ASME 17.8:2016 pdf free download – Standard for wind turbine tower elevators
1.1 Scope
ASME A17.8/CSA B44.8 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 where, by reason of their limited use and the types of construction of the structures served, full compliance with ASME A17.1/CSA B44 Part 2 is not practicable or necessary.
1.1.1 Effective date
The requirements of this edition and subsequent addenda to the Code are effective as of the date noted on the copyright page of this document. The AHJ will establish the effective date for its local regulations.
1.2 Definitions
The following definitions shall apply in this Code:
Authorized personnel — persons who have been instructed in the operation of the equipment and designated by the owner to use the equipment.
Brake, driving machine, elevator, dumbwaiter, or material lift — an electromechanically or electrohydraulically released spring, or gravity applied device, that is part of the electric driving machine of the elevator, dumbwaiter, or material lift used to apply a controlled force at a braking surface to hold or retard the elevator, dumbwaiter, or material lift.
Electromechanically released — a means of brake release in which an electric current applied to an actuator (such as a solenoid) causes an electromagnetic force that overcomes a resisting force (such as a spring) as long as the electric current flows.
Buffer — a device designed to stop a descending car or counterweight beyond its normal limit of travel by storing or by absorbing and dissipating the kinetic energy of the car or counterweight.
Spring buffer — a buffer utilizing one or more springs to cushion the impact force of the descending car or counterweight.
Car enclosure — the top and the walls of the car resting on and attached to the car platform.
Car frame — the supporting frame to which the car platform, upper and lower sets of guide shoes, car safety, and the hoisting ropes or hoisting-rope sheaves, or the plunger or cylinder of a direct-acting elevator, are attached.
Car platform — the structure that forms the floor of the car and that directly supports the load.
Certified — see Listed/certified.
Certifying organization — an approved or accredited, independent organization concerned with product evaluation that maintains periodic inspection of production of listed/certified equipment or material and whose listing/certification states whether that equipment meets appropriate standards or has been tested and found suitable for use in a specified manner.
Note: For the purpose of this definition, accredited means that an organization has been evaluated and approved by an Authorized Agency to operate a Certification/Listing program, and is designated as such in a publication of the Authorized Agency.
Clearance, top car, inclined elevators — the shortest distance in the direction of travel between the upward most portion of the chassis (car frame) and the nearest obstruction when the car is level with the top terminal landing.
Clearance, top counterweight — the shortest vertical distance between any part of the counterweight structure and the nearest part of the overhead structure or any other obstruction when the car floor is level with the bottom terminal landing.
Control, motion — that portion of a control system that governs the acceleration, speed, retardation,and stopping of the moving member.
Control, operation — that portion of a control system that initiates the starting, stopping, and direction of motion in response to a signal from an operating device.
Operation, automatic — operation control wherein the starting of the elevator, dumbwaiter, or material lift car is effected in response to the momentary actuation of operating devices at the landing, and/or of operating devices in the car identified with the landings, and/or in response to an automatic starting mechanism, and wherein the car is stopped automatically at the landings.
Operation, automatic call — operation control wherein the starting of a wind turbine tower elevator car is effected in response to the momentary actuation of operating devices not mounted on the car and wherein the car is stopped automatically at the terminal landing or at the next landing in the direction of travel.