Drywall furring strip system

A structural unit in a building comprising a plurality of carrying channels and a plurality of furring channels attached to said carrying channels attached to said carrying channels at right angles, and means for supporting said unit in the building;

• each carrying channel comprising a web and a pair of substantially congruent tongues extending from opposite edges of the web, the distal edge of each tongue being parallel to the web, each tongue having a tab and an elongate finger, the edge of the tab tapering away from the distal edge toward the web and having a recessed seat substantially parallel to the web, the finger projecting from the edge of the tongue opposite the tab in generally parallel but spaced apart relationship with the distal edge, the finger having a retaining hook projecting toward the web and a seat in line with the recessed seat on the tab;
• each furring channel having a web and a pair of flanges extending from opposite edges of the web, the flanges having transversely aligned pairs of slots therein, the slots of each pair being spaced apart in alignment with the paired tongues on the carrying channel which extend into the furring channel, the fingers projecting through a pair of slots in one flange, and the tabs protruding through a pair of slots in the other flange.