ISO INTERNATIONAL STANDARD 5572 First edition 1987-11-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXKAYHAPOAHAA OPrAHW3ALM O CTAHAAPTM3ALMM Shipbuilding and marine structures - Numbering of equipment and structural elements in ships Construction navale et structures maritimes -- Numerotation des materiels et élements de structure des navires Reference number ISO 5572 : 1987 (E) Not for Resale tted without license from IHS Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with Iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by least 75 % approval by the member bodies voting. International Standard ISO 5572 was prepared by Technical Committee 1SO/TC 8, Shipbuilding and marine structures. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. ? International Organization for Standardization,1987 Printed in Switzerland Not for Resale ISO 5572 : 1987 (E) INTERNATIONAL STANDARD Shipbuilding and marine structures s - Numbering of equipment and structural elements in ships Scope and field of application This system of numbering is intended primarily as a means of 7 labelling stations for reference purposes, but it is preferable This International Standard specifies the conventions to be that the numbers correspond to the actual positions of the used in numbering reference stations, waterlines, structural stations according to a linear scale. frames, transverse bulkheads, decks, compartments (holds, 'tween-decks, tanks), hatchways, masts and cargo-handling equipment where reference numbers are required for use in computer programs. Waterlines 3 It applies in particular to conventional mono-hull merchant ships, and may require adaptation for other configurations and Waterlines shall be identified by their heights in metres above for warships. the baseline; they may be spaced as required. Where hull form The existence of this International Standard does not release data is presented in non-dimensional form, waterline heights the designers of computer programs from the obligation to pro- shall be normalized as decimal fractions of the designed load vide flexibility to accommodate other conventions which may waterline height. be required in particular circumstances but the conventions specified may be used as default options. Structural frames 4 Reference stations 2 Structural frames shall be identified by integer numbers. The Design stations used as reference stations in the length of the first frame forward of the after perpendicular, or the frame at ship shall be numbered according to a decimal system based on the after perpendicular if coincident, shall be designated frame either 10 or 100 primary intervals between the perpendiculars, O (zero) and the remaining frames shall be numbered in se- the after perpendicular being designated station 0.0 and the quence, frames forward of frame C being given positive integer forward perpendicular either station 10.0 or station 100.0. The numbers and frames after frame O negative integer numbers. expressed as decimal remaining primary stations shall be numbers having zero as the fractional part (e.g. 5.0 or 50.0). Where intermediate stations are required they should be ident- Transverse bulkheads, web frames and part frames which do