Effects on lift products by EN81-1/2 re-drafting EN 81-20 / 50 Revision.

Effects on lift products by EN81-1/2 re-draftingEffects on lift products by EN81-1/2 re-drafting

EN 81-20 / 50 Revision EN 81-20 / 50 Revision

ContentsContents

Text marked in blue is foreseen to effect the manufacturers

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Text marked in green is foreseen as effecting the selling company as information which may be needed to be provided to others

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GeneralGeneral

The revision of EN81 Parts 1 & 2 to become EN81 Parts 20 and 50 will be the greatest change to the lift design code in the last 20 years.

As such it contains many changes which will effect product in both its manufacture and certification.

This document gives a brief overview of the anticipated changes to the lifts design and how this might effect our standard product as manufactured within our European factories and as sold by the various selling entities.

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Warning !Warning !

This presentation only shows what has been agreed so far by CEN/TC10/WG1.

Nothing has as yet been approved by the National Standards Bodies.

Therefore persons should not take the content of this presentation as a means to start to change their product or even to consider that all of the content will be approved.

This presentation only shows some of the major changes. There are many other alterations to the previous EN 81-1 an EN 81-2 requirements.

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Assumptions,Assumptions,Scope, Definitions and Scope, Definitions and

EN414EN414

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AssumptionsAssumptions

There is a modified assumption regarding the horizontal forces which might be expected to be exerted by a person.

300 N under normal conditions 1000 N for impact (person falling against) unless specifically specified

elsewhere in the standard. This may result in designs needing to be checked against these forces.

Requirement to discuss with the user the type of device used for loading and unloading the lift.

It is now assumed that all Hydraulic fluid used complies with ISO 6743-4. (specification for hydraulic oils)

The machinery spaces containing hydraulic equipment are designed such that they will contain any spilt fluids.

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AssumptionsAssumptions

Requirements to ventilate the well and machinery spaces have been moved to the assumptions with then a large section of text in the new informative annex to give some guidance on this subject.

Therefore the responsibility to ventilate the well, with information provided by the lift installer, becomes the responsibility of the building designer/architect.

This is due to the wide coverage of the subject in National Building regulations which would otherwise conflict with the requirements of the new standards.

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ScopeScope

Only change from EN81-1/2 + A3 is to exclude all hydraulic product where the setting of the relief valve is greater than 500 Mpa.

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DefinitionsDefinitions

New definitions are given for :-

Authorized persons Competent persons Maintenance Rescue Operations Special Tools

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EN414 RequirementsEN414 Requirements

A new table is given for significant hazards accounted for in the standard using the list found in EN 14121-1, in accordance with the new EN 414 layout of the standard.

Due to this standard, all the clauses previously numbered from 5 to 16 will now be covered in a new Clause 5.This will mean nearly all clauses are renumbered from those that exist today.

In addition some chapters will be split to make them easier to understand.

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The WellThe Well

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The wellThe well

Where there is more than 11m between consecutive floors there is now an option to have :

Intermediate emergency doors. Adjacent lift cars with emergency doors Electrical emergency operation.

Glass panels used in the construction of the well must be able to withstand 300 N applied over an area of 0.3m x 0.3m.

Where there are accessible spaces under the pit and a suitable pier is used as a means of protecting against a falling counterweight, the kinetic energy forces must be communicated to the builder.

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The well The well (continued)(continued)

Protection in the well:

New requirements changing the dimensions of counterweight screens and a requirement to withstand 300 N without deflecting into the path of the counterweight.

The requirement for shaft division screens has now been changed from 500mm from the side of the car to the nearest moving part, to 500mm from the handrail to the nearest moving part.

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Headroom and Pit Safety Spaces

There must be standing areas for the number of persons anticipated to work on the car and in the pit and clear signage stating how many persons are permitted to work there.

Each person must have their own safety space available.

Areas which are not safe must be marked with black and yellow stripes.

Clearance over fixed equipment increased to 500mm with exception of the handrail

Handrails to have 400mm horizontal clearance to items outside the projected area of the car.

New requirements for clearances around guide rails for the pit.

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≥ 0,30 + 0,035 v²(within 0,40 m)

≥ 0,50 + 0,035 v²

Highest parts installed on the car roof

≥ 0,50 + 0,035 v2

Lift car

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New requirements for pit access ladders and to provide them with a safety contact where necessary.

Normative text in clause 5, combined with a new normative annex giving the possible ladder types.

“Movable” ladder fastened (1) in the pit and can be placed in climbing position (2).

CHAIN OR ROPE FOR PREVENTING REMOVAL FROM THE PIT

1,

10 m

Fixation of ladder feet for preventing tripping over

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2

1

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Clearances around guide rails :

Further guidance has been given for the reduction in clearances in the pit between fixed parts and the lift car within a certain distance of the guide rails.

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New requirement for a pit inspection control station.

This shall be interlocked with the one on the car roof to prevent confusion between which device takes priority.

In the event of persons on the car roof and in the pit the car shall only move when the same button is pressed on both units.i.e. to move the car up the “UP” button must be pressed simultaneously on both control stations.

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Alarm for trapped persons.

The alarm initiation device to call for assistance in the event that a person has become entrapped in the well is now clearly stated to be in conformity to EN81-28.

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MachineryMachinerySpacesSpaces

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Machinery SpacesMachinery Spaces

Machine rooms shall not be used for purposes other than lifts. They shall not contain ducts, cables or devices other than for the lift.

New rules with regard to differences in floor levels and gaps in floors resulting in the possible need for additional ladders and barriers.

Modified rules for lighting levels in machinery spaces :

200 lux where work is carried out and for movement between work areas.

New rules for guarding of pulleys in the well and the ability to access them in safety for maintenance.

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Machinery SpacesMachinery Spaces

Where work is required to be carried out from the car roof and the position is assured by fixed mechanical devices, where these cannot be disengaged under loss of power due to the forces applied to the car a means of escape must be assured.

Exit via a space between car roof and underside of landing door

Exit via the car through a trapdoor Exit via an emergency door in the well.

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Landing & Car EntrancesLanding & Car Entrances

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Landing / Car DoorsLanding / Car Doors

The clauses for landing and car doors have been combined

All fire test certification of lift landing doors shall be to EN81-58.

All doors in future, including their frame, will be subject to soft and hard pendulum impact testing at their weakest points. The details of the tests will be found in EN81-50.

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Landing / Car DoorsLanding / Car Doors

New requirements for strength / forces :

1000 N force applied over an area of 100cm2 shall cause no permanent damage.

Retaining devices are to be provided should the main guiding elements fail, and these also to be impact tested.

New requirement for non contact protection device if door force is over 4 J.

New requirement to remove lift from service or lower door force to 4 J should detecting device fail. Also audible warning in this mode.

New requirement for 1000 N and 300 N forces to act simultaneously for design and test purposes.

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Landing / Car Doors Landing / Car Doors (continued)(continued)

New design requirements :

New requirements for protection of children's fingers on glass doors.

• Making the glass opaque on the side exposed to the user by the use of either frosted glass or the application of frosted material to a height of minimum 1,10 m;

• Sensing the presence of fingers at least up to 1,6 m above sill and stopping the door movement in opening direction;

• Limiting the gap between door panels and frame to maximum 4 mm at least up to 1,6 m above sill. Recesses (framed glass, etc.) shall not exceed 1 mm. The maximum radius on the outer edge of the frame adjacent to the door panel shall not be more than 4 mm.

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Car door not to be able to be opened more than 100mm under manual effort when outside of unlocking zone.

New requirements for fire/smoke labyrinth design on closing edges of doors and frames.

Door leading edge not to be less than 20mm thick if made from glass.

New extra contact on swing doors.

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If lowest landing door lock is not within 1m of pit access ladder a means to be provided to unlock the doors from the pit.

New rules for the maximum height of the unlocking mechanism from the landing floor, depending if in the vertical or horizontal plane.

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Lift CarLift Car

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Lift CarLift Car

Car Loading: Load will continue to be calculated at 75kg per person.

Car area to be calculated as from wall to wall body inner dimensions. Finishes are excluded.

Areas which cannot accommodate a person due to their size need not be included in the floor area calculation.

Door entrance recesses of less than 100mm depth need not be included in the floor area calculation.

A new sample calculation, including loading devices is given.

New requirement for combustibility of car materials to EN13501-1.

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Lift CarLift Car


Loads to test for permanent deflection to now be applied from outside and inside the car.

New requirements for car to car rescue and the provision of a portable bridge.

Surface of car roof where persons work to be made from non-slip material.

Modified requirements for normal car lighting and emergency lighting lux levels.

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Lift CarLift Car


New requirement for the car apron• Must withstand a horizontal force of 300N without

deflection greater that 25mm.

New requirements for the balustrade.

• All lift cars regardless of well clearances to have a “toe board” around the car roof edge.

• New requirements for the use of 1100mm high balustrades

• Must also withstand horizontal force of 300N32

Lift CarLift Car

≤ 150≤ 150

> 300

300

No balustrade required but needs toe board 100mm

Required balustradeHeight ≥ 700 mm

500

700> 300

> 500

Required balustradeHeight ≥ 1100 mm

1100

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SuspensionSuspension

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Means of suspensionMeans of suspension

All ropes to be to EN12385-5 (Harmonized under Lift Directive)

No longer possible to use rope grips as a means of rope termination. Terminations shall be to EN 13411-3, 6 or 7.

Rope traction Either ropes shall slip if car or counterweight is

blocked, or Drive system to limit motor torque.

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Where there is relative extension of one rope to all others the lift is to stop at next floor.

New requirements for compensation means dependant on lift speed. (tension device required above 3 m/s)

Clarification of requirements for rope retainers, anti- rebound devices and tensioners

The calculations given in annex M will be move to EN 81-50. These have been modified slightly from those in the present standard.

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Guarding & Retainers

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No new technologies such as belts or alternative forms of ropes have been incorporated at this time.

This is due to concerns over the inclusion of patented or copyright protected materials.

It is however likely that future revisions would include such materials.

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Overspeed, Overspeed, Safety Gear & Safety Gear & Unintended Unintended MovementMovement

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Deceleration RatesDeceleration Rates

After much discussion the decision was taken not to make any proposals to change deceleration rates of safety gear and buffers in the new standards.

Instead CEN/TC10 will work with ISO/TC178 to elaborate global requirements for safety gear, buffers and emergency electrical stops, which may then be incorporated in all lift standards throughout the world.

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DeletionsDeletions

The following items are now deleted :

All references to instantaneous safety gear with buffered effect.

All references to energy accumulation buffers with buffered return movement

• Neither of these devices were found to be used by manufactures.

All references to Hydraulic clamping devices. References to “fly ball” speed governors.

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Hydraulic Pawl DevicesHydraulic Pawl Devices

All Pawls devices must be electronically verified in both their active and retracted positions.

Where the pawl device is detected as not having achieved its active position the lift to be returned to the ground floor and removed from service.

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Uncontrolled MovementUncontrolled Movement

Distances between from wall and car sill when car is below the floor have been changed to a diagonal

200

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Guide RailsGuide Rails

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Some small modifications to the guide rail calculations.

Tensile strength used in the calculations should be given by the guide rail manufacturer.

Where the lift travel is greater than 40 m the guide rail buckling shall include any forces imparted on the rails by the guide brackets due to settlement joints in the building structure.

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Annex G

This annex giving example calculations will now become part of EN 81-50.

It will continue to give examples based on the Omega method but will also state that other methods of calculation are permissible

Eurocode 3 Finite Element Analysis

In any case the requirements of EN81-20 shall be met.

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BuffersBuffers

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BuffersBuffers

Where buffers travel with either the car or counterweight the position at which they strike the pit floor must be clearly marked with a pedestal not less than 300mm high.

This is not required for the counterweight if the screen extends to within 100mm of the pit floor.

For hydraulic lifts with telescopic jacks at least one stage shall not hit its down travel mechanical limit when the car is fully buffered.

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BuffersBuffers

All buffers, except energy accumulation type, shall have a label with the type certificate number, buffer type, and oil details where hydraulic.

For Accumulation type buffers with non-linear characteristics the maximum compression now takes consideration of the fixing element.

Accumulation type buffers made from synthetic materials have to be checked periodically on aging considering instructions from the manufacturer.

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BuffersBuffers

Annex L.

Annex L is now deleted.

It was neither widely understood or used.

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Sill ClearancesSill Clearances

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Sill ClearancesSill Clearances Da

te:

Sig

na

ture

:

0,12 m

35 mm

0,15 m

0,15 m

0,15 m

0,2 m

• Clearances are not changed

• Only one recess of more than 150mm between two consecutive landingentrances

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Electrical Electrical Installation & Installation &

AppliancesAppliances

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Electrical InstallationElectrical Installation

The electrical sections of EN81-1 and EN81-2 have not changed in any substantive way since 1989.

The AH6 groups task was one of the longest to complete.

All electrical equipment shall now be All electrical equipment shall now be in accordance with EN 60204-1 in accordance with EN 60204-1 unless otherwise described.unless otherwise described.

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Dimension now given for position of equipment to allow maintenance access.

Labelling now required for electrical and thermal hazards.

Protection against electrical shock shall comply with IEC 60364-4-41 and EN 50274.

Socket outlets to be provided with RCD at 30 mA

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SIL levels of electric safety devices have been set to be the same in comparative ISO standards.

When the design of a safety device (listed in Annex A) includes software, it shall be possible to identify the failure state of the device, either by built-in system or by an external tool, if this external tool is a special tool, it shall be available on the site.

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ControlsControls

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ControlsControls

All docking operations are deleted as no longer being of relevance to the market.

Push buttons for inspection controls shall comply to EN 60947-5-1.

Inspection controls are to stop the lift with 2m clearance in the pit and headroom. Further movement towards the minimum refuge spaces is then allowed upon pressing the control button again at 0.3 m/s.

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ControlsControls

Push buttons for inspection controls shall comply to EN 60947-5-1.

Inspection controls on the car top to have a “Run” button to act with up and down buttons.

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ControlsControls

The lift shall be provided with a means to prevent the lift from answering to landing calls, to disable the automatic door operation and give at least terminal floor calls for maintenance.

Landing and Car Door By-pass Control

It is now allowed to have a feature, accessible to authorized and competent persons only to by-pass the locking contacts for maintenance purposes.

The alarm is now specified as that of EN 81-28

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Traction Traction & Hydraulic & Hydraulic

DrivesDrives

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Traction DrivesTraction Drives

Brake

The machine shall be capable of having the brake released by a continuous manual operation, even in the case of power supply failure. The operation can be mechanical (e.g. lever) or electrical by independent supply.

With the brake manually released and the car loaded at 80 % of the value of the balanced load of the car, it shall be possible to move the car to an adjacent floor:

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Hydraulic DrivesHydraulic Drives

The dimensions and tolerances of the tubes used for the manufacture of the jack shall be according to the applicable standard of the EN 10305 series.

Jack calculations have been amended to remove errors.

The emergency lowering valve shall not cause further sinking of the ram when the pressure falls below a value predetermined by the manufacturer.

The restrictor and rupture valves shall be accessible for inspection directly from the car roof or from the pit

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Verification, Verification, Information for UseInformation for Use

&&Technical DossierTechnical Dossier

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VerificationVerification

Testing of the installation on completion at site to be retained in EN 81-50.

Type Testing of components to be moved to EN 81-50

Some new testing required for traction, brake and buffers to cover new EN 81-20 requirements.

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Information for UseInformation for Use

Most signage requirements are now to be found in the relevant technical clause.

Some new requirements for the logbook and instruction manual, including how to use any special tools which may have been provided.

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Information for 3Information for 3rdrd Party Verification Party Verification

A list of documentation which might need to be considered for those seeking approval under conformity assessment procedures.

This has been produced in association with the Notified Bodies central European committee.

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FINISHED FINISHED !!AT LEAST UNTIL THE PUBLIC AT LEAST UNTIL THE PUBLIC COMMENTS ARE RECEIVED !COMMENTS ARE RECEIVED !

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Effects on lift products by EN81-1/2 re-drafting EN 81-20 / 50 Revision.

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Transcript of Effects on lift products by EN81-1/2 re-drafting EN 81-20 / 50 Revision.