Handbook of Civil Engineering Calculations

(a) Elevation normal to

principal plane

FIGURE 35

J. Compute the scale along the specified constant-scale line
From above, 6 = 3 1°14' and OK 1 = 92.60 mm. Then e = 92.60 - 20 = 72.60 mm. By Eq. c,
S = (0.07260)(0.8551)72925 = 1/47,120.

Design of Highway Bridges

Where a bridge is supported by steel trusses, the stresses in the truss members are deter-
mined by applying the rules formulated in the truss calculation procedures given earlier in
this handbook.
The following procedures show the design of a highway bridge supported by concrete

Ground

Horizontal

Vertical