Patent ID: 7574838

Claim:
A suspended ceiling comprising: a profile rail comprising: an elongated planar base body comprising an elongated web and a bottom chord, said web having an elongated top longitudinal edge and an elongated bottom longitudinal edge spaced apart and parallel to said top longitudinal edge, said bottom chord having a first and a second elongated planar bottom chord section, said first bottom chord section extending perpendicularly and continuously outwardly from said bottom longitudinal edge of said web, and said second bottom chord section having a predetermined width, a plurality of incisions formed through said web at longitudinally spaced intervals along said web, each incision having a portion which extends upwardly into said web by a distance substantially the same as said predetermined width of said second bottom chord section and each incision having two spaced ends which terminate at said bottom longitudinal edge of said web, each incision forming a material section from a portion of said base body, each material section being bent outwardly from said web to a position to form said second bottom chord section which is coplanar with said first bottom chord section, said base body, said material sections and said bottom chord being of a one piece construction, and a screening strip disposed over a lower side of said bottom chord, a plurality of ceiling panels, each panel having a plurality of edges, said edges of said panels being supported by an upper surface of said material section or by an upper surface of said bottom chord of said profile rail.