Construction and Engineering

Origin: CSA
Close date: Sep 27, 2018
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Scope 

1.1 General

This Standard provides rules and requirements for the design, fabrication, and erection of a broad range of steel structures based on limit states design approach. The term “steel structures” refers to structural members and frames that consist primarily of structural steel components, including structural steel acting compositely with concrete, and detail parts, welds, bolts, or other fasteners required in fabrication and erection. This Standard also applies to structural steel components in structures framed in other materials. The clauses related to fabrication and erection serve to show that design is inextricably a part of the design-fabrication-erection sequence and cannot be considered in isolation. For matters concerning standard practice pertinent to the fabrication and erection of structural steel not covered in this Standard, see Annex A.

1.2 Requirements

Requirements for steel structures such as bridges, antenna towers, offshore structures, and cold-formed steel structural members are given in other CSA Standards.

1.3 Application

This Standard sets out minimum requirements and is expected to be used only by engineers competent in the design of steel structures. It applies unconditionally to steel structures, except that supplementary rules or requirements might be necessary for

a) unusual types of construction;

b) mixed systems of construction;

c) steel structures that

i) have great height or spans;

ii) are required to be movable or be readily dismantled;

iii) are exposed to severe environmental conditions;

iv) are exposed to severe loads such as those resulting from vehicle impact or explosion;

v) are required to satisfy aesthetic, architectural, or other requirements of a non-structural nature;

vi) employ materials or products not listed in Clause 5; or

vii) have other special features that could affect the design, fabrication, or erection;

 

d) tanks, stacks, other platework structures, poles, and piling; and

e) crane-supporting structures

 

1.4 Other standards

The use of other standards for the design, fabrication, erection, and/or inspection of members or parts of steel structures is neither warranted nor acceptable except where specifically directed in this Standard. The design formulas provided in this Standard may be supplemented by a rational design based on theory, analysis, and engineering practice acceptable to the regulatory authority, provided that nominal margins (or factors) of safety are at least equal to those intended in the provisions of this Standard. The substitution of other standards or criteria for fabrication, erection, and/or inspection is expressly prohibited unless specifically directed in this Standard.

1.5 Terminology

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application
Origin: CSA
Close date: Oct 3, 2018
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Scope

1.1

This Standard provides criteria and requirements for design of a durable building and building elements, and includes provisions for a quality management program for the design, construction, operation, maintenance, repair and renovation of the building and its building elements.  

1.2

This standard applies to the building including its members and their connections, and to a building element where the building and the building element are required to resist loads from the structure environment and their effects, and

are exposed to exterior space or the ground; or

separate interior space from exterior space or separate interior space from the ground; or

separate environmentally dissimilar interior spaces. 

1.3

The Standard includes:

definitions for performance, failure, service life, and other concepts related to building durability;

the basic durability requirement for the design of a new, or the repair or renovation of an existing building and building elements;

compliance criteria for the design for durability of a building and building elements, including requirements for design service life and predicted service life;

compliance criteria for construction processes that affect durability;

compliance criteria for quality management, and for an operation, maintenance and inspection program;

for existing buildings, requirements for investigation of degradation of a building and building elements, assessment, repair and maintenance; and

guidance on the use of this standard, on selecting a design service life for a building and building elements, on determining a predicted service life, on assessment of structure environments, and on degradation mechanisms.

1.4

This standard is intended to be used throughout all stages of the building life cycle. This standard is intended to be used by designers from design conception to building handover. This standard is intended to be used by building owners particularly after building handover and for operation and maintenance in conjunction with the designer, and for repair and renovation.  

Notes:

Designers should consult with the building owner from design conception to building handover.

The nature of the contract between the designer and the owner might affect the responsibilities for implementing this Standard after building handover, however, the intent is to ensure seamless transition and cooperation and communication between the designer and the owner throughout all stages of the building life cycle to ensure durability and reliability.

1.5

The durability of mechanical systems, electrical systems, and services in buildings is not within the scope of this Standard.   The durability of building finishes, except those providing a performance control function is not within the scope of this Standard.

Notes:

While not addressed specifically, it is recognized that design for durability of a building and building elements, mechanical systems, electrical systems, and services should be included in an integrated design.

The loads on a building and the building elements that result from the operation of the systems and services should be considered along with the structure environment and structural loads.

 

Origin: CSA
Close date: Nov 7, 2018
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1  Scope

1.1  General

This Standard provides criteria, in accordance with the National Building Code of Canada for the structural design and evaluation of structures or structural elements made from wood or wood products, including:

graded lumber,

glued-laminated timber,

cross-laminated timber (CLT),

unsanded plywood,

oriented strand board (OSB),

composite building components,

shearwalls and diaphragms,

timber piling,

pole-type construction,

prefabricated wood I-joists,

structural composite lumber products,

permanent wood foundations,

plank decking,

nail laminated decking, and 

structural connections.

This Standard employs the limit states design method.

1.2  Terminology

In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

Origin: CSA
Close date: Nov 7, 2018
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Scope

1.1
General

This Standard applies to structural antennas, towers, antenna-supporting structures, and roof- and wall-mounted structures, including their components, such as guys and foundations. It covers the structural design, fabrication, and erection of new structures and the modification of existing structures.

1.2
Exclusions

This Standard is not intended to apply to

a) attachment antennas and arrays or assemblies of such antennas; or
b) towers that support attachment antennas, extending less than 15 m above grade, including the height of any structure on which they are mounted.

1.3
Unusual designs and antennas

This Standard covers the requirements for most structural antennas, antenna towers, and antenna-supporting structures, but it is recognized that structures that are unusual with regard to their height or shape, or with regard to the shape and size of individual members, or that are located on sites having unusual topographical, geological, or climatic conditions might not be adequately covered. In such cases, appropriate engineering principles providing a level of reliability at least equivalent to that provided by this Standard should be applied.

1.4
Dynamic effects of wind

This Standard does not contain mandatory requirements that take into account the dynamic effects of wind.

1.5
Other design approaches

A rational design based on theory, analysis, and engineering practice, acceptable to the owner and regulatory authority, may be used in lieu of the design procedures or materials described in this Standard. In such cases, the design should be prepared by an engineer qualified in the specific method and knowledgeable about the materials to be used, and should provide a level of safety and performance that is not less than that implicit in this Standard.

1.6
Local, provincial, and federal regulations

Responsibility for observing all applicable local, provincial, and federal regulations is not relieved by compliance with this Standard.

1.7
Terminology

In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

Origin: CSA
Close date: Nov 20, 2018
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Scope
1.1

This Standard provides the requirements for the:

(a)  certification of companies engaged in the fusion welding of reinforcing bars  and  the qualification of their personnel and welding procedures;

(b) the design, fabrication, and inspection of welded connections utilizing deformed reinforcing bars;

(c) welding of deformed reinforcing bars either directly to each other or through splice members; and

(d)        welding of deformed reinforcing bars to structural or low-alloy steel members used as anchorages in precast or cast-in-place concrete construction either in the fabricating shop or in the field.

In lieu of meeting requirements of this standard, companies performing welding of reinforcing bars to steel elements may apply testing requirements of CSA W47.1 and have their welding personnel and welding procedures accepted with CSA W47.1.

 

Note: Some examples of applications that may apply certification of CSA W47.1 are:  welding of deformed bars (anchors) to structural or hardware elements when installing precast panels to buildings, lifting devices, base plates, ladders, catwalks, etc. Whenever the welding of reinforcing rebars is required to reinforce the concrete in applications like concrete, precast, cast in place construction, etc. provisions of CSA Standard W186 apply. Applications required by the following standards require certification to this standard: CSA A448.1, A23.1, A23.3, A23.4, N287.2, N287.3, N287.4, N287.5, S304.1, S6, S474, S850 and Z98.   

1.2  

This Standard does not cover requirements for the:

(a) welding of plates, angles, or other structural members to one another. These types of applications are covered by CSA Standard W59, Welded Steel Construction;

(b) welding of deformed reinforcing bars used for pre-stressing steel or for bar or rod mats for which the welding is covered by the manufacturing specification; and

(c)  welding reinforcing bars with specified yield strength exceeding 550 MPa (80 ksi).

 

1.3

The requirements of this Standard are based on the principle that a certified company has full responsibility for the quality of the welded product it produces and this responsibility cannot   be transferred to its employed or retained personnel or to the administrator of this Standard.

 

1.4

This Standard governs the certification of companies. Certification pertains to the capability of   the company with respect to welding. Certification should not be construed as approving any products or services of the certified company.

 

1.5

This Standard stipulates requirements for

(a) welding engineers;

(b) welding supervisors;

(c) welders and welding  operators; and

(d) documentation.

1.6

The qualification requirements for welders, and welding operators specified in this Standard are intended to demonstrate an individual’s basic welding skills and to provide a means of verifying that individual’s continuing ability in the fusion welding of steel.

 

1.7

Provisions for recognition of personnel qualified under other jurisdictions are included in this Standard.

 

1.8

This Standard includes provisions for the following:

(a) shielded metal arc welding (SMAW);

(b) gas metal arc welding (GMAW);

(c) flux-cored arc welding (FCAW) and metal cored arc welding; and

(d) metal-cored arc welding (MCAW).

 

1.9 Base metal

1.9.1 General

Steel base metal to be welded under this Standard should conform to the requirements of the CSA or ASTM Standards listed in Clauses 1.9.2 and 1.9.3 or other recognized specifications of equivalent welding quality as determined by the company’s engineer and approved by the engineer. Equivalent welding quality shall be established on the basis of composition and carbon equivalent.

1.9.2 Reinforcing Bars

Reinforcing bars to be fusion welded in accordance with this Standard should conform to one of the following Standards:

(I) CSA:

(a)    G30.16; or

(b)   G30.12; or

(c)   G30.18; or

(d)   other specifications approved by the owner provided mill test reports are supplied and carbon equivalent must not exceed 0.55% when calculated as shown in Clause 1.9.4.

(II) ASTM:

(a) A82/82M;

(b) A496/A496M;

(c) A615/615M;

(d) A706/706M;

(e) A767/A767M zinc-coated (galvanized) reinforcing bars that meet the requirements of A615/A615M or

     A706/A706M;

(f) A775/A775M epoxy-coated reinforcing bars that meet the requirements of A615/A615M or

     A706/A706M; and

(g) A934/A934M epoxy-coated prefabricated reinforcing bars that meet the requirements of A615/A615M

     or A706/A706M.

 

1.9.3 Structural Steel

Plates, angles, or other shapes for splices of bars and plates, or other structural steel members to which bars are anchored should conform to the steels listed in CSA W59, latest edition.

 

 

 

1.9.4 Carbon equivalent

The carbon equivalent (CE) of reinforcing bars must not exceed 0.55% when calculated with the following formula:

 

CE=%C + %Mn/6 + %Cu/40 + %Ni/20 + %Cr/10 - %Mo/50 - %V/10

 

In addition, the ratio of Mn:C (expressed as wt.%) must be 3.0 or greater.

 

1.9.5 Material test reports

If the material test reports (MTR) are not available, chemical analysis to determine the carbon equivalent (CE) may be made on reinforcing bars similar to the reinforcing bars to be welded. If the chemical composition is not known or cannot be obtained the following procedures should be applied:

 

(a)  for bars number 20 or less, use a minimum preheat of 150°C (300°F);

(b)  for bars number 25 or larger, use a minimum preheat of 250°C (500°F); and

(c)  for all bar sizes of ASTM A706/A706M minimum preheat must be as described in Table  8 as listed for CE of over 0.45% to 0.55% inclusive.

 

1.10

This  Standard  does  not address  the  safety issues associated with  welding and welding practices.

Note: CAN/CSA-W117.2 addresses safety in welding and should be followed, in addition to any applicable workplace health and safety legislation in effect. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 

1.11

This Standard does not address underwater welding activities.

 

1.12

In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

 

1.13

The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.

 

1.14 Welding terminology

Most of the welding terms used in this Standard are defined in AWS A3.0M/A3.0. See Annex E for a selected list of definitions derived from that Standard. Annex E also includes definitions of terms used in this Standard that are not covered in AWS A3.0M/A3.0.

 

1.15 Symbols

Welding symbols shall be as shown in AWS A2.4. Special requirements are fully explained by notes or details. See Figure 18 for symbols developed for incorporation into this Standard.