NZ Certificate in Cranes case studies
NZ Certificate in Cranes · Put your knowledge to work in context.
The NZ Certificate in Cranes is a New Zealand certificate-level qualification listed on the New Zealand Qualifications Framework (NZQF), the national register maintained by the New Zealand Qualifications Authority (NZQA). On the NZQF, certificates sit among the lower levels of a ten-level framework, where level one is the least complex and often entry-level, while levels eight to ten cover the most complex post-graduate study. The NZ Certificate in Cranes case studies are 5 cases and about 3,207 words.
1Truck crane beside a trench with unverified fill
A 50 t truck crane is set up on a recently filled pad beside a 2.4 m deep trench to lift a 3.1 t packaged air-handling unit. The lift radius is 16 m, and the load chart for the current boom length and outrigger configuration shows 4.0 t capacity.
643 words, about 3 min2Tower crane tip capacity and wind limit
A hammerhead tower crane is being configured for a project. The jib is 55 m, the counter-jib is 18 m, and the load chart for the current free-standing height of 42 m shows 1.25 t at the jib tip.
658 words, about 3 min3Asymmetric skid with offset centre of gravity
A 4.8 t skid is to be lifted from a truck tray using a two-leg sling assembly. The skid is 3.6 m long, 1.4 m wide and 1.9 m high.
664 words, about 3 min4Hoist rope defects and a defeated limit switch
During a pre-start inspection on a 25 t rough-terrain crane, the operator finds three broken wires in one lay over a 6-diameter length on the main hoist rope, and three more broken wires over a longer section near a sheave. The rope is 16 mm, 6x36 IWRC, and the maintenance record shows it was replaced 14 months ago but has had no rope inspection since.
623 words, about 3 min5Tandem lift with unequal load share
Two 25 t mobile cranes are to tandem-lift a 12 t steel tank from a transport frame onto a foundation. Crane A is at an 8 m radius, where its chart allows 9.0 t; Crane B is at a 10 m radius, where its chart allows 7.0 t.
619 words, about 3 min