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SCC3000US Crawler Crane ― Operation Manual
Section 4-Load Charts
Table 3-1 Hook Parameters
Notes:Weight of wire ropes reeving between hooks (main hook, auxiliary hook) and boom/jib heads is
calculated by 3.3kg/m(2.22lb/ft).
Model
(t) (USt)
250
(275)
150
(165)
100
(110)
80
(88)
35
(39)
13.5
(15)
Deadweight (kg)
(lb)
4300
(9,480)
3100
(6,830)
2000
(4,400)
1500
(3,300)
1200
(2,640)
450
(990)
1 General
1.1 Calculation of Rated Loads
Rated loads in the load charts are determined either by strength or by stability.
Rated loads determined by stability are calculated according to ISO 4305:1991 Mobile Cranes——
Determination of Stability and these rated loads are always within the 75% of tipping load.
1.2 Use the Load Charts Properly
1)Ground conditions: rated loads in the load charts are calculated in the condition that the crane is
on hard, horizontal and evenly-supported ground with gradient smaller than 1%. If these condition
requirements are not fullled, the value of rated loads must be decreased for calculation.
2)Actual Lifting Capacity: the weight of hook blocks, lifting devices, and wire ropes reeving between
the hooks and boom/jib heads must be deducted from the rate load to obtain a net lifting value, i.e. the
actual lifting capacity.
3)Wind Speed: Calculating rated loads also takes allowable wind speed of each operating condition
into consideration. The SCC3000US crawler crane is allowed to operate when the speed of stable wind
or gust is not exceeding 16m/s(35.8mph). Hence the maximum allowable wind speed for SCC3000US
crawler crane is 9.8m/s(21.9mph)~16.0m/s (35.8mph) (equivalent to 60~160 N/m
2
(0.009~0.023psi)
dynamic pressure); when the wind speed is higher than 16m/s and lower than 22m/s(49.2mph), the
crane is not allowed to operate but allowed to have the boom system upstanding; when wind speed is
higher than 22m/s(49.2mph), the boom system must be lowered down to the ground.
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