Roof Truss Span 40 Feet 6 12 Pitch

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Roof truss span 40 feet 6 12 pitch.

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. Roof truss span tables alpine engineered products 15. Up to 40 open framing for plumbing. The steeper the roof the more expensive the trusses get because the longer the boards get and the more roof area increases.

The vertical rise of the top chord per 12 horizontal inches is the roof pitch or slope. If you can t get the heel height most residential trusses will have a 3 top cord. Shop roof trusses spacer floor truss. Over 51 sizes styles in stock.

Bottom chords is at least 3 12 or the bottom chord pitch is no more than half the top chord pitch. While pitch and slope are used interchangeably they are not the same span also known as gable width this is based on the total footprint of the house and refers to the distance between two exterior walls. Custom trusses up to 100 span. Pitch this is the incline of the roof expressed as a fraction.

6 12 2 12 40 43 59 42 49 62 45 56 66 48 57 71 6 12 2 5 12 37 38 52 38 44 57 41 50 61 44 52 66. For example 4 12 pitch means 4 inches of rise in 12 inches of run. Depending on your roof slope add 4 to 5 inches for heel height. Truss capacity is listed by pounds per square foot based on the following load rating criteria.

Use of manufactured roof trusses can dramatically cut labor costs when framing a gable roof compared to building rafters. 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 materials ceiling fans etc. Trusses can be constructed with smaller sized lumber than rafters and often their cost is not significantly higher than normal rafters. Dec 15 2013 free truss plans.