How To Support Round Ducts On Roof

Sketches as indicated in sans 10173 2003.

How to support round ducts on roof.

Hanger and support spacings are greater for round ducts. Typical round duct hangers. And this is truly a round duct not an 8 or 12 sided adaptation from rectangular duct. When assembling pipe start at one end and work the seam together like a zipper.

About duct suspension and support systems lindab offers a range of products for hanging circular and rectangular duct systems. 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. Optional crossbracing systems specifically designed for high wind applications improve rooftop wind ratings. Consideration must be given with restraining ducts to avoid development of excessive internal duct stresses caused by expansion or contraction due to temperature variations.

This support can meet nearly all height requirements above the roof surface and is approved for seismic and high wind applications. 3 0 24 1 4 to 36 dia. Made in america with a 20 year warranty. Engineered rooftop pipe and duct support systems mechanical unit supports bridge crossovers platforms and more.

Support systems for ductwork may provide restraint in three directions against displacement and rotation. 2 0 12 1 4 to 24 dia. 4 0 36 1 4 to 48 dia. Hangers for round ducts.

It includes hangers wall and ceiling attachment joining material duct attachment etc. 5 0 48 1 4 to 60 dia. 6 0 60 1 4 to 72 dia. Use your leg a workbench or the ground to support the back side of the pipe.

For round ducts larger than 1 600mm diameter the support system must be engineered for the duct mass. 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. Assemble the metal ducting like a zipper. Round spiral ducts are generally 30 percent less weight than equivalent rectangular ducts.

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. Your performance is the same as for our other round duct products. Round duct size equipment rail length. Use one hand to keep the two edges close and the other to apply downward pressure.

Our standard construction uses our spiral duct as the outer shell and a round metal longitudinal seam duct for the inner shell.