The crane shall have a minimum rated capacity of [_____] metric tons tons
(one ton equals 2000 pounds).
2.1.4
Speeds
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NOTE A: 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
TYPICAL HOIST LIFT RANGES AND RATED
LIFTING SPEED RANGES
-------------------------------------------------
Rated load
Hoist
lifting
capacity
lift range
speed range (mm/s)
(metric tons)
(m)
Low
High
_________________________________________________
1/2
3 to 30
75 to 300
1
3 to 30
75 to 300
2
3 to 28
75 to 250
3
3 to 28
90 to 200
5
3 to 18
50 to 200
7-1/2
3 to 12
50 to 225
10
6 to 38
50 to 200
_________________________________________________
TYPICAL HOIST LIFT RANGES AND RATED
LIFTING SPEED RANGES
-------------------------------------------------
Rated load
Hoist
lifting
capacity
lift range
speed range (fpm)
(tons)
(ft)
Low
High
_________________________________________________
1/2
10 to 100
15 to 60
1
10 to 100
15 to 60
2
10 to 84
15 to 70
3
10 to 84
18 to 51
5
10 to 56
10 to 40
7-1/2
10 to 36
10 to 45
10
20 to 115
10 to 40
_________________________________________________
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 mm/s 50 to 60 ft/min).
3.
Bridge: Bridge travel speed should not exceed
the maximum speed that the floor walking, crane
SECTION 14637N
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