Abstract: A building structure is provided having a combination of a support post with a beam having a generally triangular cross-sectional shape with outwardly directed longitudinally extending flanges at the base and a channel formed along the peak of the beam, roofing sheets on the beam which is supported by a support post which is a rolled rectangular cross sectioned sheet metal component each side of which has a centrally located longitudinally extending stiffening channel formed therein. There is also provided a wall plate between the post and the beam, the wall plate comprising a component rolled to generally channel cross-section one flange of which has an outwardly extending step terminating in a section extended parallel to the channel flanges, and for the flanges to be inclined to the web of the channel.