2304.9.3.2.1 Two-inch mechanically laminated decking.
BC § 2304.9.3.2.1
For mechanically laminated decking constructed with laminations of 2-inch (51 mm) nominal thickness, nailing and fastening to supports in accordance with Table 2304.9.3.2.1 shall be permitted. Other connections are permitted to be used provided they are reviewed and approved by the registered design professional of record, but shall be spaced at no more than 16 inches (406 mm) on center. Table 2304.9.3.2.1Fastening Schedule for Mechanically Laminated Decking Using Laminations of 2-Inch Nominal Thickness Minimum Nail Size(Length X Diameter)Maximum Spacing Between Face Nails a, b, c (Inches)Number of ToenailsInto Supports dDecking Supports≤ 48 inches on centerDecking Supports> 48 inches on centerMinimum Nail Size(Length X Diameter)Maximum Spacing Between Face Nails a, b, c (Inches)Number of ToenailsInto Supports dDecking Supports≤ 48 inches on centerDecking Supports> 48 inches on center4" x 0.192"301814" x 0.162"241424" x 0.148"221323 1/2" x 0.162"201223 1/2" x 0.148"191123 1/2" x 0.135"171023" x 0.148"11723" x 0.128"9522 3/4" x 0.148"10622 3/4" x 0.131"9632 3/4" x 0.120"853 For SI: 1 inch = 25.4 mm a. Nails shall be driven perpendicular to the lamination face, alternating between top and bottom edges. b. Where nails penetrate through two laminations and into the third, they shall be staggered one-third of the spacing in adjacent laminations. Otherwise, nails shall be staggered one-half of the spacing in adjacent laminations. c. Two side nails shall be installed at each end of butt-jointed pieces. d. Where supports are 48 inches (1219 mm) on center or less, alternate laminations shall be toenailed to alternate supports; where supports are spaced more than 48 inches (1219 mm) on center, alternate laminations shall be toenailed to every support.
