The H-W series is a channel framed access cover with H-20 load rating. H-W series cover should be used in off street locations where the unit will not be subjected to high density traffic. Acceptable locations include vaults located close to roadways but not in the street. Single and double door units are supplied with spring assists. Please see the drawing page for standard features. The channel frame acts as a gutter to capture water run off and divert it away from the interior of the vault. Although the unit is not 100% water tight, it should be used when water intrusion is a determining factor.