R614-5-1. Crawler Locomotive and Truck Cranes

Related Notices

Latest version.

Two Blocking Damage Preventive Feature. On hydraulic cranes with power telescoping booms, an "Anti Two-Blocking" feature, warning device, or other arrangement, shall be provided to warn the crane operator to avoid colliding ("two-blocking") the hook block with the boom point when hoisting the load, when extending the boom or when booming up or down.

                    
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