1、INTERNATIONAL STANDARD ISO 19993 First edition 2007-11-01 Reference number ISO 19993:2007(E) ISO 2007 Timber structures Glued laminated timber Face and edge joint cleavage test Structures en bois Bois lamell-coll Essai de fendage des joints face face et longitudinauxISO 19993:2007(E) ii ISO 2007 All
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5、ven below.COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
6、 address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandISO 19993:2007(E) ISO 2007 All rights reserved iii Contents Page 1 S
7、cope 1 2 Terms and definitions 1 3 Principle 1 4 Apparatus . 1 5 Preparation of test pieces . 2 6 Procedure . 3 7 Test report 4 Bibliography . 5ISO 19993:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national st
8、andards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International o
9、rganizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules giv
10、en in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least
11、75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 19993 was prepared by Technical Committee ISO/TC 165, T
12、imber structures.ISO 19993:2007(E) ISO 2007 All rights reserved v Introduction This International Standard was developed by TC 165 as a factory quality-assurance test used for structural glulam and applies to the face joints of each production batch. The frequency of testing and the pass/fail criter
13、ia are detailed in ISO 12578 1) . However, there is nothing in principle that prevents the test method from being applied to non-structural glulam. Dry specimens are tested under ambient conditions and wet specimens are tested under ambient conditions after a vacuum-pressure soak. 1) To be published
14、 vi INTERNATIONAL STANDARD ISO 19993:2007(E) ISO 2007 All rights reserved 1 Timber structures Glued laminated timber Face and edge joint cleavage test 1S c o p e This International Standard specifies methods of evaluating the effectiveness of glued, laminated timber-face and edge bonds within a manu
15、facturing plant by cleaving of the glue line in both dry and wet conditions. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 wood failure area of wood fibre remaining on the bond line following completion of the cleavage test expressed as a p
16、ercentage of the total test area excluding any areas of wood defect (gum vein and similar) 2.2 cleavage rupture parallel to the wood grain of a glulam face joint bond line or the adjacent adherend by the application of normal stress 3 Principle A specimen consisting of a full cross-section of lamina
17、ted timber is cleaved apart along the plane bond lines and wood failure is assessed after wet or dry conditioning. 4 Apparatus 4.1 Chisel, with a wedge angle and thickness such that the tip of the blade does not touch the bottom of the saw cut of the test specimen before cleavage failure begins to o
18、ccur. The width of the chisel shall exceed that of the specimen. NOTE A bricklayers bolster is a suitable implement. 4.2 Hammer or mallet, with a minimum mass . 4.3 Wood cutting equipment, such as a panel saw, band saw or circular saw. 4.4 Autoclave or similar vessel, designed to withstand safely a
19、pressure of at least , equipped with a vacuum pump capable of drawing a vacuum of at least ( of mercury) in the vessel and a pump or other device to provide a pressure of at least . 1kg 500 kPa 65 kPa 500 mm 500 kPaISO 19993:2007(E) 2 ISO 2007 All rights reserved 5 Preparation of test pieces A membe
20、r for testing shall be manufactured to a slightly longer length than specified to allow for the removal of a representative specimen or specimens at the end of the member. The specimen(s) shall be removed from the off-cut portion at the end of the member after trimming to length. Each specimen shall
21、 be marked to identify the member from which it is cut. The specimens shall include the full cross-section of the laminated timber to be tested, perpendicular to the grain of the wood and long measured along the grain. Each bond line of the specimen shall be cut uniformly the full width of the speci
22、men to a depth of from one cross-cut face. For convenience, the specimen may be divided into smaller parts, provided the cuts are perpendicular to or well away from the bond lines, and that all parts are tested (see Figure 1). Dimensions in millimetres a) Composition of the test specimens b) Cuts in
23、 the bond line Key 1 test specimen 2 member 3w a s t e 4 grain direction Figure 1 Details of test specimen 25 mm 10 mmISO 19993:2007(E) ISO 2007 All rights reserved 3 6 Procedure 6.1 General Apart from the conditioning, the dry and wet cleavages involve identical procedures. 6.2 Conditioning for wet
24、 cleavage The conditioning shall be undertaken as follows. a) The test specimens shall be placed in the autoclave and fully immersed in water between and . The specimens shall be restrained so that they remain fully immersed throughout the conditioning period. The specimens shall be supported in suc
25、h a manner that all end grain surfaces are exposed to the water. b) A vacuum of at least shall be drawn and held for , then the vacuum shall be released and pressure of applied for . The vacuum-pressure cycle shall be repeated once more. NOTE For higher-density species, longer pressure and vacuum cy
26、cles can be required to achieve total water penetration. 6.3 Cleaving and assessment The following procedure shall be followed with respect to cleaving and wood failure assessment. a) Each bond line shall be cleaved by means of the chisel and hammer, ensuring that the tip of the chisel does not touc
27、h the bottom of the saw kerf prior to the onset of cleavage; see Figure 2. b) The wood failure percentage of each bond line shall be assessed to the nearest c) The average wood failure percentage of all bond lines in the cross-section shall be determined from the wood failure percentage of the indiv
28、idual bond lines of test specimen. NOTE Light at an oblique angle such as from a fluorescent desk lamp has been found beneficial in the assessment of wood failure. a Chisel shall not touch bottom of saw kerf prior to onset of cleavage failure. Figure 2 Details of saw kerf and chisel tip 10 C 27 C 65
29、 kPa 1,5 h 500 30 kPa 1,5 h 5%.ISO 19993:2007(E) 4 ISO 2007 All rights reserved 7 Test report The following results and general information shall be reported: a) date and number of this International Standard; b) date and time of glulam production; c) identification mark of the test pieces and membe
30、rs from which they have been cut; d) species of timber; e) type of adhesive; f) percentage wood failure of each bond line; g) average wood failure for all bond lines; h) whether or not the timber is fire-retardant or preservative-treated; i) name and signature of the person responsible for the testing.ISO 19993:2007(E) ISO 2007 All rights reserved 5 Bibliography 1 ISO 12578, Timber structures Glued laminated timber Component performance and production requirementsISO 19993:2007(E) ICS 91.080.20 Price based on 5 pages ISO 2007 All rights reserved