TM 55-607/NAVSEA OP 3221 Rev 2
Figure 6-21. Total holding power of multiple nails.
(3) The allowable withdrawal (tension) load upon nails that are driven into the side grain of wood members
depends on the specific gravity of the species, as provided in table B-3. Securing structures should be designed so that
nails are not loaded in withdrawal. Where these conditions are unavoidable, the allowable withdrawal loads per inch of
penetration of a nail driven into the side grain (perpendicular to the fiber) of seasoned wood are given in table C-3.
(4) The allowable loads in lateral (sideward) resistance, when a nail is driven into the side grain of seasoned
wood with load applied in any lateral direction, are given in table C-4. Loadings apply only where the depth of
penetration into the larger member holding the point is not less than 10 diameters for group I species; 11 diameters for
group II species; 13 diameters for group III species; and 14 diameters for group IV species (table B-3 shows groupings).
6-21
