Often deflection is a controlling restraint in structural beam design, especially in longer spans. Whilst any structural member can be designed to minimise deflection, Glulam is the only engineered wood product that can easily be pre-cambered to eliminate the aesthetic effect of in-service deflections.

A typical pre-camber is the 1 / 400 ratio.

This means: Length of beam/400 = Upward camberof the beam