Papercret Roof Trusses

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Papercret roof trusses.

Pre manufactured stock trusses are constructed with spruce pine fir spf or southern yellow pine syp lumber. When it hardens papercrete is lightweight a good insulator up to r 2 per inch holds its shape even when wet and is quite strong with a compressive strength of 300 pounds per square inch psi. It can be used in the rafters of the trusses for insulation or sprayed to the underside of the roof itself but needs to be protected by a roof. These trusses are positioned on the top plate of the endwall so the entire bottom chord is supported by the wall.

Spaceman s domes are built strong so they can withstand the extra weight of added moisture between long intervals of drought and drying. These trusses the meet building code criteria as specified by structural building components of america sbca and the truss plate institute tpi. 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. They are designed at a 4 12 pitch to be spaced 2 foot on center.