Structural Steel Roof Framing Details

Flat roofs may also need to be designed for live loads if people can walk on them.

Structural steel roof framing details.

A single typical mill in one working shift can produce 20 km of straight highly uniform accurate product. M1 cabinet blocking detail m2 wiring and piping. The first approach to achieving a strong durable struc ture involving economical use of materials is to follow a basic modular plan for layout and attachment of framing members. Cfs light frame construction g500 11 guidelines for inspecting cfs structural framing in low rise buildings g800 12 astm standards for cfs g801 13 astm a1003 no cause for rejection g802 13 aisi section a2 2 other steels g900 15 design methodology for hole reinforcement of cfs bending members j100 11 cfs floor joists.

Purlins girts and roof deck the substructure to which the metal panels are fastened must be properly spaced and sufficiently thick to provide a roof or wall system able to meet required design loads. R7 roof eave and soffit detail r8 rafter and joist bridging r9 collar tie at rafter detail r10 rafter brace connection detail r11 roof framing with wood tail extension r12 wood truss bearing on steel wall r13 collector block detail r14 non aligned roof wall framing r15 hip beam miscellaneous. Eastern seaboard the gulf coast states california and hawaii. A truss is composed of chords main horizontal members vertical members and diagonal members.

Both use framing members such as dimensional lumber engineered lumber or light gauge c shaped steel members surfaced with structural sheathing typically plywood or osb. Because the manufacturing process is fast there. Unlike structural steel shapes that are hot rolled into shape manufacturing of lightweight steel framing is carried out at ambient temperature hence the term cold formed. The irc and ibc provide prescriptive framed shear wall designs that may be incorporated into the building design to resist lateral loads.

Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters and panel sheathing products. Roof framing must be designed to hold up a structural load including what is called dead load its own weight and the weight of the roof covering and additional loading called the environmental load such as snow and wind.