00-C-2763
3.9 Pe rformance. The crane shall be capable of independently and
simultaneously lifting and rotating at a speed of not less than 2 revolutions
per minute. The crane, without load, shall be capable of attaining and
maintaining a travel speed, on level paved roads, of nut less than 40 miles per
hour (mph). The crane, without load, shall be capable of traveling on
unimproved roads found on construction sites, shall travel up not less than a 20
percent grade on paved roads or hard-packed surfaces without engine stall; and
shall be capable of negotiating 15 percent side slopes.
3.9.1 Lifting capacities. The crane shall have lifting capacities of not
less than those specified at the radii and boom lengths specified (see 6.1).
3.9.2 Stability. With lubricating and cooling systems full, fuel tank(s) at
least half full, with crane resting on firm, level, and uniform supporting
surface, with outriggers unsupported, with the boom fully retracted the crane
shall conform to the following requirements.
With the longitudinal axis of the rotating superstructure of the
a.
crane at 90 degrees to the longitudinal axis of the carrier, the boom
retraced and set at the minimum recommended radius, the total load on
all wheels on the side of the carrier under the boom shall not be
less than 15 percent of the total weight of the crane.
b.
With the longitudinal axis of the rotating superstructure of the
crane in line with the longitudinal axis of the carrier, in ether
direction, the boom retracted and set at the minimum recommended
radius, the total load on all wheels under the lighter load end of
the carrier shall not be less than 15 percent of the total weight of
the crane.
3.9.3 Power load lowering . Power load lowering by hydraulic control shall
be provided for the main and auxiliary hoists to facilitate controlled load
lowering or lifting at any boom lengths or elevation. The power load lowering
means shall provide positive control of a single line load equal to the maximum
rated crane capacity divided by the recommended number of parts of hoist line
reeving.
3.9.4 Hoist and rotation. The available line pull and speed shall be as
rated in accordance with PCSA Standard for the operational requirements of the
crane hoisting drums. The power transmission system used to rotate the
superstructure shall be a hydraulic mechanical arrangement with a continuous
swing rotation angle of not less than 360 degrees. Swing speed within this
range shall be smooth and constant, and adequate control shall be provided in
the hydraulic circuit to insure smooth starting and stopping. The crane shall
simultaneously lift and rotate throughout the rated working area. The main
hoist which shall be of a two speed type. The auxiliary winch shall be
manufactures standard . An auxiliary boom paint sheave shall be furnished.
3.9.5 Rated load capacities chart. A permanent chart indicating all the
rated load capacities on each boom reach and radii over the side and over the
rear, with outriggers shall be posted in the crane cab near the operator and
also on the outside of the crane to be legible from ground level. The rated
load capacity chart shall reflect the manufacturer's standard commercial rating
for the size and model crane furnished, and not be limited to the minimum
required capacities specified.
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