NOTE: Slow full-load operating speeds invariably
provide improved load control and increased
productivity. The full-load speeds enclosed in
brackets are recommended for most applications.
However, should other speeds be required, the
following guidelines are provided:
1.
Hoist:
STANDARDIZED HOIST LIFT RANGES,
RATED LIFTING SPEED RANGES
-----------------------------------------------------------
Rated load
Hoist
Hoist lift
capacity
lift range
speed range (mm/s)
(metric tons)
(m)
Low
High
-----------------------------------------------------------
3
3 to 28
50 to 250
5
3 to 18
50 to 200
7 1/2-10
3 to 17
40 to 150
-----------------------------------------------------------
STANDARDIZED HOIST LIFT RANGES,
RATED LIFTING SPEED RANGES
-----------------------------------------------------------
Rated load
Hoist
Hoist lift
capacity
lift range
speed range (ft/min)
(tons)
(ft)
Low
High
-----------------------------------------------------------
3
10 to 84
10 to 50
5
10 to 56
10 to 45
7 1/2-10
10 to 49
8 to 30
-----------------------------------------------------------
2. Trolley: Trolley travel speed should
approximate the speed required to traverse the
bridge span in 45 seconds. (12 m40 ft span-trolley
speed 250 to 300 m/s 50 to 60 ft/min).
3. Bridge: Bridge travel speed should not exceed
the maximum speed that the floor walking, crane
pendant control operator can comfortably negotiate
in a work area, approximately 750 mm/s 150 ft/min.
**************************************************************************
OET crane shall have the following full load speeds (plus or minus 10
percent):
a.
Hoist - high speed of [75 mm/s15 feet per minute (ft/min)] [_____]
b.
Trolley - high speed of [300 mm/s] [60 ft/min] [_____]
c.
Bridge - high speed of [500 mm/s] [100 ft/min] [_____]
[For two speed motions, provide the low speeds at 1/3 of the specified high
speeds.]
SECTION 14636N
Page 9
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