Approved Code of Practice for Cranes
Part 10: Mobile cranes
10.1 General
Mobile cranes require design verification by an inspection body in accordance with the PECPR Regulations and Parts 2 and 6 of this code, prior to certification for use within New Zealand.
Parts 3, 4, 7, 8 and 9 of this code also apply.
A supplier, controller or manufacturer of such a mobile crane shall provide this documentation, as in Part 8.1, to the inspection body carrying out the design verification.
Safe load indicators:
(1) For minimum load safety device requirements required on various crane types refer to Appendix A: Load Safety Devices/Safe Load Indicators.
10.2 Additional Requirements
In addition to the requirements in Part 10.1 and Part 3: Operational Requirements for Controllers, the following are also required:
(1) The stability of a crane under static conditions shall be such that the rated capacity is not greater than the percentage of the tipping load that would need to be applied to tip the crane over. Rated capacity shall not exceed an upper limit of 78% of the tipping load for all cranes or such lesser limit as may be specified by the manufacturer. For free on wheels, it is to be not more than 66%.
(2) The rope safety factor shall be the greater of 4.5 or that required by the design class of the crane for hoist, luffing and running ropes, 3.5 for standing (e.g. pendant ropes) and 3 for erection ropes, and ropes shall be the manufacturer's recommended rope types and construction for each application.
(3) All rigging and boom options the crane is fitted for shall be shown in the cab.
(4) An "anti-two-block" warning or cut-out device shall be fitted to cranes in accordance with Appendix A.
10.3 Inspections
(1) Annual visual and operational inspections by an equipment inspector are required to assess the general condition for continued safe operation and certification. This should cover, but is not necessarily limited to:
(a) crane documentation including certified rating sheets marked with the crane unique identifier and serial number
(b) maintenance and repair records including any new rope, hook or hook block certificates
(c) operation of crane to be demonstrated
(d) general condition of crane structure including fastenings, chassis, outriggers and boom and fly jibs including where applicable, any interlocking system
(e) coatings condition (paint, etc.), markings and labels
(f) general wear and tear
(g) conditions of welded joints
(h) level indicator (if fitted)
(i) tracks/tyres
(j) slew ring/king post
(k) boom arrestors and backstops
(l) bridle
(m) counterweight/ballast
(n) sheaves and bearings
(o) hoist, luffing and slew brakes including brake linings
(p) safety guarding
(q) drums and locking pawls
(r) gearing
(s) hydraulic system including rams and attachments
(t) anti-two-block and other limit switches
(u) test of safe load indicator with test load to confirm all functions are within manufacturers recommendations
(v) condition of hoist, luffing and pendant ropes
(w) rope anchors and dead ends
(x) hooks, hook blocks and swivel bearings
(y) lifting spreaders when used in place of a hook
(z) cab condition and controls (including safety latches).
Further detailed in-depth inspections may be required depending on the results of visual inspection.
Picture 2: Mobile Crane