Additional Installation instructions Please note that the non folding trampoline you have purchased has three types of springs in order to provide the best possible bounce. The largest of the three springs are corner springs, and should be installed 4 per corner as per the installation instructions provided with your trampoline bed. The smallest of the three springs (30) are for the ends of the trampoline. And the standard HP springs are for the sides of the trampolines. Please ensure that the springs are installed correctly with hooks down for safety. Buyer accepts responsibility for the proper installation of the non folding trampoline. Warning : Improper installation of the trampoline frame could result in catastrophic injury paralysis or even death. Please consult a qualified engineer prior to mounting the trampoline frame on your pit. Rebound products warrants that its products are free from material defects but cannot be held responsible for any incorrect installation. If you have any questions please call (877) 573-2686.