Lastly, remember that we are not talking about trusses in this article – just rafters. The reason for this is that flat or shallow roofs withstand much more abuse and loads than steeper roofs, making wider shed roof rafters a necessity. Many shingle manufacturers recommend no less than 2:12 when installing. Many roof material manufacturers have minimum pitch ratings for their products. 2×4 rafters are not strong enough for low pitched roofs under any circumstance, so avoid if you are building a shed with a flat or very shallow roof. If you look at the chart linked above, you’ll notice that for roofs that are less than 3:12, the chart does not include 2x4s as an option. What does 3:12 mean? It means a roof that rises 3 inches for every 12 inches of horizontal run. When talking about framing a shed roof with rafters, you’ll first need to know how steep your roof is – in other words, what is the pitch or slope of your roof? Most rafter span charts are organized into 2 sections: roofs with a slope less than 3:12 and roofs greater than 3:12. Should I Use 2×4 or 2×6 Rafters for Shed Roof?.If you have a single sloped shed roof, then using 2×6 rafters is a better bet because the price differential won’t be huge and your shed roof will have a much greater load capacity.īelow we’ll take a closer look at when to use 2×4 and 2×6 lumber for your shed roof, and hopefully, you’ll be able to make a more informed decision on what type of lumber you should use when building your shed roof rafters. If you have a simple gable shed roof, then using 2×4 rafters makes more sense unless you have a very large shed. For roofs that will experience heavy snow or wind and will span the same distance, use 2×6 rafters. For roofs that won’t experience heavy snow loads, a gable roof can span up to 22’ with 2×4 rafters. You can use either 2×6 or 2×4 rafters for roofs with a 3/12 pitch or greater, but it depends on the overall size of your shed. However, one of the main issues you will encounter when cutting rafters is, should you use 2×4 or 2×6 rafters for your shed roof? They require less lumber than trusses and once one is cut, all the others follow the same cut. Whether your challenge is creative or structural, inside or out, choosing to use a timber system in your design is always a sound solution which assures ageless style, natural beauty, and enduring strength and value.Rafters are a simple, straightforward way to frame the roof of your shed. Should engineering necessitate or style preference dictate, we are fully capable of incorporating steel as either external plate and bolt systems or internal knife-plates with hidden reinforced steel joinery. Prominent in our work is a variety of wood-to-wood joinery styles including traditional wood-pegged mortise and tenon, along with dove-tailed connections. Whether you select timber trusses for the great room, kitchen-dining area, entryway, outdoor shelter or porch, Harmony’s timber trusses add old-world craftsmanship and lasting value to your residential or commercial project.Įach system is created one-at-a-time combining artisan craftsmanship with the industry’s most advanced CNC technology. Each timber frame system is designed to be economically integrated into virtually any structure, regardless of what type of wall system you choose.
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