[caption id="attachment_1275" align="alignnone" width="205"] Glideaway Bed Frame[/caption] [caption id="attachment_1276" align="alignnone" width="231"] Mantua Metal Bed Base[/caption]   Steel Bed Frames For two or three generations, most beds consist of a mattress, a foundation (box spring, box platform or slatted box) and a bed frame. The bed frame for these is usually side rails, cross bars, and (for larger sizes) a center beam, made of angle steel. These frames have...