BS EN 846-6-2012 Methods of test for ancillary components for masonry Determination of tensile and compressive load capacity and load displacement characteristics of wall ties (sin.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 846-6:2012Methods of test for ancillarycomponents for masonryPart 6: Determination of tensile andcompressive load capacity and loaddisplacement characteristics of wall ties

2、(single end test)BS EN 846-6:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 846-6:2012. Itsupersedes BS EN 846-6:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/519/3, Ancillary components.A list of org

3、anizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012

4、ISBN 978 0 580 69586 5ICS 91.080.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2012.Amendments issued since publicationDate Text affectedBS EN 846-6:

5、2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 846-6 August 2012 ICS 91.080.30 Supersedes EN 846-6:2000English Version Methods of test for ancillary components for masonry - Part 6: Determination of tensile and compressive load capacity and load displacement characteristics of wall ties (s

6、ingle end test) Mthodes dessai pour composants accessoires de maonnerie - Partie 6: Dtermination de la rsistance de traction et en compression et de la rigidit dattaches murales (essai dextrmit simple) Prfverfahren fr Ergnzungsbauteile fr Mauerwerk - Teil 6: Bestimmung der Zug- und Drucktragfhigkeit

7、 sowie der Steifigkeit von Mauerankern (Einseitige Prfung) This European Standard was approved by CEN on 11 February 2012. 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 with

8、out any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other

9、language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, De

10、nmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITT

11、EE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 846-6:2012: EBS EN 846-6:2012EN 846-6:20

12、12 (E) 2 Contents Page Foreword . 31 Scope 42 Normative references . 43 Principle . 44 Materials . 54.1 Timber frame elements (studs) 54.2 Timber frame sheathing . 54.3 Metal frame or stud elements and concrete elements including lightweight aggregate concrete . 54.4 Masonry units 54.4.1 Sampling 54

13、.4.2 Testing 54.5 Screws, nails, grouts, plugs, slot sections or other fixing ancillary items . 54.6 Sheathing nails 54.7 Concrete for slot type anchors 55 Apparatus 66 Preparation and storage of test specimens . 66.1 General . 66.2 Timber frame . 66.3 Other support materials . 76.4 Ties installed i

14、nto cast in slots 76.5 Masonry units 76.6 Storage . 77 Procedure 77.1 Setting specimen in test machine . 77.2 Test environment 87.3 Loading 88 Expression of results 89 Test report . 8BS EN 846-6:2012EN 846-6:2012 (E) 3 Foreword This document (EN 846-6:2012) has been prepared by Technical Committee C

15、EN/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 February 2013, and conflicting national standards shall be withdrawn at the latest by

16、February 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 846-6:2000. The principal changes in this d

17、ocument form the previous edition relate to the number of ties to be tested, the location of the clamp during testing and the treatment of slope and movement tolerant ties. Ties are to now be placed at the minimum declared embedment length rather than a length calculated from the tie length and desi

18、gn cavity width. Ten ties are tested in tension and ten in compression. In the compression tests the ties are loaded over an extended cavity, or alternatively provision is made for evaluating the cavity section by calculation. Where ties are designed to tolerate either an induced slope or movement t

19、hen prior to test they are cycled fifty times through the slope or movement for which they have been designed. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

20、 Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey

21、and the United Kingdom. BS EN 846-6:2012EN 846-6:2012 (E) 4 1 Scope This European Standard specifies a method for determining the tensile and compressive load capacity and load displacement characteristics of wall ties screwed, nailed, grouted or otherwise attached to frame elements or to inner leaf

22、 materials. The test is intended for ties for connecting masonry leaves to frame structures and to the inner leaves of cavity walls other than by embedding the inner connection in a mortar joint. 2 Normative references The following documents, in whole or in part, are normatively referenced in this

23、document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 300, Oriented Strand Boards (OSB) Definitions, classification and specifications EN 3

24、38, Structural timber Strength classes EN 771-1, Specification for masonry units Part 1: Clay masonry units EN 771-2, Specification for masonry units Part 2: Calcium silicate masonry units EN 771-3, Specification for masonry units Part 3: Aggregate concrete masonry units (Dense and lightweight aggre

25、gates) EN 771-4, Specification for masonry units Part 4: Autoclaved aerated concrete masonry units EN 771-5, Specification for masonry units Part 5: Manufactured stone masonry units EN 771-6, Specification for masonry units Part 6: Natural stone masonry units EN 772-1, Methods of test for masonry un

26、its Part 1: Determination of compressive strength EN 772-10, Methods of test for masonry units Part 10: Determination of moisture content of calcium silicate and autoclaved aerated concrete units EN 845-1, Specification for ancillary components for masonry Part 1: Ties, tension straps, hangers and b

27、rackets EN 206-1, Concrete Specification performance, production and conformity 3 Principle The tie is screwed, nailed, grouted or attached using other devices such as keys in slots, to a representative section of the frame element or inner leaf material using normal site techniques. The tie is then

28、 subjected to tension or compression until failure occurs. BS EN 846-6:2012EN 846-6:2012 (E) 5 4 Materials 4.1 Timber frame elements (studs) Timber sections shall be of coniferous timber as specified in accordance with strength class C24 of EN 338 and with a density of not greater than 600 kg/m and

29、a moisture content of 9 15 % by mass or as specified. 4.2 Timber frame sheathing Timber frame sheathing shall be of oriented strand board (OSB) in accordance with EN 300 or an acceptable structurally equivalent alternative material as specified and should be 400 mm 10 mm square and at least 8 mm thi

30、ck. 4.3 Metal frame or stud elements and concrete elements including lightweight aggregate concrete Representative sections of metal frame or stud elements or representative concrete samples shall be used as specified. 4.4 Masonry units 4.4.1 Sampling Masonry units shall be as specified in accordanc

31、e with EN 771. All of the masonry units for individual tests shall be taken from the same consignment. Masonry units shall be in an air dry condition, unless otherwise specified. 4.4.2 Testing Determine the compressive strength of a sample of masonry units using the method given in EN 772-1. Measure

32、 the moisture content by mass of AAC or calcium silicate units in accordance with EN 772-10. For other types of units, record the method of conditioning. Record the age of non-autoclaved concrete units at the time of testing the masonry specimens. 4.5 Screws, nails, grouts, plugs, slot sections or o

33、ther fixing ancillary items Fixing materials shall be in a clean dry uncontaminated state, either as supplied by the manufacturer or supplier for use with the tie system or as specified. 4.6 Sheathing nails Sheathing nails for timber frame sheathing shall be as specified. 4.7 Concrete for slot type

34、anchors Concrete shall comply with EN 206-1 and have a minimum compressive strength class of C 20/25 or as specified. BS EN 846-6:2012EN 846-6:2012 (E) 6 5 Apparatus 5.1 A simple support for the frame/wall element specimen such that the reactions are no closer to the tie than twice the depth of embe

35、dment or 100 mm whichever is the greater. The support system shall not apply any restraint against splitting or bowing of the specimen, apart from the friction generated at the reaction due to the applied load. For ties designed for large differential movements (e.g. timber frame ties) the clamp sys

36、tem shall allow a simulated vertical differential movement to be applied. (A typical arrangement is shown in Figure 1). 5.2 A clamp for gripping the free end of the tie and applying a tensile or compressive load. (Typical clamps are shown in Figure 2.) NOTE Clamping failures will invalidate the defo

37、rmation measurement and therefore specially designed clamps may be needed for particular tie forms. The use of low melting point alloys to act as chucks is recommended for complex pressing. Some frame ties will require special clamps to deal with the nailing/screwing tab. 5.3 A test machine capable

38、of applying the load without distortion such that the maximum load reading occurs above 20 % of the full scale reading. The load shall be measured using a load cell device having a digital or analogue readout with a maximum error of 2 % of the full scale reading. The system shall apply an axial forc

39、e to the specimen. The system or universal test machine shall be fitted with a rigid connection between the clamp which is used to apply tension or compression loads and the machine cross-head or loading device, i.e. any pivot ball joint or universal joint connections to the load cells shall be lock

40、ed. 5.4 A means of measuring the displacement of the specimen in relation to the clamp using at least two symmetrically placed dial gauges or electrical linear displacement transducers (as shown in Figure 1). Displacement shall be measured to the nearest 0,01 mm. 5.5 For polymer-based (plastic) prod

41、ucts only, a controlled temperature and humidity chamber or room which may be a chamber which fits over the specimen. 6 Preparation and storage of test specimens 6.1 General Ten specimens each for compression and tensile testing shall be prepared for testing at the declared minimum embedment length.

42、 The number of specimens for each shall be doubled where both ends of asymmetrical ties are tested separately. NOTE The fastening or tie should be installed approximately perpendicular to the face of the supporting material. Where the design of the tie precludes this, the manufacturers fixing instru

43、ctions should be followed. 6.2 Timber frame Cut or manufacture timber frame squares consisting of a piece of sheathing material fixed centrally to a length of stud by sheathing nails at 150 mm centres. None of the nails shall be closer to the centre of the stud than 20 mm. Fix ties to these timber f

44、rame squares using the fastenings provided with the ties and following the tie manufacturers instructions. Ties shall be located to within 10 mm of the centre of the timber frame square. (A typical specimen is shown in Figure 3.) BS EN 846-6:2012EN 846-6:2012 (E) 7 6.3 Other support materials Cut re

45、presentative sections of studs, rails, columns or walls such that the length is at least 215 mm. Fix ties or surface-mounted slot devices to them using the fastenings provided and using normal site practice or follow the tie manufacturers instructions. Ties shall be located to within 10 mm of the ce

46、ntre of the specimen. 6.4 Ties installed into cast in slots Install lengths of the slot section flush against one face of a wall mould of suitable dimensions using nails or proprietary clips. The slot should be a minimum of 150 mm from any edge of the wall and from any adjacent slot section. Fill th

47、e whole slot section with foam plastic or use some other reliable technique to exclude concrete and laitance during setting. The wall should be a minimum of 100 mm thick. Fill the mould with concrete complying with the specifications given in 4.7 using vibration to ensure good compaction. (Figure 4

48、shows a typical slot wall specimen.) 6.5 Masonry units Use either whole or part masonry units having at least one dimension of 215 mm or greater. Fix ties to them using the fastenings provided with the ties following the tie manufacturers instructions. Ties shall be located to within 10 mm of the ce

49、ntre of the unit. If the units are perforated or hollow, the ties shall be secured in the area of the perforated or hollow section. 6.6 Storage If fresh concrete or mortar are used take appropriate steps to prevent the test specimen from drying out during the first three days after construction, e.g. by covering it with a polyethylene sheet and then leave it uncovered in a laboratory environment until tested. 7 Procedure 7.1 Setting specimen in test machine a) Load the spe