Corrugated Metal Pipe (CMP) includes both:
Corrugated Steel Pipe (CSP)
Corrugated Aluminum Pipe (CAP)
CMP is pipe/conduit made from steel or aluminum which is corrugated to give it strength.
CMP is strong enough to handle, AASHTO Highway loading, Rail Road loading, and mining loading.
AASHTO considers Corrugated Metal Pipe (CMP) a metal/soil interactive structure. The overall performance depends on a quality backfill and installation.
A quality backfill is made up of a clean, well draining aggregate or sand material.
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