Bridge Form

For bridges of three or more spans, a simple rule of thumb is to make all the middle spans equal and make the end spans two thirds the middle spans.

CBDG TG4

Concrete Bridge Development Group Technical Guide 4 - The aesthetics of concrete bridges makes the following recommendations:

Single Span

Figure 1: Form of single span structures
Figure 1: Form of single span structures

Two-span

Figure 2: Form of two-span structures
Figure 2: Form of two-span structures

Three-span

Figure 3: Form of three-span structures
Figure 3: Form of three-span structures