ISO 18953:2025
ISO 18953:2025 Steel structures — Structural bolting — Test methods to determine loss of pretension from faying surface coatings
CDN $125.00
This publication was last reviewed and confirmed in 2025.
Steel structures — Structural bolting — Test methods to determine loss of pretension from faying surface coatings
Description
This document specifies test methods to determine loss of pretension in high-strength bolts due to the presence of coatings on the faying surface(s) of a bolted joint to be used in structural steelwork, when any of the coatings are thick enough to affect the pretension in a bolt in the short term, or can show significant deformation over time under sustained loads (creep-prone materials).
The presence within the grip of the bolt of other materials having considerably smaller stiffness than steel, such as insulation, is not included in this test method.
Edition
1
Published Date
2026-06-18
Status
PUBLISHED
Pages
11
Language
English
Format
Secure PDF
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Abstract
This document specifies test methods to determine loss of pretension in high-strength bolts due to the presence of coatings on the faying surface(s) of a bolted joint to be used in structural steelwork, when any of the coatings are thick enough to affect the pretension in a bolt in the short term, or can show significant deformation over time under sustained loads (creep-prone materials).
The presence within the grip of the bolt of other materials having considerably smaller stiffness than steel, such as insulation, is not included in this test method.
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