Pipe Bedding and Backfill
• CMP (corrugated metal pipe). steel or aluminum • Fiberglass pipe • Polyvinyl chloride (PVC) pipe • Polyethylene (PE) pipe 5. TRENCH EMBEDMEN T REPLA CEO FOUNDA TION FOUNDA TRENCH TERMINOL OG Y BEDDING TION 6. Foundation The foundation is the inplace material beneath the pipe. If the foundation is