ASME A17.8-2016 pdf download
ASME A17.8-2016 pdf download.Standard for wind turbine tower elevators.
2.3.2 Access to enclosed counterweights and ropes
Access shall be provided for inspection, maintenance, and repair of an enclosed counterweight and its ropes. Doors or gates in the counterweight enclosures shall be self-closing and shall be provided with a) an electric contact, the opening of which will remove power from the elevator driving-machine
motor and brake
b) a self-locking keyed tumbler lock.
2.4 Vertical clearances for cars and counterweights
2.4.1 Top car clearance (maintenance/inspection access required)
Where access to the car top is required for maintenance or inspection and when the car has reached its maximum upward movement, the clearance above the car top, measured vertically up to the horizontal plane described by the lowest part of the overhead structure or other obstruction and measured within the projection of the car enclosure top exclusive of the area outside the standard railing (see 2.10.2), where provided, shall be not less than 1 100 mm (43 in). In no case shall the following additional clearances be less than:
a) 600 mm (24 in) above the car crosshead assembly except when the crosshead is located over the car enclosure top or the distance which any sheave assembly mounted in or on the crosshead projects above the top of the car crosshead, whichever is greater, but in no case shall there be less than 150 mm (6 in) clearance above the sheave assembly.
b) 300 mm (12 in) above the car crosshead assembly where the crosshead is adjacent to the car enclosure top. The crosshead shall not overlap the car enclosure top by more than 100 mm (4 in) horizontally.
c) 600 mm (24 in) above equipment attached to and projecting above the car enclosure top, exclusive of
i) standard railings
ii) areas outside of the standard railing, the vertical clearance shall be not less than 100 mm (4 in)
iii) roller and sliding guide assemblies.
Where access to the car top is required for maintenance and inspection of equipment, a railing conforming to 2.10.2 within 50 mm (2 in) of the perimeter of the car enclosure top shall be provided. When the car has reached its maximum upward movement, there shall be a clearance not less than 100 mm (4 in) from the highest projection of the car top railing to the nearest part of the overhead structure.
2.4.2 Top car clearance (maintenance/inspection access not required)
Where access to the car top is not required for maintenance or inspection
a) equipment mounted on the car top shall not strike any part of the overhead structure or the equipment located in the travel path when the car has reached its maximum upward movement, and
b) a sign shall be provided with the words “DANGER LOW CLEARANCE” prominently posted on the car top equipment. The sign shall conform to ANSI Z535.2 or CAN/CSA-Z321, whichever is applicable. The sign shall be of such material and construction that the letters and figures stamped, etched, cast, or otherwise applied to the face shall remain permanently legible.
The equivalent French wording is “DANGER, JEU REDUIT”.
2.5 Horizontal car and counterweight clearances
Clearances shall conform to 2.5.1 through 2.5.4.
2.5.1 Between car and landing platforms
The clearance between the car and the landing platform shall be greater than or equal to 25 mm (1 in) on the sides used for loading and unloading (see Nonmandatory Annex A).
2.5.2 Between car and any stationary object
There shall be a minimum of 25 mm (1 in) clearance between the car structure and any stationary
objects. Clearances are permitted to be maintained by rollers or similar devices mounted on the car.
Clearance shall be measured from the car structure.
2.5.3 Between car and counterweight and counterweight guard
The clearance between the car and the counterweight shall be not less than 40 mm (1.5 in) at all times and under all operating conditions. The clearance between the car and the counterweight guard, counterweight and the counterweight guard, and between the counterweight and the hoistway enclosure shall be not less than 20 mm (0.8 in).
2.5.4 Measurement of clearances
The clearances shall be measured with no load on the car platform.
2.6 Protection of spaces below the travel path
Where the travel path does not extend to the lowest floor of the structure and there is space below the travel path that is accessible, the floor shall be capable of sustaining
a) a concentrated load of 1 kN (225 Ib) on any 2 000 mm2 (3 in2) area, and
b) a live load not less than 6 kPa (125 lb/ft2) in all open areas.
2.7 Machinery spaces, machine rooms, control spaces, and control rooms
Elevator machine rooms and control rooms are not permitted in wind turbine towers.
2.7.1 Equipment location
Elevator equipment shall be located in machinery spaces and control spaces on the car or outside the travel path and shall conform to 2.7.1.1 and 2.7.1.2.
2.7.1.1 Motor controller location.
