Steel Roof Rafter Sizes

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Steel roof rafter sizes.

Pitch slope the pitch or slope is the incline of the roof expressed as a fraction describing the rise over the run. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. See some projects blog. Gable trusses are in stocked in a 4 12 slope x 20 24 30 and 40 width and special order up to 50 wide 60 for tubing trusses.

Bar joist are 24 00 per foot on sizes of 10 16 20 and 24 feet. The run or the base number is 12 inches. Alternatively design in a specific timber or steel material type. Whether you re building a new home or want to replace your existing roof there s no better option than steel.

For example a slope of 6 12 means for every 12 inches of horizontal distance the slope of the roof will rise 6 inches vertically. Fasteners for asphalt shingles shall be galvanized steel stainless steel aluminum or copper roofing nails minimum 12 gage 0 105 inch 3 mm shank with a minimum 3 8 inch diameter 9 5 mm head complying with astm f1667 of a length to penetrate through the roofing materials and not less than 3 4 inch 19 1 mm into the roof sheathing. Steel trusses come in three types. Pick list all suitable timber and steel sections to design across all timber and steel sections.

30 feet is available for 27 00 per foot. Snoot truss click picture to view snoot truss. Gable lean to and header. Clear spans up to 80 feet.

Everything you need to build the perfect space. Pro rib premium pro rib pro snap and architectural premium pro rib next select from 25 solid colors or 5 architectural colors. Our roof rafter calculator tools are handy for calculating the number of rafters needed rafter length calculator lineal feet of rafter board feed in ridge and sub facia and the total board feet in the roof. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.

The rise will be the elevation change over the 12 inches. Crating and bundling for a box truck this is necessary when not shipping on a flatbed truck. Press design to obtain sizes. 2018 by truss supply llc.

For example in the rafter span table below the highlighted cell in the 40 live load table indicates that 2 x 8 southern yellow pine joists that have a grade of 2 that are spaced 24 apart can have a maximum span of 10 feet 3 inches 10 3 if designing for a live load of 40 lbs ft 2. Design of single span rafters in roofs in houses office buidlings schools and other structures.