99903514: TELESCOPIC CRANE: 1-13 SECTION 1: OPERATION
NOTE:
”TWO-BLOCKING” IS THE CONDITION IN
WHICH THE SNATCH BLOCK OR HOOK
ASSEMBLY COMES IN CONTACT WITH
THE UPPER LOAD BLOCK OR BOOM
POINT SHEAVE ASSEMBLY.
Figure A-16: Anti Two-Blocking Device
Components
Figure A-14: Normal Work Position
Figure A-15: Approaching Two-Blocking
Situation
NOTE:
THESE ILLUSTRATIONS OF “TWO-
BLOCK” CONDITIONS APPLY TO
CRANES WITHOUT THE LOW PROFILE
BOOM TIP. SEE FIGURE A-12 FOR THE
TWO BLOCK CONFIGURATION FOR
CRANES WITH LOW PROFILE BOOM
TIPS.
20030115
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