BS 5975 2019 Extract - Flipbook - Page 18
BS 5975:2019
BRITISH STANDARD
MC
moderately conservative
M&E
mechanical and electrical
NASC
National Access and Scaffolding Confederation
NGRDL
National Grading Rules for Dimension Lumber
NLGA
National Lumber Grades Authority
PC
principal contractor
PC9s TWC
principal contractor's temporary works co-ordinator
PD
principal designer
PW
permanent works
PWD
permanent works designer
RAMS
risk assessment and method statement
RSJ
rolled steel joist
SS
special structural (timber category)
TW
temporary works
TWC
temporary works co-ordinator
TWD
temporary works designer
TWDC
temporary works design checker
TWS
temporary works supervisor
The following symbols are used in this British Standard.
Symbol
Meaning
Unit
Ç1
Average shear stress
N/mm2
Ç2
Maximum shear stress
N/mm2
A
Altitude of the site
m
A
Cross-sectional area of standard
mm2
Ad
Area of obstruction presented by trapped debris and falsework
m2
Ae
Effective area of the component
m2
Aw
Effective area normal to the flow
m2
Ax
Cross-sectional area of pipeline
mm2
b
Width of beam
mm
b
Width of falsework
m
b
Stiff length of the bearing
mm
c
Undrained shear strength
N/m2, kN/m2
cf
Force coefficient for the component
non-dimensional
Cpe
cs
Cw
Net pressure coefficient
Site coefficient
Coefficient for water appropriate for falsework members
non-dimensional
non-dimensional
non-dimensional
d
Height of the leeward parapet
m
&
Delta
mm, m
Overall depth of beam or section
mm
D
10#© THE BRITISH STANDARDS INSTITUTION 2019 3 ALL RIGHTS RESERVED
