ASTM C955-2017 pdf free download
ASTM C955-2017 pdf free download.Standard Specification for Cold-Formed Steel Structural Framing Members
1. Scope
1.1 This specification covers cold-formed steel structural framing members (with a base steel thickness of not less than 0.0329 in. (0.836 mm)) in load-bearing (transverse and axial) construction assemblies. Steel of lesser thickness shall be permitted in additional engineered products. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Terminology
3.1 Definitions: 3.1.1 Definitions shall be in accordance with Terminology C11. 3.2 Definitions ofTerms Specific to This Standard: 3.2.1 members, n—studs, runners, tracks, bracing, bridging, accessories, or other items manufactured in accordance with this specification. 3.2.2 structural member, n—a member in a steel framed system in which the loading exceeds any of the following conditions: a transverse load of 20 lbf/ft (290 N/m) of member length, or an axial load, exclusive of sheathing, of 200 lbf (890 N) per member.
4. Materials and Manufacture
4.1 Members shall be manufactured from steel meeting the requirements of Specification A1003/A1003M. 4.2 The minimum steel thickness (base steel) shall be not less than 0.0329 in. (0.84 mm). 4.3 Individual measurements before the application of pro- tective coating shall be not less than 95 % of the specified design thickness. 4.4 Members shall have a protective coating in accordance with Table 1, CP 60 minimum. 4.5 Edges of members shall be manufactured to minimize burrs and sharp edges. 4.6 Factory punch-outs, when provided, shall be located along the centerline of the webs of members and shall have center-to-center spacing of not less than 24 in. (610 mm). Web punch-outs maximum width shall be the lesser of 0.5 times the member depth, d, or 2 1 ⁄ 2 in. (64 mm). Web punch-out length shall not exceed 4 1 ⁄ 2 in. (114 mm). Minimum distance between the end of the member and the near edge of the web punch-out shall be 10 in. (254 mm). The size of the factory punch-outs shall not exceed the size used in design and the center-to-center spacing shall not be less than that used in design. 4.7 The properties and strength of members shall be com- puted in accordance with the AISI S100.
5. Dimensions and Permissible Variations
5.1 Data for calculating design performance shall be sup- plied by the manufacturer. 5.2 The width of the surface to which the sheathing board is attached shall be not less than 1 1 ⁄ 4 in. (32 mm). 5.3 Runners (track) shall be formed in a U-shaped configuration, having a depth compatible with that of the studs of the same nominal size. 5.4 Minimum height of runner (track) flanges shall be 1 1 ⁄ 4 in. (32 mm). 5.5 Members shall be manufactured within the limits as shown in Table 2 and Fig. 1. 5.6 Bracing and bridging shall have configuration and steel thickness to provide secondary support for the studs in accor- dance with the AISI S100.
8. Rejection
8.1 When specified in the purchase agreement, members that fail to conform to the requirements of this specification shall be rejected. Rejection shall be reported to the producer or supplier promptly and in writing. The notice of rejection shall contain a statement documenting how the member has failed to conform to the requirements of this specification and the purchase agreement.
9. Certification
9.1 When specified in the purchase agreement, a producer’s or supplier’s report shall be furnished at the time of shipment certifying that the product is in compliance with this specifi- cation.
