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Interaction of surface roughness of sawn timber and dimension timber

100%

Surikova J., Surikova A.

Annals of Warsaw Agricultural University. Forestry and Wood Technology

2004

tom 55

The size of allowances for machining of sawn timber and dimension timber is determining by quality of sawn timber surface, its unevenness and roughness. The wooden mass contained in allowances constitutes a waste and is the basic factor in determining dimension timber yield from sawn timber.

Pre - loading screw joint in wood constructions

80%

Tothova M., Surikova J., Surikova A.

Annals of Warsaw Agricultural University. Forestry and Wood Technology

2005

tom 57

Screw joints for wood products and constructions has not individual standard for dimensioning. Experimental observation of strength of preloaded screw joints of wood parts show, that screws to wood are more suitable for transfer of higher forces at drawing than nails, but their assembling must be realised according to construction standards, they must not be hammered and they must be screwed to pre-drilled holes (besides of self-cut wood screws). The assembling must be realised by controlled tightening moment for ensuring of dimensioned pre-loading. At joints with long-term loading there is necessary to renew the pre-loading by occasional screwing of the joint.

Ograniczanie wyników

2 Annals of Warsaw Agricultural University. Forestry and Wood Technology

2 Surikova A.

2 Surikova J.

1 Tothova M.

1 2005

1 2004

Wyniki wyszukiwania

Interaction of surface roughness of sawn timber and dimension timber

Pre - loading screw joint in wood constructions