3.6.4.9 Crush test:
1. Place product on a smooth level surface.
2. With the product sitting upright, place a ¾ inch think flat board (approximately 4 x 4 inches) on the product. The product center should be centered under the board.
3. Apply a load of 20 lbs. to the board for 30 seconds.
Evaluation: All wheels must spin freely, product must meet after abuse rolling distance and breakage or deformation of non-functional parts is acceptable