Please note that shear deflection is applied to I-joist sections in the AU Timber Beam Calculator, but is not performed for other AU timber sections.
Simply supported beam under uniform load | |
Simply supported beam under point load | |
Cantilever beam under uniform load | |
Cantilever beam under point load |
The AWC also provides an alternative method in its Manual for Engineered Wood Construction to estimate shear deflection in wood beams, where the shear deflection is directly related to the equivalent deflection in a uniformly loaded beam. However, weâve found that this approximation tends to differ significantly from the values predicted by theory - for instance, it overpredicts the shear deflection in a cantilever by more than 200%.
The APAâs technical bulletin on Performance Rated I-joists shows the shear stiffness value K to be used for I-joists.