Road bed steel that construction building site was used constructs

The utility model discloses a road bed steel that construction building site was used constructs, including steel structure frame, and the support is in the steel that the steel constructs the frame top constructs the road bed board, the steel constructs the symmetrical supporting shoe that is provided with four triangle -shaped of both sides position department of the inside of frame, the supporting shoe sets up what the steel constructed the frame is close to bottom position department, the top cooperation of supporting shoe has the support groove, and it has the bearing plate to cooperate at two symmetrical support inslots that set up, four the apex angle position departments of being close to that the steel constructs road bed board bottom are provided with the setting element, the steel constructs frame and four transition fit between the setting element, this device constructs the frame at the in -service use in -process through the steel and carries out bottom sprag, carries out the support of fretwork