Deflection is an important criterion when designing floor trusses. There are circumstances when the deflection requirements for a specific structure that utilizes trusses as structural members are questioned. This is especially the case when either floor toppings and/or brittle floor coverings are specified or were not included in the specification but are installed after the floor trusses have been installed.

This guide will discuss the code deflection requirements for trusses as well as manufacturer or trade association deflection requirements. The role of the truss designer and building designer in the process will also be discussed.
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