Sg. Winistorfer et La. Soltis, LATERAL AND WITHDRAWAL STRENGTH OF NAIL CONNECTIONS FOR MANUFACTURED HOUSING, Journal of structural engineering, 120(12), 1994, pp. 3577-3594
Citations number
13
Categorie Soggetti
Engineering, Civil","Construcion & Building Technology
Current methods used in the design of nailed connections do not direct
ly relate to the types of joints found in manufactured housing. These
methods do not account for the construction practices used today, such
as power nailing equipment, the use of nails with coated shanks, or t
he fabrication of joints with filler materials separating main wood me
mbers. A total of 640 joints were tested to investigate the effects of
these five variables on lateral and withdrawal strength of nails: (1)
Two wood species groups; (2) low- and high-humidity environments; (3)
hand- and power-driven nails; (4) uncoated and coated nail shanks; an
d (5) presence or absence of filler material in a joint. Tests verifie
d that lateral strength increases with increasing wood density and tha
t as environments become less humid and the moisture content of wood d
ecreases, lateral strength and stiffness of nailed connections increas
e. In the dry environment, the withdrawal strength of coated nails was
almost 90% higher than that of uncoated nails in joints with an orien
ted strandboard (OSB) filler and almost 40% higher when no filler was
used. In high-humidity conditions, no differences were observed betwee
n joints with coated nails and those with uncoated nails. In most othe
r cases, the OSB filler reduced withdrawal strength by an overall aver
age of 25%. This reduction is proportional to the amount of penetratio
n into the solid wood member; therefore, nail length should be increas
ed when an OSB filler is present.