Liability with Conflict between Project Plans and Contract Language

I'm a subcontractor working on a large project and we have a contract stating that we are responsible for all hoisting/rigging/installation of the equipment we are contracted to provide; however, according to project plans there is no feasible means of delivery for the equipment requested to the desired location in the timeline desired by the GC. This was overlooked by the architect on record and their contracted design consultant. Would we be required to point out those issues? or, more generally, where does the fault/liability lie if the issue is overlooked and the discovery is made at time of delivery (delivery into final room in GCs desired time frame would require breaking of concrete slab, removing PT lines, breaking of load bearing wall, renting of crane to drop equipment into room off a ramp, and then repair work).