Roof Truss Sizes Uk

Enter two of the span height pitch fields.

Roof truss sizes uk. This could be for fink trusses in a house construction or queenpost trusses for a garage. To find out more about our roof trusses call our team on. 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. 35mm standard roof truss. This sizing guide for roof rafters will help determine what you need for your small project. Pitched roof timber sizes.

Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter. 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. The standard roof truss used for the majority of new build houses across the uk. The room size will vary depending on the width and slope of the truss.

A gambrel room in attic truss also provides extra living space while giving your roof a barn like appearance. 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. Add it to the square of the result obtained in step 2.

These trusses can also be used for garages and extensions as well as self build projects. To use the truss form existing roof dimension calculator. 600 timber thickness mm. 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. Meanwhile the 46mm thickness option is used for attic trusses due to fire regulation guidelines. We usually opt for the 35mm thickness in timber when designing standard roof trusses. Adding 4 41 ans 1 44 gives 5 85 and the square root of 5 85 is 2 42 8 06 feet.

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. Square the result obtained in step 1. Trusses must be designed for any special loading such as concentrated loads from hanging partitions or air conditioning units and snow loads caused by driftingnearparapetorslide offfromhigherroofs. This is the minimum length of the outer board of your roof truss.

Multiply multiply 2 1 by 2 1 to get 4 41 and 1 2 by 1 2 to obtain 1 44. Enter your existing heel size or rafter size. 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. Spans for 2x4 top chord trusses using sheathing other than plywood e g.