ISO INTERNATIONAL STANDARD 3898 Fourthedition 2013-03-01 Bases for design of structures Names and symbols of physical quantities and generic quantities Bases du calcul des constructions - Noms et symboles des grandeurs physiques etgrandeurs generiques Reference number IS0 3898:2013(E) ISO IS02013 IS0 3898:2013(E) Contents Page Foreword ..iv 0 Introduction .. 1 Scope. ..1 2 Normative references ..1 3 Names and symbols for physical quantities and units. 3.1 General rules and method for forming and writing names and symbols 3.2 Rules and method for forming and writing names and symbols of physical quantities.. 3.3 Rules for forming and writing names and symbols of units. 4 3.4 Additional rules for forming of symbols 3.5 Tables. .6 Annex A (normative) Definition and scope of generic quantities .29 Bibliography .41 @ IS0 2013 - All rights reserved ii IS0 3898:2013(E) 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, governmental and non-governmental, in liaison with IsO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISo/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 3898 was prepared by Technical Committee ISo/Tc 98, Bases for design of structures, Subcommittee SC 1, Terminology and symbols. This fourth edition cancels and replaces the third edition (Is0 3898:1997), which has been technically revised. The main reasons for this fourth edition of IS0 3898 are application of new techniques and methods in the analysis and design of structures, e.g. probabilistic and partial factor methods, introduction of codes for new design situations, and more advanced materials have increased the need for a more fundamental set of rules for the formation and presentation of symbols, and revisions of the ISO Guide 31 series for the International System of Units (S.I.). The major technical changes from the previous edition are the following: the normative references have been updated; particularly with regard to the Is0 80000 series; the so-called 'kernel-index-method' for forming and writing names and new (compound) symbols ispresented; the presentation of the (tables of) indices has been altered in accordance herewith; the concept of 'generic quantities' is introduced (Annex A). @ IS0 2013 - All rights reserved 么