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ASME A17.8 2021

ASME A17.8 2021

$98.04

ASME A17.8/CSA B44.8 – 2021 Standard for Wind Turbine Tower Elevators

Published By Publication Date Number of Pages
ASME 2021 110
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This standard applies to elevators permanently installed in a wind turbine tower to provide vertical transportation of authorized personnel and their tools and equipment only. Such elevators are typically subjected to extreme temperatures, humidity variations, and substantial horizontal motions.

PDF Catalog

PDF Pages PDF Title
8 Contents
13 ASME A17 Elevator and Escalator Standards Committee
15 CSA B44 Technical Committee on the Elevator Safety Code
20 ASME A17.8/CSA B44.8 Joint Committee on Wind Turbine Tower Elevators
23 Foreword
26 Preface
32 1 General
1.1 Scope
1.1.1 Effective date
1.2 Purpose and exceptions
1.2.1 Purpose
1.2.2 Exceptions to ASME A17.8/CSA B44.8
1.3 Definitions
40 1.4 References
42 2 Wind turbine tower elevators
2.1 Construction of hoistways
2.1.1 Hoistway enclosure not required
2.1.2 Enclosures required at landings
2.1.3 Floor over travel path not required
43 2.2 Pits
2.2.1 Pits shall not be provided.
2.3 Location and enclosing of counterweights
2.3.1 Counterweight runways
2.3.2 Access to enclosed counterweights and ropes
2.4 Vertical clearances for cars and counterweights
2.4.1 Top car clearance (maintenance/inspection access required)
44 2.4.2 Top car clearance (maintenance/inspection access not required)
2.4.3 Top counterweight clearance
2.5 Horizontal car and counterweight clearances
2.5.1 Between car and landing platforms
2.5.2 Between car and any stationary object
2.5.3 Between car and counterweight and counterweight guard
2.5.4 Measurement of clearances
2.6 Protection of spaces below the travel path
2.7 Machinery spaces and control spaces
2.7.1 Equipment location
45 2.8 Equipment in the travel path, machinery space, and control spaces
2.8.1 Electrical equipment and wiring
2.9 Machinery and sheave beams, supports, and foundations
2.9.1 Securing of machinery beams and type of supports
46 2.9.2 Loads on overhead beams and supports
2.9.3 Allowable stresses and deflections for machinery and sheave beams, their supports, and any support members that transmit load to the turbine tower walls
2.10 Guarding of equipment and standard railing
2.10.1 Guarding of equipment
2.10.2 Standard railing
47 2.10.3 Landing platform protection
2.11 Protection of landing platform openings
2.11.1 Landing platform doors or gates
2.11.2 Door or gate closers
2.11.3 Horizontal platform inside enclosure
2.11.4 Platform lighting
2.11.5 Landing platform enclosures
48 2.12 Landing platform door and gate locking devices, electric contacts, and trapped key systems
2.12.1 Landing platform door and gate locking devices
2.12.2 Where required (for automatic call operation)
2.12.3 Listing/certification door locking devices and door or gate electric contacts and landing platform enclosure gate combination mechanical locks and electric contacts
49 2.12.4 General design requirements
50 2.12.5 Listing/certification door locking devices and door or gate electric contacts
2.13 Power operation of landing platform doors and car doors or gates
2.14 Car enclosures, car doors and gates, and car illumination
2.14.1 Car enclosure
2.14.2 Car height
51 2.14.3 Vision panels
2.14.4 Enclosure panels
2.14.5 Strength of car top
2.14.6 Top of car railing
2.14.7 Car illumination
2.14.8 Emergency lighting
52 2.14.9 Car emergency exit
2.14.10 Car doors and gates
2.14.11 Car door and gate electric contacts
53 2.14.12 Clear openings
2.14.13 Sectioning
2.14.14 Ventilation
2.15 Car frames and platforms
2.15.1 Car frames and floors
2.15.2 Use of cast iron
2.15.3 Number of compartments
2.15.4 Guiding means
2.15.5 Strength of guiding means
54 2.15.6 Car frame
2.15.7 Guiding members
2.15.8 Kickboard
2.15.9 Obstruction-detection devices
2.15.10 Warning devices
55 2.15.11 Ladder-guided platforms
2.16 Capacity and loading
2.16.1 Capacity and data plates
2.16.2 Information required on plates
2.16.3 Limitation of load, speed, and platform area
2.16.4 Overload detection means
2.16.5 Speed-limiting device
2.17 Car and counterweight safeties
56 2.17.1 Wire rope gripping safety
2.17.2 Rack-and-pinion safety
57 2.17.3 Safety marking plates
2.17.4 Opening of driving-machine motor and brake control circuits on safety application
2.17.5 Application of safety
2.18 Reserved for future use
2.19 Reserved for future use
2.20 Suspension means and their connections
58 2.20.1 Suspension means for counterweighted traction elevators
2.20.2 Suspension means for uncounterweighted traction elevators
60 2.20.3 The factor of safety shall be calculated by the following formula:
2.20.4 Replacement of suspension means
2.21 Counterweights
2.21.1 Counterweight guides
2.21.2 Types of counterweight construction
2.22 Buffers, bumpers, and retardations
61 2.22.1 Bumpers
2.22.2 Spring buffers
2.22.3 Retardations
2.23 Car and counterweight guidance systems, supports, and fastenings
2.23.1 Wire rope guidance system for uncounterweighted traction drive machines
63 2.23.2 Ladder guidance systems
64 2.24 Driving machines, sheaves, and brakes
2.24.1 Rack-and-pinion driving machines
65 2.24.2 Traction driving machines, sheave and brakes
66 2.24.3 Material and grooving for sheaves
2.24.4 Factor of safety for driving machines and sheaves
2.24.5 Bolts transmitting torque and set screws
2.24.6 Friction-gearing or clutch mechanism
2.24.7 Use of cast iron in gears
2.24.8 Braking system of driving machines
67 2.24.9 Means for manual release of driving machine brake
2.25 Terminal stopping devices
2.25.1 Final terminal stopping
68 2.25.2 Normal terminal stopping
69 2.25.3 Slack rope detection
2.26 Operating devices and control equipment
2.26.1 Operation and operating devices
2.26.2 Electrical protective devices
70 2.26.3 Contactors and relays for use in critical operating circuits
2.26.4 Electrical equipment and wiring
71 2.26.5 Phase protection of motors
2.26.6 Installation of capacitors or other devices to make electrical protective devices ineffective
2.26.7 Control and operating circuits
72 2.26.8 Release and application of driving-machine brakes
73 2.27 Emergency operation and signaling devices
2.28 Layout drawings
2.29 Welding
2.29.1 Qualification of welders
2.29.2 Welding steel
2.29.3 Welding metals other than steel
74 2.30 Engineering tests, type tests, and certification requirements
2.30.1 General requirements for tests and certifications
75 2.30.2 Type tests of interlocks, combination mechanical locks and electric contacts, and door or gate electric contacts
76 2.30.3 General requirements
2.30.4 Required tests and procedure
78 2.31 Code data plate
2.31.1 Required information
2.31.2 Location
2.31.3 Material and construction
79 3 Maintenance, repair, replacement, testing, and alterations
3.1 Maintenance
3.1.1 General maintenance requirements
80 3.1.2 Maintenance personnel
3.1.3 Maintenance records
81 3.1.4 Code data plate
3.1.5 General maintenance methods and procedures
82 3.1.6 Periodic tests
83 3.2 General repair requirements
3.2.1 Applicable codes
3.2.2 Welding and design
3.2.3 Repair of suspension, guide, and safety ropes
3.2.4 Repair of safety
3.3 General replacement requirements
3.3.1 Replacement parts
3.3.2 Replacement suspension, guide, and safety rope
84 3.3.3 Replacement of car or counterweight safety
3.3.4 Replacement of driving machine
3.3.5 Replacement of controller
3.3.6 Listed/certified devices
3.4 Maintenance and testing of wind turbine tower elevators
3.4.1 Suspension means
85 3.4.2 Wire rope gripping safeties
3.4.3 Brakes
3.4.4 Car and counterweight safeties
86 3.4.5 Tests without load via alternative test methodologies
87 3.5 Alterations
3.5.1 Applicability of alteration requirements
3.5.2 Items not covered in
3.5.3 Testing
3.5.4 Welding
3.5.5 Design
3.5.6 Temporary wiring
3.5.7 Repairs and replacements
3.5.8 Code data plate
3.5.9 Location and guarding of counterweights
3.5.10 Vertical car and counterweights clearances and runbys
3.5.11 Horizontal car and counterweight clearances
3.5.12 Machinery spaces, and control spaces
88 3.5.13 Machinery and shave beams, and supports
3.5.14 Platform door locking devices
3.5.15 Car enclosures, car doors and gates, and car illumination
3.5.16 Car frames and platforms
3.5.17 Change in rated speed
89 3.5.18 Driving machines and sheaves
3.5.19 Controllers
3.5.20 Car and counterweight safeties
3.6 Acceptance inspections and tests
90 3.6.1 General requirements for acceptance inspections and tests
91 3.6.2 Acceptance inspections and tests
94 3.6.3 Inspection and test requirements for altered installations
3.7 Periodic inspections and witnessing of tests
3.7.1 General requirements for periodic inspections and witnessing of tests
96 3.7.2 Periodic inspection requirements
98 3.7.3 Periodic test requirements — Category 1
3.7.4 Periodic test requirements — Category 5
99 3.7.5 Category 5 tests without load via alternative test methodologies
101 Annex A (informative)Wind turbine tower elevator clearances
102 Figure
Figure B-1 Maintenance control program records
Annex B (informative)Maintenance control program records
103 Table
Table B-1 Maintenance control program records
104 Annex C (informative)Acceptance tests

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