Small concrete pour for a partially underground swim spa

Carmel IN

Description

I need quotes for a smaller concrete pour. 🔸What the project is: I am installing a swim spa in my backyard. The exterior dimensions of the swim spa is 94” X 215”. The swim spa will need to sit on **FLAT** 4000 psi, 6” thick, 1/2” rebar + fiberglass reinforced concrete slab. Because the swim spa is taller than a regular hot tub, it will need to be sitting partially below ground. To accomplish this I will build a below ground “vault” for the spa to sit into. 🔸What I will do/my responsibilities: excavate, backfill, *supply* drain tile/channel drain/plastic sump pit to you, construct a 4 row high (32” tall) CMU wall for the “vault” using a 8”x 16” x 8” CMU block (after you’re done pouring the concrete slab/footer), electrical work, hook up sump motor to plumbing so water can be expelled from the sump pit. The “vault” will be bigger than the slab itself to permit access to the swim spa’s mechanical and electrical components. There are two ways (configurations) we can use to construct the foundation for thr “vault”. The CMU block wall will be 10 blocks wide (160”) X 19 blocks long (304”) x 4 blocks tall (32”) regardless of what option/configuration is used. NOTE: With the monolithic slab option (option 1), the exterior dimension of the slab/footer will approximate the CMU wall’s exterior dimension (160” X 304”). With option 2, where the footer is poured separately from the slab itself, the footer must be poured to accommodate a 10 block wide (160” wide) X 19 block long (304”) CMU block wall. Usually footers poured in this manner are wider than the CMU blocks are. You will have to tell me what is customary. 🔸 What I need you to do regardless of which “foundation” configuration we go with: install a 4000 psi, 1/2” rebar/fiberglass reinforced slab and footer (with appropriate vapor barrier and gravel, appropriate drainage tile that terminates into a plastic sump well (including installing the supplied plastic sump well (no electrical, no plumbing, just please terminate the drain tiles into the plastic sump pit), set ties (usually rebar) for CMU block wall to tie into. I will also need you to provide me the dimensions for 1.) the area to be excavated you need for your pour & 2.) the dimensions of the footers. A simple hand drawing would be very helpful. I will have the site excavated to your specifications to make it seamless for you. The footers must be done to code and comply with frost requirements for our area. There are two ways/configurations we can use for the concrete work. May I please have a quote for each option and even your recommendation on which option you’d choose? 🔸Option/configuration 1: Monolithic slab with a footer. A channel drain is placed 6” from where the exterior of the swim spa will sit. A second regular drain tile is located around the exterior perimeter of the footer. Both drainage lines (channel + tile) terminate in the plastic sump pit. Immediately below where the swim spa will the concrete slab must have ***no grade***, it ***must*** be a flat slab there. 🔸Option 2: There is a slab that is 6” larger than the swim spa footprint. The slab is **flat** and has **no grade**. There is a rectangular footer surrounding the slab with space between the slab and the footer. There’s regular drain tile just to the side of and below the slab as well as to the exterior and next to the footer—both of which terminate in a sump pit. I’ve attached drawings of each option/configuration to this ad. I’d like to get started ASAP. I’ve also attached a photo of a channel drain, which only applies to option/configuration 1 (the monolithic slab). If you are interested, please contact me through Craigslist email. No scammers. You must have experience working with concrete. I will be pulling a permit for this job. Your work will be inspected.