Learn how to attach springs to frame
1) Attach the corner-most springs first using corner springs (see step 2), on the ends of the bed, and adjust the border rope so that the knot at the end of the rope is lined up with the end of the last spring clip. Then do the same for the sides.
Note that the ropes on the long sides of the bed are about two inches longer than the bed in order to accommodate the initial stretching of the bed in this direction.
2) The sixteen (now 12) corner springs are placed as shown. Do not put corner springs elsewhere on the bed as they will give the bed a hard bottom, and the corners will be less stable. The corner springs are the longer fatter and tighter springs. It is crucial to use corner springs with your performance springs, as shown, otherwise, the corners will be soft and an athlete who lands in the corner or very near the edge of the bed might fall off.
Note: This is an old diagram, our new beds now use 12 corner springs as the corner bed clips are smaller. In each corner two/side and one/end.
3) Install the remaining springs on the ends working with a partner on the other end. Then align the side bed clips on the border rope and put the rest of the springs on the sides.
4) If the bounce seems too hard, extenders may need to be added. Check where the springs are the longest (stretched out the most), then add extender hooks between the springs and the trampoline frame to adjust the tension. Normally the end springs should be about half (1/2) an inch longer than side springs. (Expect about fifteen (15) inch space for side springs.)
Note that under normal use the bed will increase in size, slightly and the paint will wear in during the first couple weeks under tension. Also the springs will lose some of tension during the first forty 40 hours of use with heavy or powerful athletes. So it is normal that a brand new bed will feel a bit tight.
WARNING - When you install your new string bed, please make sure that the trampoline frame is structurally sound and that there is at least 45.5 inches of clearance from the bed to the floor. You must ensure that there is nothing on the frame or any where else which could obstruct or interfere with the path of the bed at all travel points. Make sure that your frame pads have firm foam and cover the frame and springs of the trampoline.
Note : Most folding trampolines made prior to 1978 have an obstructing undercarriage, these frames should be modified before use with string beds.