as published by FMCSA
Driver’s Handbook on Cargo Securement – Chapter 4: Dressed Lumber and Similar B
Positioning and Securing Bundles (Section 3.2.2)
(previous section not included)
Requirements for securing bundles in two or more tiers
There are four options for securing bundles of dressed lumber that are transported in two or more tiers. Choose one of the four.
- Option #1:
- To block side-to-side movement, block the bundles with stakes on the sides of the vehicle. Secure the bundles by tiedowns laid out over the top tier, as outlined in Section 2.
- Option #2:
- To block side-to-side movement, use blocking or high friction devices between the tiers. Secure the bundles by tiedowns laid out over the top tier, as outlined in Section 2.
High Friction Devices
- Friction mat
- Piece of wood with friction surface
- Cleated mat
- Other specialized equipment
- Option #3:
- Place bundles directly on top of other bundles or on spacers.
- Secure the stack of bundles with tiedowns:
- Tiedowns over the second tier of bundles or at 1.85 m (6 ft) above the trailer deck (whichever is greater).
- Tiedowns for other multiple tiers not over 1.85 m (6 ft) above the trailer.
- Tiedowns over the top tier of bundles with a minimum of 2 tiedowns over each top bundle longer than 1.52 m (5 ft).
- The length of spacers must provide support to all pieces in the bottom row of the bundle.
- The width of each spacer must be equal or greater than the height.
- Spacers must provide good interlayer friction.
- If spacers are comprised of layers of material, the layers must be unitized or fastened together to ensure that the spacer performs as a single piece of material.
- Option #4:
- Secure the bundles by tiedowns over each tier of bundles in accordance with the general cargo securement requirements (Section 2).
- Use at least 2 tiedowns over each bundle on the top tier that is longer than 1.52 m (5 ft).