Garage Roof Timber Sizes

For pitched roofs flat roofs and ceiling joists.

Garage roof timber sizes.

There are several variables to consider when determining the proper rafter size. Metal roof sheets metal garage roof sheets are popular due to their ability to withstand extreme weather conditions affordability and ability to withstand high temperatures. Common joists sizes are 200 x 50mm 175 x 50mm and 150 x 50mm. This sizing guide for roof rafters will help determine what you need for your small project.

125mm x 16mm nominal size high quality scandinavian redwood tongue and groove boards. The sizing and spacing will depend upon the loads imposed on them and the required span. Size of roof joist 400mm 450mm 600mm 47 x 97 1 84 1 81 1 74 47 x 120 2 43 2 39 2 27 47 x 145 3 08 3 02 2 87 47 x 170 3 75 3 67 3 42 47 x 195 4 41 4 31 3 92 47 x 220 5 04 4 85 4 41 75 x 170 4 50. The joists will normally be placed at 400mm centres but no more than 600mm centres.

Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. 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. This is the distance between joist centres. We use 100mm x 38mm framework which run top to bottom in the roof rather than the purling effect which has a higher likelihood of twisting then we support these with 100mm x 38mm trusses.

Surveyors span tables for designing roof rafters. Garage roof sheets are made from a variety of materials and each material comes with its own benefits so it is important to select the best one for your garage roof.