Standard Interpretations - Table of Contents|
| Standard Number:||1926.550(a)(19) ; 1926.704(e); 1926.753; 1926.753(e)|
|OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov.|
All employees shall be kept clear of loads about to be lifted and of suspended loads.During the multiple lift (or "christmas treeing") procedure, the hoisted members need to be attached to the rigging assembly beginning with the topmost attachment. That means that employees have to be under the already attached members while continuing the attachment process. Also, the hoisted members are detached from the assembly beginning with the bottom member, so employees are under the remaining members during the unhooking phase of the operation (see the description of this process in steel erection in Volume 66 of the Federal Register at page 5212, January 18, 2001). Consequently, the application of this procedure to pre-cast concrete erection during the initial rigging of the members onto the hoist line would violate 1926.550(a)(19).
No employee shall be permitted under precast concrete members being lifted or tilted into position except those employees required for the erection of those members.Since the pre-cast members can be lifted individually, rather than as part of a multiple lift rigging procedure, there is no need for employees engaged in rigging the members onto the hoist line to be under a load. Similarly, when placing a member individually, once the member nears its placement point, employees engaged in the erection process are typically no longer under the load. However, if a multiple lift rigging procedure is used, they would remain under the other members on the load line at that point. Therefore, using a multiple lift rigging procedure would violate 1926.704(e).
|Standard Interpretations - Table of Contents|
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