ISO 19323:2018

Timber structures — Joist hangers — Test methods

This document provides standard test methods for determining the vertical load, axial load and torsional moment capacity as well as deflection characteristics of preformed three-dimensional joist hangers that are used primarily for securing one timber member to another (the header can be concrete or masonry). The joist hangers primarily transfer vertical loads from the supported member to the supporting member, but they can also be required to transfer axial loads from the supported member to the supporting member. NOTE 1 Structural steel sections can also be substituted as the header, but are not covered in this document. NOTE 2 One secondary mechanism to be considered is the effect of rotation of the supported member about its longitudinal axis on the joist hanger.

Structures en bois — Étriers à solive — Méthodes d'essai

General Information

• Status: Published
• Publication Date: 18-Sep-2018
• ICS: 91.080.20 - Timber structures
• Technical Committee: ISO/TC 165 - Timber structures
• Drafting Committee: ISO/TC 165/WG 7 - Connections and assemblies

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19323
First edition
2018-09
Timber structures — Joist hangers —
Test methods
Structures en bois — Étriers à solive — Méthodes d'essai
Reference number
©
ISO 2018
© ISO 2018
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Materials . 2
5.1 Timber . 2
5.2 Concrete or masonry . 3
5.3 Fasteners . 3
5.4 Joist hangers . 3
6 Sampling . 3
7 Test apparatus . 4
7.1 Testing machine . 4
7.2 Displacement transducers . 4
8 Tests . 4
8.1 General . 4
8.2 Vertical load test . 4
8.2.1 Test setup . 4
8.2.2 Test procedure . 7
8.2.3 Test report . 8
8.3 Tension load test . 8
8.3.1 Test setup . 8
8.3.2 Test procedure . 9
8.3.3 Test report . 9
8.4 Torsional load test .11
8.4.1 Test setup .11
8.4.2 Test procedure .13
8.4.3 Calculation of torsional moment and rotation .13
8.4.4 Test report .14
8.5 Cyclic vertical load test.15
8.5.1 Test setup .15
8.5.2 Test procedure .15
8.5.3 Test report .15
Bibliography .17
Foreword
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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This document was prepared by Technical Committee ISO/TC 165, Timber structures.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv © ISO 2018 – All rights reserved

Introduction
Joist hangers are an integral part of timber constructions in that they provide a necessary means of
connection between timber elements and also between timber elements and other materials such as
metal, concrete and masonry. Hangers are made predominantly from light gauge steel sheet which is
electrolytically or hot-dipped galvanised and which is bent into a formed three-dimensional element
– mostly U-shaped to allow for a bearing seat and lateral support to the joist. For high corrosion zones,
stainless steel is often used in lieu of galvanised steel sheet. Hangers may also be made from welded
steel plates.
To provide a suitable connection, the joist hangers are capable of transferring forces in a range of
directions depending on the make-up of the joint. Fasteners (e.g. nails, screws, bolts and dowels and
proprietary fasteners) are inserted in the pre-punched or pre-drilled holes of the joist hanger plates
(bearing seat, face and top plate) to secure the connection between the joint elements. The purpose of
this document is to provide standard test procedures that can be used to determine the strength of a
joint incorporating a joist hanger.
INTERNATIONAL STANDARD ISO 19323:2018(E)
Timber structures — Joist hangers — Test methods
1 Scope
This document provides standard test methods for determining the vertical load, axial load and
torsional moment capacity as well as deflection characteristics of preformed three-dimensional joist
hangers that are used primarily for securing one timber member to another (the header can be concrete
or masonry). The joist hangers primarily transfer vertical loads from the supported member to the
supporting member, but they can also be required to transfer axial loads from the supported member
to the supporting member.
NOTE 1 Structural steel sections can also be substituted as the header, but are not covered in this document.
NOTE 2 One secondary mechanism to be considered is the effect of rotation of the supported member about
its longitudinal axis on the joist hanger.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1920-4, Testing of concrete — Part 4: Strength of hardened concrete
ISO 1920-6, Testing of concrete — Part 6: Sampling, preparing and testing of concrete cores
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 8970, Timber structures — Testing of joints made with mechanical fasteners — Requirements for
wood density
ISO 9652-4, Masonry — Part 4: Test methods
ISO 10984-1, Timber structures — Dowel-type fasteners — Part 1: Determination of yield moment
ISO 10984-2, Timber structures — Dowel-type fasteners — Part 2: Determination of embedding strength
ISO 13061-1, Physical and mechanical properties of wood — Test methods for small clear wood specimens —
Part 1: Determination of moisture content for physical and mechanical tests
ISO 13061-2, Physical and mechanical properties of wood — Test methods for small clear wood specimens —
Part 2: Determination of density for physical and mechanical tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
supporting member
header
member supporting a joist hanger
3.2
supported member
joist
bending or a tension member supported by a joist hanger
3.3
joist hanger
metal device, usually cold-formed from light-gauge steel sheet, used to transfer loads from a joist to a
header member or wall in building construction
Note
...