Roof Truss Timber Sizes

The truss is a framework consisting of rafters posts and struts which supports your roof.

Roof truss timber sizes.

Shop our wide selection of stock and custom roof trusses to complete your building project available in a variety of styles and sizes. 35 timber size information. A timber roof truss is a structural framework of timbers designed to bridge the space above a room and to provide support for a roof trusses usually occur at regular intervals linked by longitudinal timbers such as purlins the space between each truss is known as a bay. 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.

A project of this nature would typically cost 982 80 as indicated by our roof truss instant quote estimator below. Structural calculations for timber joists timber beams glulam beams flitch beams using the latest design codes. 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. This is the right way to fix truss clips connecting the rafter and.

Standard roof truss general load settings. Pitched roof timber sizes. 0 250 kn m ceiling live load 0 250 kn m tank load 0 450 kn max tile batten centres. Imposed loads roof snow load and short term point load altitude not exceeding 100m.

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. 0 75 kn m snow load. For a 64m2 house which is a standard 3 bedroom new build you would need 14no 35mm standard roof trusses with a span of 8000mm with a pitch of 35 degrees. 0 785 kn m snow load.

Automatically calculate suitable rafter sizes enter a specific rafter size 1 3 timber strength. 600 timber thickness mm. Rafters have a tendency to flatten under gravity thrusting outwards on the walls. 360 mm general truss information.

Tr26 grade timber has been a cornerstone product of timber roof truss manufacturing for a number of years and therefore is the only kind of timber that we use and provide for our customers. The following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction. All the figures are based on roofing tiles or slates laid on timber laths over sarking felt. Click to add item 26 spreadweb residential roof truss 6 12 pitch 87 to the compare list.

The cost of roof trusses.