For 4 0 sections of rectangular duct maintain a spacing of not more that 8 0.
Roof duct support spacing.
Let s dig a little deeper and look at some of the factors that are important to pipe support spacing.
Based on the shape of the duct and the length of your duct joints you can now start locating the rest of your supports.
Php duct supports are designed and engineered to adhere to your unique specifications and solve every rooftop issue you have.
Consideration must be given with restraining ducts to avoid development of excessive internal duct stresses caused by expansion or contraction due to temperature variations.
Start by checking your local codes.
For high density polyethylene hdpe the spacing would vary from 7 ft for 4 pipe with sdr diameter over thickness of 11 0 to 16 ft for 24 pipe.
Php is the leading designer manufacturer and supplier of innovative and sustainable roof pipe and equipment support systems in the nation.
For fiber reinforced plastic pipe frp support spacing in liquid service would vary from around 11 ft for 2 pipe to 22 ft for 8 pipe.
Support systems for ductwork may provide restraint in three directions against displacement and rotation.
Duct rests on a 1 5 8 x 1 5 8 length of channel strut which is adjustable up and down using the channel nuts in the corner brackets.
And for gas service 17 ft for 2 to 40 ft for 8.
1 ft foot 0 3048 m 12 in.
Pipe size and weight.
Schedule a roof evaluation.
While the standard maximum spacing for roof pipe supports is 10 feet your community may require more supports and tighter spacing.