By Juan C. Sánchez González 06-05-2022 00:04The OSB board (Oriented Strand Board), with which SIP panels are generally formed, is formed with wood chips that are joined together with a binder, once heat and pressure have been exerted on the material.These chips are oriented according to the placement position of the board;on the inner face the chips are oriented randomly or perpendicularly to the direction of the chips on the outer face which are generally oriented parallel to the length of the board.There is another type of board on the market, similar to OSB, called waferboard, but with smaller chips and without the orientation criteria of the former.The composition of the boards, as stated in the previous paragraphs, is based on wood chips, adhesives or binders and additives (insecticides, fire retardants and fungicides).These chips usually measure approximately 80 mm, with a thickness that does not exceed one millimeter.The adhesives can be Urea-melanin, Urea-formaldehyde and Phenol-formaldehyde.The dimensions of the plates may vary according to the manufacturer and the type of use to which they will be subjected, but a more or less standardized measure is 2,400mm x 1,200mm, 2,440mm x 1,220mm and on some occasions 3,660 x 1,220mm. , with thicknesses from 6 mm to 38 mm.In the manufacture of OSB, a distinction is made, in terms of the future use of the product, at the time of its manufacture, being called for such purposes as OSB for general/interior use, which includes use for furniture (OSB1);OSB for structural use in dry or humid environments (OSB2 and OSB3) and OSB for high performance in humid environments (OSB4).Apart from being one of the main components of the SIP system, OSB boards have other natural, alternative and complementary uses to the SIP system and that are inherent to them, such as roof support and roof diaphragms, floor slabs, facade closing , interior walls, partitions and internal divisions, prefabricated beams and double T box joist core.Also, and in a more domestic use, OSB is a useful material for making furniture frames, carpentry elements and even doors and windows.A common alternative use is as industrial packaging.In relation to the moisture content of the material itself, the UNE-EN 300 standard requires a moisture content between 2% (when it leaves the factory) and 12% for OSB 1 and OSB 2 boards, and between 5% and 12% for OSB 3 and OSB 4 boardsThe most readFollow us on our networks