ISO INTERNATIONAL STANDARD 22157 First edition 2019-01 Bamboo structures -Determination of physical and mechanical properties of bamboo culms -Test methods Structures en bambouDetermination des proprietes physiques et mecaniques des tiges de bambou-Methodes d'essais Reference number ISO 22157:2019(E) o ISO 2019 IS0 22157:2019(E) COPYRIGHT PROTECTED DOCUMENT OISO2019 All rights reserved.Unless otherwise specified,or required in the context ofits implementation,no part ofthis publication may be reproduced or utilized otherwise in any form or by any means,electronic or mechanical,including photocopying,or posting below or ISO's member body in the country of the requester. ISO copyright office CP 401-Ch.de Blandonnet 8 CH-1214Vernier,Geneva Phone:+41227490111 Fax:+41227490947 Email:[email protected] Website:www.iso.org Published in Switzerland ii O ISO 2019-All rights reserved 22157:2019(E) ISO Contents Page Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols 5 General requirements 5.1 Temperature and humidity 5.2 Rate ofload application ...... 5.3 Calibration 5.4 Test report Sampling and storage of specimens 6 6.1 Sampling 6.2 Selection 6.3 Felling, marking and sample preparation 6.4 Despatch 6.5 Receipt and storage of the bamboo culms 6.6 Marking and conversion into test specimens Moisture content 7 7.1 Moisture content by oven -dry method 7.1.1 Apparatus 7.1.2 Preparation oftest pieces 7.1.3 Procedure 7.1.4 Calculation and expression of results 7.2 Moisture content by electrical moisture meter method 7.2.1 General Apparatus 7.2.2 7.2.3 Procedure 7.2.4 Calculation and expression of results 7.2.5 Test report Density 8 8.1 General 8.2 8.3 Preparation of testpieces 8.4 Procedure 8.5 Calculations and expressions of results 8.6 Test report 10 9 Mass per unit length 10 9.1 General 10 9.2 Apparatus 10 9.3 Preparation of testpieces 10 9.4 Procedure 10 9.5 Calculations and expressions of results 10 10 Compression strength and stiffness parallel to the fibres 10.1 Apparatus 11 10.2 Preparation oftests specimens 12 10.3 Procedure... 12 10.4 Calculation and expression ofresults 13 10.5 Test report 13 .+..+. 11 Tension strength and stiffness parallel to the fibres 11.1 Apparatus 13 ....+..+............+...... OIS0 2019-All rights reserved ili