I am a Stringer What you want to know?

A stringer on a boat is what the motor mounts [plates] bolt to. if some one had a lot of power it will stress crack the fiberglass around them and weaken them . also if someone jumps a lot of waves it will do the same thing . or the have a design [lamination] problem when building the hull.

Do a search on it http://www.offshoreonly.com/forums/search.php