The concrete floors that gave way on Oct. 12 atop the Hard Rock Hotel as it rose above Canal Street were poured into a different kind and size of metal decking than what the city’s permitting ...

The concrete floors that gave way on Oct. 12 atop the Hard Rock Hotel as it rose above Canal Street were poured into a different kind and size of metal decking than what the city’s permitting ...

Most concrete piers used around the average home for a deck or other structure ... pour the wide bottom in one concrete pour, carefully place reinforcing steel in the base and wait a day.

Devote extra attention at construction joints to ensure the joint is at finish floor elevation after deck is loaded. SOMD steel structure will take time to deflect with the concrete loads.

That’s why concrete piers poured in waxed cardboard tubes and smooth wooden installing deck posts work well for below-grade support. Helical piers are becoming common in new construction of ...