ASTM F959/F959M-17a(2023)

Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use with Structural Fasteners, Inch and Metric Series

ASTM International , 11/01/2023

Publisher: ASTM

File Format: PDF

$31.00$63.00

Description

Standard By:ASTM International , 11/01/2023

Published:11/01/2023

Pages:5

File Size:1 file , 280 KB

Language:English

Note:This product is unavailable in Russia, Ukraine, Belarus

1.1This specification covers the requirements for compressible-washer-type direct tension indicators, (DTIs) capable of indicating the achievement of a specified minimum tension in a structural bolting assembly.

1.2Eight types of DTIs in nominal diameter sizes ¹/₂through 1 ¹/₂in. as well as M16 through M36 are covered:

1.2.1Type 325-1-DTIs for use with Specification F3125 Grade A325 Type 1 bolts or Grade F1852 assemblies.

1.2.2Type 325-3-DTIs for use with Specification F3125 Grade A325 Type 3 bolts or Grade F1852 Type 3 assemblies.

1.2.3Type 490-1-DTIs for use with Specification F3125 Grade A490 Type 1 bolts or Grade F2280 assemblies.

1.2.4Type 490-3-DTIs for use with Specification F3125 Grade A490 Type 3 bolts Grade F2280 Type 3 assemblies.

1.2.5Type 8.8-1-DTIs for use with Specification F3125 Grade A325M Type 1 bolts.

1.2.6Type 8.8-3-DTIs for use with Specification F3125 Grade A325M Type 3 bolts.

1.2.7Type 10.9-1-DTIs for use with Specification F3125 Grade A490M Type 1 bolts.

1.2.8Type 10.9-3-DTIs for use with Specification F3125 Grade A490M Type 3 bolts.

1.3DTIs are intended for installation with the protrusions against a hardened surface such as a bolt head, a hardened nut, or a hardened washer. (See Research Council on Structural Connections: Specification for Structural Joints Using High-Strength Bolts.)

1.4This specification provides for furnishing Type 3 DTIs to a Chemical Composition Requirement or a Corrosion Resistance Index (CRI) at the manufacturer''s discretion.

1.5Terms used in this specification are defined in Terminology F1789 unless otherwise specified.

1.6The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

1.7The following precautionary statement pertains only to the test method portions, Section 10 and Appendix X1 of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.8This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.