Over deze norm
1.1 This specification covers the requirements for compressible-washer-type direct tension indicators, (DTIs) capable of indicating the achievement of a specified minimum bolt tension in a structural bolt.
1.2 Eight types of DTIs in nominal diameter sizes 1/2 through 11/2 in. as well as M16 through M36 are covered:
1.2.1 Type 325-1—DTIs for use with Specification Type 1 bolts or F or assemblies.
1.2.2 Type 325–3—DTIs for use with Specification Type 3 bolts or Type 3 assemblies.
1.2.3 Type 490–1—DTIs for use with Specification Type 1 bolts or assemblies.
1.2.4 Type 490–3—DTIs for use with Specification Type 3 Type 3 assemblies.
1.2.5 Type 8.8-1—DTIs for use with Specification Type 1 bolts.
1.2.6 Type 8.8-3—DTIs for use with Specification Type 3 bolts.
1.2.7 Type 10.9-1—DTIs for use with Specification Type 1 bolts.
1.2.8 Type 10.9-3—DTIs for use with Specification Type 3 bolts.
1.3 DTIs are intended for installation under either a bolt head or a hardened washer. (See Research Council on Structural Connections: Specification for Structural Joints Using High–Strength Bolts.)
1.4 This specification provides for furnishing Type 3 DTIs to a Chemical Composition Requirement or a Corrosion Resistance Index (CRI) at the manufacturer’s discretion.
1.5 Terms used in this specification are defined in Terminology unless otherwise specified.
1.6 The following precautionary statement pertains only to the test method portions, Section and 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 and health practices and determine the applicability of regulatory limitations prior to use.
|Engelse titel||Standard Specification for Compressible-Washer-Type Direct Tension Indicators for Use with Structural Fasteners|