Timber Roof Trusses Dimensions

The following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction.

Timber roof trusses dimensions.

Member size grade tc 1 4 4 7 97 tr26 bc 6 10 72 tr26 bc 10 2 72 tr26 wb 3 8 5. We usually opt for the 35mm thickness in timber when designing. The truss is a framework consisting of rafters posts and struts which supports your roof. This table is considerably more useful that the one that was in the previous 1990 edition of the regulations as not only maximum truss spans are indicated but also the allowable and recommended pitch of the roof and the member sizes and grades of timber that are specified in sans 1783 2.

But 99 of the time a roof truss is going to give you so much more. 600 timber thickness mm. Click to add item 24 spreadweb residential roof truss 5 12 pitch 87 to the compare list. The pros of using roof trusses instead of stick framing.

35 timber size information. The important point to keep in mind when you use your truss calculator is that every truss calculation is completely unique and is based on the size of your roof and its specific dimensions. Shop our wide selection of stock and custom roof trusses to complete your building project available in a variety of styles and sizes. All the figures are based on roofing tiles or slates laid on timber laths over sarking felt.

Roof truss span tables alpine engineered products 15 top chord 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 2x4 2x6 2x6 bottom chord 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2x4 2x4 2x6 2 12 24 24 33 27 27 37 31 31 43 33 33 46 2 5 12 29 29 39 33 33 45 37 38 52 39 40 55 3 12 34 34 46 37 39 53 40 44 60 43 46 64 3 5 12 39 39 53 41 44 61 44 50 65 47 52 70. Standard roof truss general load settings. Pitched roof timber sizes. The pros of using roof trusses drastically outweigh the pros of stick framing.

0 250 kn m ceiling live load 0 250 kn m tank load 0 450 kn max tile batten centres. Here are the pros of trusses. A gambrel room in attic truss also provides extra living space while giving your roof a barn like appearance. Sure there may be an instance where stick framing is your only option and that is understandable.

Gable room in attic trusses provide an economical way to add extra living space to your home or garage. Just enter the dimensions of the roof rise and run to get started. The room size will vary depending on the width and slope of the truss. Our timber wood roof trusses are made from the strongest grade of timber tr26 grade timber.

If you re building rafters and aren t sure where to start when determining the length of your lumber you re in the right place our rafter stock size calculator shows you how long your rafters should be so you ll know what you need in terms of framing lumber dimensional lumber studs and more.