New York Codes, Rules and Regulations › Title 12 - DEPARTMENT OF LABOR › Chapter I - Industrial Board Of Appeals › Subchapter A - The Industrial Code › Part 32 - Ski Tows And Other Passenger Tramways › General Provisions › Section 32.13 - Adoption of ANSI B77 standard

Current through Register Vol. 46, No. 28, July 10, 2024
The following ANSI B77 2006 sections are to be modified
						as indicated. Text in brackets [ ] is to be deleted. Underlined text is to be
						added to the ANSI sections. ANSI B77 Section 1 is not adopted and is excluded
						in its entirety.
ANSI B77, Section 2.1.1.6.2
						Foundations
In determining the resistance of the soil to motion of
						the foundation, the subsoil conditions at the site shall be considered,
						including any buoyancy due to groundwater that may be present. If the
						resistance of the soil is not practically determinable, the foundation or
						anchorage [should]
shall
be designed as a gravity anchor,
						using a coefficient of friction appropriate to the general character of the
						soil. Bottoms of foundations shall be below the normal frost depth unless
						resting on non-frost susceptible soil or solid rock. Foundations on rock shall
						be firmly anchored to solid rock, unless designed as gravity
						foundations.
The top of concrete foundations shall not be less than 6
						inches (150 mm) above finished grade unless specific direction for the
						protection of the foundation and structural steel below grade is specified by
						the designer. The design shall have a minimum factor of safety of 2 in
						resisting overturning and, concurrently, 2 against sliding, under dead-load and
						live-load conditions. The minimum factors shall be 1.5 under these loadings
						plus wind acting simultaneously.
ANSI B77, Section 2.1.1.11.1 Acceptance
						inspection
Before an aerial tramway that is new or relocated or that
						has not been operated for routine maintenance within the previous 2 years is
						opened to the public, it shall be given a thorough inspection by [qualified
						personnel]
the Commissioner
to verify compliance with the
						plans and specifications of the designer.
ANSI B77, Section 2.1.1.11.2 Acceptance
						tests
Before an aerial tramway that is new or relocated or that
						has not been operated for routine maintenance within the previous 2 years is
						opened to the public, it shall be given thorough tests by qualified personnel
						to verify compliance with the plans and specifications of the designer. The
						designer or manufacturer shall propose and submit an acceptance test procedure.
The Commissioner shall be advised by the Owner 10 days prior to the
						date of the test.
Thorough load and operating tests
done in the
						presence of the Commissioner
shall be performed under full loading and
						any partial loadings that may provide the most adverse operating
						conditions.
ANSI B77, Section 2.1.2.6 Brakes
The aerial tramway shall have the following friction-type
						brakes: - service brake (see 2.1.2.6.1); - drive sheave brake (see 2.1.2.6.2)
						NOTE - For requirements of systems with or without track cable brakes, see
						2.1.4.4.2.
All drive braking systems shall be designed and monitored
						to ensure that:
a) once the aerial
					 tramway begins movement in the intended direction, the brakes are maintained in
					 the open position;
b) the service
					 brake shall not open prior to the prime mover providing control for the
					 ropeway;
c) multiple brakes or
					 brake systems shall not be simultaneously applied such that excessive
					 deceleration is applied to the aerial tramway under any design loading
					 condition;
d) the failure of one
					 braking system to stop the aerial tramway shall automatically initiate a second
					 braking system, if any.
The service brake and drive sheave brake shall be
						designed such that failure of one braking system shall not impair the function
						of the other systems. All brakes shall have the braking force applied by
						springs, weights, or other approved forms of stored energy.
Hydraulic systems shall be designed to reduce the
						possibility of oil contaminating the braking surfaces in the event of a failure
						of a hose, cylinder or fitting.
The service brake and drive sheave brake shall be
						designed to assure operation under all anticipated conditions.
All drive braking systems shall be capable of operation
						to comply with the daily inspections and periodic testing.
The manufacturer or a Qualified Engineer shall furnish a
						written procedure to be followed and shall specify the auxiliary equipment
						necessary for periodic testing and adjustment of the holding force of each
						brake. Direction of travel, speed, percent load, and position of the carriers
						shall be determined and added to the procedure in the maintenance manual. The
						procedure shall additionally specify:
e) the minimum and maximum holding force for
					 the service brake and drive sheave brake or other criteria which establishes
					 the acceptable range of holding force, and;
f) the minimum and maximum deceleration rates
					 for the service brake and drive sheave brake.
This baseline procedure shall be performed at the
						completion of the acceptance test, and then at the frequency specified, in
						order to demonstrate the ability of each brake to produce the required force
						(see 2.1.1.11.2).
Testing shall be accomplished as part of normal
						maintenance. As a minimum, testing shall be performed [monthly]
weekly
during the normal operating season(s) of the tramway.
						Testing shall not be done while the tramway is open for public
						operation.
If a device is permanently installed to cause a brake to
						be disabled for testing, it shall be monitored so that the tramway cannot be
						operated in its normal mode when the brake is so disabled.
ANSI B77, Section 2.1.2.8.1
						General
All sheaves, including their mountings and frames, shall
						be designed to withstand static and dynamic loads. Sheave bearings and
						mountings shall be selected, designed, and installed in accordance with the
						recommendations of the manufacturers of the bearings.
When unlined sheave grooves are used for wire rope, they
						[should]
shall
be V-shaped and shall have rounded bottoms with
						a radius equal to approximately 55% of the rope diameter.
When lined sheave grooves are used, the allowable bearing
						pressures of the liner material shall not be exceeded.
ANSI B77, Section 2.2.1.2
						Location
All electrical power transmission wiring located near or
						proposed to cross over aerial tramways shall comply with the applicable
						requirements of IEEE C2-2002.
No aerial lift shall pass under any
						transmission lines operating at a potential exceeding 50 volts.
ANSI B77, Section 2.2.1.6.3 Haul rope
						grounding
Grounding sheaves with conductive liners or equivalent
						means [should]
shall
be provided at one location for the
						purpose of grounding haul ropes and track cables, as applicable, for static
						electrical discharge. For the haul rope on bicable systems or monocable systems
						with an isolated or insulated haul rope incorporated in the operating
						circuitry, no means of grounding are required when the operating circuit takes
						into consideration static electrical discharge.
ANSI B77, Section 2.3.2.5.7
						Evacuation
The owner of each aerial tramway shall submit to
						the Commissioner a detailed written plan for evacuation of passengers from
						cabins or carriers in the event of a power failure or breakdown. The procedures
						set forth in the evacuation plan shall be tested, at any location on the lift,
						in the presence of the Commissioner at his request. The Commissioner, when
						satisfied with the evacuation plan and the results of the test, shall notify
						the owner in writing of such acceptance. A copy of the accepted plan shall be
						kept on the premises and shall be readily available to the Commissioner's
						representative.
[A plan for evacuation of passengers from each aerial
						tramway shall be developed and documented.] The
written
plan
						shall include,
but not be limited to:
a)  the definition of the line of authority
					 in the event of an evacuation. This line of authority shall list:
1) the individuals or positions responsible
					 for determining the need for an evacuation;
2) the individuals or positions responsible
					 for ordering an evacuation;
3) the
					 individuals or positions responsible for performing the evacuation, for first
					 aid, and for ground care of evacuated passengers.