Abstract: A structural member having a top flange, a web and a bottom support. The top flange transitions into the web and the web transitions into the bottom support. The overall height of the structural member varies to accommodate structural panels, including insulation and acoustical panels, of similar or different thicknesses. In one preferred embodiment, an apparatus having a plurality of structural members attached to corresponding bearing plates is used as a sub-purlin to provide an economical roofing system which allows for retrofitting and easy detection and replacement of damaged roofing panels.

Abstract: A restorable breakaway post having a base post and a breakaway post which are connected with a breakable splice plate. The position of the base post is fixed with respect to ground or another suitable structure. A flexible member has opposing ends secured with respect to the base post and the breakaway post. Upon an impact force applied to the breakaway post, the splice plate shears and thus allows the breakaway post to move away from the base post. Under such impact force, the flexible member retains the breakaway post in a relatively close position to the base post. The broken splice plate can be easily replaced to restore the breakaway post to its initial condition.