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RT55 Rough Terrain Crane 01 - 3

1.5 GENERAL

1.5.1 Rated loads as shown on Lifting Charts pertain to this machine as originally

manufactured and equipped. Modifications to the machine or use of optional

equipment other than that specified can result in a reduction of capacity.

1.5.2 Construction equipment can be hazardous if improperly operated or maintained.

Operation and maintenance of this machine shall be in compliance with the

information in the Operator’s Manual supplied with this machine. If these manuals

are missing, order replacements from the manufacturer through your distributor.

1.5.3 These warnings do not constitute all of the operating conditions for the crane. The

operator and job site supervision must read the Operator’s Manual.

1.5.4 This crane and its load ratings are in accordance with ASME/ANSI B30.5.

1.6 DEFINITIONS

1.6.1. LOAD RADIUS – The horizontal distance from the axis of rotation before loading to

the center of the vertical hoist line or tackle with a load applied.

1.6.2. LOAD BOOM ANGLE – It is the angle between the boom base section and the

horizontal, after lifting the rated load at the rated radius. The boom angle before

loading should be greater to account for deflections. The loaded boom angle

combined with the boom length give only

an approximation of the operating radius.

1.6.3. WORKING AREA – Areas measured in a

circular arc about the centerline of rotation

as shown in the diagram.

1.6.4. FREELY SUSPENDED LOAD – Load

hanging free with no direct external force

applied except by the hoist rope.

1.6.5. Side load – Horizontal force applied to the lifted load either on the ground or in the

air.

1.6.6. EXTRA-CAUTION ZONE – Tipping can occur with some boom/jib combinations at

radii within this area without any load on the hook.

1.6.7. BOOM SIDE OF CRANE – The side of the crane over which the boom is

positioned when in an OVER SIDE working position.

Zoomlion RT55 User Manual

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