Scope and conditions of application 1.1 General This standard sets out rules and requirements relating to the calculation, manufacturing and assembly of steel frames, according to the limit states calculation method. The term "steel framing" applies to structural elements and frames composed primarily of structural steel, including accessories such as welds, bolts or other fasteners necessary for fabrication and assembly. This standard also applies to steel construction elements of structures assembled using other materials. Articles on the fabrication and erection of steel frames demonstrate that the calculation is an integral part of the series of design-manufacture-assembly steps and cannot be considered in isolation. With regard to current practice relating to the manufacture and assembly of structural steel not covered by this standard, consult Appendix A. 1.2 Requirements Requirements relating to steel structures such as bridges, pylons antennas, offshore structures and cold-formed steel structural members are subject to other CSA standards. 1.3 Application The standard applies without reservation to steel frames, except that additional rules and requirements may be necessary for a) uncommon types of construction; b) mixed constructions; (c) steel frames (i) of great height or long span; (ii) which must be transportable or easily dismantled; (iii) exposed to harsh environmental conditions; (iv) exposed to heavy loads such as those from vehicle impacts or explosions; (v) which must meet aesthetic, architectural or other criteria which do not relate to the framework itself; (vi) that require the use of materials or products not listed in Chapter 5; or (vii) which have other particular characteristics likely to influence the calculation, manufacturing or assembly; d) tanks, chimneys, other plate structures, poles and piles; and e) the support frames of the overhead cranes. 1.4 Other standards The use of other standards for the design of steel structural elements or parts is neither justified nor acceptable unless this standard clearly indicates it. The formulas given in this standard may be supplemented by a rational calculation, acceptable to the regulatory authorities, based on theory, analysis and the rules of the art if the margins or safety coefficients at least equivalent to those contained in this standard are ensured (see Annex B). 1.5 Terminology In CSA standards, the term “shall” indicates a requirement, that is, a requirement that the user must follow to ensure compliance with the standard; “should” indicates a recommendation or what is advisable but not obligatory to do; and “may” indicates a possibility or what is permitted to be done. The notes that accompany the articles do not include prescriptions or recommendations. They are used to separate from the text explanations or information that are not properly part of the standard. Notes at the bottom of figures and tables are part of these and can be written as prescriptions. The annexes are qualified as normative (mandatory) or informative (optional) to clarify their application.