I forget... one of the economic factors fueling development of cast
stone in NYC is the historical scarcity of natural brownstone as well as
NYC available stone carvers.
The cost to carve the cornice on the B&N from natural stone was
something like 4 times the cost to replicate in GFRC. That was not even
including the likely increased cost in installation due to need for more
beefed up scaffolding and hoisting equipment, let alone a more hefty
engineered anchoring system.

][<en

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