BS EN 845-1 :201 3+A1 :201 In corpora tin g corrigen dum September 201 BSI Standards Publication Specification for ancillary components for masonry Part : Wall ties, tension straps, hangers and brackets BRITISH STANDARD B S E N 845 - : + A1 : National foreword This British Standard is the UK implementation of E N 845-1 : 01 +A1 : 01 I t su persed es B S E N 845-1 : 01 wh i ch i s wi th d wn Th e sta rt a n d fi n i sh o f te xt i n tro d u ce d o r a l te re d b y a m e n d m e n t i s i n d i ca te d i n th e te xt b y ta g s Ta g s i n d i ca ti n g ch a n g e s to CE N !" te xt ca rry th e n u m b e r o f th e CE N a m e n d m e n t F o r e xa m p l e , te xt a l te re d b y CE N a m e n d m e n t A1 E N 845 -1 i s i n d i ca te d b y sp e ci fi e s th e ch a cte ri sti cs a n d p e rfo rm a n ce re q u i re m e n ts fo r ti e s, j o i st h a n g e rs, stra p s a n d b cke ts a va i l a b l e th ro u g h o u t th e CE N m e m b e r co u n tri e s I t a i m s to d o so i n p ro d u ct p e rfo rm a n ce te rm s, a vo i d i n g a s fa r a s p o ssi b l e p re scri p ti ve re q u i re m e n ts a n d a l l th e tra d i ti o n a l d e si g n a ti o n s o f th e se p ro d u cts a va i l a b l e th ro u g h o u t E u ro p e E N 845 -1 i n cl u d e s cl a u se s co ve ri n g i n i ti a l typ e te sts, fa cto ry p ro d u cti o n co n tro l , sa m p l i n g fo r i n i ti a l typ e te sti n g a n d i n d e p e n d e n t te sti n g o f co n si g n m e n ts Th e se a re si m i l a r i n a l l m a so n ry p ro d u ct sp e ci fi ca ti o n s Th e U K N a ti o n a l An n e x N A a tta ch e d to th i s sta n d a rd p ro vi d e s a n i n fo rm a ti ve co m m e n ta ry o n th e u se o f B S E N 845 -1 i n th e U K N o th i n g i n th i s a n n e x sh o u l d b e co n stru e d a s sp e ci fyi n g re q u i re m e n ts o th e r th a n th o se co n ta i n e d i n th e n o rm a ti ve p a rts o f th i s E u ro p e a n S ta n d a rd I f CE m a rki n g i s p e rfo rm e d , th e p ro ce d u re s i n An n e x Z A wi l l a p p l y Th e si g n i fi ca n ce o f th e CE m a rki n g i s th a t th e p ro d u ct m a n u fa ctu re r cl a i m s co m p l i a n ce wi th th e “ h a rm o n i z e d ” re q u i re m e n ts g i ve n i n th e n o rm a ti ve te xt o f th e p ro d u ct sta n d a rd Th e se re l a te to th e b a si c re q u i re m e n ts fo r co n stru cti o n wo rks a s g i ve n i n th e Co n stru cti o n Pro d u cts Re g u l a ti o n N o t a l l p ro d u ct ch a cte ri sti cs n e e d n e ce ssa ri l y b e g i ve n o n th e CE m a rki n g , b u t th o se p ro d u ct ch a cte ri sti cs co ve re d b y re g u l a ti o n s i n fo rce i n e a ch E U M e m b e r S ta te , wh e re th e m a n u fa ctu rer i n ten d s th a t th e prod u ct wi l l be u sed , d o n eed to be sta ted The UK participation in its preparation was entrusted by Technical Committee B/51 9, Masonry and associated testing, to Subcommittee B/51 9/3, Ancillary components A l i st o f o rg a n i z a ti o n s re p re se n te d o n th i s su b co m m i tte e ca n b e o b ta i n e d o n re q u e st to i ts se cre ta ry Th i s p u b l i ca ti o n d o e s n o t p u rp o rt to i n cl u d e a l l th e n e ce ssa ry p ro vi si o n s o f a co n tra ct U se rs a re re sp o n si b l e fo r i ts co rre ct a p p l i ca ti o n © Th e B ri ti sh S ta n d a rd s I n sti tu ti o n Pu b l i sh e d b y B S I S ta n d a rd s Li m i te d I S B N 80 845 I CS ; Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 201 Amendments/corrigenda issued since publication Date Te xt a ffe cte d 30 September 201 Correction to supersession details 30 September 201 I m p l e m e n ta ti o n o f CE N a m e n d m e n t A1 : 01 N a ti o n a l fo re wo rd a n d N a ti o n a l An n e x N A u p d a te d EUROPEAN STANDARD EN 845-1:2013+A1 NORME EUROPÉENNE EUROPÄISCHE NORM July 2016 ICS 91.080.30 Supersedes EN 845-1:2013 English Version Specification for ancillary components for masonry - Part 1: Wall ties, tension straps, hangers and brackets Spécification pour composants accessoires de maỗonnerie - Partie 1: Attaches, brides de fixation, étriers de support et consoles Festlegungen für Ergänzungsbauteile für Mauerwerk Teil 1: Maueranker, Zugbänder, Auflager und Konsolen This European Standard was approved by CEN on 21 March 2013 and includes Amendment approved by CEN on 23 April 2016 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 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 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, 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 and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I TÉ E URO PÉ E N D E N O RM ALI S ATI O N E URO PÄI S C H E S KO M I T E E FÜR N O RM UN G CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 845-1:2013+A1:2016 E BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) Contents Page European foreword Scope Normative references 3.1 3.2 Terms, definitions and symbols Terms and definitions Symbols 10 4.1 4.2 Materials 26 General 26 Fixings and materials not supplied by the manufacturer 26 5.1 5.2 5.2.1 5.2.2 Requirements 27 General 27 Dimensions and limit deviations 27 Method of measurement and accuracy 27 Length, applicable cavity width, embedment and fixings (number, size and location) 27 5.2.3 Thickness or diameter 28 5.2.4 Other information 28 5.3 Mechanical strength 29 5.3.1 Wall ties and associated fixings 29 5.3.2 Joist hangers 31 5.3.3 Brackets 32 5.3.4 Tension straps 33 5.4 Resistance to water crossing a cavity 33 5.5 Safety during installation 34 5.6 Durability 34 5.7 Dangerous substances 34 Description and designation 34 Marking 36 8.1 8.2 8.2.1 8.2.2 8.2.3 8.2.4 8.3 8.3.1 8.3.2 8.3.3 8.3.4 Assessment and verification of constancy of performance – AVCP 36 General 36 Type testing 36 General 36 Test samples, testing and compliance criteria 37 Test reports 38 Shared other party results 38 Factory production control (FPC) 38 General 38 Requirements 39 Product specific requirements 41 Procedure for modifications 42 Annex A (normative) Materials and protective coatings 43 Annex B (informative) Guidance on FPC frequencies 48 BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) ! Annexprovisions ZA" Clauses of this European Standard addressing the of the EU Construction Products Regulation 50 (informative) ZA.1 Scope and relevant characteristics 50 ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) 57 ZA.3 Assignment of AVCP tasks 57 Bibliography 60 BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) European foreword This document (EN 845-1:2013+A1:2016) 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 January 2017, and conflicting national standards shall be withdrawn at the latest by April 2018 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 includes Amendment approved by CEN on 2016-04-23 This document supersedes ! EN 845-1:2013" !" The start and finish of text introduced or altered by amendment is indicated in the text by tags This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s) For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document ! deleted text" EN 845, Specification for ancillary components for masonry, consists of the following parts: — Part : Wall ties, tension straps, hangers and brackets — Part 2: Lintels — Part 3: Bed joint reinforcement of steel meshwork According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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 and the United Kingdom BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) Scope This European Standard specifies requirements for wall ties, tension straps, hangers and brackets for interconnecting masonry and for connecting masonry to other parts of works and buildings including walls, floors, beams, and columns Where anchors or fasteners are supplied or specified as part of an ancillary component, the requirements including performance requirements apply to the complete product This European Standard is not applicable to: a) anchors and fasteners other than as part of an ancillary component; b) shelf angles; c) wall starter plates for tying into existing walls; d) products formed from materials other than: 1) austenitic stainless steel (molybdenum chrome nickel alloys or chrome nickel alloys); 2) austenitic ferritic stainless steel; 3) ferritic stainless steel; 4) copper; 5) phosphor bronze; 6) aluminium bronze; 7) zinc-coated-steel with or without organic coating; 8) polypropylene; 9) polyamide (for expansion plugs only) NOTE The resistance to fire performance of the products included herein cannot be assessed separately from the masonry element of which they are part and is therefore not covered under the scope of this part of this European Standard Normative references The following documents, in whole or in part, are normatively referenced in this 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 771 (all parts), Specification for masonry units EN 846-2, Methods of test for ancillary components for masonry — Part 2: Determination of bond strength of prefabricated bed joint reinforcement in mortar joints EN 846-3, Methods of test for ancillary components for masonry — Part 3: Determination of shear load capacity of welds in prefabricated bed joint reinforcement BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) EN 846-4, Methods of test for ancillary components for masonry — Part 4: Determination of load capacity and load-deflection characteristics of straps EN 846-5, Methods of test for ancillary components for masonry — Part 5: Determination of tensile and compressive load capacity and load displacement characteristics of wall ties (couplet test) EN 846-6, Methods of test for ancillary components for masonry — Part 6: Determination of tensile and compressive load capacity and load displacement characteristics of wall ties (single end test) EN 846-7, Methods of test for ancillary components for masonry — Part 7: Determination of shear load capacity and load displacement characteristics of shear ties and slip ties (couplet test for mortar joint connections) EN 846-8, Methods of test for ancillary components for masonry — Part 8: Determination of load capacity and load-deflection characteristics of joist hangers EN 846-9, Methods of test for ancillary components for masonry — Part 9: Determination of flexural resistance and shear resistance of lintels EN 846-10, Methods of test for ancillary components for masonry — Part 10: Determination of load capacity and load deflection characteristics of brackets EN 846-11, Methods of test for ancillary components for masonry — Part 11 : Determination of dimensions and bow of lintels EN 846-13:2001, Methods of test for ancillary components for masonry — Part 3: Determination of resistance to impact, abrasion and corrosion of organic coatings EN 846-14, Methods of test for ancillary components for masonry — Part 4: Determination of the initial shear strength between the prefabricated part of a composite lintel and the masonry above it EN 998-2, Specification for mortar for masonry — Part 2: Masonry mortar EN 10020, Definitions and classification of grades of steel EN 10029, Hot-rolled steel plates mm thick or above — Tolerances on dimensions and shape EN 10088 (all parts), Stainless steels EN 10143, Continuously hot-dip coated steel sheet and strip — Tolerances on dimensions and shape EN 10244 (all parts), Steel wire and wire products — Non-ferrous metallic coatings on steel wire EN 10245-1, Steel wire and wire products — Organic coatings on steel wire — Part : General rules EN 10245-2, Steel wire and wire products — Organic coatings on steel wire — Part 2: PVC finished wire BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) EN 10245-3, Steel wire and wire products — Organic coatings on steel wire — Part 3: PE coated wire EN 10346, Continuously hot-dip coated steel flat products — Technical delivery conditions EN ISO 75 (all parts), Plastics — Determination of temperature of deflection under load EN ISO 178, Plastics — Determination of flexural properties (ISO 78) EN ISO 180:2000, Plastics — Determination of Izod impact strength (ISO 80:2000) EN ISO 306, Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST) (ISO 306) EN ISO 527 (all parts), Plastics — Determination of tensile properties EN ISO 1133 (all parts), Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics EN ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods (ISO 1461 ) EN ISO 1463, Metallic and oxide coatings — Measurement of coating thickness — Microscopical method (ISO 463) EN ISO 2039-2, Plastics — Determination of hardness — Part 2: Rockwell hardness (ISO 2039-2) ISO 427, Wrought copper-tin alloys — Chemical composition and forms of wrought products ISO 428, Wrought copper-aluminium alloys — Chemical composition and forms of wrought products ISO 431, Copper refinery shapes ISO 1183 (all parts), Plastics — Methods for determining the density of non-cellular plastics Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply NOTE Dimensions and terms relating to wall ties are given in Figure 3.1.1 asymmetrical tie 1) wall tie which is of a different physical design at either end over its embedment depth (or end fixing) and for which the centre section may be symmetrical or asymmetrical in detail Note to entry: Examples are given in Figure a) 2) wall tie which is physically identical at either end over its embedment depth (or end fixing) but which is fixed in a different manner at each end is also defined as asymmetrical for the purposes of the test procedure BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) Note to entry: Examples are given in Figure b) 3.1.2 bracket device attached to structural elements, comprising an individual support for two adjacent masonry units, which form part of a masonry wall Note to entry: Examples are given in Figure 3.1.3 cavity wall tie device for connecting a masonry leaf across a cavity to another masonry leaf or to a structural frame to resist tension and compression forces while allowing limited differential movement in the plane of the wall Note to entry: Examples are given in Figure and Figure Note to entry: Wall ties are further sub classified as asymmetrical or symmetrical and as horizontal, slope-tolerant or movement-tolerant Examples are given in Figures , and respectively 3.1.4 cavity width distance between the cavity faces of the masonry leaves of a cavity wall, measured perpendicular to the plane of the wall 3.1.5 declared value value for a product property, determined in accordance with this standard, that a manufacturer is confident of achieving bearing in mind the variability of the manufacturing process 3.1.6 minimum embedment length minimum length to achieve the declared value of a wall tie, or hanger designed to be embedded in mortar Note to entry: The specification for the length to be built into the wall should be greater than the minimum used by the manufacturer for the declaration, so as to allow for tolerances in positioning on site (see Figure 1) 3.1.7 fixing device (e.g a nail, screw, screw/plug, anchor or bolt) used to connect ancillary components to masonry or to supporting structures to resist tension and shear forces 3.1.8 horizontal wall tie cavity wall tie which is designed to be installed approximately horizontally and in the plane of the mortar joint across a cavity Note to entry: Examples are given in Figure and Figure 3.1.9 joist hanger (face fixing type) device for supporting a joist, beam, truss or rafter on a masonry wall via fixing bolts or screws BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) The mechanical strength of the products is dependent on their dimensions, minimum embedment as relevant and fixings a Displacement control for the product type is addressed through a declared displacement at one third of the declared value of the mean load capacity b Durability of performance characteristics against corrosion is dependent on both the condition of exposure of the masonry and the material/coating specification The harmonised standard follows the state of the art by giving material/coating specifications for use with EN 1996-2 or regulatory requirements c Table ZA.1.2 — Relevant clauses for shear ties and intended use Product: Shear ties Intended use: In masonry walls and partitions as covered by the scope of this standard (for connecting two adjacent masonry leaves together, for connecting masonry walls which need to interact to produce composite action and for connecting masonry walls to frame structures) Essential Characteristics Compressive strength Requirement clauses of this European Standard 5.3.1.3.2 Classes and/or threshold levels None Notes Compressive load capacity in N, for ties with: a - overall length in mm - minimum embedment length in mm (for one or both ends as relevant) - minimum mortar joint thickness in mm - minimum masonry unit strength and mortar strength when relevant - requirements for fixing devices and for strength/characteristics of the base material when relevant (if mechanically fixed) - reference to installation instructions when needed Failure mode Tensile strength 5.3.1.3.1 None Tensile load capacity in N for ties with notes described above concerning compression strength a Failure mode Buckling stiffness or Shear strength bending 5.3.1.3.4 None Displacement in mm a, b 5.3.1.3.3 None Shear load capacity in N for ties with notes described above concerning compression strength a, b Failure mode Water capability Durability performance 52 shedding Not relevant of 5.6 Durability None Material/coating reference c and steel grade when relevant to product type BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) characteristics corrosion) (against Dangerous substances 5.7 None The mechanical strength of the products is dependent on their dimensions, minimum embedment as relevant and fixings a Displacement control for the product type is addressed through a declared displacement at one third of the declared value of the mean load capacity b Durability of performance characteristics against corrosion is dependent on both the condition of exposure of the masonry and the material/coating specification The harmonised standard follows the state of the art by giving material/coating specifications for use with EN 1996-2 or regulatory requirements c Table ZA.1.3 — Relevant clauses for slip ties and intended use Product: Slip ties Intended use: In masonry walls and partitions as covered by the scope of this standard (for connecting two adjacent walls or for connecting masonry cladding to frame structures while allowing in-plane movement) Essential Characteristics Requirement clauses of this European Classes Standard and/or threshold levels Shear strength stiffness and Slip ties (general purpose) 5.3.1.4.2 Shear load capacity None Notes Shear load capacity in N, for ties with: a, b 5.3.1.4.3 Displacement under load - overall length in mm - cavity width, range in mm minimum embedment length in mm (for one or both ends as relevant) - minimum mortar thickness in mm j oint - minimum masonry unit strength and mortar strength when relevant - requirements for fixing devices and for strength/characteristics of the base material when relevant (if mechanically fixed) maximum permissible range of movement in mm when relevant - reference to installation instructions when needed Failure mode Durability of 5.6 Durability Material/coating reference 53 c BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) performance characteristics (against corrosion) Dangerous substances and steel grade when relevant to product type 5.7 None The mechanical strength of the products is dependent on their dimensions, minimum embedment as relevant and fixings a Displacement control for the product type is addressed through a declared displacement at one third of the declared value of the mean load capacity b Durability of performance characteristics against corrosion is dependent on both the condition of exposure of the masonry and the material/coating specification The harmonised standard follows the state of the art by giving material/coating specifications for use with EN 1996-2 or regulatory requirements c Table ZA.1.4 — Relevant clauses for tension straps and intended Product: Tension straps Intended use: In masonry walls and partitions as covered by the scope of this standard (for connecting masonry walls to adjacent components such as floors and roofs) Essential Characteristics Tensile strength Requirement clauses of this European Standard 5.3.4.2 Tension straps – tensile load capacity Classes and/or threshold levels None Notes Tensile load capacity as a mean value and if required as a characteristic value in N, for straps with: a - overall dimensions of each strap length in mm - minimum built-in length in mortar joint in mm when relevant - minimum mortar joint thickness in mm when relevant precompression corresponding to declared tensile load capacity for horizontal straps - minimum masonry unit strength and mortar strength when relevant - requirements for fixings/ anchorage and for strength/characteristics of the base materials when relevant (if mechanically fixed) - reference to installation instructions when needed Failure mode Displacement under load 54 5.3.4.3 tension straps – displacement under None load Displacement in mm a, b BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) Durability of 5.6 Durability performance characteristics (against corrosion) Dangerous substances 5.7 Material/coating reference c and steel grade when relevant to product type None The mechanical strength of the products is dependent on their dimensions, minimum built-in length/anchorage and fixings a Displacement control for the product type is addressed through a declared displacement at one third of the declared value of the mean load capacity b Durability of performance characteristics against corrosion is dependent on both the condition of exposure of the masonry and the material/coating specification The harmonised standard follows the state of the art by giving material/coating specifications for use with EN 1996-2 or regulatory requirements c Table ZA.1.5 — Relevant clauses for joist hangers and intended use Product: Joist hangers Intended use: In masonry walls and partitions as covered by the scope of this standard (for supporting joists, beams or rafters on a masonry wall) Essential Characteristics Requirement clauses of this European Standards Load bearing capacity 5.3.2.2 Joist hangers – Vertical load capacity Classes and/or threshold levels None Notes Load bearing capacity as mean value and if required as a characteristic value in N, for hangers with: a - applicable joist width - clear length of masonry flange and j oist flange when relevant - distance between masonry flange and bearing surface of joist flange when relevant - minimum embedment length in mortar j oint or bearing length in mm when relevant - clear length of joist flange in mm - minimum mortar j oint thickness in mm when relevant - minimum masonry unit strength and mortar strength when relevant requirements for fixings/anchorage and for strength/characteristics of the base materials when relevant (if mechanically fixed) 55 BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) - reference to installation instructions when needed Failure mode Deflection under load 5.3.2.3 Joist hangers deflection under load None Deflection in mm a, b Durability of 5.6 Durability performance characteristics (against corrosion) Dangerous substances 5.7 Material/coating reference c and steel grade when relevant to product type None The mechanical strength of the products is dependent on their dimensions, minimum embedment length/anchorage and fixings a Deflection control for the product type is addressed through a declared deflection at one third of the declared value of the mean load capacity b Durability of performance characteristics against corrosion is dependent on both the condition of exposure of the masonry and the material/coating specification The harmonised standard follows the state of the art by giving material/coating specifications for use with EN 1996-2 or regulatory requirements c Table ZA.1.6 — Relevant clauses for brackets and intended use Product: Brackets Intended use: In masonry walls and partitions as covered by the scope of this standard (for attaching to a structural member for the support of two masonry units) Essential Characteristics Requirement clauses of this European Standards Load bearing capacity 5.3.3.2 Brackets – Vertical load capacity Regulatory class(es) None Notes Load bearing capacity as a mean value and if required as a characteristic value in N, for brackets with: a - overall length bracket from fixing surface to support flange extremity in mm - minimum thickness of material comprising bracket in mm - minimum masonry unit strength and mortar strength when relevant requirements for fixings/anchorage and for strength/characteristics of the base materials when relevant (if mechanically fixed) - reference to installation instructions when needed Failure mode Deflection under load Durability performance 56 5.3.3.3 Brackets – Deflection under load of 5.6 Durability None Deflection in mm a, b Material/coating reference c and steel grade when relevant BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) characteristics (against corrosion) Dangerous substances a to product type 5.7 None The mechanical strength of the products is dependent on their dimensions, anchorage method and fixings Deflection control for the product type is addressed through a declared displacement at one third of the declared value of the mean load capacity b Durability of performance characteristics against corrosion is dependent on both the condition of exposure of the masonry and the material/coating specification The harmonised standard follows the state of the art by giving material/coating specifications to suit c ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) The AVCP system(s) of wall ties, tension straps, hangers and brackets indicated in Table(s) ZA.1 can be found in the EC legal act(s) adopted by the EC: Directive 89/106/EEC (CPD) Annex III.2.(ii), Second possibility Micro-enterprises are allowed to treat products under AVCP system covered by this standard in accordance with AVCP system 4, applying this simplified procedure with its conditions, as foreseen in Article 37 of Regulation (EU) No.305/2011 ZA.3 Assignment of AVCP tasks The AVCP of wall ties, tension straps, hangers and brackets as provided in Table(s) ZA.1 is defined in Table(s) ZA.2 resulting from application of the clauses of this or other European Standards indicated therein The content of the tasks assigned to the notified body shall be limited to those essential characteristics, if any, as provided for in Annex III of the relevant standardization request and to those that the manufacturer intends to declare Taking into account the AVCP systems defined for the products and the intended uses the following tasks are to be undertaken by the manufacturer and the notified body respectively for the assessment and verification of the constancy of performance of the product 57 BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) Table ZA.2.1 — Assignment of AVCP tasks for wall ties (cavity wall ties, shear ties and slip ties) Tasks Content of the task AVCP clauses to apply Tasks for the Factory production control Parameters related to all 8.3 and Annex B manufacturer (FPC) characteristics of Table ZA.1.1 to Table ZA.1.3 Tasks for notified laboratory a Compressive strength (for cavity wall and shear ties) (see 5.3.1.2 and 5.3.1.3) The notified laboratory shall assess the performance on the basis of testing (based on sampling carried out by the manufacturer), calculation, tabulated values or descriptive documentation of the construction product Tensile strength (for cavity wall and shear ties) (see 5.3.1.2 and 5.3.1.3) Buckling or bending stiffness (for cavity wall ties) (see 5.3.1.2) Shear strength or stiffness (for shear ties) - (see 5.3.1.3) Shear strength or stiffness 8.2 (for slip ties) - (see 5.3.1.4 and 5.3.1.5) Table ZA.2.2 — Assignment of evaluation of AVCP tasks for tension straps Tasks Content of the task AVCP clauses to apply Tasks for the Factory production control Parameters related to all 8.3 and Annex B manufacturer (FPC) characteristics of Table ZA.1.4 Tasks for notified laboratory 58 a The notified laboratory shall Tensile strength (see 5.3.4.2) 8.2 assess the performance on Displacement under load the basis of testing (based on (see 5.3.4.3) sampling carried out by the manufacturer), calculation, tabulated values or descriptive documentation of the construction product BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) Table ZA.2.3 — Assignment of evaluation of AVCP tasks for joist hangers Tasks Content of the task AVCP clauses to apply Tasks for the Factory production control Parameters related to all 8.3 and Annex B manufacturer (FPC) characteristics of Table ZA.1.5 Tasks for notified laboratory a The notified laboratory shall assess the performance on the basis of testing (based on sampling carried out by the manufacturer), calculation, tabulated values or descriptive documentation of the construction product Load bearing (see 5.3.2.2) Deflection (see 5.3.2.3) capacity 8.2 under load Table ZA.2.4 — Assignment of evaluation of AVCP tasks for brackets Tasks Content of the task AVCP clauses to apply Tasks for the Factory production control Parameters related to essential 8.3 and Annex B manufacturer (FPC) characteristics of Table ZA.1.6 relevant for the intended use which are declared Tasks for notified laboratory " a The notified laboratory shall assess the performance on the basis of testing (based on sampling carried out by the manufacturer), calculation, tabulated values or descriptive documentation of the construction product Load bearing (see 5.3.3.2) Deflection (see 5.3.3.3) under capacity 8.2 load 59 BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) Bibliography [1] EN 1996-2, Eurocode — Design of masonry structures — Part 2: Design considerations, selection of materials and execution of masonry [2] EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025) 60 BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) National Annex NA (informative) Additional information for the use of EN 845-1 in the UK NA.1 General Guidance on the use of wall ties, tension straps, hangers and brackets is given in, but not limited to, EN 996-1 -1 , EN 996-2, and PD 6697 Designs, which specify wall ties, tension straps, hangers and brackets in accordance with EN 845-1 , should state the required performance characteristics NA.2 Scope EN 845-1 covers wall ties, tension straps, hangers and brackets made from speci f ed materials that can provide adequate mechanical performance and durability NA.3 Fixings for ancillary components (see BS EN 845-1 , 4.2) EN 845-1 requires f xings to be either supplied with the component or speci f ed by the manufacturer The declared performance of the ancillary components is dependent on the use of the required f xings in the declared combination of masonry units, mortar and f xings NA.4 Dimensions and limit deviations (see BS EN 845-1 , 5.2) NA.4.1 General EN 845-1 speci f es the dimensions to be declared and the corresponding limit deviations NA.4.2 Minimum embedment length of wall ties For wall ties that are intended to be embedded in mortar joints, EN 845-1 requires the minimum embedment length to be declared The minimum embedment length is used in tests to determine the mechanical performance of the ties The actual embedment length used in a construction will need to be no less than the declared minimum embedment length A minimum embedment length of 50 mm has been standard practice in UK execution works, but it is currently the practice for ties to be supplied with a minimum embedment length of 62.5mm and this should be taken into account in design speci f cations When selecting the overall length of ties, the minimum embedment length will need to be considered NA.5 Mechanical strength (see BS EN 845-1 , 5.3) NA.5.1 General EN 845-1 requires the load capacity of the products covered to be declared in terms of compression, tension and shear, as appropriate to their function 61 BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) A m ea n as va l u e o f th e l o a d ti m e s th e m ea n ca p a ci ty h a s to b e d e cl a re d , va l u e Wh e re wa l l ti e s a ct bu t a to g e th e r, ch a cte ri sti c va l u e m a y a l so b e d e cl a re d th e d e si g n stre n g th may be o b ta i n e d d i vi d i n g th e d e cl a re d m e a n va l u e o f l o a d ca p a ci ty b y th e a p p ro p ri a te m a te ri a l p a rti a l sa fe ty fa cto r, Va l u e s o f E N 845 -1 sh a l l M by M wi l l b e fo u n d i n th e N A to E N 9 -1 -1 re q u i re s th a t th e d i sp l a ce m e n t u n d e r l o a d a t o n e th i rd o f th e d e cl a re d va l u e o f l o a d ca p a ci ty b e d e cl a re d Wh e re a l o we r d i sp l a ce m e n t va l u e th a n th a t d e cl a re d i s re q u i re d , a p ro d u ct wi th a l o a d ca p a ci ty g re a te r th a n th a t re q u i re d fo r stre n g th a l o n e wi l l n e e d to b e ch o se n NA.5.2 Wall ties Wa l l ti e s cl a ssi f in th e UK a re cl a ssi f ed by en d u se fo r co n ve n i e n ce of se l e cti o n and a p p l i ca ti o n S u ch ca ti o n e n a b l e s ti e s, m e e ti n g a co m b i n a ti o n o f p e rfo rm a n ce cri te ri a , to b e re fe re n ce d m o re e a si l y i n d e si g n g u i d a n ce , d e si g n sp e ci cri te ri a fo r th e e n d u se cl a ssi f f ca ti o n s a n d e xe cu ti o n i n stru cti o n s Th e typ e re fe re n ce s a n d q u a l i fyi n g ca ti o n o f wa l l ti e s wi l l b e fo u n d in PD 6697 Th e typ e re fe re n ce s we re d e ve l o p e d fo r ti e s wh e re th e d e cl a re d d i sp l a ce m e n t a t o n e th i rd o f th e d e cl a re d l o a d ca p a ci ty wa s n o t m o re th a n m m NA.5.3 Tension straps To p ro vi d e an e q u i va l e n t co m m o n l y u se d in th e U K, p e rfo rm a n ce te n si o n to th e stra p s sh o u l d p re scri p ti ve h a ve a 30 mm d e cl a re d × mm te n si l e l o a d l a te l re stra i n t stra p s, ca p a ci ty o f n o l e ss th a n kN a n d a d i sp l a ce m e n t o f n o m o re th a n m m NA.5.4 Joist hangers EN 845 -1 ca n be J o i st de f re q u i re s ca rri e d h a n g e rs e cti o n b e e n sp e ci u se d u n d er f m e ch a n i ca l a t fa i l u re in l oa d p e rfo rm a n ce b a se d th e n ot UK on in te sts, to and a cco rd a n ce e xce e d i n g 2mm be d e cl a re d in a d d i ti o n a l l y th e wi th Co d e of te rm s de f Pra cti ce Co n ve n ti o n a l l y, in o f th e e cti o n UK ve rti ca l l oa d u n d er l oa d G u i d a n ce p cti ce , sh o u l d sa fe ca p a ci ty th a t i s to b e d e cl a re d e xh i b i t wo rki n g a m ea n l oa d s h a ve e d fo r j o i st h a n g e rs fo r b u i l d i n g i n to m a so n ry wa l l s a n d o th e r fo rm s o f wa l l co n stru cti o n o f m a i n l y d o m e sti c d we l l i n g s a n d th e se ca n b e d e ri ve d b y d i vi d i n g th e m e a n va l u e o f th e d e cl a re d ve rti ca l l o a d ca p a ci ty b y a n e ffe cti ve g l o b a l and m a te ri a l stre n g th u p o n th e m m d e ca p a ci ty b y th e f sa fe ty fa cto r (th i s e ffe cti ve g l o b a l co m p o n e n ts) If th e d e cl a re d ve rti ca l l oa d sa fe ty fa cto r i n cl u d e s b o th l o a d ca p a ci ty has been ca l cu l a te d b a se d e cti o n l i m i t, th e sa fe wo rki n g l o a d i s o b ta i n e d b y d i vi d i n g th e d e cl a re d ve rti ca l l o a d g l oba l sa fe ty fa cto r o f I f i t h a s been ca l cu l a te d b a se d u pon th e fa i l u re l oa d th e sa fe wo rki n g l o a d i s o b ta i n e d b y d i vi d i n g th e m e a n d e cl a re d ve rti ca l l o a d ca p a ci ty b y th e g l o b a l sa fe ty fa cto r o f Th e m i n i m u m d e cl a re d va l u e s o f ve rti ca l l o a d ca p a ci ty fo r j o i st h a n g e rs fo r u se i n re si d e n ti a l co n stru cti o n to su p p o rt so l i d ti m b e r j o i sts o f ce rta i n si z e s a re g i ve n i n Ta b l e N A Table NA.1 — Minimum declared values of vertical load capacity for joist hangers for use in residential construction to support solid timber joists of certain sizes 62 Joist width mm Joist depth mm Minimum declared value of vertical load capacity kN 38 75 38 225 3.7 50 75 3.2 50 225 63 50 63 225 4 75 50 3.1 75 225 BS EN 845-1:2013+A1:2016 EN 845-1:2013+A1:2016 (E) NA.6 Resistance to water crossing a cavity (see BS EN 845-1 , 5.4) EN 845-1 requires a declaration to be made as to whether or not cavity wall ties are “resistant” or “not resistant” to water crossing the cavity NA.7 Durability (see BS EN 845-1 , 5.6) EN 845-1 , Annex A requires a material/coating reference to be declared from a list of materials and corrosion protection systems Guidance on the choice of materials and corrosion protection systems, which closely match those used in current UK practice, will be found in PD 6697 Other design and execution guidance can also be found in EN 996-2 NA.8 Resistance to f re Wall ties, tension straps, hangers and brackets can form a part of f re-resisting masonry elements, but not themselves necessarily form f re-resisting components EN 845-1 does not require any declaration in respect of the resistance to f re of the individual ancillary products Unless constructions have been tested, ancillary components and f xings, which contain materials that readily soften or are easily combustible at elevated temperatures, will need to be avoided in f re-resisting elements NA.9 Assessment of load on wall ties, tension 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