Both have timber chords but pryda longreach uses all timber webs while pryda span uses metal webs for the diagonals and timber webs for the verticals.

Timber roof trusses dimensions. C maximum truss span 16 m. 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. B maximum roof pitch 45 degrees. Most basic timber roof trusses timber dimensions are 90x35mm and start at strength grade mgp10 old grading called f5.

A residential structures ncc building classes 1 2 3 and 10 and light commercial structures. This could be for fink trusses in a house construction or queenpost trusses for a garage. There are two different types of web systems for these trusses. We usually opt for the 35mm thickness in timber when designing standard roof trusses.

If the truss requires a bigger timber size due to the load it is to carry the bigger size is usually applied to the bottom chord first leaving the top chord and webs at 90x35mm. The truss is a framework consisting of rafters posts and struts which supports your roof.

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