1、BRITISH STANDARD Personal protective equipment against falls from a height Descender devices Single-hand operated descender devices for self or assisted rescue BS 8405:2003 +A1:2009 ICS 13.340.60 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/06/2009 03:33, Uncontrolled Copy, (c) BSIThis
2、British Standard was published under the authority of the Standards Policy and Strategy Committee on 17 March 2003 The following BSI references relate to the work on this British Standard: Committee reference PH/5 Draft for comment 99/566209 DC Committees responsible for this British Standard The pr
3、eparation of this British Standard was entrusted to Technical Committee PH/5, Industrial safety belts and harnesses, upon which the following bodies were represented: Arboricultural Safety Council Association of Consulting Scientists BSIF Test and Certification Association British Telecommunications
4、 plc Confederation of British Metalforming Construction Fixings Association Electricity Association Health and Safety Executive Industrial Rope Access Trade Association Institution of Mechanical Engineers Made-up Textiles Association Ministry of Defence (UK Defence Standardization) National Engineer
5、ing Laboratory National Federation of Master Steeplejacks and Lightning Conductor Engineers North West Construction Safety Group Personal Safety Manufacturers Association SATRA Technology Centre Co-opted members Amendments issued since publication Amd. No. Date BS 8405:2003+A1:2009 BSI February 2009
6、 Comments See forewordA1February 2009 ISBN 78 0 580 61140 7 9 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/06/2009 03:33, Uncontrolled Copy, (c) BSIBS 8405:2003+A1:2009 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative references 1 3T e r m s
7、 a n d d e f i n i t i o n s 1 4 Requirements 1 5 Test methods 3 6M a r k i n g 7 Instructions for use Bibliography 6 Figure 3 Apparatus for fall arrest test Figure 1 Apparatus for descent velocity and temperature increase test. Method 2 Figure 2 Apparatus for descent velocity and temperature increa
8、se test. Method 3 BSI February 2009 8 10 1 1 11 13 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/06/2009 03:33, Uncontrolled Copy, (c) BSIii BSI February 2009 Foreword This British Standard has been prepared by Technical Committee PH/5. This publication does not purport to include all th
9、e necessary provisions of a contract. Users are responsible for its correct application. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, The BSI copyright notice displayed in this document indicates when the document was last issued. BS 8405:2003+A1:200
10、9 Compliance with a British Standard cannot confer immunity from legal obligations. The start and finish of text introduced or altered by Amendment No. 1 is indicated in the text by tags ! “ BS 8405:2003+A1:2009 supersedes BS 8405:2003, which is withdrawn. . pages 1 to 13 and a back cover. Licensed
11、Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/06/2009 03:33, Uncontrolled Copy, (c) BSIBS 8405:2003+A1:2009 1 1 Scope This British Standard specifies performance requirements for descender devices that are controllable by one person using one hand only, to be used for self-rescue, rescue assisted
12、 by a second person, or where the rescuer and rescuee descend in tandem. This British Standard is applicable to descender devices for use in conjunction with personal protective equipment against falls from a height e.g. full body harnesses conforming to BS EN 361, and rescue equipment e.g. rescue h
13、arnesses conforming to BS EN 1497. NOTE Other types of descender devices for self rescue are specified in BS EN 341. 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 ref
14、erences, the latest edition of the referenced document (including any amendments) applies. BS 7479, Method for salt spray corrosion tests in artificial atmospheres. BS EN 364:1993, Personal protective equipment against falls from a height Test methods. BS EN 365, Personal protective equipment agains
15、t falls from a height General requirements for instructions for use and for marking. BS EN 892:1997, Mountaineering equipment Dynamic mountaineering ropes Safety requirements and test methods. BS EN 1891:1998, Personal protective equipment for prevention of falls from a height Low stretch kernmantel
16、 ropes. BS EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force measuring system. ISO 1140, Ropes Polyamide Specification. ISO 1141, Ropes Polyester Specification. 3 Terms and definit
17、ions For the purposes of this British Standard the following terms and definitions apply. 3.1 descender device control descent velocity NOTE A descender device enables descent from a higher to a lower position at a controllable velocity. 3.2 maximum rated load maximum load that a descender device is
18、 designated to carry as stated by the manufacturer NOTE This load includes persons and tools and equipment. 3.3 minimum rated load minimum load that a descender device is designated to carry as stated by the manufacturer 4 Requirements 4.1 Innocuousness BSI February 2009 device used in conjunction w
19、ith a descent line, that employs an integral hand-operated control element to !4.1.1 Materials used in the descender device that might come into contact with the skin of the user shall not be known to cause irritating or sensitizing effects during intended use. Conformity to this requirement shall b
20、e verified in accordance with 5.4. NOTE Attention is drawn to the Dangerous Substances and Preparations (Nickel)(Safety) Regulations 2005 1. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/06/2009 03:33, Uncontrolled Copy, (c) BSI2 4.2 Ropes, webbing and terminations conform to 4.2.2 or 4.
21、2.3, as applicable, and shall be fitted with terminations made exclusively by the The manufacturer shall ensure that the instructions for use (see Clause 7) include a warning that the descender device should only be used with the descent line with which it has been supplied, and that if the descent
22、line is replaced it is essential that it be replaced by one with exactly the same specification. 4.2.2 Synthetic fibre ropes Synthetic fibre ropes of a non-sheathed core construction shall conform to ISO 1140 or ISO 1141. Sheathed core ropes shall be either single mountaineering ropes conforming to
23、BS EN 892:1997 or low stretch kernmantel ropes, type A, conforming to BS EN 1891:1998. 4.2.3 Textile webbing Textile webbing shall be made from virgin filament or multifilament synthetic fibres that have a minimum breaking strength of 0.6 N/tex. 4.3 Static performance 4.3.1 Operating force When test
24、ed in accordance with 5.1.2.1, with a force applied to the descender device equal to the maximum rated load, the force needed to release and operate the integral hand-operated control element of the descender device (i.e. to cause the device to move down the descent line) shall not exceed 450 N. 4.3
25、.2 Static strength When tested in accordance with 5.1.2.2 the descender device shall withstand a force of 8 times the maximum rated load for 3 min without failure of the descent line or the descender device. 4.3.3 Emergency locking and slippage 4.3.3.1 Locking with control element in the hand-on pos
26、ition When tested in accordance with 5.1.2.3, with a force of 450 applied to the integral hand-operated control element, the descender device shall withstand a force of 1.5 times the maximum rated load without moving down the descent line. NOTE This requirement is intended to ensure that the descend
27、er device will support 1.5 times the maximum rated load, which might be applied to it in an emergency if the operator of the descender device is pulling or holding onto the integral hand-operated control element for support. 4.3.3.2 Slippage When tested in accordance with 5.1.2.4, slippage of the de
28、scender device on the descent line shall occur at a force of no greater than 4 times the maximum rated load. 4.4 Dynamic performance 4.4.1 Descent velocity 0 45 N If the manufacturer of the descender device supplies a descent line with the device, the descent line shall manufacturer of the descender
29、 device or by a manufacturer authorized by him. 4.2.1 General 4.1.2 When examined in accordance with 5.4, the descender device shall have no sharp edges or burrs which could cause injury to the user.“ BS 8405:2003+A1:2009 !When tested in accordance with 5.2.1, 5.2.2 or 5.2.3, the descender device sh
30、all maintain a descent velocity not exceeding 2 m/s and it shall be possible for the descent rate of the descender device to be controlled by one person using one hand only in the following test situations: a) with a mass, or force, equivalent to the maximum rated load (two person condition); b) wit
31、h a mass, or force, equivalent to the minimum rated load (low load test).“ BSI February 2009 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/06/2009 03:33, Uncontrolled Copy, (c) BSIBS 8405:2003+A1:2009 3 4.4.3 Descent velocity on wet descent line exceeding 2 m/s. NOTE This requirement is
32、intended to ensure that the descender device will operate with the maximum rated load on a wet descent line. 4.4.4 Fall arrest a) the descender device shall not release the weight; b) if the descent line is a kernmantel rope, the sheathing shall not rupture; d) the peak force shall not exceed 6 time
33、s the maximum rated load. After this test, the descender device shall be retested in accordance with 5.1.2.1 and shall conform to 4.3.1. 4.5 Corrosion resistance When tested in accordance with 5.3, the metal parts of the descender device shall show no visible evidence of corrosion. NOTE 1 White scal
34、ing or tarnishing is acceptable. NOTE 2 Even though the descender device is required to be resistant to corrosion when subjected to a neutral salt spray test, this should not be taken to mean that the devices are suitable for use in a marine environment. 5 Test methods 5.1 Static tests 5.1.1 Apparat
35、us 5.1.1.1 Tensile testing machine, calibrated in accordance with BS EN ISO 7500-1, set to operate at a crosshead velocity of 100 mm/min to 150 mm/min. The calibration of the tensile testing machine shall be traceable to national or international standards of measurement which, in the UK, are the re
36、sponsibility of the National Physical Laboratory (NPL). 5.1.1.2 Descent line, comprising the rope or webbing, and terminations, with which the descender device under test is to be used, as specified by the manufacturer (see Clause 7). 5.1.1.3 Spring balance, calibrated to measure force in newtons. 5
37、.1.2 Procedures 5.1.2.1 Operating force test Install the descender device, fitted to the descent line (5.1.1.2), in the tensile testing machine (5.1.1.1). Withdraw 1 000 mm 50 mm of the descent line up-line from the descender device. Arrange the integral hand-operated control element in the hand-off
38、 position. Operate the crosshead of the tensile testing machine until it is applying to the descender device a force equal to the maximum rated load. Attach the spring balance (5.1.1.3) to the integral hand-operated control element and use it to apply a force to the control element, in the direction
39、 in which force would be applied when the descender device is being operated. Record the force at which slippage of the descender device down the descent line occurs. 4.4.2 Temperature increase 0 0.2 50 ! “ 2 maximum rated load, after a descent at a velocity of m/s no part of the descender device th
40、at would normally be touched during a descent shall have reached a temperature higher than above ambient temperature, whichever is the lower. C, or 30 C BSI February 2009 3 When tested in accordance with 5.2.1, 5.2.2 or 5.2.3, with a mass, or force, equivalent to the When tested in accordance with 5
41、.2.4 the descender device shall maintain a descent velocity not When the descender device is tested in accordance with 5.2.5 the following requirements shall be met: c) the free fall distance, h, shall not exceed 4 m (see Figure 3); Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 23/06/2009 0
42、3:33, Uncontrolled Copy, (c) BSI5.1.2.2 Static strength test Install the descender device, fitted to the descent line (5.1.1.2), in the tensile testing machine (5.1.1.1). Withdraw 1 000 mm 50 mm of the descent line up-line from the descender device. Hold the down-line end of the descent line in such
43、 a manner that it does not interfere with the application of the test force across the up-line descent line termination and descender device attachment point (e.g. by insertion of a suitable knot). Arrange the integral hand-operated control element in the hand-off position. Operate the crosshead of
44、the tensile testing machine until it is applying to the descender device a force equal to 8 times the maximum rated load. Maintain the force for 3 min. 5.1.2.3 Hand-on locking test Install the descender device, fitted to the descent line (5.1.1.2), in the tensile testing machine (5.1.1.1). Withdraw
45、1 000 mm 50 mm of the descent line up-line from the descender device. Operate the crosshead of the tensile testing machine until it is applying to the descender device a force equal to 1.5 times the maximum rated load. Arrange the integral hand-operated control element in the hand-on position. Attac
46、h the spring balance (5.1.1.3) to the control element and use it to apply a force of 450 to the control element, in the direction in which force would be applied when the descender device is being operated. 5.1.2.4 Slippage test Install the descender device, fitted to the descent line (5.1.1.2), in
47、the tensile testing machine (5.1.1.1). Withdraw 1 000 mm 50 mm of the descent line up-line from the descender device. Arrange the integral hand-operated control element in the hand-off position. Operate the crosshead of the tensile testing machine and record the test force at which the descender dev
48、ice slips down the descent line. 5.2 Dynamic tests 5.2.1 Descent velocity and temperature increase test. Method 1 5.2.1.1 Apparatus 5.2.1.1.2 Rigid steel weights, 200 mm in diameter, one with a mass equivalent to the maximum rated load and one with a mass equivalent to the minimum rated load, of the
49、 descender device under test. Each weight shall have an eyebolt rigidly fixed to one end in a central position. 5.2.1.1.3 Quick release device, compatible with the eyebolts on the rigid steel weights. 5.2.1.1.5 Thermometer, thermocouple type, with electronic read-out. 5.2.1.2 Procedure Fit the descender device to the descent line (5.2.1.1.4). Attach the descender device, upside down, by the descender device attachment point, to the rigid an
