Lateral force resisting system

Abstract

A moment frame is formed with two vertical T-shaped posts connected by several cross members secured perpendicular to the two posts forming a ladder-like frame. The cross members are formed of hot rolled steel and are permanently welded to cutouts in the posts. The top of the moment frame is attached to the building structure using any suitable mounting components. The base or bottom of the moment frame is attached to the foundation, or floor using any suitable mounting components.

We claim: 
     
         1 . A moment frame comprising:
 two coplanar vertical side members, each vertical side member having an inside web and an outside surface;   a plurality of lateral force resisting members secured to the inside webs between the vertical side members forming a plurality of generally rectangular openings therebetween, wherein the lateral force resisting members control rigidity and resist lateral forces applied to the structural frame; and   a plurality of holdown attachment points on the outside surface of each vertical side member.   
     
     
         2 . The moment frame of  claim 1  wherein the plurality of lateral force members are generally right circular cylinders formed of hot rolled steel.