Before revision: Riser clamp for a standpipe through-penetration firestop inside a fire hose cabinet under construction A Riser clamp is a device used by mechanical building trades to support vertical runs of piping at each floor level.
After revision: Riser clamp for a standpipe through-penetration firestop inside a fire hose cabinet under construction A Riser clamp is a type of hardware used by mechanical building trades for pipe support in(risers) vertical runs of piping at each floor level.