HEO Crawler Crane NC III case studies
HEO Crawler Crane NC III · Put your knowledge to work in context.
The HEO Crawler Crane NC III is a Philippine TVET competency-based credential for crawler crane operators. It is intended for operators who already have basic crane experience and want formal recognition of their ability to inspect, set up, plan lifts, operate, maintain, and document work with crawler-mounted lattice-boom cranes. The HEO Crawler Crane NC III case studies are 5 cases and about 3,243 words.
1Morning Pre-Use Inspection: Rope, Latch, and LMI Defects
At 06:40 after overnight rain, a 50 t crawler crane is due to lift a 2.8 t precast panel. The operator finds the 22 mm 6x19 IWRC boom-hoist rope has seven broken wires scattered in one lay, a tight kink 1.2 m from the dead end, and a worn hook latch that does not spring closed.
666 words, about 3 min2Ground Bearing and Rigging Check Beside an Unshored Excavation
A 90 t crawler crane will lift a 4.6 t generator from a delivery truck and set it on a foundation 9 m from the track edge. The crane weighs 76 t with counterweights; the tracks sit on compacted fill soaked by rain.
676 words, about 3 min3Jib Capacity, Missing Keepers, and a Defeated Anti-Two-Block
A 120 t crawler crane is assembled with a 42 m main boom and an 18 m jib offset at 30°. The lift is a 2.9 t air-handling unit to a roof at 36 m radius.
648 words, about 3 min4Pick-and-Carry Overload on a Grade and Soft Patch
A 70 t crawler crane is using a 24 m boom to carry a 7.8 t steel coil from the laydown yard to the fabrication shop, a 55 m travel. The static load chart at 12 m radius allows 7.2 t; the pick-and-carry chart for the same boom at 12 m allows 5.4 t.
643 words, about 3 min5Tight Capacity Calculation, Expired Certification, and Hands on the Load
A 150 t crawler crane is lifting a 9.4 t vessel with a 54 m main boom at 30 m radius, 360° swing. The load chart shows 12.0 t at 30 m for the 54 m boom.
610 words, about 3 min