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DHR - SAFETY ALERT MEMO 96-08a
DATE: July 16, 1996
INCIDENT TYPE: Defective Jack Stands
LOCATION: District 2
TYPE OF WORK ACTIVITY: Equipment Repair
THE ACCIDENT: On May 13, 1996, a Heavy Equipment Mechanic in Shop 2 in Redding had brought a truck into the shop, jacked it up and supported it with a pair of jack stands. Both jack stands failed and the truck dropped to the floor. Fortunately, no one was near the truck when the jack stands failed and there were no injuries. These jack stands were made by CE Tool Co., Model CE-03304-06 and were six ton capacity each. The label on these jack stands state that they are not to be used to support both ends of a vehicle at the same time. This label also cautions users not to get beneath the vehicle with the wheels removed. These stands had a rated capacity of 24,000 lbs. per pair and they were supporting a truck weighing 17,000 lbs. when the failure occurred.
CONCLUSIONS: All proper procedures were followed when the jack stands were placed under the truck. It appears that one of the jack stands may have had a small crack in the column portion of the stand. When one stand failed, added stress was placed on the remaining jack stand and it failed also.
RECOMMENDATIONS: Inspect all jack stands for cracks or defects. All jack stands of the make and model listed above should be removed from service immediately. Only American National Standards Institute (ANSI) approved jack stands of adequate capacity and capable of supporting both ends of the vehicle should be purchased. ANSI approved jack stands must have the capacity, manufacturer identification and a warning on them. This information must be metal stamped or casting imprinted into the jack stand or be printed on a durable decal attached to the jack stand.
HEADQUARTERS OFFICE OF SAFETY AND HEALTH (916) 227-2640