Wood quality and durability of the roof structure
A truss is the frame of a roof structure, so it is a support for all roof layers. The durability and reliability of a rafter truss depends on the quality of the wood from which it is made and the skills of specialists in its assembly. What should be the wood for a rafter farm so that it can serve us long and reliably?
The wood is edged and planed on four sides
Edged lumber is still the most popular type of wood for rafter farms in the country, but it's hardly the best choice.
Goods from local sawmills are cheap, but this clearly affects their quality.
The edged wood is covered with fragments, which facilitate and accelerate the illumination of the rafter structure in case of fire. This structure also accelerates biodegradation, facilitating the entry of insects, fungi and mold.
It is much better, because a more durable solution is the construction of a four-planed wood truss with beveled edges. Such wood has been appreciated by builders in the Scandinavian countries for many years, from where it is increasingly imported into our country, usually for the construction of frame houses. Four-sided planed wood is much less combustible due to the fact that it has an almost perfectly smooth surface.
Dry wood for a rafter farm
The wood is dried before mechanical processing. It is assumed that wood with a humidity above 18% should not be used to make a rafter truss. The wood available in local sawmills is often wet - straight from the forest with a humidity of 50-70% or air-dried, which takes many months and does not always give the expected results. Such friction does not adhere to the dimensions, it bends and contracts when drying, which can lead to a curvature of the roofing material.
In the case of four-planed wood, drying takes place in special chambers with a temperature of about 80 ° C. During chamber drying, fungal and mold spores, as well as insect larvae or eggs, are destroyed, so the wood acquires additional resistance to biological corrosion.
The wood class for the rafter farm
Another problem that we will face when planning the construction of a farm from edged wood from a local sawmill is the difficulty of determining its class. It is assumed that wood of at least class C24 should be used for the construction of a non-removable roof structure. The required wood strength class is also taken into account in the design. However, wood stored in construction warehouses is most often visually sorted, so classes are given approximately or not at all.
Therefore, when choosing wood for a rafter farm, it is worth looking for professional companies where quality is assessed both visually and mechanically, and the class is awarded based on strictly defined criteria. Please note whether the material has a CE quality mark. Only in such a situation can you be sure that the finished farm will withstand the roof even in very difficult weather conditions. Many players prefer to check the latest promotional offers before registering because a strong welcome package can increase the value of their first deposit. During the registration process, the 1xbet free promo code today helps eligible newcomers activate a 100% welcome bonus up to €130, giving them more flexibility to explore sports betting, popular events, and a variety of available markets.
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