Spacing For Pipe Supports

Spacing: Is There A Rule Of Thumb?

Mar 19, 2019 5:20:03 PM / by Scott S.

So here you are...

Working on a job that requires you to find out how far apart each pipe support should be. What do you consider first? What about this water pipe that is constantly in motion? There are many questions that can be asked but we are going to break down the basics to consider when you are calculating the spacing of rooftop pipe supports.

As we touched on in our blog on local codes, there are many variable to consider when it comes to spacing. Some of these are going to be dictated by the codes you abide by in your territory. There is a balance that has to be considered, what you get vs. what you give up. You can save cost by spacing the supports further apart. You also will have less weight on the roof. However, now you have less support for you piping, potentially increasing the risk of sagging and breaking. To make an informed decision, these are the factors that you are going to want to consider for all your jobs:Comfort Services C10-2

1. Local Codes: The standard maximum for rooftop pipe supports is 10 feet on a commercial building, however this could change based on your local building code. Always refer to the code and never assume it has "enough" support.

2. Pipe Type: What kind of pipe are you supporting? What are the contents of the pipe? Will the pipe shake, expand and contract? These questions will help choose the proper support. Consider a rubber roller mounted on a support for a pipe that expands and contracts.

3. Seasonal Weather: Some areas get heavy snowfall adding extra weight to the rooftop for portions of the year. This weight will need to be worked into the calculations.

4. Type of Roof: Assessing what the roof type is will be crucial. If you have a roof that gets soft in the heat, then you will want to make sure your calculations take this into consideration this so you are not putting too much weight on one point causing denting, sinking and ultimately damage. Another topic to consider is a slip sheet below the product. Check our blog on slip sheets HERE.20170707_130157

5. Contents: If the pipe is carrying a hazardous material that can caused increased damage, you will want to err on the side of caution and space your supports closer together to prevent any possible break or leak.

6. Pipe Temperature: Hot pipes need more support as they can deflect (sag) when they rise in temperature. If your supports are too far apart, you risk deflection when the pipe gets hot.

As always, start by referring to your local building codes and consider these 6 criteria when you are calculating spacing.

Scott S.

Written by Scott S.