Washington DC-Manhole Repair

A 2-ft long segment manhole needed an emergency repair, which sat on a 78″ R.C.R sewer pipe. The fabrics were wrapped externally and use the wet layup installation method. Also, FRP anchors were installed to anchor the Manhole top to the base structure.

Puerto Rico-Manhole and Riser Repair with StifPipe®

29 segments of approximately 44” long by 35” O.D. StifPipe® sections were manufactured to internal and external repair 29 steel manholes as below.  The bottom was sealed and the annular space was grouted behind each StifPipe®.