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Page 1

BRITISH STANDARD BS 6100-1.3.4:
1989
Incorporating
Amendment No. 1

Glossary of

Building and civil
engineering terms —

Part 1: General and miscellaneous —

Section 1.3 Parts of construction
works —

Subsection 1.3.4 Stairs and circulation
elements

UDC [624 + 69]:001.4

Page 2

BS 6100-1.3.4:1989

This British Standard, having
been prepared under the
direction of the Basic Data and
Performance Criteria for Civil
Engineering and Building
Structures Standards Policy
Committee, was published
under the authority of the
Board of BSI and comes
into effect on
28 February 1990

' BSI 08-1999

The following BSI references
relate to the work on this
standard:
Committee reference BDB/3
Draft for comment 87/10875 DC

ISBN 0 580 17562 6

Amendments issued since publication

Amd. No. Date of issue Comments

7234 August 1992 Indicated by a sideline in the margin

Page 6

iv blank

Page 7

BS 6100-1.3.4:1989

' BSI 08-1999 1

134 1 Base terms

134 2 Types of stair

134 3 Parts of stairs

No. Term Definition

134 1001 stair
staircase, stairway
deprecated

Construction that comprises a succession of horizontal stages (steps
or landings) that make it possible to pass on foot to other levels.

134 1002 circulation element Construction for the movement of people or goods.

134 1003 circulation space Space for the movement of persons, goods or vehicles.

134 2001 simply supported
stair

Stair in which both ends of each step are supported.

134 2002 cantilevered stair Stair in which one end only of each step is supported.

134 2003 double cantilevered
stair

Stair in which the steps are supported only on a carriage usually
centrally positioned.

134 2004 straight stair Stair in which the direction is the same throughout.

134 2005 turning stair Stair in which the direction is changed.

134 2006 double return stair Turning stair with one flight to a landing and a flight from each
side of that landing.

134 2007 dog-leg stair
dog-legged stair
deprecated

Turning stair of two flights with a half landing and without a
stairwell.

134 2008 open well stair
open newel stair
deprecated

Turning stair with a stairwell.

134 2009 geometrical stair Turning stair in which the outside string and handrail continue in
an unbroken line with curved ends.

134 2010 winding stair Turning stair that describes a helix with treads wider at the wall
string than at the outside string.

134 2011 spiral stair Winding stair that describes a helix around a central column.

134 2012 helical stair Winding stair that describes a helix around a stairwell.

134 2013 circular stair Helical stair shaped as a circle on plan.

134 2014 elliptical stair Helical stair shaped as an ellipse on plan.

134 2015 open rise stair Stair in which the vertical spaces between successive treads are not
fully filled by risers.

134 2016 alternating tread
stair

Stair with winders with the wide end alternating from one side to
the other on consecutive treads.

134 3001 step Part of a stair that consists of a horizontal surface to support the
foot during ascent or descent and a vertical surface or space that
results from the change in level.

134 3002 tread Horizontal component of a step.

134 3003 riser Vertical component of a step between tread or landing and the tread
or landing above or below it.

Page 11

BS 6100-1.3.4:1989

' BSI 08-1999 5

Index

alternating tread stair 134 2016
balanced step 134 3015
baluster 134 3025
balustrade, stair 134 3024
balustrade height 134 4009
bracketed string 134 3037
bracketed string, cut and 134 1038
bullnose step 134 3013
cantilevered stair 134 2002
cantilevered stair, double 134 2003
capping, string 134 3039
carriage 134 3021
catwalk 134 6001
circular stair 134 2013
circulation element 134 1002
circulation space 134 1003
clear width, stair 134 4010
clearance 134 4008
close string 134 3034
commode step 134 3014
core rail 134 3023
curtail step 134 3010
cut and bracketed string 134 3038
cut and mitred string 134 3037
cut string 134 3036
dancing step 134 3015
dog-leg stair 134 2007
dog-legged stair 134 2007
double cantilevered stair 134 2003
double return stair 134 2006
easing, stair 134 4013
element, circulation 134 1002
elliptical stair 134 2014
enclosure, stair 134 5002
end, returned 134 3027
flier 134 3006
flight 134 3005
flight, winder 134 3008
geometrical stair 134 2009
going 134 4001
half landing 134 3019
half newel 134 3040
handrail 134 3022

headroom, stair 134 4007
height, balustrade 134 4009
helical stair 134 2012
housed string 134 3034
intermediate landing 134 3018
kite winder 134 3009
landing 134 3017
landing, half 134 3019
landing, intermediate 134 3018
landing, quarter 134 3020
line, nosing 134 4004
line, pitch 134 4005
line, walking 134 4002
mitred string, cut and 134 3037
newel 134 3029

newel, half 134 3040
newel stair, open 134 2008
nosing 134 3004
nosing line 134 4004
open newel stair 134 2008
open rise stair 134 2015
open string 134 3036
open well stair 134 2008
outer string 134 3033
outside string 134 3033
parallel tread 134 3006
pitch 134 4006
pitch line 134 4005
platform 134 3016
post, storey 134 3030
quadrant step 134 3012
quarter landing 134 3020
rail core 134 3023
ramp 134 6002
return stair, double 134 2006
returned end 134 3027
rise 134 4003
rise stair, open 134 2015
riser 134 3003
round-end step 134 3011
run 134 4001
scroll 134 3027
scroll step 134 3010
simply supported stair 134 2001
space, circulation 134 1003
spandrel, stair 134 3026
spiral stair 134 2011
stair 134 1001
stair, alternating tread 134 2016
stair, cantilevered 134 2002
stair, circular 134 2013
stair, dog-leg 134 2007
stair, dog-legged 134 2007
stair, double cantilevered 134 2003
stair, double return 134 2006
stair, elliptical 134 2014
stair, geometrical 134 2009
stair, headroom 134 4007
stair, helical 134 2012
stair, open newel 134 2008
stair, open rise 134 2015
stair, open well 134 2008
stair, simply supported 134 2001
stair, spiral 134 2011
stair, straight 134 2004
stair, turning 134 2005
stair, winding 134 2010
stair balustrade 134 3024
stair clear width 134 4010
stair easing 134 4013
stair enclosure 134 5002
stair spandrel 134 3026
staircase 134 1001
stairway 134 1001

stairwell 134 5001
step 134 3001
step, balanced 134 3015
step, bullnose 134 3013
step, commode 134 3014
step, curtail 134 3010
step, dancing 134 3015
step, quadrant 134 3012
step, round-end 134 3011
step, scroll 134 3010
step, wheel 134 3007
storey post 134 3030
straight stair 134 2004
string 134 3031
string, bracketed 134 3037
string, capping 134 3039
string, close 134 3034
string, cut 134 3036
string, cut and bracketed 134 3038
string, cut and mitred 134 3037
string, housed 134 3034
string, open 134 3036
string, outer 134 3033
string, outside 134 3033
string, wall 134 3032
string, wreathed 134 3035
stringer 134 3031
supported stair, simply 134 2001
tapered tread 134 3007
tread 134 3002
tread, parallel 134 3006
tread stair, alternating 134 2016
tread, tapered 134 3007
tread width 134 4011
turning stair 134 2005
waist 134 4012
walking line 134 4002
walkway 134 6001
wall string 134 3032
well stair, open 134 2008
wheel step 134 3007
width stair clear 134 4010
width tread 134 4011
winder 134 3007
winder, kite 134 3009
winder flight 134 3008
winding stair 134 2010
wreath 134 3028
wreathed string 134 3035

Page 12

BS 6100-1.3.4:
1989

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