. Wooden box and crate construction . ox, provided strains due to the contents and thehazards encountered are not severe enough to spring theboards and produce nail splitting at these edges. The sizeof nails should be as shown by the nailing schedule on page102. Six penny nails and smaller should be spaced approxi-mately six inches apart, and this distance increased one inchfor each penny over six. Nails for Clinching—The character of the surface of theshank is relatively unimportant in nails to be clinched,the head and the clinched end being the important nails are to be
. Wooden box and crate construction . ox, provided strains due to the contents and thehazards encountered are not severe enough to spring theboards and produce nail splitting at these edges. The sizeof nails should be as shown by the nailing schedule on page102. Six penny nails and smaller should be spaced approxi-mately six inches apart, and this distance increased one inchfor each penny over six. Nails for Clinching—The character of the surface of theshank is relatively unimportant in nails to be clinched,the head and the clinched end being the important nails are to be preferred because they lessen the dan-ger of splitting the wood and clinch more easily. The use ofcleating nails made with a side point is increasing. Thelong slender point turns back into the wood when driven andg^ives more uniform results than right-angled clinching. ^See discussion of strapping, page 60. BOX DESIGN 57 Large Nail Heads^—Tests have demonstrated that largenail heads have considerable advantage over small ones bc-. FiG. 19—Injury to wood fiber resulting from overdriving nails. cause of the additional resistance offered to being pulled di-rectly through the wood. Large heads also prevent the shanksof the nails from shearing out as easily at the ends of the Table 11. Effect of Size of Heads on Strength of a Nailed Joint •=• Shear Size of Diameter Load Heads Nails Load Heads Nails Material nail of heads per nail off broken per nail off broken inches pounds % total % total pounds To total % total 6d .36 312 0 0 186 0 0 6d .26 257 0 0 155 0 0 6d .24 250 0 0 154 0 0 5/16-inch red gum 5d .28 213 100 0 158 33 16 rotary cut 5d .22 196 22 0 152 8 8 5d .19 212 0 0 164 0 0 4d .28 239 83 0 173 67 16 4d .22 248 100 0 168 33 0 4d .19 222 0 0 163 0 0 6d .36 220 11 0 164 0 0 6d .26 194 0 0 139 0 0 6d .24 181 0 0 139 0 0 3/8-inch sawed 5d .28 178 33 0 138 33 17 white pine 5d .22 149 0 0 142 8 8 5d .19 122 0 0 134 0 0 4d .28 154 22 0 172 33 67 4d .22 146 0 0 161 11 22 4d
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Keywords: ., bookauthorforestpr, bookcentury1900, bookdecade1920, bookyear1921
