outdoor cranes, normally mounted near center of the
bridge. Provide location of cutout. Delete
paragraph if not applicable.
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A wind-indicating device with an adjustable alarm trip point shall be
provided. Alarm trip shall have time-delay for wind gusts. Adjustable
trip shall actuate an oscillating blue light and bell mounted near [_____].
Bell shall have the ability to be cut from the [pendant station] [cab].
2.4.14.7
Electrically-Driven Oil Pump Alarm
Electrically-driven lubricating pump shall be complete with an audible
alarm and red light for indication of pump malfunction. Location of alarm
shall be the factory standard location.
2.4.15
Load-Limit System
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NOTE: Specify load sensing if loads approaching the
capacity of the crane are to be lifted routinely.
**************************************************************************
A load-limit visual/audible system shall be provided for the main hoist to
inform the operator that the preset load has been exceeded. The load-limit
system shall consist of a load-cell, load-sensing electronics, overload
indicator lights, overload alarm bell and alarm cut-out switch. Load cell
shall be mounted to receive the load from equalizing sheave pin or upper
block sheave pin. The alarm setpoint shall be adjustable.
2.4.15.1
Load-Sensing Electronics
Load-sensing electronics shall be NEMA Type [1] [3R] [12] enclosures.
Alarm setpoint shall be adjustable.
2.4.15.2
Alarm and Indicator Light
An overload alarm light shall be provided to indicate a load greater than
the preset maximum. Overload alarm shall be indicated with a red light and
clearly labeled "OVERLOAD". A bell shall be provided to indicate when an
overload condition exists. Provision shall be made to turn off the bell.
2.4.16
Cab Heating and Ventilating [and Air-Conditioning]
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NOTE: If heating or air conditioning of the cab is
required, edit this paragraph to specify design
requirements; otherwise delete this paragraph.
Refer to TM-5-785 or AFM 88-29 ambient temperatures
for cab heating and air conditioning.
**************************************************************************
Cab shall be thermally-insulated and shall be provided with air-conditioner
and electric heater. A filter unit shall pressurize the cab with filtered
outside air. Air filter shall be a standard commercial type capable of
removing airborne dust and shall be located where it can be readily cleaned
or changed. Air conditioner with heater shall be controlled with an
adjustable thermostat. The unit shall meet the Energy Efficient
requirements of ASHRAE 90.1. The cab interior shall be maintained at 18
SECTION 14630A
Page 48
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