| Maximum lifting capacity |
Maximum rated load and the load chart at the working radius you actually need. |
Construction tower cranes are available across a wide range of capacities. Capacity generally decreases as the working radius increases; compare rated loads at specific radii, not just the headline maximum. |
A crane that meets the maximum-load requirement only close to the mast may not handle the same load at the far end of the jib. |
| Working radius and jib length |
Required coverage, including the farthest pick point and any areas that must remain clear. |
Jib lengths vary substantially by model and configuration. Check the manufacturer’s load chart, minimum operating radius, and permitted luffing angles. |
Insufficient reach can create extra crane moves or require a second lifting solution; excessive reach may increase structural and clearance demands. |
| Oversailing and air-right restrictions |
Whether the jib or load may pass over neighboring property, roads, railways, or occupied buildings. |
Luffing cranes can reduce the jib’s out-of-service slewing radius by raising the jib, but they do not automatically eliminate oversailing or permit unrestricted operation. |
Property rights, permits, operating procedures, and site-specific safety controls must be resolved before crane selection. |
| Purchase or rental cost |
Compare the full commercial scope: crane, mast sections, tie-ins, climbing equipment, transport, erection, dismantling, and operator support. |
There is no reliable universal price: quotes vary with capacity, height, configuration, project duration, local labor, freight, and the included services. |
A low equipment quote may exclude significant logistics, engineering, installation, or removal costs. |
| Installation and site access |
Delivery route, unloading area, assembly space, ground-bearing capacity, and access for a mobile assist crane. |
Installation commonly requires planned deliveries, a prepared foundation or supporting structure, assembly, testing, and inspection. The sequence and duration are project- and model-specific. |
Restricted access or limited assembly space can affect both schedule and cost. Confirm the installation method before committing to a crane. |
| Foundation, ties, and structural design |
Foundation reactions, mast configuration, building tie locations, and loads in operating and out-of-service conditions. |
Design values must come from the selected crane’s documentation and be checked against the actual ground and supporting structure by qualified professionals. |
These requirements can drive substantial civil or structural work and may constrain crane height, climbing sequence, or location. |
| Power and operating requirements |
Available electrical supply, duty cycle, control system, operator access, and required lifting speeds. |
Electrical ratings and performance are model-specific. Confirm site supply, protection, cable routing, and any backup or emergency-lowering provisions. |
Inadequate power planning can delay commissioning or limit crane performance during operations. |
| Wind and out-of-service position |
Operating wind limits, storm procedures, wind monitoring, and the manufacturer’s required parked configuration. |
Limits and parking instructions must follow the crane manufacturer’s manual and the site’s approved lifting plan; local exposure and installation height also matter. |
Correct weather planning is essential for safe operation and can affect work availability and project sequencing. |
| Inspection and preventive maintenance |
Inspection intervals, service access, spare-parts availability, maintenance records, and qualified technician coverage. |
Inspections and maintenance should follow applicable regulations, the manufacturer’s instructions, and the site’s documented maintenance program. |
Regular checks help identify wear or faults in components such as ropes, brakes, limit devices, electrical systems, and structural connections. |
| Long-term ownership or rental cost |
Budget for planned servicing, repairs, consumables, inspections, downtime, transport, erection, and dismantling. |
Compare the total project cost over the required period rather than the purchase price or monthly rental rate alone. |
For a short project, rental may reduce ownership and resale exposure; for repeated or long-duration use, ownership economics depend on utilization and service capacity. |
| Selection decision |
Validate the crane against a lift schedule, site layout, structural design, and installation plan. |
Request a model-specific load chart, foundation reactions, tie-in requirements, wind limits, installation scope, maintenance plan, and itemized quotation. |
This makes competing proposals more comparable and helps uncover technical or cost exclusions before procurement. |