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WITHDRAWAL STRENGTH OF RING-SHANK NAILS EMBEDDED IN SOUTHERN PINE LUMBER

1997; Volume: 40; Issue: 2 Linguagem: Inglês

10.13031/2013.21272

2151-0059

Matthew John Skulteti, D. A. Bender, Steve G. Winistorfer, David G. Pollock,

Materials Engineering and Processing

Ring-shank nails are used extensively in post-frame construction due to their superior performance, yetsurprisingly little testing has been done on nail sizes above 12d. Experience in the post-frame industry suggests thatpublished allowable design values for ring-shank nails may be overly conservative and need revision. The goal of theresearch reported herein was to characterize the withdrawal strength of ring-shank nails embedded in Southern Pinelumber. Three sizes of galvanized and ungalvanized (bright) ring-shank nails from two manufacturers were studied. Ringshanknails had approximately twice the withdrawal resistance of smooth-shank nails of the same diameter. Galvanizingslightly reduced withdrawal strength (approximately 8%) due to partial filling of the threads. Nail head pull-through wasstudied as a possible failure mode. Even allowing for galvanizing and head pull-through, strong evidence is presented forincreasing withdrawal design values for ring-shank nails.