| Part of a series on vessels'
The framespacing of a vessel is the distance between structural members in the hull or superstructure of a vessel. In vessels designed in accordance to, and through the use of classification society rules, the framespacing is dictated by the principal particulars, build strategy, and weight constraints of the vessel. The frame spacing can also be derived through the use of finite element analysis (FEA)to better find the most efficient use of structure.
Generally, an increased framespacing reduces the amount of welding work and structural complexity of a vessel. Reduced framespaces can result in global weight savings from smaller scantlings, and decreased structural intrusion. Framespacings may be locally increased, i.e. in the case of an aluminum superstructure on a steel vessel (aluminum has deeper structural requirements for the same section modulus) or in way of a vessels ice belts (to reduce panel size and thus ice pressure loads on plates). These are known as intermediate or intermediary frames.