Page 266 - สะพานเครื่องหนุนมั่น

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S = Spacing of braces ( ft )
b
2
A = Area of bearing plate ( in )
PL
b = Width of stringer ( in. )
C = Width of Cap or sill ( in. )
b
B = Width of bearing plate ( in. )
PL
t = Thickness of bearing plate ( in. )
PL
P = Superstructure Dead Load ( Kips/ft )
DL
P = Superstructure Live Load ( Kips/ft )
LL
W = Dead Load, Span 1 ( Kips/ft )
1
W = Dead Load, Span 2 ( Kips/ft )
2
L = Length, Span 1 ( ft )
1
L = Length, Span 2 ( ft )
2
V LL (L1+L2 ) = Max Live Load shear for combined span lengths (kips)

H = Horizontal Load Due to Wind ( kips )
w_
d = Depth of the superstructure
s
K = Shape factor for water flow ( Table.7-1 )
w
Ah = Local scour ( ft )
p
Ah = Flood scour ( ft )
f
AH = Change in water surface elevation ( ft )
w
H = Depth of water above point of lowest scour ( ft )
w
A = Area over which the water force ( H ) acts
w
w
V = Velocity of water flow ( FPS )

H WA = Horizontal load due to water ( kips )

H = Horizontal load due to ice
1
b = Width of pier ( outside to outside ) ( IN )

t = Thickness of ice sheet ( IN )