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Thread: New Pool Owner Builder west of Ft Worth Double mat 8x6 #4 rebar?

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    New Pool Owner Builder west of Ft Worth Double mat 8x6 #4 rebar?

    Hello, like most I have learned quite a bit on this forum and I am finally getting close to breaking ground on my pool. Sorry, no pics yet and it is a rather long first post. I'll try and get a plan uploaded soon. I talked to three pool builders in the area and I am sure any of them would have done a fine job. However, I have a very flexible work schedule and I have built a few houses so I thought I'd try to sub out my own pool. I know building a house and building a pool are not the same but finding/working with subs, getting bids, and getting through the ugly details are probably fairly similar. Not the best time of the season to start an owner build because we are a about to be in peak season but I have been trying to get to this phase for 2 years and my wife is pretty much ready to get it done.

    So, here goes my first question to those of you that have worked on, built/have/or planned a pool. Have any of you seen a rebar schedule with 2 mats/layers of #4 rebar on 8x6 centers for the entire pool? My pool plan is basically 17X40, 3.5 to 9' deep. There is one freestanding wall that goes from 0in to 36in back to 0in. Total length of that wall is roughly 20'. So the wall gradually gets higher out of grade as it gets to the middle of the pool and then back to 0 on the ends. We have some slope (drops apx 48in over 34feet/or 1 foot vertically for every 8.5 feet horizontally). Bottom line is the back of the pool wall will gradually increase to 36in out of grade.

    I would expect the freestanding wall to be doubled up on the rebar. However, the overall engineered plan is basically 2 pools worth of rebar and unfortunately so tight that the gunite company will not shoot it because of fear of shadowing/voids behind the rebar and they shoot a LOT of pools in this area. They said they would have to water down the gunite too much and can't do that. I told him thanks for his honesty, that I sort of expected that answer, and that I'd come up with something else. The double mat, 8x6 rebar plan came from my engineer. Nothing against the engineer but I have never seen a double mat of #4 rebar on 8x6 grid for an entire pool and it makes me wonder if it is needed. He may be right on, I just haven't seen one designed like that and honestly the design doesn't do me any good if I can't get a gunite crew to shoot it. My gut tells me something is not right with this design. Yes I want it to be strong, that is why I paid an engineer but this seems way way overkill. Soil elasticity isn't bad in my area, not great but also not so bad that people have to make drastic changes to their pools from what I have seen. Any ides, comments, or recommendations are appreciated. I'll get back with the engineer again but so far he's just said that's how he designs all his pools. Nice guy but I was hoping to get more out of him than that.

    By the way, I had a very hard time finding an engineer that does pools. I wouldn't say he specializes in pools but I guess he does them on a somewhat routinely basis. I wanted someone I could talk to in person so I did not go with Pool Engeering out in California but I may have to try them next. Thanks again.
    17x40, 3.5 to 9'. Apx 32k gallons. Apx 20 feet of 0 to 36" freestanding wall, 12' tanning ledge, 3hp Pentair intelliflo, 3/4 booster pump, Pentair, 60DE filter, 2 intellibright lights, 2 skimmers, 5? Returns, pebble sheen, ? on Coping, and tile. Fastlane

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    Patrick_B's Avatar
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    Re: New Pool Owner Builder west of Ft Worth Double mat 8x6 #4 rebar?

    Welcome to the forum!

    I could have missed it, but I've never seen one here with that much over kill. Double 8x6 #4 is incredibly over done in my amateur non engineer opinion. I think a single layer of that configuration would be more than enough. It certainly is compared to anything I've seen. I did a lot of research prior to my build here and elsewhere. Never saw any pool with anything near that. Can you add your locale to your Profile details please. Out here, #3 on 10s or even 12s is very common. Granted, we are harder and dryer than DFW, but really? We see lots of builds from Houston and DFW, and I never recall anything with that much rebar in any of them.
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    Re: New Pool Owner Builder west of Ft Worth Double mat 8x6 #4 rebar?

    Quote Originally Posted by 1Lebo4 View Post
    I'll get back with the engineer again but so far he's just said that's how he designs all his pools.
    I would ask him for a better explanation. If everyone just designed everything the same way with enough overkill that it could stand up to the worst conditions then engineers wouldn't be needed. Sounds like he may be trying to cover his butt.
    18' x 36' saltwater inground vinyl pool

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    Re: New Pool Owner Builder west of Ft Worth Double mat 8x6 #4 rebar?

    Thanks for the replies. Patrick, I've never seen anything with that much steel in it either. Ouachita I agree. I get the feeling he doesn't do too many pools but I also wonder if I don't know what I just don't know. I may have to spend another 400 to pool engineering out in California. I call this "stupid tax." Nicer term is this is "just the price of learning." Thanks.
    17x40, 3.5 to 9'. Apx 32k gallons. Apx 20 feet of 0 to 36" freestanding wall, 12' tanning ledge, 3hp Pentair intelliflo, 3/4 booster pump, Pentair, 60DE filter, 2 intellibright lights, 2 skimmers, 5? Returns, pebble sheen, ? on Coping, and tile. Fastlane

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    maxepr1's Avatar
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    Re: New Pool Owner Builder west of Ft Worth Double mat 8x6 #4 rebar?

    I agree with Patrick. I did my own pool as well, #3 is fine.
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    Mod Squad woodyp's Avatar
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    Re: New Pool Owner Builder west of Ft Worth Double mat 8x6 #4 rebar?

    Well.............they are getting all those mini earthquakes out his way.
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