Rafter Table Calculator

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What is a Rafter Length Calculator?

A rafter length calculator is a tool used to estimate the length and angles of roof rafters for construction or roofing projects.

It helps determine the rafter length needed to support the roofing material and provide the desired slope.

Why Use a Rafter Length Calculator?

A rafter length calculator is essential for ensuring that the rafters in a roof structure are of the correct length and angle to support the roof covering efficiently.

It helps maintain structural integrity and prevent issues like sagging or leaks.

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Rafter Length Calculator

A rafter length calculator is a tool used to estimate the length and angles of roof rafters for construction or roofing projects.



Result: The estimated rafter length is: ? feet.

How to Use a Rafter Length Calculator:

  1. Input the horizontal run (the distance along the bottom of the roof) in feet.
  2. Enter the roof pitch in degrees (the slope of the roof).
  3. Click the "Calculate" button to perform the calculation.
  4. The calculator estimates the rafter length needed to support the roof.

Example Calculation:

Suppose you have a horizontal run of 10 feet, and you want to create a roof with a 30-degree pitch.

Using the calculator, you would find that the estimated rafter length is approximately 11.55 feet.

This calculation helps you determine the proper rafter dimensions for your roofing project.

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