Skantling rules for 37' (Frp) cruiser

ISO 12215 is getting to be the 'standard' for fiberglass boats up to 25m
The regular classification societies have pretty much got out of the small boat business.

 

Know where to find a copy of that wonderful International Standards Organizations' work. Those ISO boys just love tell you what to do...Well, that was easy, I just typed in ISO 12215 and they popped up...Such silly names

ISO 12215-6:2008
Small craft -- Hull construction and scantlings -- Part 6: Structural arrangements and details

Abstract

ISO 12215-6:2008 concerns structural details and structural components not explicitly included in ISO 12215-5, ISO 12215-7, ISO 12215-8 and ISO 12215-9. It applies to monohull and multihull small craft constructed from fibre reinforced plastics (FRP), aluminium or steel alloys, wood or other suitable boat building material, with a hull length, in accordance with ISO 8666, of up to 24 m.

ISO 12215-6:2008 fulfils two functions. Firstly, it supports ISO 12215-5 by providing further explanations and calculation procedures and formulae. Secondly, it gives a number of examples of arrangements and structural details which illustrate principles of good practice. These principles provide a standard against which alternative arrangements and structural details can be benchmarked, using the equivalence criteria specified in ISO 12215-6:2008.



ISO 12215-5:2008
Small craft -- Hull construction and scantlings -- Part 5: Design pressures for monohulls, design stresses, scantlings determination
Abstract

ISO 12215-5:2008 applies to the determination of design pressures and stresses, and to the determination of the scantlings, including internal structural members of monohull small craft constructed from fibre reinforced plastics, aluminium or steel alloys, glued wood or other suitable boat building material, with a length of hull in accordance with ISO 8666, between 2,5 m and 24 m.

It only applies to boats in the intact condition and to craft with a maximum speed equal to or less than 50 knots in fully loaded, ready for use conditions.