The hole needs to be one foot larger than your trampoline’s circumference. For example, if your trampoline is a 14 foot trampoline, you need a 15 foot hole. Kapeesh!?
Believe it or not, Acon USA Inc. Trampolines are one of the first trampolines that actually HAVE NO WEIGHT LIMIT. Thicker and stronger frame & mat, along with ultra durable springs are enough to bring confidence for Acon AIr by removing trampoline weight limit. So we come to the bigger question. Is Acon Air 14 foot trampoline worth of your money?
Next, begin screwing your sheet metal to the 2X4 frame. Four 12 foot lengths of sheet metal was used to surround the 14 foot trampoline. Each sheet overlapped the next sheet by about two feet. This prevents the need to cut the sheet metal. Start on one side of the trampoline and bend the sheet metal to fit securely along your 2X4 frame.