SIST EN 846-4:2004

Methods of test for ancillary components for masonry - Part 4: Determination of load capacity and load-deflection characteristics of straps

This European Standard specifies methods for determining the load capacity and load-deflection characteristics of restraint straps fixed to timber joists, rafters and timber wall plates and masonry walls.

Prüfverfahren für Ergänzungsbauteile für Mauerwerk - Teil 4: Bestimmung der Festigkeit und Last-Verformungs-Eigenschaften von Bändern

Diese Europäische Norm legt die Verfahren zur Bestimmung der Festigkeit und Last-Verformungs-Eigenschaften von Bändern fest, die an Holzbalken, Holzsparren und Holzwandplatten sowie an Mauerwerkswänden befestigt werden.

Méthodes d'essai des composants accessoires de maçonnerie - Partie 4: Détermination de la résistance et de la rigidité des brides de fixation

La présente Norme européenne spécifie les méthodes de détermination de la résistance et de la rigidité des brides de fixation fixées à des solives, des chevrons, des sablières en bois de construction et des murs de maçonnerie.

Metode preskušanja dodatnih komponent zidovine – 4. del: Določanje nosilnosti in lastnosti sila-pomik trakov

General Information

• Status: Published
• Publication Date: 31-Dec-2003
• ICS: 91.080.30 - Masonry
• Technical Committee: CAA - Mineral binders and masonry
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2004
• Due Date: 01-Jan-2004
• Completion Date: 01-Jan-2004
• Ref Project: EN 846-4:2001 - Methods of test for ancillary components for masonry - Part 4: Determination of load capacity and load-deflection characteristics of straps

Relations

• Amended By: SIST EN 846-4:2004/A1:2004 - Methods of test for ancillary components for masonry - Part 4: Determination of load capacity and load-deflection characteristics of straps
• Effective Date: 22-Dec-2008

Overview

EN 846-4:2001 - Methods of test for ancillary components for masonry (Part 4) defines standardized laboratory procedures to determine the load capacity and load‑deflection characteristics of restraint straps fixed to timber joists, rafters, timber wall plates and masonry walls. Published by CEN, the standard provides repeatable test configurations, specimen preparation, loading regimes and reporting requirements for straps used to resist wind uplift, horizontal restraint and hold‑down forces in masonry construction.

Key topics and technical requirements

• Scope: Test methods for horizontal and vertical restraint straps fixed into timber elements and masonry walls.
• Specimens: Typical timber specimen is a panel (~1.0 m × 1.2 m) with three joists (47 × 147 mm). Masonry block wall specimens are built to defined joint thicknesses and curing procedures (normally ≥28 days).
• Sampling: Minimum of five specimens per test format (per EN 845‑1 sampling guidance).
• Materials: Requirements for masonry unit conditioning and compressive strength testing, mortar sampling and flow/air/strength testing, and timber (coniferous, strength class C16, moisture ≤18%).
• Apparatus: Strap connector and clamping device, hydraulic ram or screw actuator, reaction frame, load cell (resolution ≤2% full scale) and deflection transducers.
• Loading procedure:
  • Apply a preload of 5% of estimated ultimate load for 1 minute.
  • For masonry specimens: apply 10 kN/m vertical precompression at the top face before axial strap loading.
  • Increase load so failure occurs in ~3 minutes or until strap/fixing fails or 10 mm deflection limit reached.
• Results & reporting:
  • Report individual failure loads to the nearest 10 N, load‑deflection curves and modes of failure.
  • Determine mean load capacity and mean load‑deflection curve across specimens.

Applications / Who uses this standard

EN 846-4 is used by:

• Manufacturers of masonry ties, straps and ancillary fixings for product development, quality control and performance data.
• Independent testing laboratories to produce comparable load capacity and deflection data.
• Structural and façade engineers, specifiers and building control bodies assessing strap performance for wind uplift, restraint and hold‑down design.
• Construction product assessors and procurement teams requiring standardized performance evidence for straps used in masonry construction.

Related standards

• EN 845-1 (ancillary components: ties, tension straps, hangers and brackets)
• EN 336, EN 338 (structural timber)
• EN 1015-3/7/11 (mortar test methods)
• prEN 772-1 / prEN 772-10, prEN 998-2 (masonry and mortar specifications)

EN 846-4:2001 ensures consistent, reproducible test data for restraint straps-critical input for safe design and selection of masonry fixation systems.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2004
0HWRGHSUHVNXãDQMDGRGDWQLKNRPSRQHQW]LGRYLQH±GHO'RORþDQMHQRVLOQRVWLLQ
ODVWQRVWLVLODSRPLNWUDNRY
Methods of test for ancillary components for masonry - Part 4: Determination of load
capacity and load-deflection characteristics of straps
Prüfverfahren für Ergänzungsbauteile für Mauerwerk - Teil 4: Bestimmung der Festigkeit
und Last-Verformungs-Eigenschaften von Bändern
Méthodes d'essai des composants accessoires de maçonnerie - Partie 4: Détermination
de la résistance et de la rigidité des brides de fixation
Ta slovenski standard je istoveten z: EN 846-4:2001
ICS:
91.080.30 Zidane konstrukcije Masonry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 846-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2001
ICS 91.080.30
English version
Methods of test for ancillary components for masonry - Part 4:
Determination of load capacity and load-deflection
characteristics of straps
Méthodes d'essai des composants accessoires de Prüfverfahren für Ergänzungsbauteile für Mauerwerk - Teil
maçonnerie - Partie 4: Détermination de la résistance et de 4: Bestimmung der Festigkeit und Last-Verformungs-
la rigidité des brides de fixation Eigenschaften von Bändern
This European Standard was approved by CEN on 13 October 2001.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 846-4:2001 E
worldwide for CEN national Members.

Contents
page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references.5
3 Principle.6
4 Materials.6
5 Apparatus.7
6 Test specimens .10
7 Procedure.16
8 Test report.17
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 125 "Masonry", the secretariat of
which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by May 2002, and conflicting national standards shall be withdrawn at the latest by
March 2004.
This European Standard follows initial preparation by Working Group 4 "Test methods", taking into account the
proposals submitted by Task Group 4 "Tests for ancillary components".
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.
Introduction
Straps are used in buildings to provide horizontal and vertical restraint for floor and roof constructions against wind
pressure and uplift forces.
1 Scope
This European Standard specifies methods for determining the load capacity and load-deflection characteristics of
restraint straps fixed to timber joists, rafters and timber wall plates and masonry walls.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard
only when incorporated in by amendments or revision. For undated references the latest edition of the publication
referred to applied (including amendments).
EN 336, Structural timber – Coniferous and poplar – Sizes, permissible deviations.
EN 338, Structural timber - Strength classes.
EN 845-1, Specification for ancillary components for masonry - Part 1: Ties, tension straps, hangars and brackets.
prEN 772-1, Methods of test for masonry units - Part 1: Determination of compressive strength.
prEN 772-10, Methods of test for masonry units - Part 10: Determination of moisture content of calcium silicate and
autoclaved aerated concrete units.
prEN 998-2, Specification for mortar for masonry - Part 2: Masonry mortar.
EN 1015-3, Methods of test for mortar for masonry - Part 3: Determination of consistence of fresh mortar (by flow
table).
EN 1015-7, Methods of test for mortar for masonry - Part 7: Determination of air content of fresh mortar.
EN 1015-11, Methods of test for mortar for masonry - Part 11: Determination of flexural and compressive strength
of hardened mortar.
3 Principle
Straps are fixed to masonry walls, timber joists or rafters or to other floor/roof materials and loaded in a manner
representative of their intended use.
4 Materials
4.1 Masonry units
4.1.1 Sampling
All of the masonry units for individual tests and for making the masonry specimens shall be taken from the same
consignment.
4.1.2 Conditioning of the units
The conditioning of masonry units shall be as specified:
Record the method of conditioning the units prior to laying. Record the age of non autoclaved concrete units at the time
of testing the strap specimens. Measure the moisture content by mass of autoclaved aerated concrete and calcium
silicate masonry units in accordance with prEN 772-10.
4.1.3 Testing
Determine the compressive strength of a sample of masonry units using the method given in prEN 772-1. For
non-autoclaved concrete units, determine the compressive strength at the time of testing the strap specimens.
NOTE  Where the strength of the masonry units will change with time, the compressive strength test should be carried out on the
same day as the test.
4.2 Mortar
The mortar, its mixing procedure and its flow value shall be as specified and conform with the requirements of prEN
998-2, unless otherwise specified and these shall be reported in the test report.
Take samples of mortar from the mason's board to make mortar specimens and determine the flow value of fresh
mortar in accordance with EN 1015-3, the air-content of the fresh mortar in accordance with EN 1015-7 and the
compressive strength of mortar in accordance with EN 1015-11 at the time of testing the masonry specimens.
4.3 Timber
Timber sections shall be of coniferous timber as specified in accordance with strength class C16 of
EN 338 and a moisture content of not greater than 18 % by mass.
4.4 Fixings
Fixings shall be as specified by the manufacturer, in a clean dry uncontaminated state.
5 Apparatus
A device for clamping and applying axial tensile force to the strap. A typical arrangement is de
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