Withdrawal Strength of Ring-Shank Nails Embedded in Southern Pine Lumber

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

doi:10.13031/2013.21272

Cited by 13 publications

(10 citation statements)

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“…This constant load region represents nail strength resisted by the dynamic coefficient of friction as the nail backs out. The load-displacement curves for the annularly threaded and common nails are similar to the response reported by Skulteti et al (1997) and Stern (1950b) for ring-shank and common nails in Southern Pine. Of the two types of threaded nails, annular nails had greater strength values but lost strength after the first maximum, whereas helically threaded nails had lower initial strength but increased strength after an initial load drop.…”

Section: Withdrawal Performancesupporting

confidence: 84%

“…Table 3 lists the best-fit distribution and distribution parameters for each set of 50 nail types tested. Skulteti et al (1997) found that the Weibull and lognormal distributions fit withdrawal strength distributions of ring-shank nails in Southern Pine. …”

Section: Strength Distributionsmentioning

confidence: 94%

“…In both cases, there was a minimum 18% decrease in mean withdrawal strength of galvanized nails as compared to that of ungalvanized nails. Skulteti et al (1997) found that the average withdrawal strength of galvanized nails was 8% lower than that of matched common nails. …”

Section: Effects Of Manufacturing and Galvanizingmentioning

confidence: 94%

“…Past withdrawal testing used small replicate numbers and cannot be used to determine the underlying probabilistic distributions. Skulteti et al (1997) determined the withdrawal strength of annularly threaded nails in Southern Pine lumber for relatively large sample sizes (n = 60). They investigated the effects of nail diameter and galvanizing on the immediate withdrawal strength of three sizes of annularly threaded nails and compared strength values to that of common nails.…”

Section: Introductionmentioning

confidence: 99%

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Withdrawal Strength of Threaded Nails

2001

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Threaded nails are used in wood construction because of their superior performance, but relatively few tests have been conducted on nails larger than 12d (3.76 mm diameter). Experience has suggested that threaded nail withdrawal design values are too conservative. The Forest Products Laboratory and Washington State University have been cooperatively characterizing the strength of threaded nails over a range of wood species and nail types. This paper focuses on the immediate withdrawal strength of annularly threaded nails in Douglas Fir and Spruce-Pine-Fir, helically threaded nails in Southern Pine, and smooth nails in Southern Pine and Spruce-Pine-Fir lumber. Average withdrawal strength of threaded nails was greater than that of smooth shank nails of the same diameter. In comparison of experimental withdrawal strength to existing design procedures for assigning allowable withdrawal strength design values, annular shank nails showed the greatest difference. Withdrawal strengths of nails from five different manufacturers were not significantly different. Comparisons of the effect of galvanizing on withdrawal strength were inconclusive.

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Section: Withdrawal Performancesupporting

confidence: 84%

Section: Strength Distributionsmentioning

confidence: 94%

Section: Effects Of Manufacturing and Galvanizingmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Withdrawal Strength of Threaded Nails

2001

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“…In 1941, K. W. Johansen firstly came up with the yielding theory by taking a large number of experiments and theory derivation that the capacity of nail connection is affected by nail ultimate flexural strength, shearing resistance strength and wood loading capacity at the nail joint points [7]. While different type of nails with various surface roughness, diameter and length contribute different static friction with wood nailing grooves [8][9][10]. Steel nails made of different materials contribute to various flexural and shearing strength [11].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Nail Joint Shearing Properties of Light Frame Wooden Shear Walls

Han¹,

Dong²,

Song³

2018

EAS

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Shear walls in light wooden frame structure are major components to resist lateral loading. Nail joint is one of the most important factors that affects shear walls shearing properties. In this paper, different nail types, sheathing panel types and thickness and stud grain direction were set to study the influence factors of nail joint properties. Wooden shear walls made of studs with different cross size were monotonic and cyclic loaded to investigate the influence on lateral resistance properties. The failure of nail joint can be classified into three modes that nails bent and withdrawn from the studs, nail heads pulled off from the panels and nails split off along the stud grain. It is concluded from the nail joint loading and displacement results that twist nails get the largest bearing capacity compared with strip nails and coil nails due to the nail diameter and larger friction. Nail joints on China-produced structural plywood obtain the largest shearing resistance values among three different kinds of panels. And thicker panels can bear larger shearing loadings. The largest displacement of the nail joints load parallel to stud grain were larger than those perpendicular to stud grain. It can be derived from the shear wall lateral loading experiments that the lateral resistance of the shear wall could not be strengthened with the larger stud size, while the stiffness and energy capacity could be improved. In this way, the seismic resistance properties of shear walls can be enhanced by optimizing nail joint materials and studs parameters.

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