deals with a conventional van trailer with a 30-unit load utilizing the flat-dunnage, decreased-height method. For
this lesson, start with the back of the trailer and work forward.
Rear Blocking Assembly. Page 8, Key Number 6, of the drawing refers you to Special Note 5 on Page 9.
When you measure the space (void) between the rear of the load and the rear doors, you find that it is 9 1/2
inches. Therefore, you need to use Rear Blocking Assembly B shown on Page 25. Compare the drawing on
Page 25 to the assembly in the trailer. Check the assembly for the following:
Four load-bearing pieces that are 2 inches by 4 inches by 12 inches (two against each pallet).
Ten penny (10d) nails used throughout.
Close fit between the door and the rear of the pallets.
Spacer Piece. If a spacer piece is used, make sure it is nailed to the rear-most crib fill assembly. Check
Key Number 3 (Page 8) of the drawing to determine if you need a spacer.
Crib Fill Assembly. See Key Number 2 (Page 8). Seven crib fill assemblies are required-one between each
double pair of pallets. Check for the following:
Sizes of vertical and horizontal pieces correct per Crib Fill Charts A and B (Page 23 of the drawing).
A staggered nailing pattern used where possible (General Notes O and P on Page 2 of the drawing).
Stack Unitizing Strap. See Key Number 7, Page 8. These straps (or bands) should have been used to
make the rear-most double-stack units into a single unit. Check for the following:
That straps are 1 1/4 inches wide and that there are four of them (two per double stack).
That a strapping board is under each strap on each side of the double stack for a total of eight strapping
boards. Strapping boards provide a bearing surface for the straps.
That the ends of the straps have two seals per strap with two crimps per seal.
Tie Wire. See Key Number 9, Page 8. The tie wire brings the last two adjacent double stacks into a more
secure condition. Check for the following:
That the wire is looped around a vertical piece of the crib fill assembly and then twisted.
That each end of the wire is tied to the adjacent stack unitizing strap (top pallet only).
That the wire is secured to the crib fill with a partially driven ten-penny nail or a staple bent over the wire.
Continue checking spacer pieces and crib fill assemblies as far as possible. Should any of your checks show that
something has not been done, or done with inferior materials, it must be corrected before you can approve the