You could use an abandoned duct chase, elevator shaft or depending on how the interior stairs are designed I have placed chutes down the middle.
Do the new mechanical or structural drawings show any new duct chases or shafts?
You may just have to arrainge a coordination meeting with the GC and all other subs and present your case. Let them know demo subs are just as critical in a project and deserve the proper space to complete our work safely and profitably. Is it possible to load out off hours when the staging area is not active or the curtain wall sub is gone?
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