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# 16d Common Nail Lateral Design Value

• To: seaint(--nospam--at)seaint.org
• Subject: 16d Common Nail Lateral Design Value
• From: Peter Maregan <pmaregan(--nospam--at)yahoo.com>
• Date: Thu, 13 Aug 2009 14:17:17 -0700 (PDT)

In a wood shearwall, the bottom plate is nailed to the rim joist or board below through floor sheathing.

Based on IBC 2006/NDS 2005 I'm getting the following allowable value, which is substantially higher than what we had used in prior code cycles.

1 ½” thick (2x Plate) Douglas Fir-Larch            G = 0.5

16d Common Wire Nails                                  L = 3 ½”, D = 0.162”

Maximum Floor Sheathing Thickness                t = ¾”

Load Duration Factor                                       CD = 1.6          (Wind/Seismic)

Reference Lateral Design Value                        Z = 141 lb        (NDS-2005, Table 11N)

Based on full 10D or 1.62” Penetration

Minimum Required Penetration                         pmin = 6D = 0.972”

Actual Penetration                                            p = 3.5”-1.5”-0.75” = 1.25” > pmin      OK

Adjust for Reduced Penetration                        1.25/1.62 = 0.7716

Allowable Shear per 16d Nail                           Z’ = 0.7716 x 1.6 x 141 = 174 lb

Does this look reasonable or did I miss something?