True (shear-free) and Apparent Moduli of Elasticity

In an engineering design, the deflection of a structural member under applied loads determines a service limit state that is often prescribed by the building code.

This publication is designed for: architects, engineers, designers

This publication explains relationships among bending deflection, shear deflection, total deflection, apparent modulus of elasticity and true modulus of elasticity in prismatic bending members. It includes several equations and references to relevant standards.

Key sections include:

• True (shear-free) modulus of elasticity

• Apparent modulus of elasticity

• Determination of E_true and E_apparent

• Comparison between E_true and E_apparent

Published by APA — The Engineered Wood Association.