A New York law that took effect on Jan. 1 requires contractors to post white, reflective signs in residential structures that they build or renovate with pre-engineered wood or timber trusses.
The signs, common in commercial construction, will alert firefighters about the makeup of a building’s roof and floors. The law also requires property owners or builders to reveal on building permit applications if trusses will be used in construction.
Firefighters and code officials have claimed that gusset plates and other metals used in truss installation can fail during a fire and cause large beams to collapse.
It’s usually not obvious to a firefighter which kind of construction materials have been built into a burning building. Lawmakers have said the warning signs will help firefighters better protect themselves because they will know what to watch out for.