BS 5975 2019 Extract - Flipbook - Page 19
BRITISH STANDARD
BS 5975:2019
Symbol
Meaning
Unit
d
Still water depth
m
d1
d2
df
Depth from top of soffit to underside level of primary bearer
Depth from top of soffit to underside level of secondary bearer
Clear distance between flanges
mm
mm
mm
E
Young9s modulus of elasticity
N/mm2
eo
Eccentricity of a beam
mm
f
Max. force exerted by the wind on a component of a falsework structure
N
Fbc
Max. applied compressive bending stress
N/mm2
FC
Horizontal concrete force
N
Fc
Max. applied compressive axial stress
N/mm2
Fd
Force on trapped debris
N
Ff
Limiting value of the frictional force
N
FH
Horizontal disturbing force
N
FRc
Maximum applied compressive stress in the web
N/mm2
Fs
Partial soil factor
non-dimensional
Fv
Shear force
N
FW
N
Fx
Force due to water flowing around falsework members
Force due to concrete pipeline
N
fy
Yield stress
N/mm2
h
Depth of beam
mm
H
Reference height
m
h
Depth/height
m
H
Wave height
m
Hc
He
Compression flange restraint force
N
Effective height of the falsework
m
hf
Total height of the formwork
m
hF
Total height of the falsework
m
I
Moment of inertia
cm4
J
Moment of inertia of stiffener
mm4
Ka
Active pressure coefficient
non-dimensional
Kn
Kp
Timber modification factor
Passive soil resistance coefficient
non-dimensional
non-dimensional
L/I
Length
mm
»
Slenderness ratio
non-dimensional
L
Wave length
m
Lb
Clear length of a beam
mm
Ld
Horizontal distance of the slope downwind
m
Le
Effective length of a strut
mm
LE
Effective length
mm
Ls
Clear length of a column or strut
mm
Lu
Horizontal distance of the slope upwind
m
Lw
Width between vertical forms
mm
m
Factor for cantilever projection
non-dimensional
Mc
Safe working moment
kN/m
N
Characteristic compressive strength of a tubular strut
N/mm2
n
Number of node points
non-dimensional
© THE BRITISH STANDARDS INSTITUTION 2019 3 ALL RIGHTS RESERVED#11
