RESUMO-A Madeira Laminada Colada-MLC é um produto inovador de alto valor agregado, porém ainda não participa de programas de qualidade a exemplo do Programa Nacional de Qualidade da Madeira-PNQM e Programa Brasileiro da Qualidade e Produtividade do Habitat-PBQP-H. O presente trabalho visou oportunizar maior visibilidade ao produto em MLC, aferir maior segurança na sua concepção e utilização, estimular a participação das empresas produtoras de MLC em programas nacionais de qualidade. Para tanto, foram realizadas pesquisas sobre os produtos ofertados pelas empresas brasileiras de MLC, visitas às indústrias, consultas às normas técnicas e resoluções do Instituto Nacional de Metrologia, Qualidade e Tecnologia-INMETRO. Com base nesse levantamento foi elaborada esta proposta de um programa de qualidade voltado para produtos em MLC de uso estrutural e não estrutural. A implantação desta proposta de programa de qualidade facilitará a obtenção de subsídios às empresas e estimulará o consumo de MLC no mercado da construção civil. Palavras-chave: mercado; padronização; madeira certificada; madeira laminada colada; certificação. ABSTRACT-The GLT is an innovative product with high added value, but it still does not participate in quality programs such as the National Quality Wood-PNQM, and the Brazilian Program of Quality and Productivity Habitat-PBQP-H). This work aimed to create opportunities for greater visibility to the MLC product, assess their safer design and use, encourage the participation of companies producing MLC in national quality programs. Thus, we conducted a research on the products offered by Brazilian companies MLC, visits to industries, consultations to technical standards and resolutions of the National Institute of Metrology, Quality and Technology-INMETRO. Based on this survey we designed a program focused on MLC quality products structural and non-structural use. The implementation of the proposed quality program will facilitate obtaining grants to businesses and stimulate the consumption of MLC in the construction market.
Glued Laminated Timber (GLULAM) is manufactured by joining wood lamellae glued in parallel to each other. GLULAM with larger longitudinal dimensions can be obtained by gluing the tops of two wood lamellae. The gluing of the tops can be done using wedge-shaped scarf joints. However, the joints produce a discontinuity in the wood, being areas considered as susceptible to rupture. In this way, the objectives were to evaluate four slopes (1:6; 1:8; 1:10 and 1:12) in scarf joints of Schizolobium parahyba var. amazonicum timber for use with structural purposes; and glued laminated timber beams – GLULAM manufactured with the scarf joint with the best performance by the modulus of elasticity – MOE (theoretical and analytical MOE values). Each laminated timber used to produce the test specimens was classified by visual inspection that aimed at the absence of defects, such as knots. The test specimens were adapted to the four-point static bending test and to the tensile strength test in parallel to the grain direction, in accordance to the NBR 7190 (1997). The slope of 1:12 showed the best results, while the slope of 1:6 presented the lowest results when compared with the control. The beams of 5 x 9.5 x 220 cm, composed of joints with slopes of 1:12, showed MOE values statistically equal to those of beams without joints. The scarf joint proved to be an alternative for use in glulam beams of paricá, as it presents stiffness and strength comparable with those of beams without a joint.
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