Abstract: A bed frame constructed of detachable and interchangeable components to enable the width of the bed frame to be varied to supportingly receive standardized bedding, box springs, or the like, of different standard widths by interchanging components. Unique detachable interconnections are provided to enable assembly and disassembly of the bed frame and variation in its width without the use of tools or separate fastening clamps, nuts, bolts, or the like. The bed frame includes unique side rails of triangular seamless tubing having telescopically attached end brackets for supporting a headboard and/or footboard and a supporting leg assembly permanently attached adjacent each end of the side rails with box spring supporting clips detachably supported from the rail and leg assembly by the use of a socket in the upper end of the leg and a depending tongue on the box spring clip.