BEAM OF CEILING FORMS Russian patent published in 2000 - IPC

FIELD: construction industry. SUBSTANCE: invention may be used as forms supporting beam for concreting of cast-in-situ ceilings. Flange beam of ceiling forms has symmetrically located roll-formed sections with walls rigidly connected with each other to form post and bent aside end parts forming its flanges in the form of rectangular tray with wooden bar laid in it. Walls of sections are welded to each other or riveted in their upper and lower parts to form closed longitudinal channel with members convex to each other in whose middle part sleeves with bottoms are stamped towards longitudinal channel. Sleeves with bottoms are spot-welded with each other. Wooden bar is in the form of low tee whose flanges are embraced from sides and from below by bent aside end parts of roll-formed sections. In this case, tee post of wooden bar tee protrudes beyond dimensions of roll-formed sections. Made in side surfaces of flanges of roll-formed sections and in wooden bars are through holes in which solid or tubular rivets with rolled out ends are installed. EFFECT: longitudinal stability of beam wall and increased reliability of fastening of wooden bar in tray of roll-formed sections for longitudinal shift force and separation from tray surface. 4 cl, 1 dwg