Quote:
Originally Posted by Rocket252
So why are they not using steel girders instead of concrete? Seems faster and would be cheaper.
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steel might be faster in terms of erecting the structure but the curtainwall crews can't usually keep up so by the time the building is closed in the schedules are usually pretty close.
steel has a much harder time incorporating cantilevers than concrete so those balconies might not work as shown.
concrete usually provides better sound isolation and less "bounce" to the structure which probably translates into better marketability and higher pricing.
cost is usually pretty close when you start to factor in the added costs of fire protection for the steel and higher costs for all of the vertical elements from curtainwall to elevators and piping resulting from the added floor to floor height needed to make up for the additional depth of steel construction vs concrete.