3.1 Double side width
3.1.1 Oil tankers
The minimum double side width, Wds, in m, is to be taken as the lesser
of:

Wds = 2.0
3.1.2 Bulk carriers
Double side skin means a configuration where each ship side is constructed by the side
shell and a longitudinal bulkhead connecting the double bottom and the deck. Hopper side
tanks and topside tanks may, where fitted, be integral parts of the double side skin
configuration.
The minimum double side width, Wds, is not to be less than 1 m measured
perpendicular to the side shell.
3.2 Minimum clearance inside the double side
3.2.1 Definition
The minimum clearance is defined as the shortest distance measured between assumed lines
connecting the inner surfaces of the stiffeners on the inner and outer hulls.
3.2.2 Minimum clearance dimensions
The minimum clearance between the inner surfaces of the stiffeners inside the
double side is not to be less than:
- 600 mm when the inner and/or the outer hulls are transversely framed,
- 800 mm when the inner and the outer hulls are longitudinally framed.
Outside the parallel part of the cargo hold, the clearance may be reduced but is not to
be less than 600 mm.