P6000 Series Curbs are high quality, structural tubular steel support systems for rooftop unit seismic/wind restraint. Each custom-built unit incorporates a seismic restraint system into one complete structure. VMC engineers design each curb to custom fit any rooftop mechanical equipment.
P6000 non isolated seismic curbs can be specified to compensate for large floor spans, the seismic load paths are positioned within the curb at the correct load points for proper support and seismic restraint. The structural curb is designed to transfer the seismic load into the building structure and provide a positive attachment to the building and the curb to the rooftop unit.
The curb and rooftop unit can be fully installed before the roof is sealed.
P6000 roof curbs are fabricated from force-resisting structural steel specifically designed to withstand seismic and high wind forces. Unlike standard curbs that typically come with a rooftop handling unit, or sheet metal curbs, the VMC rooftop support systems combine our seismic design within a moment resisting frame. Our high strength frame is capable of direct, positive attachment to both the building structure and the roof mounted equipment. Standard sheet metal curbs that typically come with rooftop equipment are not capable of resisting these forces and do not allow for direct, positive attachment to the roof structure and mechanical equipment. Our high strength frame can be bolted or welded to the roof’s structural steel and will not break away during an earthquake or high wind forces. Sheet metal curbs cannot accept point-loading of these forces and will tear away from the building structure due to their thin construction.