1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 772-16:2011Methods of test for masonryunitsPart 16: Determination of dimensionsBS EN 772-16:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementa
2、tion of EN 772-16:2011. Itsupersedes BS EN 772-16:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/519/1, Masonry units.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purp
3、ort to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 70259 4ICS 91.100.25Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandar
4、ds Policy and Strategy Committee on 31 May 2011.Amendments issued since publicationDate Text affectedBS EN 772-16:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 772-16 May 2011 ICS 91.100.25 Supersedes EN 772-16:2000English Version Methods of test for masonry units - Part 16: Determination
5、 of dimensions Mthodes dessai des lments de maonnerie - Partie 16: Dtermination des dimensions Prfverfahren fr Mauersteine - Teil 16: Bestimmung der Mae This European Standard was approved by CEN on 25 December 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which sti
6、pulate 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 CEN-CENELEC Management Centre or to any CEN member. This European
7、 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are th
8、e national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, S
9、witzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref.
10、No. EN 772-16:2011: EBS EN 772-16:2011EN 772-16:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Principle 44 Symbols 45 Apparatus .46 Preparation of specimens .56.1 Sampling .56.2 Surface treatment 57 Procedure .57.1 Length, width and height 57.2 Thickness of shells and webs .9
11、7.3 Depth of holes 97.4 Plane parallelism of the bed faces .97.5 Combined thickness of webs and shells .98 Calculation and expression of results 109 Test report . 10Annex A (informative) Examples of paths chosen for the measurement of combined thickness . 12Annex B (informative) Significant technica
12、l changes between this European standard and the previous edition 15BS EN 772-16:2011EN 772-16:2011 (E) 3 Foreword This document (EN 772-16:2011) has been prepared by Technical Committee CEN/TC 125 “Masonry”, the secretariat of which is held by BSI. This European Standard shall be given the status o
13、f a national standard, either by publication of an identical text or by endorsement, at the latest by November 2011, and conflicting national standards shall be withdrawn at the latest by November 2011. Attention is drawn to the possibility that some of the elements of this document may be the subje
14、ct of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 772-16:2000. Annex B provides details of significant technical changes between this European Standard and the previous edition. According to the CEN/CENELE
15、C Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
16、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 772-16:2011EN 772-16:2011 (E) 4 1 Scope This European Standard specifies a method of determining the overall dimensions, thickness and combined thickness o
17、f shells and webs, depth of voids and plane parallelism of the bed faces of masonry units. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest editio
18、n of the referenced document (including any amendments) applies. EN 771-1, Specification for masonry units Part 1: Clay masonry units EN 771-2, Specification for masonry units Part 2: Calcium silicate masonry units EN 771-3, Specification for masonry units Part 3: Aggregate concrete masonry units (D
19、ense and light-weight aggregates) EN 771-4, Specification for masonry units Part 4: Autoclaved aerated concrete masonry units EN 771-5, Specification for masonry units Part 5: Manufactured stone masonry units EN 771-6, Specification for masonry units Part 6: Natural stone masonry units 3 Principle A
20、fter preparation, the length, width and height of the specimens, the thickness of shells and webs, depth of holes and plane parallelism of bed faces are measured with an appropriate device. 4 Symbols lu is the length of the masonry unit defined by its intended orientation in use, (mm); wu is the wid
21、th of the masonry unit defined by its intended orientation in use, (mm); hu is the height of the masonry unit defined by its intended orientation in use, (mm). 5 Apparatus An appropriate measuring device or devices conforming to the requirements for measuring precision given in Table 1. BS EN 772-16
22、:2011EN 772-16:2011 (E) 5 Table 1 Measurement precision Tolerance on the dimension being measured mm Maximum measuring error mm 1 0,5 If the tolerance class of the dimension being measured is not known then the maximum measuring error of the measuring device shall be not more than 0,1 mm. The device
23、 used for measuring the thickness of webs and shells shall have a jaw of at least 10 mm in length. 6 Preparation of specimens 6.1 Sampling The method of sampling shall be in accordance with the relevant part of EN 771. The minimum number of specimens shall be six except in the determination of combi
24、ned thickness and plane parallelism, where it is three, but a larger minimum number may be specified in the product specification, in which case that larger number shall be used. 6.2 Surface treatment Remove any superfluous material adhering to the unit as a result of the manufacturing process befor
25、e measuring. Before measurement of the thickness of webs and shells the bed face of the unit should be ground to remove any such material. 7 Procedure 7.1 Length, width and height For clay, aggregate concrete, autoclaved aerated concrete, manufactured stone and natural stone masonry units determine
26、the length (lu), the width (wu) and the height (hu) using procedure a), procedure b) or procedure c) as is relevant. a) Two measurements taken near the edges of each specimen at the positions shown in Figure 1 a). If two of the three following conditions are satisfied lu 250 mm, wu 125 mm, hu 100 mm
27、, use procedure b). b) One measurement at the mid point of the unit as shown in Figure 1 b) using a calliper with overlapping jaws aligned along the dotted line. c) For specimens having irregular surfaces (tongues and grooves, grip holes, rendering keyways, etc.) determine the length, width and heig
28、ht at the positions shown in Figure 1 c). For calcium silicate masonry units determine the length (lu), the width (wu) and the height (hu) using BS EN 772-16:2011EN 772-16:2011 (E) 6 procedure (d) or procedure (e) as is relevant. d) One measurement taken approximately at the centre of each specimen
29、at the positions shown in Figure 1(d). e) For specimens having irregular surfaces (tongues and grooves, grip holes, rendering keyways, etc. determine the length, width and height at the positions shown in Figure 1 e). Length Width Height Figure 1 a) - Measurement positions Length Width Height Figure
30、 1b) - Measurement positions BS EN 772-16:2011EN 772-16:2011 (E) 7 Length Width Height Figure 1 c) - Measurement positions BS EN 772-16:2011EN 772-16:2011 (E) 8 Length Width Height Figure 1 d) - Measurement Positions Figure 1 e) - Measurement Positions BS EN 772-16:2011EN 772-16:2011 (E) 9 Figure 1
31、f) - Measurement positions 7.2 Thickness of shells and webs Where required by the relevant part of EN 771, measure the thickness of the webs and shells of each specimen for each declared web and shell thickness. Measure at discrete points at three separate positions on the type of web or shell being
32、 measured. The positions should be chosen by visual inspection to be representative of the minimum thickness of the web or shell being measured. State the measured thickness of the webs and the shells of each specimen to the nearest 0,2 mm. 7.3 Depth of holes Where required by the relevant part of E
33、N 771, measure the depth of each hole which does not pass through the masonry unit at two different positions. State the result of each depth measurement to the nearest 0,5 mm. 7.4 Plane parallelism of the bed faces Where required by the relevant part of EN 771, determine the plane parallelism of th
34、e bed faces of the unit using procedure f) and as shown in Figure 1 f). Procedure f): Ensure that the masonry unit is positioned in a stable manner on a flat dimensionally stable surface prior to the measurement. Measure the distance from the flat surface to the top of the bed face on all four corne
35、rs of the masonry unit. State the result of each measurement to the nearest 0,2 mm. 7.5 Combined thickness of webs and shells Determine the combined thickness of webs and shells. This is the sum of the thicknesses of individual webs and shells on a path linking the formed voids and going from one fa
36、ce to the opposite face and/or one header to the opposite header. Determine the thickness of each individual web or shell on the chosen path. NOTE The path which is chosen may not be a straight line, but is the one which gives the lowest combined thickness. Some examples are shown in Annex A. BS EN
37、772-16:2011EN 772-16:2011 (E) 10 8 Calculation and expression of results If option a) or option c) or option e) of 7.1 is chosen, calculate the length (lu), width (wu) and height (hu) of each specimen as the mean of the two measurements, where two are taken (option e) expressed to the nearest 0,1mm,
38、 0,2 mm or 0,5 mm depending on the tolerance on the dimension being measured (see Table 1). If option b) or option d) or option e) (where one measurement is taken) of 7.1 is chosen, express the length (lu), width (wu) and height (hu) of each specimen to the nearest 0,1 mm, 0,2 mm or 0,5 mm depending
39、 on the tolerance on the dimension being measured (see Table 1). Calculate the length, width and height for the sample as the mean of the values of the individual specimens. Express the result to the nearest 0,1 mm when the measuring error is 0,1 mm, 0,5 mm when the maximum measuring error is 0,2 mm
40、 and to the nearest 1 mm when the maximum measuring error is 0,5 mm. Calculate the mean web and shell thickness for each specimen to the nearest 0,2 mm. Calculate the thickness of webs and shells as the mean of the values of the individual specimens for the sample and express the result to the neare
41、st 0,5 mm. Calculate the mean depth of each hole, where necessary, and state this to the nearest 0,5 mm. Calculate the depth of the holes for the sample as the mean values of the individual specimens to the nearest 1 mm. Calculate the deviation from the plane parallelism as the difference between th
42、e maximum and minimum measured distance from the corner of the top bed face of the masonry unit to the flat surface and express it to the nearest 0,2 mm. The deviation from plane parallelism is taken to be the largest value from all of the units expressed to the nearest 0,2 mm. Calculate the sum of
43、the thicknesses of the longitudinal webs and shells along the imaginary path from one face to the opposite face of the unit to the nearest 0,5 mm. Express the result as a percentage of the width of the unit to the nearest percent. Calculate the sum of the thicknesses of the transverse webs and shell
44、s along an imaginary path from one header to the opposite header of the unit to the nearest 0,5 mm. Express the result as a percentage of the length of the unit to the nearest percent. 9 Test report The test report shall contain the following information: a) number, title and date of issue of this E
45、uropean Standard; b) a description of the specimens to the relevant part of EN 771; c) method of sampling and by which organization; d) date of receipt of the specimens by the test laboratory; e) date of testing the specimens; f) number of specimens in sample; g) a description of the measuring devic
46、e; h) way of measuring see 7.1 a), b), c), d) or e); BS EN 772-16:2011EN 772-16:2011 (E) 11 i) length (lu), width (wu) and height (hu) of each specimen expressed to the nearest 0,1 mm, 0,2 mm or 0,5 mm (see Clause 8), the mean values of length, width and height for the sample being expressed to the
47、nearest 0,1 mm, 0,5 mm or 1 mm (see Clause 8) and the precision of the measuring device; j) thickness of shells and webs, when required by the relevant part of EN 771, stated to the nearest 0,2 mm for each individual specimen and the value for the sample which is the mean of the individual thickness
48、es stated to the nearest 0,5 mm; k) mean depth of each hole, where required by the relevant part of EN 771, stated to the nearest 0,5 mm and the mean value for the sample expressed to the nearest 1 mm; l) maximum deviation from plane parallelism for each unit to the nearest 0,2 mm; m) combined thick
49、ness of longitudinal webs and shells, which is the mean of the values for the individual units expressed to the nearest percent; n) combined thickness of transverse webs and shells, which is the mean of the values for the individual units expressed to the nearest percent; o) remarks, if any. BS EN 772-16:2011EN 772-16:2011 (E) 12 Annex A (informative) Examples of paths chosen for the measurement of combined thickness Figure A.1 Example of the shortest path from face to face for the d
