Steel Roof Rafter Sizes

Get the strength of steel with the ease of building with wood.

Steel roof rafter sizes.

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. 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. The rise will be the elevation change over the 12 inches. Pitch slope the pitch or slope is the incline of the roof expressed as a fraction describing the rise over the run.

Gable lean to and header. Bar joist are 24 00 per foot on sizes of 10 16 20 and 24 feet. Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. Crating and bundling for a box truck this is necessary when not shipping on a flatbed truck.

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. Design of single span rafters in roofs in houses office buidlings schools and other structures. Pick list all suitable timber and steel sections to design across all timber and steel sections. 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.

First choose from four different steel panels. If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center. Press design to obtain sizes. Steel trusses come in three types.

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. Everything you need to build the perfect space. Menards is your 1 source for all your steel roofing needs. 2018 by truss supply llc.

The run or the base number is 12 inches. 30 feet is available for 27 00 per foot. Clear spans up to 80 feet. 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.

See some projects blog. Whether you re building a new home or want to replace your existing roof there s no better option than steel.