NDS C15.4 - CLT Combined Axial and Bending

For combined axial and bending design, the program uses the formula from NDS Commentary C15.4-5, rather than equations 15.4-1 to 15.4-4 that is used for other materials. This equation is also given in CLT Handbook, Chapter 8, Section 4.1.4.1, Equation 18:

where,

P is the axial load in lbs

P’ is the axial resistance = F_c^’ A_eff

M is the maximum moment

Δ is the maximum out-of-plane deflection, including load eccentricity

P_cE is the buckling resistance given in NDS C3.7.1-4 - Alternative Buckling Resistance for CLT Wall Panels