SANS 5419-2009 Pesticides - Evaluation of rodentproofness of building materials and constructions《农药 建筑材料和构筑物的防腐蚀评估》.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22298-7 SANS 5419:2009Edition 3SOUTH AFRICAN NATIONAL STANDARD Pesticides Evaluation of rodentproofness of building materials and construc

4、tions Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 5419:2009 Edition 3 Table of changes Change No. Date Scope Foreword This South African standard was approved by National Committee

5、SABS SC 1028F, Pesticides Laboratory facilities and rearing and handling of test animals, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in February 2009. This document supersedes SABS SM 419:1970 (first

6、revision). SANS 5419:2009 Edition 3 1 Pesticides Evaluation of rodentproofness of building materials and constructions 1 Scope This standard specifies a method for the evaluation of rodentproofness of building materials and constructions. NOTE In SANS 10080 rodentproof materials and constructions ar

7、e divided into two classes: class A material or construction which cannot be penetrated by rodents even when gnawable edges are accessible. It includes a material or construction which is accepted as class A by the Chief Health Officer of the Republic of South Africa, and a material or construction

8、which, after being tested in accordance with this standard, is classified as having an A degree of rodentproofness; and class B material or construction which, after being tested in accordance with this standard, is classified as having a B1, B2, B3, or B4degree of rodentproofness. 2 Test cages 2.1

9、Test cages for testing building materials (see figure 1) Semi-detached cages, each 450 mm 230 mm 150 mm and constructed of metal and a strong wire mesh of approximate aperture size 15 mm and wire diameter of at least 2,0 mm. The cage has a slit that can be adjusted to fit any test specimen of width

10、not exceeding 75 mm to allow the insertion of the test specimen. The slit is made in such a manner that when the test specimen is in position, this specimen is framed by metal beading 25 mm wide. SANS 5419:2009 Edition 3 2 Figure 1 Rat test cage 2.2 Test cages for testing wall constructions Ten cage

11、s that can be attached to and that will allow the rats access to the whole of the exposed surface of the test unit (see 4.2). NOTE It may be advantageous in some cases to construct the test units in the form of very small rooms that will act as cages as well as test units. 3 Test animals Twenty heal

12、thy normal adult wild rats of the species Rattus rattus Linn., trained as described in clause 7. 4 Test specimens 4.1 Building materials Twenty specimens, 200 mm wide and 165 mm high, cut at random from the sample to be tested. Ten of the specimens shall have a 25 mm 10 mm vertical slot in the centr

13、e, 50 mm below the top edge. 4.2 Wall constructions Ten test units (see 2.2) all of which have all the essential features of the construction incorporated. SANS 5419:2009 Edition 3 3 5 Test conditions Maintain the laboratory conditions at a temperature of 22 C 1 C and a humidity of 60 % 5 %. Ensure

14、that the laboratory is quiet and is kept dark during the training and testing periods, except when the barriers are replaced or the test specimens are inspected for damage. NOTE Undue noise disturbs the rats. 6 Feeding of test animals Use mice cubes as food and as bait. Supply water to the rats thro

15、ughout the training and test periods by means of a feeding bottle with a rubber stopper through which a glass tube is inserted. 7 Training of test animals 7.1 Prepare enough cages (see 2.1) by using slotted double-faced corrugated fibreboard barriers to divide each cage into two compartments and put

16、ting the bait in one compartment and the water supply in the other. Place a rat in the compartment containing the water supply and leave it in the cage for 2 d, replacing penetrated barriers and renewing the supply of bait when necessary. 7.2 After the initial 2 d training period has elapsed, repeat

17、 the procedure in 7.1 but use, firstly, unslotted double-faced corrugated fibreboard barriers, secondly, slotted, and thirdly, unslotted 6,5 mm thick Baltic deal barriers. 7.3 Use for the test only those rats which penetrated all four types of barriers and, for 2 d before starting the test, remove t

18、he barriers and feed the rats. 8 Test procedure 8.1 Building materials 8.1.1 Using the 10 slotted test specimens (see clause 4) as barriers, prepare 10 cages in the same way as described in 7.1. Place one rat (in the compartment containing the water supply) in each cage and expose each test specimen

19、 to a rat for 72 h. Then remove the test specimens and allow the rats free access to food for 72 h. During this period, using a further 10 cages and the remaining 10 rats, expose the same test specimens to the rats for 72 h. Repeat this procedure for a total exposure period of 432 h, ensuring that e

20、ach test specimen is exposed to the same team of two rats throughout the duration of the test. 8.1.2 Test the 10 unslotted test specimens (see clause 4) in the same way. 8.2 Wall constructions Attach a cage (see 2.2) securely to each test unit (see 4.2), place a supply of water (see clause 6) in the

21、 cage and place bait on the side of the test unit remote from the cage. Expose each unit, for a total period of 432 h, to 72 h attacks by a team of two rats used alternately. Allow each rat free access to food and water during its “rest“ periods. 9 Assessment of rodentproopness Record, at 24 h inter

22、vals, the damage done to each test specimen or test unit, the number of specimens or units penetrated, and the condition of each rat used in the tests. Use these results to determine from table 1 the degree of rodentproofness of the material or construction tested by classifying it in accordance wit

23、h the lowest value for resistance to penetration obtained. SANS 5419:2009 Edition 3 4 Table 1 Degree of rodentproofness 1 2 3 Degree of rodentproofness Duration of resistance to penetration h Slotted test specimens and test units that have apertures Unslotted test specimens and test units without ap

24、ertures A 432 B1 432 B2 288 B3 144 B4 72a aIf the duration of resistance to penetration is less than 72 h, the material or construction is classified as not being rodentproof. Bibliography SANS 10080, The rodentproofing of buildings. SABS SABS Standards Division The objective of the SABS Standards D

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