TM 55-607/NAVSEA OP 3221 Rev 2
Figure 6-20. Direct nailing.
(2) When more than one nail or spike is used in a joint, the total allowable load in withdrawal (tension) or
lateral resistance is the sum of the allowable loads for the individual nail or spike, as shown in figure 6-21. The allowable
loads in tables C-3 and C4 for nails and spikes are the maximum for normal loading.