Recognize and Respond to Changed Conditions - Roll-up Door Falls During Maintenance Work
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Type:  Lessons Learned

Publisher:  Lawrence Livermore National Laboratory, Livermore, CA

Published As:  Public

Date: 

Topics:  Maintenance, Construction/Project Management, Work Management/Planning

After replacing a roll-up doors motor, the subcontractor began setting the limits for the fully-open and fully-closed positions. Because this motors original fully-open limit was set too high, the bottom rail of the door got jammed on the stops and the door became stuck at a height greater than ten feet above the floor, introducing a changed condition. The moment the subcontractors crew cleared this condition, the door fell to the floor in an uncontrolled manner.

Fortunately, subcontractor employees identified the remote possibility of the door falling as part of the original scope. They followed their safety protocols and cordoned off the work area to prevent personnel not involved in this work from entering. Observance of the work area markings kept LLNL personnel away from the work location. Subcontractor personnel avoided potential injury by staying out from under the door while correcting the jam.

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