1、CEN ENx59b 95 m 3404589 OLOb9Lb T 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 CEN ENr.596 95 3404589 0106917 903 Amd. No. Date BS EN 696 : 1995 Rxt affected
2、This British Standard, having been prepared under the direction of the Sector Board for Buding and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 October 1995 O BSI 1995 The foliowing BSI references relate to the work on this standard: Committ
3、ee reference B/518/1 Draft for comment 91/18868 DC ISBN0680246043 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, Rst methods, upon which the following bodies were repr
4、esented: Department of the Environment (British Board of Agrment) 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 CEN ENx5b 95
5、 m 3404589 OLObL 84T m BS EN 596 : 1995 Contents page Committees responsible Inside front cover National foreword ii Foreword 2 lxt of EN 596 3 1 CEN ENs596 95 I 3404589 0106919 i86 BS EN 596 : 1995 National foreword This British Standard has been prepared by Subcommittee B/518/1 and is the English
6、language version of EN 596 : 1995 Pimberstmtures - lkst mdhods - Soft body impact test of timber framed walls published by the European Committee for Standardization (CEN). No existing British Standard is superseded. Compliance with a British Standard does not of itself confer immunity from legai ob
7、iigations. CEN EN*596 95 3404589 0306920 LiT8 = EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 596 March 1995 ICs 91.040.00 Descriptors: Timber construction, structural members, walls, timber frames, panels, impact tests, shock resistance English version Timber structures - Tkst methods - Soft
8、 body impact test of timber framed walls Structures en bois - Mthodes dessai - Essai de corps mou sur murs ossature en bois weichem StoB Holzbauwerke - Prfverfahren - Prfung von Wanden in Holztafelbauart bei This European Standard was approved by CEN on 1994-12-05. CEN members are bound to comply wi
9、th the CENKENELEC 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 Secretari
10、at 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
11、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 Comit Europen de Norma
12、lisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 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 CEN EN*57b 75 m 3404587 010b72L 334 m Page 2 EN
13、 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 cl
14、auses 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?
15、 and conflicting national standards shall be withdrawn at the latest by September 1995. According to the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxem
16、bourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Foreword 1 Scope 2 Normative references 3 Definitions 4 Symbols 5 Requirements 6 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 page 2 3
17、 3 3 3 3 3 3 3 3 3 6 6 CEN ENx596 95 3404589 0306922 270 = 1 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. 2 Normative references None. 3 Definitions For the purposes of
18、 this standard, the following definition applies. timber frame wali 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. 4 Symbols g h drop height (in m
19、m) M W impact energy (in J) a acceleration due to gravity (in m/s2) mass of the impact load (in kg) angle of the support cable between the vertical position and the release position of the impact load (in O) 5 Requirements The panels shall have the sheathing fixed to the loaded face of the panel, an
20、d the properties of the sheathing material shall be reported. Any sheathing fixed to the unloaded face of the panel shall also be reported. 6 ast 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
21、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 diame
22、ter of (3 f 0,s) mm shall have a mass Mof (50 f 0,2) kg. Figure 1 shows the form of bag. Page 3 EN 596 : 1995 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 show
23、n in figure 2. 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 con
24、ditioned at the standard environment of (20 f 2) OC and (65 f 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 o
25、f 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
26、the panel (1500 f 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 s
27、uch 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 hois
28、ted 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 de
29、termined. CEN EN*59b 95 3404589 0306923 307 Page 4 EN 596 : 1995 -A Sizes in miiiimetres NOTE 1. The sidewall of the spheroconical bag is made of eight sections of coarse linen canvas (approximately 600 m2) sewn together. NOTE 2. The bottom of the bag is strengthened by a circular piece of leather o
30、f 120 mm diameter sewn into it. NOTE 3. 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 Mgs held together by a suspension ring. Figure 1. Canvas bag CEN EN*5
31、9b 95 I 3404589 0306924 043 = Page 5 EN 596 : 1995 Floor level Sizes in miiimetres Figure 2. Apparatus for testing soft body impact CEN EN*59b 95 m 3404589 OLOb925 T8T m Page 6 EN 696 : 1996 6.5 Results After each drop, the panel shall be visually examined and any damage to the panel sheathing or fr
32、aming shall be recorded. The impact energy W(in J) shall be calculated from the following equation: w=- Mhg 1000 The symbols are as given in clause 4. 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 a
33、nd 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 str
34、ength 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
35、 members and sheathing at the time of failure; k) gap between the sheets in the panel (if any); 1) direction of greater strength of the sheathing material. BS EN 596 : 1995 CEN EN*59b 95 3404589 01Ob926 916 BSI 389 Chiswick High Road London W4 4AL 9510-5-1.5k-FP BSI - British Standards Institution B
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