Suspended ceiling having a concealed suspension grid and lay-in metal panels supported thereon

A suspended ceiling system for a room which comprises

• a plurality of inverted T-shaped members suspended from the structural ceiling of the room and extending across the room, each said T-shaped member having a horizontal base portion;
• a plurality of open metal ceiling panels having opposed first and second side walls, opposed first and second end walls and a bottom wall;
• said first side wall of said panel having a flange projecting therefrom in a direction away from said second side wall, said flange being parallel to and spaced from said bottom wall, said first side wall further having a plurality of longitudinally spaced apart detents formed therein and projecting in a direction away from said second side wall, and said second side wall has a plurality of open notches therein spaced apart such that the detents of said panel will be received in the notches of an adjacent abutting panel, said flange and said detents being spaced apart to define a slot therebetween;
• said end walls of a said panel having first and second ends adjacent said first and second side walls, respectively, said end walls having a lower portion integral with said bottom wall and an upper portion spaced from said lower portion at said end wall second end to define an open slot in each said end wall parallel to and spaced from said bottom wall, the opening of each said slot facing said second lower portion at each said end wall second end;
• and
• said panels being supported by said inverted T-shaped members with the flange of a said panel resting on and supported by one side of the horizontal base portion of a said T-shaped member, said one side being received in said slot formed between said flange and said detents while the other side of said horizontal base portion is received in the slots of the end walls of an adjacent abutting panel, whereby the joints between adjacent panels are aligned.