Masonry Magazine January 1971 Page. 36
Precast Panel Erection
(Continued from page 8)
you do not already own equipment which will handle the size and weight of the precast concrete panels called for on this particular project. Never try to cheat on rigging. Where possible, submit your rigging operation and/or plans for observation and/or approval of the structural engineer on the job, so that any equipment that you place on the project will not overload the structure.
PHASE III: Operation checkpoint.
At this point and time prior to receiving any material or starting any erection operations, check all phases which you have accomplished previously as well as re-checking all plans of the operation which have not yet been instituted.
Check all shop drawings, prior to submitting them to the general contractor for approval, for the proper size anchorage in relation to the size and weight of the precast concrete panel. This is most important because you are the one who is going to lift this panel, and if the anchor is not sufficient to carry the load under extreme stresses, it will be your operation in which the anchor will pull out and it will be your insurance company that will have to pay for all damage caused by a 12,000 lb. precast panel falling perhaps several or more stories. Therefore, this anchorage must meet your requirements, even if they are excessive in the eyes of the precast manufacturer and/or the structural engineer.
Review minutely the shop drawings in regard to the contract plans with the objective of locating any potentially dangerous conditions which might exist in the setting or aligning of the precast concrete panels as shown on the shop drawings.
Review shop drawings for quality and strength of anchoring devices so as to obtain the highest grade material available in today's market, such as the use of high-strength steel set screws in lieu of ordinary leveling bolts, and the like.
Thoroughly review all shop drawings in regard to the general design of the anchorage and its compatibility with the actual structure as shown on the concrete plans. If either shows that a conflict exists, then insist that those parties necessary to work out this conflict meet and work this out prior to the installation of panels.
At this point, be sure that your job foreman or supervisor has been selected and that he is well-briefed on the game plan for the installation of the precast concrete panels on this particular job.
Send your job foreman or supervisor to the precast concrete panel manufacturer's plant to look at the panels which he will be required to set, so that he can determine in his own mind that the game plan is either right or wrong. He then will have an opportunity to contribute to the pre-planning.
Also take the general contractor's superintendent to the manufacturer's plant when possible so that he can actually look at the panels to be erected and understand the nature and size of them. He then can have those areas in which the panels are to be received properly shored prior to the arrival of the first shipment. This will insure that there will be no failures in structure due to overloading from the delivery of materials.
Review once again your plan for the rigging and the type and size of equipment you feel that you need, as well as the type and size of equipment that your job foreman feels he needs after all parties concerned have looked at the actual panel size.
JUST YOUR CUP OF TEA
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