A. GENERAL PROVISIONS
This chapter addresses the scope and applicability of the
Specification, lists the definitions of the terminology used, summarizes referenced specifications, codes, and standards, and provides requirements for materials.
This chapter is organized as follows:
- A1 Scope, Applicability, and Definitions
- A2 Referenced Specifications, Codes, and Standards
- A3 Material
A1 Scope, Applicability, and Definitions
A1.1 Scope
This
Specification applies to the design of
structural members cold-formed to shape from carbon or low-alloy steel sheet, strip, plate, or bar not more than 1 in. (25.4 mm) in
thickness and used for
load-carrying purposes in
(a) Buildings, and
(b) Structures other than buildings provided allowances are made for dynamic effects.
A1.2 Applicability
This
Specification includes Symbols, Chapters A through M, Appendices A and B, and Appendices 1 and 2 that shall apply as follows:
- Chapters A through M, Appendices 1 and 2—the United States, Mexico, and Canada,
- Appendix A—the United States and Mexico, and
- Appendix B—Canada.
The symbol 👈x is used to point out that additional provisions that are specific to a certain country are provided in the corresponding appendices indicated by the letter(s) "x."
This
Specification includes design provisions for
Allowable Strength Design (ASD) ,
Load and Resistance Factor Design (LRFD), and
Limit States Design (LSD). These design methods shall apply as follows:
- ASD and LRFD—the United States and Mexico, and
- LSD—Canada.
In this
Specification, bracketed terms are equivalent terms that apply particularly to LSD.
The
nominal strength [resistance] and stiffness of cold-formed steel components such as elements, members, assemblies,
connections, and details shall be determined in accordance with the provisions in Chapters B through M, Appendices A and B, and Appendices 1 and 2 of the
Specification.
Where the composition or configuration of the components is such that calculation of
available strength [factored resistance] or stiffness cannot be made in accordance with these provisions (excluding those in Chapter K), structural performance shall be established from one of the following:
(a)
Available strength [factored resistance] or stiffness by tests only. Specifically, the
available strength [factored resistance] is determined from tested
nominal strength [resistance] by applying the
safety factors or the
resistance factors evaluated in accordance with Section K2.1.1(a);
(b)
Available strength [factored resistance] by
rational engineering analysis with
confirmatory tests. Specifically, the
available strength [factored resistance] is determined from the calculated
nominal strength [resistance] by applying the
safety factors or
resistance factors evaluated in accordance with Section K2.1.1(b);
(c)
Available strength [factored resistance] or stiffness by
rational engineering analysis based on appropriate theory and engineering judgment. Specifically, the
available strength [factored resistance] is determined from the calculated
nominal strength [resistance] by applying the following
safety factors or resistance factors:
For members
Ω = 2.00
(ASD)
f = 0.80
(LRFD)
= 0.75
(LSD)
For
connections
Ω = 3.00
(ASD)
f = 0.55
(LRFD)
= 0.50
(LSD)
When
rational engineering analysis is used in accordance with Section A1.2(b) or A1.2(c) to determine the
nominal strength [resistance] for a
limit state already provided in this
Specification, the
safety factor shall not be less than the applicable
safety factor (Ω), nor shall the
resistance factor exceed the applicable resistance factor (f) for the prescribed
limit state.
A1.3 Definitions
In this
Specification, "shall" is used to express a mandatory requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the
Specification; and "is permitted" is used to express an option or that which is permissible within the limits of the
Specification. In standards developed by the CSA Group, "is permitted" is expressed by "may."
The following terms are italicized when they appear in the
Specification. Definitions listed under the
ASD and
LRFD Terms sections shall apply to the USA and Mexico, while definitions listed under the
LSD Terms section shall apply in Canada.
Terms designated with * are usually qualified by the type of
load effect; for example,
nominal tensile strength, available compressive strength.
Terms designated with + are common AISC-AISI terms that are coordinated between the two standards developers.
| Edition : | 9th |
| File Size : | 1
file
, 7.5 MB |
| ISBN(s) : | 9781488306105 |
| Note : | This product is unavailable in Russia, Ukraine, Belarus |
| Number of Pages : | 512 |
| Product Code(s) : | 2424735, 2424735 |
| Published : | 10/01/2019 |
