narrower concept beam Concept beam grillage Concept beam structure Concept bending test beam Concept box girder Concept cantilever arm Concept cantilever beam Concept collar-beam roof Concept compression flange Concept compression member Concept continuous beam Concept corrugated web girder Concept flat roof construction Concept frame Concept frame beam Concept frame construction Concept frame corner Concept frame junction Concept frame structure Concept framework Concept gerber girder Concept honeycomb girder Concept log construction Concept multi-storey structure Concept pipe bend Concept plain beam Concept portal frame Concept post and beam construction Concept purlin roof Concept rafter roof Concept rolled girder Concept roof structure Concept solid wood beam Concept suspension tower Concept t-beam Concept tension member Concept tension member Concept three-hinged arch Concept tieback Concept timber beam floor Concept truss Concept two-centered arch Concept vierendeel girder Concept