Structural Steel Roof Framing Details

Because the manufacturing process is fast there.

Structural steel roof framing details.

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. Truss a structural frame of steel shapes connected into an assembly that can support loads far in excess of beams and girders due in large part to the depth or height of the assembly. Eastern seaboard the gulf coast states california and hawaii. A truss is composed of chords main horizontal members vertical members and diagonal members.

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. A single typical mill in one working shift can produce 20 km of straight highly uniform accurate product. The irc and ibc provide prescriptive framed shear wall designs that may be incorporated into the building design to resist lateral loads. Flat roofs may also need to be designed for live loads if people can walk on them.

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. 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. Cad details metals 05 12 00 structural steel framing structural steel framing cad drawings free architectural cad drawings and blocks for download in dwg or pdf formats for use with autocad and other 2d and 3d design software. 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.

Such methods use a 4 foot design module which governs a 16 inch spacing of joists studs rafters and panel sheathing products. 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.