You can skip the back story and go to the last paragraph for my question.
I'm trying to host a table tennis club in the school I work at, and as everyone knows tables take up a lot of space. To combat the space issue, I plan on collecting low cost, used tables online, removing the frame/structure below, and keeping just the top. Storing the just top is saves a lot more space and I have tables the tops can sit on that put the tables 1 cm below regulation height, so it's almost perfect.
Last week (on a Friday) a student donated a top that wasn't in use. I removed the frame leaving just the board/top. And played a couple hours of table tennis after school with students. When everyone was done I placed the two halves upright against a wall for the weekend. Over the weekend I purchased another used table, but kept frame on that goes around the underside boarder, which gives support each half of the table.
I returned to the school on Monday to find that the two piece I used on Friday had warped significantly. All 4 corners on both tables were bending downward to a very obvious degree. They weren't stored in the best conditions, so it wasn't too surprising. I laid the two halves flat on the floor and put heavy objects on top to reduce some of the warping. The table I picked up over the weekend was checked a couple days after I put it into storage and noticed that even though there is a metal frame around the boarder, it was still starting to bend. The newer table was stored in much better condition. Both tables were leaning up against a wall, and the only space I have for them is to lean up against the wall; I can't lay them flat forever.
My question is... does anyone recommend a conversion top that can lean up against walls or be stacked next to each other without warping at the corners? My friend had a pool table top that wasn't always on top of the pool table and instead was leaned against the wall when not in use, and I never recall it warping. It has been years since they sold their pool table and table top, and even longer since his family purchased it, so they don't know the brand. Any suggestions would help. Thanks for reading and I'm looking forward to replies/suggestions.
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