Your airfield carries aircraft up to 120,000 pounds with twin-wheel assembly. Your pipe must be 36
inches and it lies in a natural channel which allows five feet of cover. What gauge pipe will you use. Use Table
5-1, page 5-9.
Before compacting the backfill, a CMP of 48 inches must be __________.
A culvert must be placed under a roadway. You determine that the discharge rate requires a CMP of 18
inches. What will be the depth of cover, in inches?
What is the difference between computing a pipe diameter for a roadway culvert and computing the pipe
diameter for an airfield culvert?