase as a+i"estyle


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Form

Feature Staircase at Lobby, New MajesticHotel Sin a ore


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Material

Feature Staircase, Longchamp Retail Storein New York Cit


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etailing

Hanging Staircase, !pple Store,"ei in


9/61esign "or all people-.

niversal/esign


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&anrails or g%ies to assist


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lanings to break a "all an provie apla!e "or rest


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s%0!ient &earoom to avoiin%ry


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barriers against "alling "rom 1.2 m or more "rom anopen sie


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STAIR TYPES

Straight flight: Not more than

18 rises without a change in

direction


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STAIR TYPES contd

!uarter turn with

landing


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STAIR TYPES contd

"alf turn with landing #doglegged stair$


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STAIR TYPES contd

!uarter turn with %ite winders


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"alf turn with winders

STAIR TYPES contd


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&'en (ell or Newel stair cases&'en (ell or Newel stair cases

(IT" INTER)E*IATE +,I-"T

(IT"&.T INTER)E*IATE +,I-"T

I- FLIGHT

II- FLIGHT

III- FLIGHT

LANDING

OPEN

WELL

OPEN

WELL

STAIR TYPES contd


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Circular and s'iral

stairs

STAIR TYPES contd


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/ased on t0'e of s'an/ased on t0'e of s'an

Horizontally spanning or transversely

spanning staircase

Longit!inally spanning staircase"

C,ASSI+ICATI&N


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#

*efinition

A stair is a conenient means of access 2etween the floors

of a 2uilding

It is constructed to 'roide read03 eas03 comforta2le andsafe ascent4descent with series of ste's that are neither

la2orious nor difficult to clim2 within an enclosure called

stairwell #staircase$

Stairs ma0 2e made from tim2er3 2ric%s3 stone3 metal and'lain and reinforced cement concrete

+inishing of mar2le3 tiles3 'laster3 etc are also 'roided

STAIR AN* ITS -E&)ETRY


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Stair Terminolog0


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#

1+light$ Flig%t is an ninterrpte! series o& steps 'et(een&loors or 'et(een &loor an! lan!ings) or 'et(een lan!ing an!

lan!ing"

5 ,anding$ Flat plat&or* at t%e %ea! o& a series o& steps"

6 Stairwell$ T%e space in (%ic% stair+lan!ing are %ose!"

7 Tread$ it is t%e pper sr&ace o& a step on (%ic% t%e &oot is

place! !ring ascent+!escen!s"

Riser$ T%e vertical *e*'er 'et(een t(o sccessive

trea!s"

Stair Terminolog0

S


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9 Ste's: T%e steps o& a stair are *a!e &ro* a series o&

%orizontal trea!s (it% risers in 'et(een"

Rise: It is t%e !istance *easre! vertically &ro* t%e sr&ace

o& one trea! to t%e sr&ace o& ot%er"

8 -oing$ !istance *easre! %orizontally &ro* t%e &ace o& oneriser to t%e &ace o& t%e ne,t riser"

; Nosing: T%e e,pose! e!ge o& a trea!) sally proecting

(it% a s.are) ron!e! or splaye! e!ge" An i*aginary lineconnecting all t%e nosing points parallel to t%e slope o& stair is

calle! line o& nosing"

Stair Terminolog0 contd


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1


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17 Pitch$ t%e inclination o& stair can 'e !e&ine! as eit%er 'y

t%e rise an! going o& t%e steps or as a pitc% o& a stair) (%ic%

is t%e angle o& stair (it% t%e %orizontal" T%e !i*ensions o& t%erise+going o& steps !eter*ine (%et%er stair is steep

0practically i*possi'le to cli*'1 or s%allo( 0too

la'orios+e,%asting to cli*'1"

1 "eadroom4Clearance$ It is t%e clear vertical !istance

'et(een t%e trea! o& t%e step an! so&&it o& t%e stair a'ove"

For people an! &or *oving goo!s + &rnitre) t%e *ini**

%ea! roo* o& 2"#* 0*easre! vertically1 is reco**en!e!

'et(een line o& nosing+so&&it o& stair) (it% *ini** clearanceo& #"3* *easre! at rig%t angle to t%e nosing line"

19 (inder: 4a!iating steps &or c%anging !irection o& a stair"

Stair Terminolog0 contd


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5ontents

De&inition an! parts o& 6tair cases

Types o& stair cases 4e.ire*ents

Pro'le*s

Art o& Dra(ing

*etailing of Staircase


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STAIR CASE

*efinition

6tair cases are se! &or t%e prpose o&

giving access to !i&&erent &loors o& a

strctre"


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Parts of stair a caseParts of stair a case

G

T

N

4

W

Le

L#L2

FLIGHT

FIG"# PA4T6 OF 6TAI4 5A6EFig" 2 DOG LEGGED 6TAI4 5A6E


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Parts of stairs contdParts of stairs contd

Flig%t an! lan!ing"

6teps

4ise-4

Going-G7T-NTrea!-T

Nosing -N

G

T

N

4

W


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T0'es of stair casesT0'es of stair cases

/ased on sha'e

6traig%t stairs

Dog legge! stairs

Open (ell or open ne(el stairs

Geo*etrical stairs sc% as spiral) circlar) etc"

Free stan!ing stair cases


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Horizontally spanning or transverselyspanning staircase

Longit!inally spanning staircase"

Classification /ased on t0'e of s'an/ased on t0'e of s'an



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&T"ER STAIRCASES&T"ER STAIRCASES

6PI4AL ANDGEO8ET4I5

6TAI45A6E64I6E4 AND T4EAD 6TAI45A6E



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-uide lines for fi=ing the dimensions-uide lines for fi=ing the dimensions4ise 041 $ #39** to #:9**

Trea! 0T1 $ 229 ** to 239 **- &or resi!ential 'il!ings"

4ise 041 $ #29 to #39 **Trea! 0T1 $ 239 ** to ;99 ** < &or p'lic 'il!ings

=T > 24? $ @et(een 399 ** to 39 **

T%e (i!t% o& t%e stair 9": * to # * &or resi!ential 'il!ing an! #": * to 2 * &or p'lic 'il!ing"

Re>uirementsRe>uirements


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-uide lines for fi=ing the dimensions-uide lines for fi=ing the dimensions Contd?Contd?

T%e (i!t% o& t%e lan!ing is e.al to t%e (i!t% o& stairs"

T%e n*'er o& steps in eac% &lig%t s%ol! not 'e greatert%an #2

T%e pitc% o& t%e stair s%ol! not 'e *ore t%an ;: !egrees"

T%e %ea! roo* *easre! vertically a'ove any step or

'elo( t%e *i! lan!ing s%all not 'e less t%an 2"# *"

Re>uirements contdRe>uirements contd


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*esign of stairs*esign of stairsDesign &or *a,i** 'en!ing *o*ent an! c%ecB &or*a,i** s%ear &orce"

T%e !ept% is to 'e &i,e! &ro* !e&lection criteria"

6tair case sla' is !esigne! as a conventional sla'"

All rles regar!ing t%e !etailing are si*ilar to t%at o& sla'"

Enog% !evelop*ent an! anc%orage lengt%s &or steels%ol! 'e provi!e!"



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Le

LANDING

WAI6T 6LA@

5ase 0a1

EFFE5TI/E 6PAN FO4

LONGITCDINALL6PANNING 6TAI45A6E6

WALL

WAI6T 6LA@ 6CPPO4TED AT THE

END6 OF LANDING6



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EFFE5TI/E 6PAN FO4

LONGITCDINALL6PANNING 6TAI45A6E6

Le

5ase 0c1

5ase 0'1

,e

Le7G >= >?) #* AND #*

Le7c+c o& 'ea*s

GOING7G



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E=erciseE=ercise

A dog legged stair case is to 2e detailed with the

following 'articulars:

5lear !i*ension o& stair case roo*7": * , 2"# *

T%e &loor to &loor %eig%t is ;"2 *

Wi!t% o& eac% trea! 7239 **

Heig%t o& eac% rise 7 #9 **

T%icBness o& (aist sla' 7 #39 **

Wi!t% o& &lig%t 7#*

All ron! (all 7 2;9 **

Pro2lemPro2lem


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E=erciseE=ercise contd3contd3

@ot% &lig%ts are spporte! at t%e en!s o&lan!ing on 2;9 ** (all"0Lan!ing an! &lig%t spans in t%esa*e !irection1

T%e &irst &lig%t starts &ro* t%e plint% level

*raw to a suita2le scale

T%e plan o& stair case 6ectional elevation o& t%e Gron! &lig%t 6ectional elevation o& t%e First &lig%t

E=erciseE=ercise


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SolutionSolution *imensioning:

47#9 **) T7 239 **

Floor to &loor %eig%t 7 ;299**

No o& rises 7 ;299+4 7 29" Eac% &lig%t %as #9 rises"

No o& trea!s per &lig%t7#9-# 7

Wi!t% o& lan!ing along &lig%t7 0:9-,2391+2 7 ###3**"

Going o& &lig%t7,239 72239**

E=erciseE=ercise contd3contd3


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E=erciseE=ercise

Plan o& stair case

P,AN

###3 ** ###3 **2239 **

Le7 #9 **

Gap79"#*2#99

5lear !i*ension o& stair case roo*7": * , 2"# *


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Than% You


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Transersall0 s'anning stair caseTransersall0 s'anning stair case

6TEP6

6T4INGE4

@EA86 6T4INGE4

@EA8

9"3 Ast

9"#Le-

9"#3Le

Le

Ast

D#D2

6TI44CP

8AIN 6TEEL

DI6T" 6TEEL

*etailing 'rinci'les*etailing 'rinci'les


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,ongitudinall0 s'anning staircase,ongitudinall0 s'anning staircase

*etailing*etailing

6teel at 'otto* longit!inally-tension

Anc%orage an! !evelop*ent steel

Distri'tion steel

4o( o& c%airs

No*inal &on!ation &or gron! &lig%t

*etailing 'rinci'les contd*etailing 'rinci'les contd


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4OW OF 5HAI46

399 **

399 **

GL

Wall

FOCNDATION

-R&.N* +,I-"T

8AIN 6TEEL

J #2 K #29

DI6T" 6TEEL

J : K 299

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StairCases 5(1)

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