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How to build a swimming pool from wood and plastic
Build braces for the side of the pool by placing two pieces of wood the length of the pool on the floor.
Find out what height you want the pool and then cut wood to that length minus the width of the 2 " by 4 ".
Screw the pieces into the wood at minimum 1' distances and maximum 2' distance.
Repeat step 1 and 2 until you have 4 braces like this. Cut 4 pieces of plywood to the height and length of the braces.