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Extração de pregos em madeiras da Amazônia

Twenty wood species, originally from the Presidente Figueiredo county - Amazon State-Balblna Hydroelectric power station, were submited to nail extraction testes. From these tests it was possible to evaluate the influence of density upon the resistance to nail extraction and the relationship of the resistance between two nailed faces of wood.

It was not possible to introduce nails into same of the tested species. Therefore, studies were carried out do determine the factor which influence the facility with which nails can be hammered into the wood of these species, as well as the diameter of the drilled hole necessary for the introduction of the nail in the sample, in order to give the same resistance to nail extraction as in those ones which have not been drilled.


Instituto Nacional de Pesquisas da Amazônia Av. André Araujo, 2936 Aleixo, 69060-001 Manaus AM Brasil, Tel.: +55 92 3643-3030, Fax: +55 92 643-3223 - Manaus - AM - Brazil
E-mail: acta@inpa.gov.br