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00560960 PDF BRITISH STANDARD BS EN 596 1995 Timber structures — Test methods — Soft body impact test of timber framed walls The European Standard EN 596 1995 has the status of a British Standard BS E[.]

BRITISH STANDARD Timber structures — Test methods — Soft body impact test of timber framed walls The European Standard EN 596:1995 has the status of a British Standard BS EN 596:1995 BS EN 596:1995 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/518/1, Structural timber, to Subcommittee B/518/1, Test methods, upon which the following bodies were represented: Department of the Environment (British Board of Agrément) Department of the Environment (Building Research Establishment) Institution of Civil Engineers Institution of Structural Engineers Timber Research and Development Association Wood Panel Products Federation Coopted members This British Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 October 1995 © BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference B/518/1 Draft for comment 91/18868 DC ISBN 580 24604 Amendments issued since publication Amd No Date Comments BS EN 596:1995 Contents Committees responsible National foreword Foreword Text of EN 596 © BSI 12-1999 Page Inside front cover ii i BS EN 596:1995 National foreword This British Standard has been prepared by Subcommittee B/518/1 and is the English language version of EN 596:1995 Timber structures — Test methods — Soft body impact test of timber framed walls published by the European Committee for Standardization (CEN) No existing British Standard is superseded A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 12-1999 EUROPEAN STANDARD EN 596 NORME EUROPÉENNE March 1995 EUROPÄISCHE NORM ICS 91.040.00 Descriptors: Timber construction, structural members, walls, timber frames, panels, impact tests, shock resistance English version Timber structures — Test methods — Soft body impact test of timber framed walls Structures en bois — Méthodes d’essai — Essai de corps mou sur murs ossature en bois Holzbauwerke — Prüfverfahren — Prüfung von Wänden in Holztafelbauart bei weichem Stoß This European Standard was approved by CEN on 1994-12-05 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 Central Secretariat 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 Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members Ref No EN 596:1995 E EN 596:1995 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 124, Timber structures, of which the secretariat is held by DS NOTE It is considered desirable to maintain the same clause numbers consistently throughout this series of standards Consequently, some clauses are void in this edition of this standard, but it is envisaged that future editions may need to include text in these clauses 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 September 1995, and conflicting national standards shall be withdrawn at the latest by September 1995 According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom Contents Foreword Scope Normative references Definitions Symbols Requirements Test method 6.1 Principle 6.2 Apparatus 6.3 Preparation of the test pieces 6.4 Procedure 6.5 Results 6.6 Test report Figure — Canvas bag Figure — Apparatus for testing soft body impact Page 3 3 3 3 3 4 © BSI 12-1999 EN 596:1995 Scope This standard specifies a test method for determining the resistance of a timber frame wall panel to impact from a soft body allowed to strike the sheathing of the panel Normative references None Definitions For the purposes of this standard, the following definition applies timber frame wall panel wall unit consisting of a timber and/or wood-based product framework, sheathed on at least one face with a wood-based or other sheet material A panel may be either structural or non-structural Symbols g h M W a acceleration due to gravity (in m/s2) drop height (in mm) mass of the impact load (in kg) impact energy (in J) angle of the support cable between the vertical position and the release position of the impact load (in °) Requirements The panels shall have the sheathing fixed to the loaded face of the panel, and the properties of the sheathing material shall be reported Any sheathing fixed to the unloaded face of the panel shall also be reported Test method 6.1 Principle The test method is used to assess the effect of impact energy on the panel The method deals with wall panels which are supported at top and bottom, but other relevant support conditions may be applicable, and if used shall be reported 6.2 Apparatus The following apparatus is required a) Coarse canvas bag containing a thin polyethylene bag of the same size which, when filled with hardened solid glass spheres each having a diameter of (3 ± 0,5) mm shall have a mass M of (50 ± 0,2) kg Figure shows the form of bag © BSI 12-1999 b) Arrangement whereby the bag is suspended by a rope in such a way that, while vertically at rest, the bag is just touching the panel surface at the point of impact The arrangement is shown in Figure c) Devices for: 1) hoisting; and 2) instantaneously releasing the bag d) Stiff test rig (consisting of a steel frame) with top and bottom beams simulating service conditions 6.3 Preparation of the test pieces The tests shall normally be carried out on wall panels which have been conditioned at the standard environment of (20 ± 2) °C and (65 ± 5) % relative humidity, but when other conditions apply, they shall be reported The test laboratory shall normally be maintained at the standard environment, but when other conditions apply, they shall be reported The moisture content of the wall panels shall be determined 6.4 Procedure The panel shall be erected vertically in the test rig In the erection process, the fixings of the panel in the rig shall be specified by the manufacturer or supplier Unless otherwise specified the point of impact shall be at the weakest part of the panel (1 500 ± 250) mm above the intended floor level Preliminary tests may be necessary to find the weakest part of the panel in this zone or the otherwise specified zone Before an impact load is applied, the bag shall be rolled to loosen the spheres The bag is placed at the impact point in such a way that, when it is suspended from the rope, it just touches the surface of the panel The bag shall then be drawn away from the panel surface such that the maximum angle to the vertical a subtended by the movement of the rope shall be not greater than 65° (see Figure 2) The bag shall be hoisted to the prescribed height of drop h measured vertically from the impact point The bag is then released and allowed to drop freely in an arc onto the face of the panel The moisture content of the frame and sheathing (if of a wood-based product) at the vicinity of the point of failure shall be determined EN 596:1995 NOTE The sidewall of the spheroconical bag is made of eight sections of coarse linen canvas (approximately 600 g/m2) sewn together NOTE The bottom of the bag is strengthened by a circular piece of leather of 120 mm diameter sewn into it NOTE The top of the bag is slightly truncated in order to make an opening of 80 mm diameter This opening is strengthened by a leather strip sewn into the bag, to which are fixed four equidistant rings held together by a suspension ring Figure — Canvas bag 6.5 Results After each drop, the panel shall be visually examined and any damage to the panel sheathing or framing shall be recorded The impact energy W (in J) shall be calculated from the following equation: Mh g W = 1000 The symbols are as given in clause 6.6 Test report The test report shall include the following information as relevant: a) sampling procedure; b) impact energy W, the number of drops and drop height, and the results of the visual examination as recorded in 6.5; c) number of panels tested; d) detailed description of the test panels; e) type and specification (or other quality designation) of materials used in the panels, with a note of any defects; f) types, surface finish and strength properties of the materials of the mechanical fasteners (including corrosion protection); g) dimensions of mechanical fasteners, shapes, quantity and positioning; h) description of the fixings of the panel to the test rig; i) type and position of any failure; j) moisture content of the framing members and sheathing at the time of failure; k) gap between the sheets in the panel (if any); l) direction of greater strength of the sheathing material © BSI 12-1999 EN 596:1995 Figure — Apparatus for testing soft body impact © BSI 12-1999 BS EN 596:1995 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or 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