This Hackensack NJ Floor and Roof S-F Truss Sign identifies a building as having a floor and roof truss construction, and also informs firefighters that there is a sprinkler system throughout the building to aid in firefighting efforts. This Hackensack New Jersey truss emblem must be permanently affixed to the left of the main entrance door at a height of between four and six feet above ground and shall be installed and maintained by the owner of the building.