Garage Roof Timber Sizes

All the figures are based on roofing tiles or slates laid on timber laths over sarking felt.

Garage roof timber sizes.

We set out illustrated diagrams setting out all key dimensions including width depth and more. Visit the roof framing page for more information on cutting roof rafters and visit the roof pitch calculator for determining rafter lengths based on rise and run. Discover the standard garage dimensions and sizes here for 1 2 3 and 4 car garages. Click on a span to generate a full calculation you can adjust the exact span.

The following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction. 1 2 timber strength class and joist size automatically calculate sizes suitable for supporting the loads below c16 cost effective for most applications c24 stronger more demanding c14 c18 c22 c27 c30 c35 c40. The previous 3 homes i lived in i did not have a garage. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.

I love having a garage. The first step in creating your roof trusses is to cut down the timber panels to the size that you want for your garage roof. Surveyors span tables for designing roof rafters. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

For pitched roofs flat roofs and ceiling joists. Rafter span tables use these tables to determine lengths sizes and spacing of rafters based on a variety of factors such as species load grade spacing and pitch. This span table is to the format and methodology given in bs 5268 7 2. It is often compared to slope but is not exactly the same.

You will need to continually measure the roof span and ensure that the size is ok with the building plan and project. Pitched roof timber sizes. Surveyors and structural engineers utilise data from tables below to help calculate the correct size strength and centres of roof timbers for the required spans and loadings.