Load issues are not just for multihulls. Scroll through these 15 shots and see how load took this boat apart:

https://www.facebook.com/cseropix/photos...e=3&theater

The loads got so great with the crew weight shifted the compression box supporting the mast exploded. The original load was pushing the bow down. The crew shifted aft to counter that load. The load shifted to straight down the mast onto the mast step and boom the whole world came tumbling down.