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NDS Commentary <br /> For toe nails subject to lateral loads, the depth of member ends and edges than larger nails as they are <br /> penetration of the nail in the member holding the point less likely to cause splitting. Where splitting can not <br /> may be taken as the vertically projected length of nail be avoided, preboring of nail holes should be used (see <br /> in the member as shown in Figure C12.3-1, or (see 12.1.3.1). <br /> 12.1.3.2) In lieu of specific code requirements for end and <br /> pL = Lncos3O° - 4/3 (C12.3-3) edge distance for nails, Table C12.4-1 may be used to <br /> establish nailing patterns. Designers should note that <br /> where: specie type, moisture content and <br /> grain orientation will <br /> pc = vertical projection of penetration of nail in affect spacing (pitch) between fasteners in a row. <br /> main member, in. Table C12.4-1 Nail Minimum Spacing Tables <br /> Ln = length of nail, in. Wood Side Members <br /> For purposes of establishing the single shear lateral Not <br /> design value applicable to a toe nailed joint, the side Prebored Prebored <br /> member thickness shall be taken as the length of the Edge distance 2.5d 2.5d <br /> nail in the side member (see Figure C12.3-1) or End distance <br /> -tension load parallel to grain . 15d 10d <br /> is = Ln/3 (C12.3-4) -compression load parallel to grain 10d Sd <br /> Spacing(pitch)between fasteners in a row <br /> where: -parallel to grain 15d 10d <br /> t3 = effective side member thickness when toe- -pa (gage) <br /> betweto en <br /> lOd 5d <br /> Spacing(gage)between rows of fasteners <br /> nailing is used, in. -in-line 5d 3d <br /> 2.5d <br /> Equation C12.3-4 only applies to nails driven at an -staggered Side 2Members.5d <br /> Stee <br /> angle of approximately 30° to the face of the member Not Not <br /> being attached and one-third the nail length from the Prebored Prebored <br /> end of that member. The effective side member Edge distance 2.5d 2.5d <br /> thickness for nails driven at any angle to the face of End distance <br /> the member being attached should not exceed the -tension load parallel to grain 10d Sd <br /> actual thickness of that member. -compression load parallel to grain 5d 3d <br /> Spacing(pitch)between fasteners in a row . <br /> Pc -parallel to grain lOd 5d <br /> -perpendicular to grain 5d 2.5d <br /> Spacing(gage)between rows of fasteners <br /> -in line 3d 2.5d <br /> -staggered 2.5d 2.Sd <br /> t=�Ln/3 12.4.2-Multiple Nails or Spikes <br /> P , Since the 1944 edition, the total design value for a <br /> w connection made with more than one nail or spike has <br /> XI. been determined as the sum of the allowable design <br /> values for the individual fasteners. In the 1992 edition, <br /> Figure C12.3-1 Bfleetivepenetration and side member thickness or <br /> summation provision is limited to only those nails <br /> or spikes in the joint which are of the same size and <br /> for toe nails subject to lateral loads. <br /> type (see Commentary for 7.2.2 and 7.1.1.1). <br /> 12.4-PLACEMENT OF NAILS AND SPIKES <br /> 12.4.1-Edge Distance, End Distance, Spacing <br /> Absence of splitting has been the performance <br /> criterion for placement of nails and spikes since the <br /> 1944 edition. Smaller nails can be placed closer to _.....Th <br /> C7P,C)/' <br /> Nails and Spikes 149 <br />