床梁荷重計算機

共有リンク

はじめに

Joist Load Calculator — Load per joist from tributary width. Enter Tributary width (m), Load (kN/m²) to get an instant, accurate result.

計算式

Load per joist = tributary width × load per unit area, a standard structural tributary-area approximation for distributing floor or roof loads to individual joists.

ステップごとの説明

Enter the Tributary width (m).
Enter the Load (kN/m²).
Click Calculate to see your result instantly.

実例

Example: With Tributary width (m) = 0.4, Load (kN/m²) = 2, the Joist Load Calculator gives Load Per Joist Kn M: 0.8.

よくある質問

What is "tributary width"?

It is the portion of the floor or roof area that each joist is assumed to support, typically half the distance to each neighboring joist.

Is this sufficient for permit or construction documents?

No, this is a simplified estimate — actual joist sizing must follow applicable building code span tables or a structural engineer's calculations.

What inputs does the Joist Load Calculator need?

You'll need to provide: Tributary width (m), Load (kN/m²). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Joist Load Calculator?

The Joist Load Calculator applies the formula exactly as calculated — Load per joist = tributary width × load per unit area, a standard structural tributary-area approximation for distributing floor or roof loads to individual joists. — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Joist Load Calculator free to use?

Yes, the Joist Load Calculator is completely free, requires no signup, and runs instantly in your browser.