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CSA B44.8-2016 pdf free download
CSA B44.8-2016 pdf free download.Standard for wind turbine tower elevators.
2.32 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 exdusive 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.CSA B44.8-2016 pdf free download.
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