EN 1808:1999+A1:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sicherheitsanforderungen an hängende Personenaufnahmemittel - Berechnung, Standsicherheit, Bau - PrüfungenExigences de sécurité aux plates-formes suspendues à niveaux variables - Calculs, stabilité, construction - EssaisSafety requirements on Suspended Access Equipment - Design calculations, stability criteria, construction - Tests53.020.99Druga dvigalna opremaOther lifting equipmentICS:Ta slovenski standard je istoveten z:EN 1808:1999+A1:2010SIST EN 1808:2000+A1:2010en,fr,de01-oktober-2010SIST EN 1808:2000+A1:2010SLOVENSKI
STANDARDSIST EN 1808:20001DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1808:1999+A1
June 2010 ICS 53.020.99 Supersedes EN 1808:1999English Version
Safety requirements on Suspended Access Equipment - Design calculations, stability criteria, construction - Tests
Exigences de sécurité aux plates-formes suspendues à niveaux variables - Calculs, stabilité, construction - Essais Sicherheitsanforderungen an hängende Personenaufnahmemittel - Berechnung, Standsicherheit, Bau - Prüfungen This European Standard was approved by CEN on 19 February 1999 and includes Amendment 1 approved by CEN on 13 May 2010.
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, 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, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1808:1999+A1:2010: ESIST EN 1808:2000+A1:2010

Platform type tests. 69Annex B (normative)
Hoist and secondary device type tests . 74Annex C (normative)
Suspension rig type test . 80Annex D (normative)
Additional requirements . 82Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC"""" . 83Annex ZB (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""" . 84 SIST EN 1808:2000+A1:2010

!". 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 Directives, see informative Annexes ZA and ZB, which are integral parts of this document." 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, 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, Switzerland and United Kingdom.
1 Scope 1.1 Application This standard specifies the safety requirements for Suspended Access Equipment (SAE). It is applicable to both permanent and temporary equipment which may be powered or hand operated and which are defined in clause 3. 1.2 Hazards This European Standard deals with significant hazards pertinent to SAE, when they are used as intended and under the conditions foreseen by the manufacturer (See clause 4). This European standard specifies appropriate technical measures to eliminate or reduce risks arising from the significant hazards. 1.3 Exclusions The following are not covered: a) operation in severe conditions (e.g. extreme environmental conditions, corrosive environment, strong magnetic fields, etc.); b) operation subject to special rules (e.g. potentially explosive atmospheres, work on live lines); c) transportation of passengers from one level to another; d) handling of loads, the nature of which could lead to dangerous situations (e.g. molten metal, acids/bases, radioactive materials, brittle loads); e) hazards occuring when handling suspended loads in conjunction with the suspended platform; f) hazards occuring when used on public roads, over water, or wherever it is not possible to lower the platform to a safe position; g) hazards arising from wind pressure acting on loads having a surface area in excess of 2 m²; h) SAE using cableless control systems. The following applications for SAE are excluded from this standard:  Access to working areas with an incline in excess of 45° compared to the vertical;  Working platforms suspended by cranes;  Silo access equipment;  Access equipment using fibre ropes or chains for the suspension of the platform;  SAE intended to be used underground;  SAE powered by combustion engines;  SAE intended to be used in shafts. SIST EN 1808:2000+A1:2010

rated speed average speed measured during the upward and downward hoisting travel of the platform with its rated load for a travel length of 10 m or more and with the rated power supply applied 3.4.7
service brake mechanical brake, automatically applied by stored energy (e.g. spring force) until released with an external sustained power supply (electrically, hydraulically, pneumatically, etc.) under the control of the operator or automatically SIST EN 1808:2000+A1:2010

3.4.8
secondary device device intended to stop the descent of the platform under emergency conditions, e.g. breaking of a suspension wire rope or failure of a hoist 3.4.8.1 fall arrest device device acting directly on a secondary wire rope, which automatically stops and holds the platform 3.4.8.2 secondary brake brake acting directly on the drum, traction sheave, or final drive shaft, intended to stop the descent of the platform 3.4.9 anti-tilt device device which detects when the longitudinal slope of the platform exceeds a pre-set angle 3.4.10
no-power descent manually operated system that allows controlled descent of a power operated platform 3.4.11
manual lever/wheel/handle device on the hoist which allows the platform to be lifted or lowered manually 3.4.12
wire rope winder storage drum onto which wire rope is reeled 3.4.13
cable reeler storage drum onto which electric cable is reeled 3.4.14
hoist operation cycle (for test purposes only) one cycle shall consist of lifting and lowering over a minimum vertical distance. This distance being where either:  the wire rope passes through all wire rope related parts of the traction hoist and its pulleys and reeler system, or  the wire rope passes through four turns around the drum hoist and its related pulleys 3.4.15
platform-mounted hoist hoist which is mounted on the platform 3.4.16
roof-mounted hoist hoist which is mounted on the suspension rig or trolley 3.4.17
overload detection device device which trips and acts automatically to stop the upward motion of a platform if the load in the suspension wire rope(s) reach(es) the tripping limit SIST EN 1808:2000+A1:2010

tripping limit static load which causes the overload detection device to operate 3.5 Suspended platforms 3.5.1 suspended platform that portion of the assembly designed to carry persons and their equipment 3.5.1.1
single point suspended platform platform which incorporates 1 anchor point 3.5.1.2
double point suspended platform platform which incorporates 2 anchor points 3.5.1.3
multi-point suspended platform platform which incorporates 3 or more anchor points and which is not hinged 3.5.1.4
hinged continuous platform long platform which incorporates more than 2 anchor points having articulated sections to ensure tension in each suspension wire rope 3.5.1.5
multi-deck suspended platform platform made up of 2 or more decks, connected vertically (See Figure 17) 3.5.1.6
suspended chair chair which incorporates one anchor point, for one person to use 3.5.1.7
cantilevered platform:
platform where the deck extends beyond the anchor point 3.5.2
restraint system system attaching the suspended platform to the mullions or other fixtures on the building and which limits the lateral movement of the suspended platform due to the wind 3.5.3
suspension wire rope restraint system vertical series of plugs on the building, each with a lanyard and end ring which is fitted to the suspension ropes on descent and removed on lifting (See Figure 19) 3.5.4
anchor point point provided on the platform or chair for the independent attachment of the hoist(s)/suspension rope(s) and secondary rope(s)/fall arrest device(s) SIST EN 1808:2000+A1:2010

3.6 Loads 3.6.1
total suspended load (TSL) static force imposed on the suspension point(s), consisting of the rated load of the platform, the self-weight of the platform, the ancillary equipment, the wire ropes and the electric cable, if any 3.6.2
rated load (RL) maximum mass which the suspended platform has been designed to carry as designed by the manufacturer. The rated load comprises persons and equipment 3.6.3
working load limit (WLL) maximum load which a piece of equipment is authorised to sustain as designed by the manufacturer. The WLL is specified by the manufacturer 3.6.4
working coefficient arithmetic ratio between the load guaranteed by the manufacturer up to which a piece of equipment or the SAE, is able to hold it and the WLL marked on a piece of equipment or SAE 3.6.5
test coefficient arithmetic ratio between the load used to carry out the static or dynamic tests on a SAE or a piece of equipment, and the WLL marked on the SAE or a piece of equipment 3.6.6
static test Test during which the SAE or a piece of equipment is first inspected and then subjected to a force corresponding to the WLL multiplied by the appropriate static test coefficient and then re-inspected once the said load has been released to ensure no damage has occurred 3.6.7
dynamic test test during which the SAE is operated in all its possible configurations at WLL with account being taken of the dynamic behaviour of the SAE in order to check that the SAE and safety features are functioning properly 3.7 Steel wire ropes 3.7.1
calculated coefficient ratio between the guaranteed breaking load of a steel wire rope and the maximum static force that shall be applied to that rope 3.7.2
guaranteed breaking load breaking load of a steel wire rope guaranteed by the manufacturer 3.7.3
suspension rope active steel wire rope carrying the suspended load SIST EN 1808:2000+A1:2010

3.7.4
secondary rope steel wire rope not normally carrying the suspended load but rigged in conjunction with a fall arrest device 3.7.5
single active rope suspension system two steel wire ropes attached to a suspension point, one rope being the suspension rope and the other rope being the secondary rope 3.7.6
double active rope suspension system two steel wire ropes attached to a suspension point and each carrying part of the suspended load 3.8 Suspension rig 3.8.1
suspension rig that portion of the equipment from which the platform is suspended (excluding the track system) 3.8.2
trolley unit suspension rig mounted on wheels which is capable of traversing 3.8.3
suspension point designated area provided on the suspension rig assembly for the independent attachment of the suspension and secondary wire ropes, diverter pulleys or hoists 3.8.4
fulcrum pivoting point or line about which the balancing moments of the suspension rig are calculated 3.8.5
stability coefficient coefficient by which the overturning moment is multiplied 3.8.6
inboard portion that portion of the suspension rig which is on the building side of the fulcrum 3.8.7
outboard portion that portion of the suspension rig which projects from the fulcrum over the edge of the building 3.8.8
counterweights weights which are attached to the suspension rig to counterbalance the overturning moment 3.8.9
counterweighted suspension beam static beam where the stability is assured by counterweights 3.8.10
mechanically anchored suspension rig structure where the stability is assured by a mechanical anchor SIST EN 1808:2000+A1:2010

3.8.11
stationary suspension rig structure which is positioned and fixed before suspending the platform 3.8.12
parapet clamp structure attached to the roof parapet and dependent on the parapet for location and anchorage 3.8.13
davit structure anchored to the roof (See Figure 12) 3.8.14
rail track rails normally installed at roof level to support and guide a trolley unit 3.8.15
guide rail rail normally installed at roof level to guide a trolley unit 3.8.16
monorail track track normally fixed along the perimeter of a building at roof level to support and guide a traversing trolley 3.8.17
traversing trolley wheeled block designed to run on a monorail track, used to suspend a platform below the monorail and to incorporate a traversing system for the platform 3.8.18
lifting all operations which move a platform to a higher level 3.8.19
lowering all operations which move a platform to a lower level 3.8.20
platform rotation circular movement of the platform about its vertical axis passing through the platform itself 3.8.21
suspension rig slewing circular horizontal movement of the suspension rig about a vertical axis 3.8.22
traversing longitudinal movement of a suspension rig 3.8.23
luffing rotational movement of the jib(s) about a horizontal axis to allow positioning of the platform 3.8.24
jib telescoping movement to extend or retract a jib SIST EN 1808:2000+A1:2010

jib slewing circular movement of the jib relative to the suspension rig
1 = Trolley unit 2 = Monorail track 3 = Traversing trolley 7 = Counterweighted suspension beam 4 = Single point suspended platform 8 = Suspended platform 5 = Traversing trolley 9 = Parapet clamp 6 = Fixed davit 10 = Suspended chair
Typical BMU Typical TSP Figure 1 — Example of different types of SAE
12341234AB 1 = Luffing jib 3 = Suspended platform 2 = Pulley 4 = Anticollision device A = on rails, B = on concrete track Figure 2 — Example of trolley unit (power operated)
1 =
Secondary wire rope 7 = Rear guard rail
2 = Suspension wire rope 8 = Intermediate guard rail
3 = Fall arrest device 9 = Toe guard
4 = Traction hoist 10 = Decking
5 = Front guard rail 11 = Vertical member 6 = Stirrup 12 = Stabilizing device Figure 3 — Example of typical TSP platform
2 = Single point suspended platform 1 = Suspended chair Figure 4 — Example of typical single point suspended platform and suspended chair
Area exposed to wind
(m²) a
Deflection of the platform under load
(mm) B
Width of the platform
(m) b
Residual deflection of the platform
(mm) BMU
Building Maintenance Unit
(-) c
Shape factor
(-) Cwr
Working coefficient for suspension rig
(-) D
Pitch diameter on pulley or drum hoist
(mm) d
Nominal diameter of wire rope
(mm) F
Force
(N) Fh
Horizontal force
(N) Fo
Minimum guaranteed breaking load of wire rope
(N) Fv
Vertical force
(N) Fs
Shearing force
(N) Fw1
Wind force in service
(N) Fw2
Wind force out of service
(N) H
Pitch ratio
(-) L
Length of platform
(m) Lb
Distance between fulcrum and the point where the selfweight of the suspension rig acts
(m) Lc
Length of cantilevered section of platform
(m) Lf
Free span of guard rail between two vertical members
(m) Li
Length of inboard portion of suspension rig
(m) Lo
Length of outboard portion of suspension rig
(m) Lpi/Lpo
Horizontal projection between the fulcrum line and the point where SWP/W acts
(m) Ls
Distance between the bolts or supports which withstand the overturning moment
(m) Lmi/Lmo/ Horizontal projection between the fulcrum Ls1/LW
and the point where SL, Mi, Mo and Fw act
(m) SIST EN 1808:2000+A1:2010
Mass of electric cable
(kg) Me
The minimum weight of personal equipment
(kg) Mi
Mass of inboard portion of suspension rig
(kg) Mm
Mass of material on work platform
(kg) Mo
Mass of outboard portion of suspension rig
(kg) Mp
Assumed mass of a person
(kg) Mw
Mass of the counterweights
(kg) Mwr
Mass of wire ropes when the platform is completely lowered (kg) n
Number of persons on the platform
(-) Nr
Number of steel wire ropes or falls supporting the platform
(-) q
Wind pressure
(N/m²) Ra
Standard of smoothness
(µm) RF
Minimum load capacity of platform deck
(kg/m²) Rh
Horizontal support reaction on suspension rig
(N) RL
Platform Rated Load
(kg) Rv
Vertical support reaction on suspension rig
(N) S
Maximum static force in the wire rope
(N) Sa
Surface of deck
(m²) SAE
Suspended Access Equipment
(-) Sd
Shock load coefficient
(-) SWR
Mass of suspension rig
(kg) SWP
Mass of the platform
(kg) T
Length over which the load is distributed
(m) Tm
Maximum traction force in the wire rope
(N) TSL
Total suspended load
(kg) TSP
Temporary Suspended Platform
(-) v
Wind speed
(m/s) W
Save working load on the cantilevered deck
(kg) WLL
Working Load Limit
(kg) SIST EN 1808:2000+A1:2010

Dynamic test load
(kg) Wts
Static test load
(kg) Zp
Calculated coefficient of steel wire rope
() σ E
Elastic yield limit
(N/mm²) σ R
Breaking limit
(N/mm²) σ a
Allowable stress
(N/mm²) vE
Safety coefficient compared to elastic yield limit
(-) vR
Safety coefficient compared to breaking limit
(-) 4 List of hazards This chapter contains hazards and hazardous situations, identified by risk assessments significant for SAE and which require action to eliminate or reduce risk. A hazard which is not relevant (NR), is not significant (NS) or not dealt with (ND) is shown in the corresponding requirements column of Table 1. Table 1 — List of hazards Line No. HAZARDS Relevant clauses in this standard 1 Mechanical hazards
1.1 Generated by machine parts or workpieces caused by
1.1.1 Shape 0, 9.3.1 1.1.2 Mass and stability (potential energy of elements which may move under the effect of gravity) See Line 27.1.1 of this table 1.1.3 Inadequacy of mechanical strength See Line 27.4 of this table 1.2 Accumulation of energy inside the machinery caused by
1.2.1 Elastic elements (springs) loaded wire rope winder 14.7 1.2.2 Liquid and gases under pressure 10.2 1.3 Elementary forms of mechanical hazards
1.3.1 Crushing hazard due to lack of clearance 9.2.1.5 1.3.2 Shearing hazard 8.1.4, 8.10.6 1.3.3 Cutting or severing hazard 8.1.4, 8.10.6 1.3.4 Entanglement hazard 8.1.4 1.3.5 Drawing in or trapping hazard 8.3.4 1.3.6 Impact hazards due to swinging of the platform against the facade 7.7, 7.8 1.3.7 Stabbing or puncture hazard NS SIST EN 1808:2000+A1:2010

2.1 Contact of persons with live parts (direct contact) shall be considered in relation to the degree of protection 10.1.5 2.2 Contact of persons with parts which have become live under faulty conditions (indirect contact) shall be considered in relation to: main power supply protection continuity of the protective bonding circuit
10.1.2 14.4 2.3 Approach to live parts under high voltage ND 2.4 Electrostatic phenomena NR 2.5 Thermal radiation or other phenomena such as the projection of molten particles and chemical effects from short circuits, overloads, etc.
NS 3 Thermal hazards resulting in: burns by a possible contact of persons
NS 4 Hazard generated by noise 9.1.4.1 5 Hazard generated by vibration NS 6 Hazard generated by radiation ND 7 Hazard generated by materials and substances ND 8 Hazard generated by neglecting ergonomic principles in machinery design as hazards from
8.1 Unhealthy postures or excessive effort: minimum free height maximum force applied to a crank or lever maximum weight of portable components
7.6.3, 7.5.2 8.2.2, 8.2.3 9.3.2, 9.3.4 8.2 Inadequate consideration of hand-arm or foot-leg anatomy: platform dimensions
7.1 8.3 Neglected use of personal protection equipment 14.6 8.4 Inadequate local lighting 14.6 8.5 Mental overload and underload stress 14.6 8.6 Human error, human behaviour unintentional command by the operator
assembly of modular platforms using fool-proof connections 11.2 11.1, 11.3, 11.4 11.5 7.2.1 9 Combination of hazards ND SIST EN 1808:2000+A1:2010

10.1 Failure/disorder of the control system may result: in being trapped on the platform in unintentional movement
11.8 11.8 10.2 Restoration of energy supply after interruption 11.8 10.3 External influences on electrical equipment 10.1.5, 11.8 10.4 Other external influences Annex D 10.5 Error in the software 11.8 10.6 Errors made by the operator (due to mismatch of machinery with human characteristics and ability)
NR 11 Impossibility of stopping the machine in the best possible condition 8.1.6, 8.3.2, 11.1 11.6, 11.8 12 Variations in the rotational speed of tools NR 13 Failure of the power supply 8.3.4, 9.2.2.2 14 Failure of the control circuit 11.8 15 Errors of fitting 7.2.1, 14.4 16 Break-up during operation 11.8, 14.6 17 Falling or ejected objects or fluid 7.1 18 Loss of stability/overturning of machinery See Line 27.1.1 of this table 19 Slip, trip and fall of persons See Line 27.2 of this table
Additional hazards and hazardous events due to mobility
20 Relating to the travelling function
20.1 Excessive speed of pedestrian controlled machinery 9.2.1.6.1 20.2 Excessive oscillation of platform when moving 9.2.1.6.1, 9.2.1.7, 9.2.1.8.1 20.3 Insufficient ability of machinery to be slowed down, stopped and immobilised 8.1.6, 8.3.2, 8.3.3, 9.2.1.6.2, 9.2.1.8.2 21 Linked to work position
21.1 Fall of persons during access to the work position 9.2.2.2, 9.2.3.2 21.2 Mechanical hazards at the work position: contact with the wheels contact of persons with machine pedestrian controlled machines
9.2.1.5 9.2.1.6.4 9.2.1.6.3 21.3 Insufficient visibility from work position ND 21.4 Inadequate seating 7.6 SIST EN 1808:2000+A1:2010

22.1 Inadequate location of controls/control devices 11.4 23 From handling the machine, lack of stability 14.3 24 Due to the power source and to the transmission of power
24.1 Hazards from the batteries 9.1.4.3 25 From/to third persons
25.1 Unauthorised start up/use 9.3.3.2, 11.4, 14.6 25.2 Lack or inadequacy of visual or acoustic warning means 8.3.5.7, 9.2.1.6.3, 13 26 Insufficient instructions for the operator 14.6
Additional hazards and hazardous events due to lifting
27 Mechanical hazards and hazardous events
27.1 Hazards due to falling caused by:
27.1.1 Lack of stability due to: - an excess of overhang - an insufficient quantity of counterweights - counterweights not properly located and fixed - insufficient strength of building structure
13.2.5 6.5 9.2.1.9, 9.3.3.2 14.4 27.1.2 Uncontrolled loading - overloading - overturning moments exceeded due to: - unknown weight of load - underhooking of the platform - interaction of two or more hoists with unequal
load distribution on platform - load self-oscillation in the rope by rapid
switching of UP/DOWN controls
8.3.5 27.1.3 Uncontrolled amplitude of movements 8.3.10, 9.1.1 27.1.4 Unexpected/unintended movements of loads 8.9.1 27.1.5 Inadequate holding devices /accessories 8.1.6, 8.3.2, 8.3.3 27.2 From lifting of persons, and hazards due to falling shall be considered in relation to:
27.2.1 Decking, sides guard rails and toe boards of platform 7.1, 7.4, 7.6 27.2.2 Control of the platform level 8.3.8, 8.9.3 27.2.3 Safe access to the platform 7.4, 9.2.3.2 27.2.4 Safe access to the wire rope anchorage points 9.2.3.3 27.2.5 Falling objects from the platform 7.1, 7.2.3 27.3 From derailment 9.2.1 27.4 From insufficient mechanical strength of parts 6 27.5 From inadequate design of pulleys, hoists 8 27.6 From inadequate selection/integration into the machine of 6.6, 6.8 SIST EN 1808:2000+A1:2010

14.2, 14.4 27.9 From load-person interference (impact by load counterweight) 8.1.2, 9.3.3.2 28 Electrical hazard
28.1 From lightning 14.2 29 Hazards generated by neglecting ergonomic principles See Line 8.1 of this table 29.1 Insufficient visibility for the operator NS 5 Safety requirements and/or measures The SAE shall meet the requirements detailed in clauses 6 to 14. !In addition, machines shall comply, as appropriate, with EN ISO 12100-1 and EN ISO 12100-2 for hazards which are not covered by this European Standard." 6 Structural, stability and mechanical calculations 6.1 General The calculations shall be carried out in accordance with the accepted calculation codes and engineering practices including if necessary the effect of the elastic deformations. All failure modes of the material shall be considered including fatigue and wear. In the absence of a harmonised standard, relevant FEM rules for the method of calculation of lifting equipment are referred to. The load cases are specified in this standard: FEM 9.511 Classification of Mechanisms; FEM 9.341 Local girder stresses; FEM 1.001, booklet 2. Classification and loading on structures and mechanisms; FEM 1.001, booklet 3. Calculating the stresses in structures; FEM 1.001, booklet 4. Checking for fatigue and choice of mechanism components. The design calculations shall be carried out in accordance with the permissible stress method and if the limit state method is used it shall result in the same level of safety. 6.2 Safety margin allowed within the calculation 6.2.1 Calculating the stresses in structures See also FEM 1.001 booklet 3. For the 3 load cases defined in Table 2, the calculation of the different members is set out, allowing a safety margin for the critical stresses, taking the 3 failure modes into account: SIST EN 1808:2000+A1:2010

Load case 1 Load case 2 Load case 3 Value of νE 1,5 1,33 1 Allowable stress σa σE / 1,5 σE / 1,33 σE
Load case 1: in service conditions, SAE with RL, affected by wind. Load case 2: under occasional conditions e.g. static and dynamic tests, tripping of overload detection device. Load case 3: under extreme conditions e.g. operation of the secondary device, out of service wind. 6.2.1.2 Checks against fatigue For structures subject to fatigue, the conventional number of cycles and load spectrum to take into account are set out in Table 3. Table 3 — Parameters for checking against fatigue Type of SAE Number of loading cycles Load spectrum TSP 30.000 (U1) Q3 BMU 60.000 (U2) Q4
6.2.2 Calculating the stress in mechanisms Mechanical parts are calculated by checking that they have a sufficient safety margin compared to the failure modes arising from breaking, buckling, fatigue and wear. 6.2.2.1 Check against breaking Verifying the mechanical parts against breaking are carried out by checking that the calculated stress does not exceed the allowable stress taking into account the breaking stress of the material used. The value of the allowable stress σa is given in the following formula: SIST EN 1808:2000+A1:2010

Load case 1 Load case 2 Load case 3 Value of νR 4 2.2 1.5 Allowable stress σR/4 σR/2.2 σR/1.5
6.2.2.2 Checks against fatigue and wear For mechanical parts subject to fatigue, the conventional number of cycles and load spectrum to take into account are set out in Table 5. Table 5 — Parameters for checks against fatigue and wear Type of SAE Number of loading cycles Total operating time (hours) Load spectrum TSP 30.000 2000 (T4) L3 BMU 60.000 4000 (T5) L4
6.3 Design loads and forces 6.3.1 General The rated load (RL) of the platform and the maximum number of persons on the platform are to be stated by the manufacturer. Since TSPs are modular equipment the WLL of the suspension rig and its accessories shall be equal to or greater than the WLL of the hoist(s) which shall be equal to or greater than the reactions transmitted by the suspended platform. There shall be compatibility between the WLL of the hoist(s) and the loading range of the platform. NOTE For purposes of calculations of SAE covered by this standard it is considered that a mass of 1 kg produces a force of 10 N 6.3.2 Rated load on the platform 6.3.2.1 Platform for one person: RL = Mp + Me + Mm
. . . (1) Platform for two or more persons: RL = (n x Mp) + (2 x Me) + Mm
. . . (2) SIST EN 1808:2000+A1:2010

6.3.2.3 The RL is calculated according to formula (1) or (2) and distributed over a surface Sa, located on a length T SaBT=× . . . (1) TRLBRF=× . . . (2) 6.3.2.4 Single point suspended platform/chair. The minimum RL shall be 120 kg. 6.3.2.5 Two point suspended platform 6.3.2.5.1 To prove the strength of the platform, the RL, distributed over a length T, shall be applied in the most unfavourable position. 6.3.2.5.2 If a two point suspended platform extends beyond an anchor point, a stability coefficient against overturning of 2,0 shall be applied in the platform design to provide adequate stability, where the load is located on the cantilevered section.
125 14 Restrained platform
250 20
NOTE For shape factors applied to areas exposed to wind, refer to FEM 1.001, booklet 2 6.3.3.1 The full area of one person is 0,7 m² with the centre of area 1,0 m above the platform floor. 6.3.3.2 The exposed area of one person standing on a work platform behind an imperforate section of fencing 1 m high is 0,35 m² with the centre of area 1,45 m above the platform floor. The assumed exposed surface area of material on the platform is 2 m². 6.3.3.3 Wind loads are assumed to act horizontally at the centre of the area of the different parts of a SAE. 6.3.3.4 The wind load acting on the platform shall be considered as acting on the suspension points. 6.3.3.5 For BMU, an additional calculation is needed for storm wind forces, with the machinery in the parked position. Table 7 — Storm wind Intended height above ground(m) Wind speed v (m/s) Wind pressure q (N/m²) 0 to 20 36 800
20 to 100 42 1100
100 to 150 46 1300
150 to be considered according to local conditions
6.3.3.6 Calculations shall be made to demonstrate that a suspension rig cannot be moved by wind forces, whether in service or in the parked position. This check is done by assuming a friction coefficient of the wheels with the brake applied equal to 0,14 and a movement resistance with the brakes not applied equal to 10 N/kN for wheels with bearings and to 15 N/kN for wheels with bushes. When the trolley can be moved by wind forces, an anchoring device shall be provided. For the calculation of the clamps, a friction coefficient between the clamp and the rail is equal to 0,25. 6.3.4 Forces exerted by persons 6.3.4.1 The minimum value for the forces exerted by persons on the guard rails or top edge of a rigid side is assumed to be 200 N for each of the first two persons on the platform and 100 N for each additional person acting in the horizontal direction at 500 mm intervals. 6.3.4.2 The guard-rail or top edge of a rigid side shall be able to resist without permanent deflection a vertical load of 1 kN located in the most unfavourable position. SIST EN 1808:2000+A1:2010
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