I-Joist Span Calculator

What is an I-Joist Span Calculator?

An “I-Joist Span Calculator” is a tool used to determine the maximum span or length that engineered I-joists can safely cover between supports.

It calculates the allowable span based on the depth of the I-joist, the joist spacing (on center), and the grade of the I-joist.

Why use an I-Joist Span Calculator?

Using this calculator is important for several reasons:

• Structural design: It helps engineers and architects select the appropriate I-joist size and spacing to meet structural and safety requirements.
• Material selection: It aids in choosing the right I-joist grade and dimensions for a construction project.
• Safety and compliance: Ensuring that I-joists are correctly sized and spaced is essential for the safety and stability of structures.

How to use an I-Joist Span Calculator:

1. Input the depth of the I-joist (in inches).
2. Input the joist spacing (in inches, measured on center).
3. Select the grade of the I-joist (e.g., lumber or engineered).
4. Click the "Calculate" button.
5. The calculator estimates the maximum allowable span for the I-joist.

Example calculation:

If you input an I-joist with a depth of 11.875 inches, a joist spacing of 16 inches on center, and select "Engineered" grade, the calculator will estimate that the maximum allowable span for the I-joist is approximately 120 inches (12 feet).

This calculation is based on the input values and predefined allowable spans for the selected grade.

Actual spans may vary based on specific product specifications and design factors.

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