b. If the boxes are less than 42 inches long, only two 4 inches by 4 inches dunnage are required and
aligned with cleats of boxes.
c. Boxes of 42 inches or longer will require an additional piece positioned on center of box.
d. The top layer of boxes must be inverted.
15. A unit stack is a group of boxes arranged in rows and layers and placed on short dunnage to permit
handling of the group by a single lift with a forklift truck.
a. The quantity of boxes in a unit stack will depend upon the width and height dimensions of the
boxes. However, the total weight of the unit stack must not exceed the weight capacity of the forklift
b. The number of rows in a unit stack will be determined by the length of the forklift tines and the
widths of the boxes.
c. To facilitate safe handling, not more than 1/3 of the width of the box should extend beyond the
ends of the fork tines of the forklift truck; the number of layers should generally not exceed a total of 54
inches in height.
d. When a unit stack consists of narrow boxes, or it is otherwise deemed necessary, a length of 5/8
or 3/4 inch steel strapping may be used to encircle the unit stack to provide stability in handling and
e. An alternative method of providing stability to a unit stack is to position a length of strap
horizontally around the top layer of boxes.