We tell how to unmistakably determine the quality of the glued bar.
The basis of the quality of the glued timber primarily is the quality of the source raw material. Experts believe that the Northern Forest in many indicators is the best. In trees growing in northern latitudes, due to the impact of climatic features, wood has increased density and durability.
The second important point, determining the quality of the final products, is thorough preparation and processing of gluing lamellas. Before gluing wood, bits and damaged areas are removed from it, making a high-quality bar differ in perfect appearance and accurate geometric dimensions.
Modern equipment and accurate compliance with the entire technological chain is the key to high quality of final products.
In the Russian technical regulatory system, the requirements for glued wood and to wooden elements of low-rise buildings are given in several state standards (GOST), in the construction norms and rules (SNiP) and crops (SP). The entire glued grommet made must comply with these regulatory documents. It would seem that it's easier: the developer checks the presence of a certificate of conformity to the material from the manufacturer's company, and can be confident in his quality. However, not everything is so unequivocal.
Sometimes the material certification is made not on the basis of the documents listed above, but on the basis of the (technical conditions) developed by the manufacturer itself. Will these that correspond to state regulations or the manufacturer's enterprise decides to choose the way to simplify the requirements?
In international practice, the certification system is an integral part of any manufacturing industry. Despite the fact that there are a large number of independent institutions that specialize in testing and certifying the compliance of the object with the requirements of technical regulations and standards, one of the most authoritative is OTTO-GRAF-Institut (MPA) from Stuttgart. It certifies in accordance with the EN 14080 standard for glued wooden structures, developed by the European Committee on Standardization. The requirements of the system of European standards for glued elements and structures cover all components of the process: wood, glue, equipment and temperature and humidity regime in the industrial premises; Formaldehyde safety in structural elements; Certification and labeling. Certification is a mandatory, and the labeling authorities "CE" provides the possibility of implementing products in the EU countries. The company obtained such a certificate is obliged to regularly report to the standard, for which the production requires a laboratory and highly qualified specialists. Therefore, the availability of a certificate of an independent international organization among the domestic enterprise is a reliable guarantee of the quality of products produced by it.
Konstantin Blinov, Director of the Representative Office of the C-Dok JSC in Moscow:
Large manufacturers of glued bars not only declare the release of high-quality products, but also confirm it with certificates of responsible logging. Such companies are associated with the implementation of protocols, and for product certification produces it in accordance with their obligations. The presence of a manufacturer of an international certificate guarantees high quality products. These documents include the Certificate of BM Trada to confirm conformity EN 14081: 2005 + A1: 2011 No. 1224-CPD-0258; Certificate of the University of Test Materials of the City of Stuttgart, Germany; FSC Certificate (NC-COC-014254 code, NC-CW-014254, FSC-C003513 license code). Certification of the production chain from wood workpiece to the production of finished products in accordance with the Forest SteewardShip Council ® (Forest Board of Trustees); Environmental Declaration of Products (EPD). Sokol has all of the listed international documents, as well as domestic certificates of compliance with GOST R No. ROS RU.Ai.09.N.00824 and GOST R No. ROSS RU.Ai.09.n.00823.
