Standard Spacing For Roof Studs

Typical rafter spacing codes will specify a minimum spacing of 16 inches 19 2 inches or 24 inches.

Standard spacing for roof studs. To determine how many trusses to create you will first need to measure both the width and the length of the structure you are building. Allowable spans vary according to wood species and the loads. Floor joists spaced on regular intervals span the areas between supports such as walls foundations girders and beams. Joist spacing in this design mode incorporates different types of wood used in ceiling construction including 2 grades of southern pine douglas fir and hemlock fir types which are the most common.

As with the joist size the building code for your structure will stipulate the proper spacing between floor joists. In other words the maximum distance it can cover without support from posts. The wrong spacing or wrong size of studs can compromise the stability and strength of the structure. The trusses should be a little longer than the exact width to allow for overhang and you will need sufficient trusses to mount across the length.

Builders aren t bound by standard rafter spacing measurements. Follow this guide to ensure the spacing and stability of your diy roof trusses. The code itself is determined by the engineering requirements of a particular building. The standard construction of interior framing in a home uses 16 inch on center oc spacing for ceiling joists.

While a 5 12 pitch roof is the standard if you are going to save money by spacing your studs at 24 inches a 7 12 roof pitch will fortify your walls to a greater extent than a 22 62 degree roof pitch. In some areas and in some situations it s permissible to use 24 inch spacing for two by four stud walls supporting only a roof above or for two by six walls supporting one story and a roof above. Rafters must be strong enough to hold the roof sheathing and the shingles. The determining factor of post spacing is the allowable span of your beams.

Normally floor joists are spaced 16 inches apart on center. Normal spacing is 16 inches on center from center to center though some floors may have joists on 12 inch or 24 inch centers. Consult the local building department for requirements in your area. Rafter and roof joist spacing is only one part of a complex roof design that works together to form a structure that meets building codes and can hold up the weight of the roof and roof load.