Steel Roof Rafter Sizes

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Steel roof rafter sizes.

Design of single span rafters in roofs in houses office buidlings schools and other structures. 2018 by truss supply llc. Pitch slope the pitch or slope is the incline of the roof expressed as a fraction describing the rise over the run. 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.

Pro rib premium pro rib pro snap and architectural premium pro rib next select from 25 solid colors or 5 architectural colors. Alternatively design in a specific timber or steel material type. 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. Bar joist are 24 00 per foot on sizes of 10 16 20 and 24 feet.

Clear spans up to 80 feet. Everything you need to build the perfect space. 30 feet is available for 27 00 per foot. 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.

Gable lean to and header. The run or the base number is 12 inches. Whether you re building a new home or want to replace your existing roof there s no better option than steel. 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.

If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. Pick list all suitable timber and steel sections to design across all timber and steel sections. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. The rise will be the elevation change over the 12 inches.

Get the strength of steel with the ease of building with wood. Press design to obtain sizes. Snoot truss click picture to view snoot truss. Menards is your 1 source for all your steel roofing needs.

As a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. 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.