How To Support Round Ducts On Roof

Support systems for ductwork may provide restraint in three directions against displacement and rotation.

How to support round ducts on roof.

Since gravity is the first force you must design for in a roof support system you can see where a lighter duct will be desirable. The php d duct support leverages a goal post design with a single crossbar below the duct to support all sizes of square or round ducting cable trays and piping. Assemble the metal ducting like a zipper. The duct hangers for round ducts shown in figure 2 give an idea of the way in which the ducting is hung from a slab or roof trusses.

Your performance is the same as for our other round duct products. Up to 12 diameter. Round spiral ducts are generally 30 percent less weight than equivalent rectangular ducts. Use your leg a workbench or the ground to support the back side of the pipe.

4 0 36 1 4 to 48 dia. Hanger and support spacings are greater for round ducts. About duct suspension and support systems lindab offers a range of products for hanging circular and rectangular duct systems. Use one hand to keep the two edges close and the other to apply downward pressure.

When assembling pipe start at one end and work the seam together like a zipper. 5 0 48 1 4 to 60 dia. For round ducts larger than 1 600mm diameter the support system must be engineered for the duct mass. 7 0 72 1 4 to 84 dia.

Our rooftop duct supports and other roof support systems offer a wide range of options for supporting hvac ductwork supports on top of rubber membrane steel and concrete roofs. 6 0 60 1 4 to 72 dia. Round duct size equipment rail length. Typical round duct hangers.

Consideration must be given with restraining ducts to avoid development of excessive internal duct stresses caused by expansion or contraction due to temperature variations. Engineered rooftop pipe and duct support systems mechanical unit supports bridge crossovers platforms and more. Sketches as indicated in sans 10173 2003. This support can meet nearly all height requirements above the roof surface and is approved for seismic and high wind applications.

2 0 12 1 4 to 24 dia. Hangers for round ducts. Made in america with a 20 year warranty. It includes hangers wall and ceiling attachment joining material duct attachment etc.

Optional crossbracing systems specifically designed for high wind applications improve rooftop wind ratings.