Profiles of 5-tonners.
Sections showing decrease of breadth and increase of depth in 5-tonners—under 94 and 1730 Rules.
In the autumn of 1881 it was thought a check might be put on this development by adopting a rule somewhat easier on beam than the existing 94 one, and in 1882 it was determined that the tonnage should be reckoned in accordance with the formula:—
(L + B)2 × B / 1730