Hi Tech Materials. Next, let's consider the functions of the structural members that the grids are taking over. The function of the bulkhead is primarily to prevent a hull from wracking or twisting in a torsional mode. Additionally, it also serves as a transverse frame. Stringers are longitudinal frames, probably better represented by the word girder than frames since we traditionally think of frames as transverse members.
Stringers are uniquely critical to power boats since powerboats travel at much higher speeds.
The forces that work on a power boat hull tend to want to break it in half, similar to the way a bridge wants to collapse in the middle. Thus, good, strong stringers are needed to keep the hull from bending in this direction. The above photo shows what happens when this principle is compromised. Bonding failures can sometimes be difficult to detect. This broken liner bond was only discovered by sounding because the break was obscurred by a dirty bilge.