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LECTURE POINTS

I. STAIRCASES: INTRODUCTION

• DEFINITION

• FUNCTIONAL REQUIREMENTS OF STAIRS

•  TYPES OF STAIRS• STAIRS ANATOMY

•  TERMINOLOGIES

II. LAYOUT AND DESIGN OF STAIRCASES

• DESIGN REQUIREMENTS OF STAIRS (AS PERNBCP)

III. CONSTRUCTION OF STAIRCASES

• MATERIALS USED

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STAIRCASES DEFINED

• A stair is a series o ste!s" ea#$e%e&ate' a easre' 'ista*#e"

%ea'i*+ ro o*e %e&e% o astr#tre to a*ot$er.

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STAIRCASES DEFINED

• ,$e* t$e series is a#o*ti*os se#tio*-it$ot rea/s ore'

0 %a*'i*+s or ot$er#o*str#tio*s" t$e ters1i+$t o stairs or r* ostairs are ote* se'.

Ot$er ters t$at #a* e!ro!er%0 se' i*#%'estair-a0 a*' stair#ase.

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STAIRCASES DEFINED

• A Stair is a s0steo ste!s 0 -$i#$!eo!%e a*' o2e#ts

a0 !ass ro o*e%e&e% o a i%'i*+ toa*ot$er.

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STAIRCASES DEFINED

• A stair is to e 'esi+*e' to s!a* a%ar+e &erti#a% 'ista*#e 0 'i&i'i*+ iti*to sa%%er &erti#a% 'ista*#es" #a%%e'

steps.

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Some of the functionalrequirements of staircases are

• Stai%it0

• !rote#tio* ro 3re

•

Sita%e'ie*sio*s (or*ora%" e%'er%0"'isa%e' !eo!%e 4#$i%'re*)

• a!!eara*#e

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T!pes of Stairs

"#Strai$ht Run

•. Si!%est or o stair arra*+ee*t

•.

Co*sists o o*e strai+$t 1i+$t ostairs %i*/i*+ t-o %e&e%s.

•. T$e -i't$ a*' t$e %e*+t$ o t$e

%a*'i*+s s$o%' e e5a%(a6.789#).

•. It is t$e easiest to i%'

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Strai$ht Run

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Strai$ht Run

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T!pes of Stairs

%# De$ree Return Stair

• O!e* -e%% -it$ t-o 1i+$ts S!a#eet-ee* t$e %o-er a*' !!er 1i+$ts#ases $a% s!a#e %a*'i*+ to e%o*+er.

• Do+ %e+: T-o s$ort 1i+$ts -it$ a $a%s!a#e %a*'i*+ et-ee* t$e.

• Oter stri*+s o t-o 1i+$ts %ie i* t$esae &erti#a% !%a*e.

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De$ree Return Stair

• Do$le$ (retr* 1i+$t)

Stair i* -$i#$ t$e retr* 1i+$t is a'eso t$at t$e oter stri*+s o ea#$ 1i+$tis &erti#a%%0 i* %i*e.

• Open &ell

A stair $a&i*+ a -e%% srro*'e' 0 *ot%ess t$a* t$ree 1i+$ts or %a*'i*+s.

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De$ree Return Stair

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De$ree Return Stair

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T!pes of Stairs

'# L Shape( Stair

L s$a!e' stair a0 $a&e eit$er e5a%or *e5a% 1i+$ts

)a*a+

,uarter turn

A stair tr*i*+ t$ro+$ ;9o.

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L Shape( Stair

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L Shape( Stair

Three quarter turn

A stair t$at tr*s t$ro+$ 8

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T!pes of Stairs

-# .in(er Stairs

 =,i*'er> or >#r&e'> stairs reer tostair-a0s t$at a/e a tr* withoutincluding an intermediate landing or

 platform to !ro&i'e a 1at re#ta*+%artr*i*+ s!a#e.

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.in(er Stairs

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.in(er Stairs

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T!pes of Stairs

• /# Spiral Stairs

Stairs t$at $a&etrea's -$i#$ tr*a*' rise aro*' a#e*tra% #o%*..

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Spiral Stairs

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STAIR PARTS

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STAIR PARTS

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STAIR PARTS

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STAIR PARTS

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NATIONAL 0UILDIN1CODE

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NATIONAL 0UILDIN1CODE

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NATIONAL 0UILDIN1CODE

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NATIONAL 0UILDIN1CODE

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NATIONAL 0UILDIN1CODE

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NATIONAL 0UILDIN1CODE