Member
· Västra Götaland
· 3 posts
Hi, I am planning to build an indoor pool, have removed the subfloor and will use the room below as a pool room. The problem is that the water depth/volume becomes too large, so I am thinking of building an "upside-down box" by constructing walls and then casting the pool bottom on top of the walls. There will also be 2 partition walls, and I estimate that the load will be the pool volume of 22m3 on a 15 m2 area. With the 2 partition walls, the load becomes 22/3=7 tons on 5m2. The question is, therefore, how thick should I cast the pool bottom (think ceiling)? Very grateful for a considered response/ Klas
Build the walls first and then fill with gravel at the bottom to about 20 cm below what will be the bottom of the pool, compact it. Then place a ground cloth on the gravel and pour about 15 cm with a reinforcement mesh, 8 mm is sufficient. This will give you a solid slab for the pool with no hanging part. You can also lay insulation under the concrete, which is not a bad idea for heat retention. What are you considering for the finish, vines or tiles?
Member
· Västra Götaland
· 3 posts
Thanks for the response, I was thinking of leaving it empty underneath and having openings so I can use it as storage. I'm not very good with concrete but thinking 15cm thick on an area that is 3.2x1.4 feels a bit overkill, please correct me because I'm learning?
Answer no, free-hanging vaults in regular apartment buildings are 15 - 20 cm with double reinforcement 12 mm and in grids of 200 mm.K Klas Pettersson said:
Then, as you want to have storage underneath, at least 20 cm vault with reinforcement in or 15 cm with a pillar in the middle.
Then there must be walls that are well-founded to support it. But I won't go into that part. Since you're asking and don't know, you're getting an answer accordingly. I think you should contact someone who can calculate it properly. Pouring vaults is not something done on a whim.