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1、BRITISH STANDARD BS EN 385:2001 Finger jointed structural timber Performance requirements and minimum production requirements The European Standard EN 385:2001 has the status of a British Standard ICS 79.040; 91.080.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed C
2、opy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 385:2001 This British Standard, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standar
3、ds Policy and Strategy Committee on 18 March 2002 BSI 18 March 2002 ISBN 0 580 39276 7 National foreword This British Standard is the official English language version of EN 385:2001. It supersedes BS EN 385:1995 which is withdrawn. The UK participation in its preparation was entrusted to Technical
4、Committee B/518, Structural timber, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be fo
5、und in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standar
6、ds are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep t
7、he UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 16, and an inside back cover and a back cover. The BSI copyright date displaye
8、d in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 385 October 2001 I
9、CS 79.040Supersedes EN 385:1995 English version Finger jointed structural timber - Performance requirements and minimum production requirements Aboutages entures multiples dans les bois de construction - Exigences de performance et exigences minimales de fabrication Keilzinkenverbindungen im Bauholz
10、 - Leistungsanforderungen und Mindestanforderungen an die Herstellung This European Standard was approved by CEN on 3 September 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 st
11、andard 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 l
12、anguage 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,
13、 Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploi
14、tation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 385:2001 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 385:2001 (E) 2 Contents page Foreword3 Introduction.4 1Scope4 2Normative references4 3
15、Terms and definitions .4 4Symbols6 5Requirements.6 5.1General6 5.2Timber.7 5.2.1Species .7 5.2.2Knots and fissures 7 5.2.3Wane or edge damage .7 5.3Adhesives8 5.4Bending strength.9 6Manufacturing requirements9 6.1Production conditions9 6.2Timber.9 6.3Adhesive application .9 6.3.1Adhesive application
16、 by machine .9 6.3.2Manual adhesive application 10 6.4Assembly and end pressure10 6.4.1Assembly 10 6.4.2End pressure.10 7Quality control11 7.1Factory production control.11 7.1.1General .11 7.1.2Sampling of finger joints .11 7.1.3Testing of finger joints.11 7.1.4Compliance.12 7.2Organization of facto
17、ry production control 13 7.2.1Responsibility and authority13 7.2.2Delegated by the manufacturer for factory production control .13 7.2.3Inspection by the manufacturer 14 7.3Documentation of the quality control system 14 7.4Inspection and testing .14 7.4.1General .14 7.4.2Action in case of non-confor
18、mity.14 7.4.3Quality surveillance of non-conforming finger joints.14 8Type testing, initial determination of joint strength.15 8.1General15 8.2Materials15 8.3Preparation of specimens .15 8.4Procedure15 8.5Test report.15 8.6Classification of joints15 Annex A (informative) The tasks of the third party
19、 certification body 16 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 385:2001 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 124 “Timber structures“, the secretariat of which is held by DS. This Eu
20、ropean Standard supersedes EN 385:1995. 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 April 2002, and conflicting national standards shall be withdrawn at the latest by April 2002. According to
21、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,
22、 Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 385:2001 (E) 4 Introduction This standard was written based on Recommended Standard for Finger Jointing in Coniferous Sawn Timber prepared by the
23、 ECE (Economic Commission of Europe) Timber Committee and published in the Timber Bulletin for Europe (Vol. XXXIV, Supplement 16, November 1982) with Draft Amendments, May 1988. This standard was developed on the basis of the use of European redwood and whitewood, but most of the requirements apply
24、to any species. Further, it was recognized that finger-jointing standards are currently in use in different countries and experience with these has influenced this standard. 1 Scope This standard specifies requirements for bonded finger joints and minimum requirements for the manufacture of cut, int
25、erlocking, bonded finger joints in structural timber members. Requirements are given for timber, adhesive, moisture content, cutting and bonding. This standard is only applicable to finger joints between timber members of the same species type. Although most finger joints are produced in coniferous
26、species this standard also applies to broad-leaved species where information is available to enable them to be satisfactorily bonded. It does not cover impressed (die-formed) joints. In the case of glued laminated timber it applies only to individual laminations. Large finger joints in glued laminat
27、ed timber are covered by EN 387. NOTE This standard is elaborated as a supporting standard for a harmonized standard on structural timber with finger joints to be published in the future. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other
28、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 it by amendment or r
29、evision. For undated references the latest edition of the publication referred to applies (including amendments). EN 301, Adhesives, phenolic and aminoplastic for load-bearing timber structures - Classification and performance requirements. EN 408, Timber structures Structural timber and glued lamin
30、ated timber Determination of some physical and mechanical properties. 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply: 3.1 finger joint self-locating end joint formed by machining a number of similar, tapered, symmetrical fingers in the e
31、nds of timber members, which are then bonded together. See Figure 1 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 385:2001 (E) 5 Key l Finger length p Pitch bt Tip width lt Tip gap 1) Symmetry direction Figure 1 - Typical profile of fin
32、ger joint 3.2 finger length distance between the finger base and the tip of the finger, measured along the centre line of the finger 3.3 pitch distance between fingers, centre to centre 3.4 production batch joints, all of which have the same profile, manufactured from the same species of timber, the
33、 same strength class, having the same nominal cross section, bonded with the same adhesive and made during a continuous run on one production line 3.5 service class 1 service class characterized by a moisture content in the materials corresponding to a temperature of 20 ?C and the relative humidity
34、of the surrounding air only exceeding 65 % for a few weeks per year NOTE In service class 1 the average equilibrium moisture content in most softwoods will not exceed 12 %. 3.6 service class 2 service class characterized by a moisture content in the materials corresponding to a temperature of 20 ?C
35、and the relative humidity of the surrounding air only exceeding 85 % for a few weeks per year NOTE In service class 2 the average equilibrium moisture content in most softwoods will not exceed 20 %. 3.7 service class 3 service class characterized by climatic conditions leading to higher moisture con
36、tents than service class 2 3.8 tip gap distance between finger tip and opposite slot base in a bonded finger joint Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 385:2001 (E) 6 3.9 tip width distance between finger faces, measured at the
37、 tip of the finger 4 Symbols Aarea, in square millimetres; AWarea of one wane, in square millimetres; aWdiagonal length of wane, in millimetres; bwidth of cross section, in millimetres; bttip width, in millimetres; ddiameter, in millimetres; fmbending strength, in newtons per square millimetre; fm,k
38、characteristic bending strength, in newtons per square millimetre; fm,15,kcharacteristic bending strength of 15 specimens, see 7.1.4, in newtons per square millimetre; fm,15,meanmean value of bending strength of 15 specimens, see 7.1.4, in newtons per square millimetre; fm,dc,kcharacteristic bending
39、 strength, declared by the manufacturer, in newtons per square millimetre; hdepth of cross section, in millimetres; kffactor, see 7.1.4; k15statistical factor, see 7.1.4; lfinger length, in millimetres; lttip gap, in millimetres; ppitch, in millimetres; sstandard deviation (the variable is given in
40、parenthesis). 5 Requirements 5.1 General The cutting and the bonding operations of finger joints shall result in reliable and durable bonds of required strength. These general requirements shall be considered satisfied if both the requirements in this clause and the minimum production requirements i
41、n clause 6 are fulfilled. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 385:2001 (E) 7 5.2 Timber 5.2.1 Species Sufficient information on the timber species shall be available to enable the timber to be satisfactorily bonded. 5.2.2 Knot
42、s and fissures For the following requirements knots with a diameter not greater than 6 mm shall be disregarded. There shall be no knots, fissures or pronounced grain disturbance within the joint itself. Outside the joint the distance between a knot and the end of the cross-cut timber shall be not le
43、ss than l + 3d where d is the diameter of the knot measured perpendicular to the grain direction (longitudinal direction), see Figure 2. Figure 2 - Minimum distance from the end of the timber to a knot Where a member is cross-cut to remove a knot, the cut shall be made at a distance from the knot at
44、 least equal to a length of 3d, see Figure 3. Figure 3 - Minimum distance for a cross-cut to remove a knot 5.2.3 Wane or edge damage There shall be no wane or edge damage affecting more than two corners at the joint within the finger length and within 75 mm of the root of the fingers. The area of th
45、e wane at any corner shall not exceed 1 % of the cross-sectional area, see Figure 4. NOTE Conformity with this requirement can be verified by measuring the diagonal aw of the wane and demonstrating that it is less than the maximum diagonal given in figure 5 as a function of the cross-sectional area
46、A. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 385:2001 (E) 8 Figure 4 - Cross section of timber with wane Figure 5 - Maximum diagonal of wane/5A = a maxW, 5.3Adhesives The adhesive shall enable joints of such strength and durability
47、to be produced in order that the integrity of the bond is maintained throughout the intended lifetime of the structure. Acceptable strength and durability can be achieved by the use of an adhesive of type I and shall meet the requirements for this type given in EN 301. Or, for structures in service
48、class 1 or 2 an adhesive of type II according to EN 301 can be used, provided the temperature of the member in the structure will always be below 50 ?C. NOTE 1 The adhesive should be chosen considering the climatic conditions in service, the timber species, the preservative used (if any) and the pro
49、duction methods. NOTE 2 Such strength and durability can be achieved by a polycondensation adhesive of the phenolic or aminoplastic type as defined in EN 301. For adhesives of other types than covered by EN 301 a bond with equivalent durability and strength shall be achieved. Special considerations shall be given to creep failure, the ability to maintain structural integrity during fire and elevated temperature and moisture conditions in ordinary service. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 03:31:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI E