Example: Diving Board

A diving board is attached to the pool side by 2 bolts and 2 springs.

The directions from the manufacturer state that the maximum capacity of the diving board is 300lbs.

Through testing you have found that by tightening thebolts all the way down so the springs collapse, the diving board can at least hold 350lbs.

This additional 50lbs is the reserve.

Setting up for a 350lb diver makes this board maxed out. Much like bow limbs when the reserve has been accounted for.