Abstract: An improved structural framing system and associated method of construction is disclosed wherein an open web dissymmetric steel beam fabricated having a plurality of trapezoidal openings formed along the web thereof between a narrowed, thickened top flange and a widened bottom flange is horizontally disposed and supported between adjacent vertical columns erected on conventional foundations. The dissymmetric beam is preferably fabricated from a standard rolled, wide flange beam split longitudinally according to a specific cutting pattern to produce substantially identical open web beam sections having a single wide flange. A flat bar plate is then welded along the open web beam section to provide the top flange and thereby produce the dissymmetric beam for use in the present system.

Abstract: An improved structural framing system and associated method for constructing same wherein a specially configured dissymetric steel beam is horizontally disposed and supported between adjacent vertical columns erected on conventional foundations. The dissymetric beam is fabricated having a compressed, block-like top flange formed opposite a substantially flattened bottom flange and integrally connected thereto by an intermediate web. Standard hollow core sections of precast, prestressed concrete plank spanning perpendicular to the dissymetric beam are disposed on either side of the beam and together assembled thereto so that the web of the beam is disposed centrally between facing edges of the plank sections with the bottom flange of the beam supporting the lower surface of the plank and the top flange substantially aligned with the upper plank surface.