Modular foundation assemblies for beds

A space-saving modular bed foundation assembly for supporting a mattress, the assembled foundation comprising:

• a pair of laterally spaced apart and parallel left and right side frames;
• a pair of longitudinally spaced apart and parallel left and right end frames;
• the left and right side frames each comprising upper and lower elongated tubular rigid metal side members spaced vertically apart and extending substantially parallel to one another, and a plurality of longitudinally spaced apart first rigid metal bracing members rigidly affixed in upright positions supporting the upper and lower tubular side members of each side frame;
• the left and/or right side frame having a narrow profile with a height sufficiently offset from the height of the end frames to provide an open space beneath the assembled foundation for receiving a second bed frame;
• the left and right end frames each comprising upper and lower elongated tubular rigid metal end members spaced vertically apart and extending substantially parallel to one another, and a plurality of laterally spaced apart second rigid metal bracing members rigidly affixed in upright positions supporting the upper and lower tubular end members of each end frame;
• separate one-piece corner connector assemblies for holding the side frames parallel to one another and the end frames parallel to one another to form a rectangular box-frame structure of the assembled bed foundation;
• the corner connector assemblies each comprising an upper corner connector having a generally right angle profile for slidably connecting end portions of the upper side members to corresponding end portions of adjacent upper end members, a lower corner connector having a generally right angle profile for slidably connecting to an end portion of an adjacent lower end member, and at least a pair of upright bracing members rigidly affixed to the upper and lower corner connectors to form a rigid corner assembly;
• a plurality of longitudinally spaced apart rigid metal slats extending parallel to one another between the left and right side frames, each slat including side frame connection members at opposite ends of each slat projecting in the same general direction away from the slat;
• and
• separate rigid slat connectors rigidly affixed to selected ones of the first bracing members and configured to slidably receive corresponding ones of the side frame connection members on the slats for holding the plurality of slats in fixed spaced apart positions extending parallel to one another between both sides of the side frames along the length of the box-frame formed by the assembled side and end frames of the foundation.