Structural Steel Roof Members

The portion of the roof contained between successive trusses is called a bay.

Structural steel roof members.

4 code the code of standard practice for steel buildings and bridges as published by the american institute of steel construction. The portion of the truss lying between two consecutive joints is called a panel. The member spanning from truss to truss which is meant to carry the load of the roofing material and to transfer it on the panel points is called a purlin. Perimeter tension ring domes and rings are supported by columns braced laterally or by bearing walls.

Purlins supports the roof deck and span between ribs. Components and cladding members which include girts joist purlins studs wall and roof panels fasteners end wall columns and end wall rafters of bearing end frames roof overhang beams canopy beams and masonry walls that do not act as shear walls. All have now become cost effective reliable and safe alternatives to more traditional structural framing materials. Other steel members steel joist institute standard specifications 2010 steel cables asce 19 2010 steel deck institute diaphragm design manual ddm04 2015 instructional material complementing fema 1051 design examples steel structures 36.

A top plate is nailed to the top of wall studs. Column a structural element that usually carries its primary loads in compression or tension parallel its axis. 7 in the layout of truss systems it is more preferable in terms of economy and efficiency to have the shorter members in compression and the longer members in tension. Strutting beams support the roof members where there are no load bearing wall studs available.

Design of roof purlins 6 for efficient structural performance it is recommended that the truss span to depth ratio be kept between 10 to 15. Providing the stabilizing members that prevent the main frame from twisting out of shape secondary components can also contribute to the structural support and provide the means to attach wall roof and interior elements. Finally the cold rolled process for producing steel truss members now enables low cost production of steel floor trusses steel roof trusses entire steel truss buildings and the elements used in the design of steel truss bridges. Column base usually a thick plate at the bottom of a column through which anchor bolts mechanically connect the column and transfer forces to the.

Spans up to 400 in diameter. Strutting beams should only support roof loads and not be used as ceiling joists. Used for large circular areas. Assembly halls gymnasium field houses.