S.C. Code Regs. 38-393.118. What are the rules for securing dressed lumber or similar building products?

(a) Applicability. The rules apply to the transportation of bundles of dressed lumber, packaged lumber, building products such as plywood, gypsum board or other materials of similar shape. Lumber or building products which are not bundled or packaged must be treated as loose items and transported in accordance with Regulation 38-393.100 through 38-393.114 of this subpart. For the purpose of section 118, "bundle" refers to packages of lumber, building materials or similar products which are unitized for securement as a single article of cargo. (b) Positioning of bundles. Bundles must be placed side by side in direct contact with each other, or a means must be provided to prevent bundles from shifting towards each other. (c) Securement of bundles transported using no more than one tier. Bundles carried on one tier must be secured in accordance with the general provisions of Regulation 38-393.100 through 38-393.114. (d) Securement of bundles transported using more than one tier. Bundles carried in more than one tier must be either: (1) Blocked against lateral movement by stakes on the sides of the vehicle and secured by tiedowns laid out over the top tier, as outlined in the general provisions of Regulation 38-393.100 through 38-393.114; or (2) Restrained from lateral movement by blocking or high friction devices between tiers and secured by tiedowns laid out over the top tier, as outlined in the general provisions of Regulation 38-393.100 through 38-393.114; or (3) Placed directly on top of other bundles or on spacers and secured in accordance with the following: (i) The length of spacers between bundles must provide support to all pieces in the bottom row of the bundle. (ii) The width of individual spacers must be equal to or greater than the height. (iii) If spacers are comprised of layers of material, the layers must be unitized or fastened together in a manner which ensures that the spacer performs as a single piece of material. (iv) The arrangement of the tiedowns for the bundles must be: (A) Secured by tiedowns over the top tier of bundles, in accordance with the general provisions of Regulation 38-393.100 through 38-393.114 with a minimum of two tiedowns for bundles longer than 1.52 meters (5 ft); and (B) Secured by tiedowns in accordance with the general provisions of Regulation 38-393.100 through 38-393.114 over the second tier or over a middle tier of a maximum height of 1.85 meters (6 ft) above the trailer deck, whichever is greater, for each stack of bundles composed of more than two tiers; or (4) Secured by tiedowns over each tier of bundles, in accordance with Regulation 38-393.100 through 38-393.114 using a minimum of two tiedowns over each of the top bundles longer than 1.52 meters (5 ft), in all circumstances.