Structural Steel Roof Members

Assembly halls gymnasium field houses.

Structural steel roof members.

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. Strutting beams support the roof members where there are no load bearing wall studs available. 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. 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.

They transfer the load of the roof to load bearing walls. 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. Purlins supports the roof deck and span between ribs. Strutting beams should only support roof loads and not be used as ceiling joists.

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. All have now become cost effective reliable and safe alternatives to more traditional structural framing materials. 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.

Structural steel members your work will require the use of various structural members made up of standard structural shapes manufactured in a wide variety of shapes of cross sections and sizes. Secondary framing fills in where structural steel isn t necessary. The portion of the roof contained between successive trusses is called a bay. 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.

Column a structural element that usually carries its primary loads in compression or tension parallel its axis. A top plate is nailed to the top of wall studs. 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. Perimeter tension ring domes and rings are supported by columns braced laterally or by bearing walls.