Pitch Roof Truss Specs

Top chord live load snow and other temporary loads top chord dead load roofing materials weight of the truss itself other permanent items attached to the roof bottom chord live load storage and bottom chord dead load insulation ceiling.

Pitch roof truss specs. These loads can be other trusses that attach by sitting on top of the girder or they may attach to the side of the girder using truss hangers. Girder trusses are designed to carry additional loads other than standard roof loads. Shop roof trusses spacer floor truss. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Up to 40 open framing for plumbing. Custom trusses up to 100 span. See the image below for more explanation on rise run and pitch.

The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases. Flat the most economical flat truss for a roof is provided when the depth of the truss in inches is approximately equal to 7 of the span in inches. Over 51 sizes styles in stock. You will also incur additional costs because it is much harder to deck and shingle a roof that is 12 12 pitch versus a 4 12 roof.

Rise and run means that a 6 12 pitch roof has 6 of rise vertical for each foot of run horizontal. These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi. 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. Truss capacity is listed by pounds per square foot based on the following load rating criteria.

This online truss calculator will determine the all in cost of your truss based on key inputs related to the pitch width and overhang of your roof. A pitch truss with a sloping or non sloping vertical interior ceiling detail. It can take various forms and often used for aesthetic purposes adding height and focal interest to the ceiling. Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber.

A truss with the same pitch and heel on both sides and a peak at the center is called a common truss. A 12 in 12 pitch is a steep 45 degree angle roof. The standard roof truss spacing is 2. Pitch depth spans in feet to out of bearing spans in feet to out of bearing 5 12 38 47 57 39 51 59 42 56 63 45 54 68.

Roof truss span chart. This is the distance between trusses.