Roof Truss Dimensions Uk

Pitched roof timber sizes.

Roof truss dimensions uk.

Square the result obtained in step 1. Adding 4 41 ans 1 44 gives 5 85 and the square root of 5 85 is 2 42 8 06 feet. The standard roof truss used for the majority of new build houses across the uk. Just as there are many types of roofs with many roof parts there are many different types of roof trusses this extensive article explains through a series of custom truss diagrams the different truss configurations you can use for various roofs.

These trusses are designed as attic style with larger sections of timber to support additional loadings which allow people to live within the truss zone. This sizing guide for roof rafters will help determine what you need for your small project. 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. Add it to the square of the result obtained in step 2.

35mm standard roof truss. 600 timber thickness mm. The following tables give details of the allowable spans and spacing for some of the more common timber sizes used in traditional roofing construction. There are several variables to consider when determining the proper rafter size.

Member size grade tc 1 4 4 7 97 tr26 bc 6 10 72 tr26 bc 10 2 72 tr26 wb 3 8 5 9 72 tr26 wb 4 8 4 9 72 tr26. 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. To use the truss form existing roof dimension calculator. The truss is a framework consisting of rafters posts and struts which supports your roof.

01706 212 238 northern 01785 282 833 midlands northern office. The tool will calculate the missing field. All truss images are for visual aid only and may not truly represent the roof truss supplied or designed by your chosen supplier. These trusses are used when habitable space is required within the room zone.

All the figures are based on roofing tiles or slates laid on timber laths over sarking felt. This is the minimum length of the outer board of your roof truss. To find out more about our roof trusses call our team on. This could be for fink trusses in a house construction or queenpost trusses for a garage.

We usually opt for the 35mm thickness in timber when designing standard roof trusses. Meanwhile the 46mm thickness option is used for attic trusses due to fire regulation guidelines. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. Enter your existing heel size or rafter size.