SIST EN 1495:1999+A2:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Hebebühnen - Mastgeführte KletterbühnenMatériels de mise à niveau - Plates-formes de travail se déplaçant le long de mât(s)Lifting platforms - Mast climbing work platforms53.020.99Druga dvigalna opremaOther lifting equipmentICS:Ta slovenski standard je istoveten z:EN 1495:1997+A2:2009SIST EN 1495:1999+A2:2010en,fr,de01-februar-2010SIST EN 1495:1999+A2:2010SLOVENSKI
STANDARD



SIST EN 1495:1999+A2:2010



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1495:1997+A2
July 2009 ICS 53.020.99 Supersedes EN 1495:1997English Version
Lifting platforms - Mast climbing work platforms
Matériels de mise à niveau - Plates-formes de travail se déplaçant le long de mât(s)
Hebebühnen - Mastgeführte Kletterbühnen This European Standard was approved by CEN on 21 April 1997 and includes Corrigendum 1 issued by CEN on 11 December 1997, Amendment 1 approved by CEN on 1 September 2003 and Amendment 2 approved by CEN on 19 June 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate 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 Management Centre or to any CEN member.
This European 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1495:1997+A2:2009: ESIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 2 Contents Page Foreword .3Introduction .41Scope .42Normative references .53Definitions .64List of hazards . 115Safety requirements and/or measures . 155.1Structural and stability calculations . 155.2General machine requirements, base frame, chassis and mast . 255.3Work platform . 285.4Drive systems for elevation . 315.5Means to prevent the work platform from falling with overspeed . 335.6Means for emergency lowering and raising the work platform . 355.7Overload/moment device . 365.8Electrical systems. 385.9Hydraulic system . 395.10Special requirements for safety devices, depending on auxiliary circuits and for overload/moment devices . 405.11Travel limit switches . 405.12Controls . 416Verification of the safety requirements and/or measures . 416.1Examinations and tests for each new model of MCWP . 417Information for use . 447.1Instruction handbook . 447.2Marking . 50Annex A (informative)
Structural calculations . 52Annex B (normative)
Special requirements for multilevel work platforms . 66Annex C (normative)
Requirements for electrical and electronic aspects of overload detecting devices . 68Annex ZA (informative)
#Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC$ . 71Annex ZB (informative)
#Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC$ . 72 SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 3 Foreword This document (EN 1495:1997+A2:2009) has been prepared by Technical Committee CEN/TC 98 “Lifting platforms”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2010, and conflicting national standards shall be withdrawn at the latest by January 2010. This European Standard was approved by CEN on 21 April 1997 and includes Corrigendum 1 issued by CEN on 11 December 1997, Amendment 1 approved by CEN on 1 September 2003 and Amendment 2 approved by CEN on 19 June 2009. This document supersedes EN 1495:1997. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! "
and # $. The modifications of the related CEN Corrigendum have been implemented at the appropriate places in the text and are indicated by the tags ˜ ™. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). #For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document.$ It is a type C- standard related to safety for Mast Climbing Work Platforms. #deleted text$ According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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, Switzerland and United Kingdom.
SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 4 Introduction This standard is one of a series of standards produced by CEN/TC 98 as part of the CEN/CENELEC programme of work to produce machinery safety standards. EN 414 (Safety of machinery – Rules for the drafting and presentation of safety standards) has been used as a guide in the preparation of this standard. This standard has been prepared to be a harmonized standard to provide one means of conforming with the essential safety requirements of the Machinery Directive. The extent to which hazards are covered is indicated in the scope of this standard. In addition, lifting equipment shall comply as appropriate with !EN ISO 12100" for hazards which are not covered by this standard. 1 Scope 1.1 This standard specifies the special safety requirements for Mast Climbing Work Platforms (MCWP) which are temporarily installed and are manually or power operated and which are designed to be used by one or more persons from which to carry out work. The vertical moving components (work platform) are also used to move those same persons and their equipment and materials to and from a single boarding point. These restrictions differentiate MCWPs from Builder's hoists. The standard can also be used for permanently installed MCWP. 1.2 This standard is applicable to work platforms elevated by rack and pinion and guided by and moving along their supporting masts, where the masts may or may not require lateral restraint from separate supporting structures. 1.3 This standard is applicable to any combination of the following alternatives:  One or more masts;  Mast tied or untied;  Mast of fixed or variable length;  Masts vertical or inclined between 0° and 30° to the vertical;  Masts which are standing or hanging;  Movable or static base (chassis, or base frame);  Manually or power operated elevation;  Towed or self powered ground travel on site, excluding road traffic regulation requirements;  Driven using electric, pneumatic or hydraulic motors. 1.4 This standard identifies the hazards arising during the various phases in the life of such equipment and describes methods for the elimination or reduction of these hazards and for the use of safe working practices. SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 5 1.5 This standard does not specify the requirements for dealing with the hazards involved in the manoeuvring, erection or dismantling, fixing or removing of any materials or equipment which are not part of the Mast Climbing Work Platform (MCWP). Neither does it deal with the handling of specific hazardous materials. 1.6 This standard does not specify the requirements for delivering persons and materials to fixed landing levels. Such equipment is referred to as lifts or hoists and are dealt with by other standards. 1.7 This standard does not include Mobile Elevating Work Platforms (MEWPs) according to #EN 280$, Suspended access equipment according to #EN 1808$ or Lifting tables according to #EN 1570$. 2 Normative references #The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.$ #deleted text$ EN 294:1992, Safety of machinery — Safety distances to prevent danger zones being reached by the upper limbs EN 349:1993, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body EN 418:1992, Safety of machinery — Emergency stop equipment, functional aspects – Principles for design EN 614-1:1995, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles EN 953:1997, Safety of Machinery — General requirements for the design and construction of guards (fixed, movable) EN 954-1:1996, Safety of Machinery — Safety-related parts of control systems — Part 1: General principles for design EN 982:1996, Safety of machinery — Safety requirements for fluid power systems and components — Hydraulics EN 60065:1993, Safety requirements for mains operated electronic and related apparatus for household and similar general use EN 60204-1:1992, Safety of machinery — Electrical equipment of machines — Part 1: General requirements EN 60529:1992, Degrees of protection provided by enclosures (IP code) EN 60947-5-1:1991, Low-voltage switchgear and controlgear — Part 5: Control circuit devices and switching elements — Section 1: Electromechanical control circuit devices and switching elements #EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003) EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles (ISO 12100-2:2003)$ ISO 4301-1:1986, Cranes and lifting appliances — Classification — Part 1: General ISO 4302:1989, Cranes — Wind load assessment SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 6 ISO 6336-1, Calculation of load capacity of spur and helical gears — Part 1: Basic principles, introduction and general influence factors ISO 6336-2, Calculation of load capacity of spur and helical gears — Part 2: Calculation of surface durability (pitting) ISO 6336-3, Calculation of load capacity of spur and helical gears — Part 3: Calculation of tooth strength ISO 6336-5, Calculation of load capacity of spur and helical gears — Part 5: Strength and quality of materials ISO 8686-1:1989, Cranes — Design principles for loads and load combinations — Part 1: General 3 Definitions For the purposes of this standard the following definitions apply: NOTE The terms which are used in this standard, with reference to the definitions below, are indicated in figures 1 and 2. 3.1 rated load the loads for which the MCWP has been designed for in normal operation as stated in the load diagram 3.2 load diagram a notice displayed on the work platform showing the permitted number of persons and the weight and distribution of materials for the particular configuration 3.3 rated speed the vertical or horizontal speed for which the MCWP has been designed 3.4 transfer any horizontal movement of the MCWP from one position to another on the same working site 3.5 transfer condition the configuration of the MCWP in which the MCWP is moved from one position to another on the same working site and any limitation on the weather and the load or persons on the MCWP 3.6 transport any movement of the MCWP outside the boundaries of the working site 3.7 transport condition the configuration of the MCWP in which the MCWP is moved outside the boundaries of the working site (for example road transport) 3.8 transfer and transport interlocks any design features on the MCWP which prevent unsafe transfer or transportation 3.9 base frame the part of the MCWP which provides support for the mast and elevating assembly SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 7 3.10 chassis the part of the MCWP which provides mobility and support for the mast and elevating assembly 3.11 rail mounted chassis a chassis designed to transmit horizontal as well as vertical forces to the ground via rails 3.12 outriggers Supports at the base frame level used to maintain or increase the stability of the MCWP within specified conditions. They may also be used for levelling. 3.13 outrigger beam that part of an outrigger assembly which moves in a substantially horizontal plane and may be powered or operated manually 3.14 mast a structure that supports and guides the platform 3.15 mast, fixed length a mast whose length is fixed and cannot be varied, even by the attachment of further mast sections 3.16 mast, variable length a mast whose length can be varied by the attachment of successive lengths of prepared sections 3.17 guides the parts of the mast, which provide guiding for the work platform 3.18 mast tie the anchorage system used to provide lateral restraint to the mast from the building or other structure 3.19 work platform The vertical travelling part of the installation upon which the persons, equipment and materials are carried and from which work is carried out. This is as opposed to the MCWP, which refers to the whole of the installation, inter alia work platform, mast, mast ties, base and chassis. The work platform includes the main platform and any platform extension. 3.20 available platform area the area of the work platform measured at the work platform floor level 3.21 main platform that part of the work platform which is built up using primary structural elements 3.22 platform extensions those additional parts of the work platform which are built up using secondary structural elements, whose support and location is dependent upon the main platform. They are used to extend the main work platform, usually along its longitudinal working edge. They may form irregular shapes which conform to the work site. They may also extend at a level just above or below the main platform level. SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 8 3.23 multilevel work platforms multilevel work platforms consist of two or more work platforms travelling on the same mast or an additional working level attached to and totally supported by a work platform. (For illustration see annex B) 3.24 counter roller a roller used to counter – react the gear meshing separation forces between a rack and pinion 3.25 automatic brake a device to decelerate and stop moving parts in case of interruption of the power supply 3.26 buffer a resilient stop at the end of the travel, comprising a means of arresting using fluids, springs or similar means 3.27 overspeed any speed above rated speed 3.28 safety gear a mechanical device for stopping and maintaining the work platform stationary on the mast in the event of overspeed 3.29 overspeed governor a device which, when the work platform attains a predetermined speed above rated speed, causes the safety gear to be applied 3.30 competent person a person having such practical and theoretical knowledge and such experience of that MCWP as is necessary to carry out the function satisfactorily 3.31 user (user organisation) the person or organisation which has direct control over the MCWP use
SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 9
Figure 1 — Typical single mast MCWP
SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 10
Figure 2 — Typical twin mast MCWP
SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 11 4 List of hazards The list of hazards according to the following tables are based on #EN ISO 12100$ and Directive 89/392/EEC as amended by 91/368/EEC and 93/44/EEC. Tables 1.1, 1.2 and 1.3 show the hazards which have been identified and where the corresponding requirements have been formulated in this standard in order to limit the risk or reduce these hazards in each situation. A hazard which is not applicable or is not significant and for which, therefore, no requirements are formulated, is shown in the relevant clauses column as NA (not applicable).
SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 12 Table 1.1 — List of hazards (part 1)
HAZARDS RELEVANT CLAUSES IN THIS STANDARD
1
Mechanical hazards (caused for example by:
1.1 Crushing 5.2.1.3; 5.3.2; 5.4.1
1.2 Shearing 5.2.1.3; 5.3.2; 5.4.1
1.3 Cutting or severing 5.3.2; 5.4.1
1.4 Entanglement 5.4.1
1.5 Drawing-in or trapping 5.2.1.3; 5.3.2; 5.4.1
1.6 Impact 5.4.4
1.7 Stabbing or puncture NA
1.8 Friction or abrasion NA
1.9 High pressure fluid ejection 5.9.7; 5.9.8; 5.9.9; 5.9.10 1.10 Ejection of parts 5.2.1.4; 5.2.1.5 1.11 Loss of stability 5.1.5; 5.2.2.4; 5.2.2.5 1.12 Slip, trip and fall 5.2.2.1; 5.3.1
2 Electrical hazards
2.1 Electrical contact 5.8; 7.1.2.7 2.2 Electrostatic phenomena NA 2.3 Thermal radiation NA 2.4 External influences 5.7.15 Annex C
3 Thermal hazards Relevant but not dealt with
4 Hazards generated by noise Relevant but not dealt with
5 Hazards generated by vibration 5.1.2.3.2
6 Hazards generated by radiation NA
7 Hazards generated by materials and substances processed, used or exhausted by machinery:
7.1 Contact with or inhalation of harmful fluids, gases, mists, fumes and dusts 5.9
7.2 Fire or explosion NA
7.3 Biological and microbiological NA
8 Hazards generated by neglecting ergonomic principles in machine design:
(continued) SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 13 Table 1.1 — List of hazards (part 1) (concluded)
HAZARDS RELEVANT CLAUSES IN THIS STANDARD
8.1 Unhealthy postures or excessive efforts 5.2.1.6; 5.2.5.2; 5.6.2; 5.12; 5.12.8
8.2 Inadequate consideration of human hand/arm or foot/leg anatomy NA
8.4 Inadequate area lighting 7.1.2.6
8.5 Mental overload or underload, stress NA
8.6 Human error 5.2.2.1; 5.12
9 Hazard combinations
5.1.1.1; 5.1.1.2; 5.1.3
10 Hazards caused by failure of energy supply, breaking down of machinery parts and other functional disorders 5.1 10.1 Failure of energy supply 5.2.2.1; 5.6; 5.8.1.4; 5.12.7 10.2 Unexpected ejection of machine parts or fluids 5.9.7; 5.9.8; 5.9.9; 5.9.10 10.3 Failure or malfunction of control system 5.2.1.5 10.4 Errors of fitting 5.1.5.1.5 10.5 Overturn, unexpected loss of machine stability
5.1.1.2; 5.1.5; 5.7 11 Hazards caused by missing and/or incorrectly positioned safety related measures/means
8.3 Neglected use of personal protection equipment 5.12.8; 7.1.2.7; 7.1.2.12 11.1 Guards
11.2 Safety related (protection) devices 5.7 11.3 Starting and stopping devices 5.1.1; 5.3.4.9; 5.12 11.4 Safety signs and signals 5.2.2.7; 7.1.2.9 11.5 Information or warning devices 7.1.2.9 11.6 Energy supply disconnecting devices
5.2.1.2; 5.8.1.2 11.7 Emergency devices 5.5; 5.6 11.8 Feeding/removal means of workpieces
NA 11.9 Essential equipment and accessories for safe adjusting and/or maintaining 5.2.3.1; 5.4.2.10 11.10 Equipment evacuating gases NA
SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 14 Table 1.2 — List of hazards (part 2)
HAZARDS RELEVANT CLAUSES IN THIS STANDARD 12 Inadequate lighting of moving/working area (continued) 7.1.2.6 13 Hazards due to sudden movement instability etc during handling 5.1.5; 5.2.2.1; 5.2.2.3; 5.2.2.4; 5.4.3 14 Inadequate/non-ergonomic design of operating position
14.1 Hazards due to dangerous environments (contact with moving parts, exhaust gases etc) 5.2.2 14.2 Inadequate visibility from operators position 5.12.2; 5.12.5 14.3 Inadequate seat/seating NA 14.4 Inadequate/non-ergonomic design/positioning of controls5.12 14.5 Starting/moving of self-propelled machinery 5.12 14.6 Road traffic of self-propelled machinery 7.1.2.6; 7.1.2.12 14.7 Movement of pedestrian controlled machinery 7.1.2.6; 7.1.2.12 15 Mechanical hazards 5.1.1.1 15.1 Hazards to exposed persons due to uncontrolled movement 5.2.2.1; 5.2.4; 5.3.1.5, 5.4.1; 7.1.2.7 15.2 Hazards due to break-up and/or ejection of parts 5.2.1.4; 5.2.1.5; 5.2.2.3 15.3 Hazards due to rolling over (ROPS) 5.1.5 15.4 Hazards due to falling objects (FOPS) 7.1.2.7 15.5 Inadequate means of access 5.3.3; 5.3.4 15.6 Hazards due to towing, coupling, connecting, transmission etc 5.2.2.6 15.7 Hazards due to batteries, fire, emissions etc NA 16 Hazards due to lifting operations
16.1 Lack of stability 5.1.5; 5.1.1.2; 5.2.2.4; 5.2.2.5; 5.2.5.1 16.2 Derailment of machinery 5.2.2.4; 5.4.1.5; 5.4.2 16.3 Loss of mechanical strength of machinery and lifting accessories 5.1; 5.2.1.7; 5.2.1.8; 5.2.2.2; 5.2.2.3; 5.2.3.2; 5.2.3.3; 5.2.5.2; 5.2.5.3; 5.3.1.4; 5.4.2; 5.4.3 16.4 Hazards caused by uncontrolled movement 5.2.2.5; 5.2.4; 5.4.1; 5.11 17 Inadequate view of trajectories of the moving parts 5.12 18 Hazards caused by lightning 7.1.2 19 Hazards due to loading/overloading 5.7
SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 15 Table 1.3 — List of hazards (part 3) Hazards according to the second amendment to the Machinery Directive involving the lifting of persons by MCWP.
HAZARDS RELEVANT CLAUSES IN THIS STANDARD 20 Overloading or overcrowding of the carrier 5.1.2; 5.7; 5.10 Annex C 21 Unexpected movement of the carrier in response to external controls or other movements of the machine 5.12.7 22 Excess speed 5.4.1; 5.5; 5.6.3 23 Persons falling from the carrier 5.3 24 The carrier falling or overturning 5.2.2.3; 5.4.1; 5.5; 5.10; 5.11 25 Excess acceleration or braking of the carrier 5.2.2.4; 5.4.3.1.2; 5.4.4 26 Due to imprecise markings 5.2.2.7; 7.2
5 Safety requirements and/or measures 5.1 Structural and stability calculations 5.1.1 General 5.1.1.1 All loads and forces which can occur in any allowed configuration during erection, operation, out-of-service, dismantling and transfer shall be considered. This shall also include inclined or hanging masts. 5.1.1.2 The manufacturer shall be responsible for:  Stability calculations, in order to identify the various configurations of the MCWP and the combinations of loads and deflections, which together create conditions of instability;  Structural calculations, to evaluate the individual forces and to make allowance for deflections. All combinations of forces shall be considered including those which produce the most unfavourable stresses in the components. 5.1.2 Loads and forces The following loads and forces shall be taken into account: 5.1.2.1 Structural loads The masses of the components of the MCWP when they are not moving are considered to be static structural loads. The masses of the components of the MCWP when they are moving are considered to be dynamic structural loads. SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 16 5.1.2.2 Rated load 5.1.2.2.1 The rated load for design purposes is: m = (n × mp) + T + (2 x me) where m = rated load (kg)
mp = 80 kg; mass of each person
me = 40 kg; mass of personal equipment (for the first two persons only)
T = mass (kg) of material and equipment on the work platform (excluding personal equipment)
n = number of persons on the work platform The mass of persons and the mass of equipment and material shall act simultaneously. The minimum number of persons shall be: Two (2) for single mast platforms and four (4) for multiple mast platforms. The mass of the personal equipment (me) shall be assumed to act on the point coincident with each of the two persons which give the highest stresses. 5.1.2.2.2 The mass of each person is assumed to act as a point load on the MCWP at a horizontal distance 0,1 m from the upper inside edge of the top guard rail. The distance between the point loads shall be 0,5 m (see figure 3 as an example). 5.1.2.2.3 The mass T shall be evenly distributed over the whole area of the main platform giving a specific load per length t. The centre of gravity of the mass T shall be assumed to act on a point 0,15 B (where B is the width of the main platform) away from the longitudinal centre line of the main platform, on the side giving the highest stresses.
See figure 4. Calculations must allow for the possibility that a reduced load giving an unbalanced loadcase may result in higher stresses in some parts of the MCWP than a balanced rated load case would give. For single mast machines the bending moment, M, on masts and platforms shall be calculated according to formula 1, where Lmax is the greater of the distances L1 and L2 in figure 5. For multiple mast machines the bending moment M, on masts and platforms shall be calculated according to formulas 2, 3, 4 and figure 6. The factors 1,15 and 1,2 are used in the formulas 1, 2, 3, 4 in order to cover the situations in use where, instead of a uniformly distributed load, a concentration of the same load is placed elsewhere within that individual length. SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 17 Dimensions in metres
Figure 3 — Example of the distribution of persons on the main platform or platform extensions
Figure 4 — Eccentric loading normal to the centre line
SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 18
Specific load t = LT Formula (1): Mmax = 215,12max××Lt Figure 5 — Loading in the longitudinal direction. Single mast machines
Specific load t = LT Formulas: (2) M1 = 215,121××Lt (3) M2 = 82,122××Lt (4) M3 = 215,123××Lt Figure 6 — Loading in the longitudinal direction. Multiple mast machines SIST EN 1495:1999+A2:2010



EN 1495:1997+A2:2009 (E) 19 5.1.2.2.4 If the area of the main platform, or part of it, is increased by means of extensions, usually to the longitudinal edge of the platform, the mass of the number of persons allowed on the platform, according to 5.1.2.2.1, shall be assumed to act on these longitudinal edges according to 5.1.2.2.2. 5.1.2.2.5 In order to provide long cantilever extensions of restricted width to reach more distant work points an exception to 5.1.2.2.4 may be made, but shall be clearly explained on a sign easily visible on that particular extension to the main platform. In no such case shall the load on the extension be calculated for less than two persons (mp) carrying their personal equipment (me). In order to restrict the available platform extension area, such extensions shall not be more than 0,6 m wide. See Figure 7. ˜ Dimensions in metres
Key 1 main platform 2 platform-extension Figure 7 — Long cantilever extensions™ 5.1.2.2.6 Where the manufacturer includes in his design, provision for the use of a handling crane then the mass of
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