Garage Roof Trusses Spacing

If you plan to heat the garage and insulation is to be placed between the rafters the space must be wide enough to provide for the thickness of the insulation.

Garage roof trusses spacing.

Attic trusses have a rectangular shape inside each truss. The rise will be the elevation change over the 12 inches. Once you ve calculated the number of trusses you will need you should purchase the lumber. The horizontal bottom chords of most garage trusses are designed to carry the weight of drywall and insulation.

If interior moisture were improperly managed for example if a clothes dryer were vented into a finished garage area instead of to the outside a 16 inch on center truss spacing would be more forgiving of the bad practice. So the space between rafters can be greater without reducing the maximum span. Rafters are placed at 12 16 or 24 inch intervals. Sheathing should be a minimum of 19 32 inch thick.

In a garage the garage roof truss spacing is usually made in accordance with the local building laws after all a garage is an occupied space as much as a house is. While this article focuses on configurations we also have a very cool set of illustrations showcasing the different parts anatomy of roof trusses. Putting the trusses into place. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame.

Most are spaced between 18 26 inches apart. Check your local building code for the specific interval as it can vary by area. If the roof slope is steeper than 9 inches in 12 inches of run it doesn t take much width to end up with a nice room 12 feet wide with an 8 foot ceiling. But in general it doesn t matter if the truss spacing is at 12 16 or 24 inches.

Is a safe estimate. In terms of how this generally operates it is worth noting that that too is with the same two by four material and the trusses are also going to be around the same spacing that is twenty four inches off centre. That means you could lay a 2 x 4 ft. Pitch slope the pitch or slope is the incline of the roof expressed as a fraction describing the rise over the run.

Common spacing for trusses on this type of building is often between 2 and 4 feet but trusses built with advanced designs may allow spacing as great as 8 or 12 feet. Look at this photo of the space created by attic trusses at my home. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs. Never attach roof sheathing with staples.

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. So if your ceiling is unfinished you have some excess carrying capacity up there. I have this above my own garage. Of stuff on it.

The typical thickness range for sheathing is 3 8 to 3 4 inch. 8d ring shank nails should be used instead. Scrap of plywood over the chords and set about 40 lbs.