Page 265 - สะพานเครื่องหนุนมั่น

.
2
A = Area of the pile ( in )
p
P = Allowable buckling load ( Kips )
BU
lu = Unsupported length of pile ( ft )
d = Diameter of pile ( ft )
p
r = Radius of pile ( in )
p
E = Modulus of Elasticity ( ksi )
f = Allowable friction between pile and soil

A = Area of pile in contact with soil ( ft )
c
F = Allowable friction between soil and pile using static soil capacity formula ( k )
s
F = Allowable friction between soil and pile using dynamic
D
soil capacity formula ( k )
E = Driving energy ( ft- lbs/blow )
H
S = Average pile penetration ( inches/blow )

F = Maximum allowable load per pile ( k )
M
v = Dead load Shear per stringer ( Kips )
DL
2
A = Required Shear Area ( in )
vr
2
A = Shear Area of spacific beams ( in )
v
t = Thickness of deck required ( in. )
dr
t = Actual deck thickness ( in. )
d
w = Actual Dead Load per stringer ( Kips/ft )
DL
w' = Estimated Dead Load per stringer ( kips/ft )
DL
W = Weigth of stringer ( lbs/ft )
s
W = Weigth of accessorics ( 200 /ft )
a
W = Weigth of nailing strip ( lbs/ft )
ns
L = Maximum spacing of lateral braces ( ft )
u
N = Number of lateral braces
b