Purlin Size Calculator

What is a Purlin Size Calculator?

A purlin size calculator is a tool used to estimate the required size or dimensions for purlins, which are horizontal members in a roofing system.

The calculator takes into account factors such as the roof span, total roof load, and the material of the purlins.

Why is a Purlin Size Calculator Used?

This calculator is used to ensure that purlins in a roofing system are of the appropriate size to support the expected load and maintain structural integrity.

How to Use a Purlin Size Calculator:

1. Input the roof span, which is the horizontal distance between supporting structures, in feet or meters.
2. Specify the total roof load in pounds or kilograms.
3. Select the material of the purlins from the dropdown menu.
4. Click the "Calculate" button.
5. The calculator will provide an estimate of the required purlin size or dimensions.

Example Calculation:

Suppose you have a roofing project with a roof span of 20 feet and a total roof load of 2,000 pounds, and you plan to use steel purlins.

Enter 20 as the roof span, 2000 as the total roof load, and select "Steel" as the purlin material in the calculator.

Click "Calculate," and it will recommend a purlin size of approximately 1385.65 inches or 7.19 centimeters, depending on your unit of measurement.

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