Pool or Spa in Hi rise building

[sandsnow]

I'm having trouble with the deck rebar bonding in this scenario. The pool is on the roof and the spa is on one of the lower decks. There is a pocket formed in the concrete deck and the pool and spa drop in.

The concrete deck has rebar. Then a layer of waterproofing (like roll roofing). The deck finishes with pavers set on two inch high plastic risers.

I asked for a bond wire to the rebar in the deck when the building was going up; which they installed. Now one of them has been lost.

Before I push for them to expose the rebar and make the connection again, I wanted some opinions if people think this is required. The Code addresses deck steel, but this issue with the pavers does not seem to be addressed.

 

[Dennis Alwon]

In the 2005 art 680.26 (C) last sentence before (C)(1).

In the 2008

art 680 (B)(2) Perimeter Surfaces. The perimeter surface shall extend for 1 m (3 ft) horizontally beyond the inside walls of the pool and shall include unpaved surfaces as well as poured concrete and other types of paving. Bonding to perimeter surfaces shall be provided as specified in 680.26(B)(2)(a) or (2)(b) and shall be attached to the pool reinforcing steel or copper conductor grid at a minimum of four (4) points uniformly spaced around the perimeter of the pool. For nonconductive pool shells, bonding at four points shall not be required.
(a) Structural Reinforcing Steel. Structural reinforcing steel shall be bonded in accordance with 680.26(B)(1)(a).
(b) Alternate Means. Where structural reinforcing steel is not available or is encapsulated in a nonconductive compound, a copper conductor(s) shall be utilized where the following requirements are met:
(1) At least one minimum 8 AWG bare solid copper conductor shall be provided.
(2) The conductors shall follow the contour of the perimeter surface.
(3) Only listed splices shall be permitted.
(4) The required conductor shall be 450 to 600 mm (18 to 24 in.) from the inside walls of the pool.
(5) The required conductor shall be secured within or under the perimeter surface 100 mm to 150 mm (4 in. to 6 in.) below the subgrade.

 

[iwire]

Here if it's new construction and there is reinforcing steel....

Where structural reinforcing steel is not available

....it is available.

At least that is how concrete encased electrodes for services are handled.

 

[Pierre C Belarge]

I'm having trouble with the deck rebar bonding in this scenario. The pool is on the roof and the spa is on one of the lower decks. There is a pocket formed in the concrete deck and the pool and spa drop in.

The concrete deck has rebar. Then a layer of waterproofing (like roll roofing). The deck finishes with pavers set on two inch high plastic risers.

I asked for a bond wire to the rebar in the deck when the building was going up; which they installed. Now one of them has been lost.

Before I push for them to expose the rebar and make the connection again, I wanted some opinions if people think this is required. The Code addresses deck steel, but this issue with the pavers does not seem to be addressed.

Without actually being there to see the actual setup, it is somewhat difficult to give an absolute answer.

The pool and spa are seated onto the concrete decking. Then you have two layers of nonconducting items with pavers on top of the nonconducting layers.

The concrete the pools are seated on should/maybe have some type of bonding...the concrete is conductive.
The pavers seem to be electrically isolated due to the construction method. Interesting...

 

[sandsnow]

I'll post a diagram tonight

Thanks for the replies

 

[sandsnow]

Here's drawing of what's going on

 

[sandsnow]

Dennis
Your reply triggered something. The hi rise started under the old code (2002) but the pool was applied for after the first of the year, so that puts it undeer the new code (2005). That pretty much clinches it for the bonding of the steel in the deck under the pavers.

Thanks

 

[don_resqcapt19]

I don't see how this works, the intent is to bond the pavers and there is no exception for this type of installation. I don't see how bonding the rebar in the conduit below the payers bonds the pavers. However, in this case I see no real advantage to having the pavers bonded.
This is the same with the 2008 code that actually requires that the wooden deck around an above grade pool be bonded.
This code section still needs a lot of work!

 

[sandsnow]

This code section still needs a lot of work!

I think the CMP is a little out of touch with all the variations in design of the decking.