Tower Crane Specifications
The figures below describe typical industry specifications for this class of equipment rather than a single fixed model. Use them to scope a requirement, then confirm exact figures against the supplied unit before purchase.
| Specification | Typical value |
|---|---|
| Tip capacity | 1.5–12 t at maximum jib |
| Maximum capacity | 6–20 t close in |
| Jib length | 40–70 m typical |
| Hook height | 30–80 m free-standing, more when tied |
| Type | Flat-top or hammerhead, saddle-jib |
| Foundation | Cast-in anchors on a designed concrete base, or ballast chassis |
| Power | 400 V 3-phase 50 Hz, 30–80 kW |
| Wind limit | Out of service weathervaning; in-service typically 12–14 m/s |
| Erection | Mobile crane assist plus manufacturer climbing procedure |
What a Tower Crane Is Used For
- Building and civil construction
- Gold-plant steel and tank erection
- Precast and formwork handling
- Mine infrastructure and camp construction
- Port and industrial yard lifting
Maintenance Schedule
Most premature failures in this equipment class trace back to a missed routine check rather than a design fault. The intervals below are a practical starting schedule; adjust them to your duty cycle and the manufacturer manual.
| Interval | Task |
|---|---|
| Daily | Function test of hoist, trolley, slew and all limit switches; inspect wire rope and hook latch. |
| Weekly | Tower-bolt torque sample; inspect climbing frame and ties; check weathervane function. |
| Monthly | Full rope inspection to ISO 4309; brake air-gap; slew-bearing grease. |
| Quarterly | Structural inspection of jib and tower; foundation settlement check. |
| Annually | Thorough examination by a competent person; load test after any climb or modification. |
Frequently Asked Questions
How is tower-crane capacity quoted?
As a load chart: maximum lift close to the tower, falling as radius increases. Tip capacity at maximum jib is the number that actually limits most pours and steel lifts. A “12-tonne crane” that is 12 t at 15 m and 2 t at 60 m will not place a tank at the far corner of the pad. Size on the heaviest load at the greatest radius, not on the headline tonne rating.
Do I need a permit to erect a tower crane in Tanzania?
Erection and operation fall under occupational safety regulation and usually require a designed foundation, a competent-person erection plan and, in urban areas, additional local-authority approvals for oversail. Confirm OSHA Tanzania and municipal requirements before mobilising. Oversail of a public road or neighbouring plot is a legal issue, not just a site convenience.
When must a tower crane be climbed or tied?
When free-standing height exceeds the manufacturer’s chart for the in-service wind and the foundation used. Ties to the structure restore capacity as the building rises. Climbing or tying without following the manufacturer procedure is a common and serious failure mode.
Supply and Delivery Across Tanzania
Bart Mining supplies tower crane and related equipment to mining operations throughout Tanzania, with primary coverage of the Lake Victoria Goldfields (Mwanza, Kahama, Geita, Shinyanga and Bukombe), alongside the Lupa Goldfields around Chunya and Mbeya, and delivery nationwide from Dar es Salaam.
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