he Heavy Duty Round Manhole features a 1 1/4″ wide steel ring frame, 3/8″ diamond plate steel cover with rust resistant coating (covers 30″ and larger include a 4″ wide reinforcing channel welded to the underside of the cover), 14 gauge galvanized steel skirt and carries the H-20 load rating. The 16″ to 24″ models have covers with finger grip hole (excluding rain tight models). The 30″, 36″ and 38″ model covers include an easy grip recessed handle and the 42″ and larger model covers are provided with two easy grip recessed handles. The Model 106LA and Model 107 are limited access manholes, which include four 3/8″ flush mount stainless steel bolts. The Model 107 is also a rain tight manhole, which includes a Buna-N gasket. Optional PEMCO Model 106L liners are also available for all models of the heavy duty round manhole.