Windload Chart Generator

Formulas

H_deflection = (8EI / 15PDW)^1/3

H_stress = (2SA / 3PW%)^1/2

% = I_n / (I₁ + I₂ + I₃ + I₄)

Where

D - Deflection divisor

A - Allowable Stress, psi

E - Modulus of Elasticity, psi

H - Height of Opening, ft

W - Width of Opening, ft

P - Pressure, psf

Input Parameters

Min W, ft

P, psf

Part #

S value in³

Max W, ft

I value in⁴

If multiple shapes are selected, the curve will be based on the "weakest" shape.

*1. THESE WINDLOAD CHARTS ARE BASED UPON THE LESSER OF DEFLECTION RATIO (L/D) OR ALLOWABLE STRESS, A.

*2. THESE STRUCTURAL CURVES ARE ESTIMATES AND ARE PRESENTED TO THE BEST KNOWLEDGE OF THE WILLIAM L BONNELL COMPANY. IT IS HOWEVER THE RESPONSIBILITY OF THE CUSTOMER TO BE SATISFIED THAT THE CURVES ARE CORRECT. THE WILLIAM L BONNELL COMPANY MAY NOT BE HELD RESPONSIBLE IN ANY WAY FOR FAILURE OF PERFORMANCE RESULTING FROM THE USE OF THESE CURVES.