Plenum Roof Load

In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing.

Plenum roof load.

Load limits on the roof of a building. The deck supports the non load bearing components such as insulation membrane flashing etc. Conduction loads from adjacent walls roofs or glazing. Plenum curb will convert a dedicated down discharge roof top unit into a plenum curb.

On the roof of a building a system composed of storm. Supply and or return plenums with field cut openings in roof curb floor. However some drop ceiling designs create a tight seal that does not allow for airflow and therefore may not be considered a plenum air handling space. The roof construction by using reflective surfaces there was no change in supply flow i think this was because of no reduction in load in the ls c report.

These heat sources may be radiant and convective loads from lighting and transformers. How this roof conduction load reduction effected in the conditioned space. Pre fabricated plenum roof curbs are available in the following. Roofs are under a lot of pressure.

The following formula shows how heat loss from plenum through floor above being calculated in revit. Check out our website for thousands of designs already loaded and priced simply register to view. Here is a little product knowledge on roof curbs. Where and the difference between them approximately is zero so q2 is zero which is the heat loss from plenum through floor above btu h which can be translated to loads so the roof load will be zero.

With ra plenum the space does not see the roof load well most of it the coil does. Or duct and piping systems within the plenum. With a ducted return you will need more air flow thus larger ducts larger fans etc and you will need much more ceiling space since now you will have supply and return ducts crossing at the ceiling. A drain designed to receive water collecting on the surface of a roof and to discharge it into a leader or a downspout.

Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum.