Many States and municipalities
have implemented legislation that requires all new commercial
and industrial structures that utilize “truss-type
construction” to have a sign warning emergency personnel
that the building was built with trusses.
The codes defines trusses to include all fabricated components
(constructed with diagonal members) made of wood and steel, requires
the Signs, Placards or Emblems affixed to the building exterior.
The above graphics is used for quick assessment of the structure
for potential Collapse Dangers associated with truss constructed
buildings. The Signs, Placards, Emblems or Stickers are placed
on exterior of buildings with Truss construction.
The use of Truss-type construction (a very common, affordable
and safe structural system) a reliable means of spanning
and creating open floor space. Trusses are pre-engineered
wood or steel, fabricated with diagonal members and used
roofs and floors.
However, when exposed to fire presents a great danger to
firefighting personnel when those structures are involved
in fire conditions.
Under these fire and heat conditions the truss systems
can weaken and fail, leading to roof or floor collapse.
a building are covered by roof and floor decking and in
not in view. Fires can go undiscovered long enough to weaken
the diagonal member connections in as little as 10 minutes.
Failure of one truss jeopardizes the entire floor and/or
By design, the truss members in floor and roof assemblies
will collapse, without warning, after being exposed to
heat or flame
contact for a very short period of time. Because of the
inherent danger firefighters must face while operating
buildings, the Truss Identification Sign Compliance has
to alert personnel of the danger prior to beginning fire
Please review the individual State of Municipality codes
for exact requirement and placement of the Truss Identification