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Side and End Grain Withdrawal Loads for Single Nails in Australian Timber Species
Australian and other timber engineering design codes do not permit withdrawal loads to be applied to nails driven into end grain of timber. To examine the basis for this restriction, a range of nails, including handdriven plain wire, deformed shank and polymer coated machine-driven nails, were tested. They were driven into the end and side grain of a limited number of Australian species and withdrawn after delay periods varying from two hours to ten months. The effect of initial moisture content was assessed by testing green and kiln dry specimens. The investigation indicated that for dry material, end grain withdrawal loads could be directly related to existing information derived from tests on nails withdrawn from side grain. For green timber, differing levels of variability of the withdrawal loads from end and side grain required the calculation of lower 5 percentile withdrawal loads when formulating the ratio. (Copyright (c) CSIRO Australia 1985.)
Side and End Grain Withdrawal Loads for Single Nails in Australian Timber Species
Australian and other timber engineering design codes do not permit withdrawal loads to be applied to nails driven into end grain of timber. To examine the basis for this restriction, a range of nails, including handdriven plain wire, deformed shank and polymer coated machine-driven nails, were tested. They were driven into the end and side grain of a limited number of Australian species and withdrawn after delay periods varying from two hours to ten months. The effect of initial moisture content was assessed by testing green and kiln dry specimens. The investigation indicated that for dry material, end grain withdrawal loads could be directly related to existing information derived from tests on nails withdrawn from side grain. For green timber, differing levels of variability of the withdrawal loads from end and side grain required the calculation of lower 5 percentile withdrawal loads when formulating the ratio. (Copyright (c) CSIRO Australia 1985.)
Side and End Grain Withdrawal Loads for Single Nails in Australian Timber Species
E. P. Lhuede (author)
1985
17 pages
Report
No indication
English
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