The pool deck was laid on the southeastern quadrant of that base slab, with a pool and Jacuzzi in one corner. Almost five inches of additional layers including concrete, waterproofing and pavings ...

On June 22, a commercial pool contractor noted cracking concrete and severely corroded rebar under the pool as well as standing water in its equipment room, the Miami Herald has reported. 5 ...

A pool contractor toured Champlain Towers near Miami Beach 36 hours before the collapse and saw standing water, cracked concrete and corroded rebar in the garage.

Plans call for a uniform concrete slab cover — the distance between the rebar and the top or bottom of the slab — of three-quarters of an inch, half the required depth for outdoor elements.

Patio or pool deck. Here, pouring a concrete slab 4 inches in thickness is fine. While you may choose to reinforce it with rebar, wire mesh should be sufficient. Outdoor kitchen foundation.

Patio or pool deck. Here, pouring a concrete slab 4 inches in thickness is fine. While you may choose to reinforce it with rebar, wire mesh should be sufficient. Outdoor kitchen foundation.

The rebar in the Champlain Towers South slabs is a complex mesh, with crisscrossing sets of long, parallel bars set into a plane near the top of the slab and more reinforcement close to the bottom.

Patio or pool deck. Here, pouring a concrete slab 4 inches in thickness is fine. While you may choose to reinforce it with rebar, wire mesh should be sufficient.

Patio or pool deck. Here, pouring a concrete slab 4 inches in thickness is fine. While you may choose to reinforce it with rebar, wire mesh should be sufficient.

Also, the rebar was placed improperly into the cast concrete slabs of the pool deck, leaving those sections weaker than required.