(425 ILCS 68/20)
Truss construction emblem.
(a) The truss construction emblem shall have a bright and reflective color
or be made of reflective material. The shape of the emblem shall be an
isosceles triangle and the size shall be 12 inches horizontally by 6 inches
vertically. The following letters shall be printed on the emblem in a
conspicuous size and color:
"F" to signify a floor with truss construction;
"R" to signify a roof with truss construction; and
"F/R" to signify both a floor and roof with truss construction.
(b) The emblem shall be permanently affixed to the left of the main entrance
door at a height between 4 and 6 feet above the ground and shall be installed
and maintained by the building owner.
(Source: P.A. 90-434, eff. 8-16-97.)