Each wood member contains a combination of characteristics which affects the performance of the container or pallet in which it is used. The requirements for classes, herein specified, have been established as these characteristics are related to the functional application of members in container and pallet construction and to the service that the container or pallet may be called upon to perform.

Any other specified requirements or limitations peculiar to a particular container or pallet construction or use, such as prohibiting knotholes or loose knots to provide siftproofness, limitation to certain wood groups or species, or the selection of applicable classes for specific members of or types of containers or pallet shall be the responsibility of the standard for that container or pallet.

1.1 This practice covers the quality requirements for three classes of hardwood and soft-wood members, excluding man-made or fabricated wood composites, used in the construction of boxes, crates, pallets, and blocking and bracing.

1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.

1.3 This practice does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of the regulatory limitations prior to use.