Roof Truss Spacing Requirements Slate Roof

Where snow loads and superimposed loads are practically absent larger spacing may be provided.

Roof truss spacing requirements slate roof. Spacing must be done according to sans 10407. For thatched roofs laths must have a minimum diameter of 25 mm and they must comply with the requirements of sans 1288. For example 25 x 50mm battens are required for single lap modern roof tiles laid on rafters with a 600mm span. These standards are as follows.

There are many roles played in the design and delivery of residential wood roof trusses. Typical roof truss spacing means that they are usually about 24 inches from centre which means at the centre of one truss there will be a two foot gap or twenty four inch gap until the centre of the next truss. The spacing of trusses is determined by the spacing of the columns. The spacing of trusses may be about 1 3 to 1 5 of the span.

Other relevant factors include the type of wood being used for the rafters the size of the rafters and the load that the rafters need to support. The more complex the truss framework is the greater quantity of these joints will be required. The best size board to use is 1x4 pieces that are 10 feet long. The spacing between rafters in a given building is part of the engineering calculations that determine the required structure of the roof.

When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps. We design roofs using the roofcon licenced software this allows for the design of custom roof trusses to the specifications set in place international truss systems structural roof truss package also known as roofcon trusscon quotecon is used for the design detailing estimating manufacture and 3d visualisation of complex trussed rafter roofs. Roof trusses things to consider. Generally speaking 20degrees is the lowest advisable pitch for a slate roof depending on the size of the slates and how much that the roof is exposed to moderate weather conditions.

These steel joints are needed to support the overall truss. Finally the truss calculator will compute the best dimensional method to connect the pieces of the truss with steel joints and a bridge. If a thatched roof is constructed with gables without hips valleys or dormer windows it must have a pitch of 45 degrees and a clear span that is no more than 6 m. This article discusses the scope of work required of the various roles as defined by the various codes and standards for residential roof truss.

Engineers can play various roles in this process and it is essential to understand which role you play. For instance if you are spacing your trusses 18 inches apart make a mark 18 inches from the edge. The same thing is true for the bridge of the truss.