What type of pipe is the support supporting?
(Steel, PVC, Copper etc.)
What is the service or application of the item being supported?
Gas, water, fuel oil, air, condensate etc.
What is the size of the item being supported and is it insulated?
What are quantities of items being supported by each support?
What type of support is needed?
What is the necessary vertical clearance from the roof surface to the bottom of pipe?
Is this support free-standing or structurally attached?
Is there a Roof Slope?