4 Ton Telescopic Boom Marine Crane

Where the 4 ton SQ4SA3T fits

The SQ4SA3T is a compact telescopic marine crane: 4,000 kg at 2.5 m, 950 kg at 8.0 m and a 10 t·m lifting moment. Its base plate is a long, narrow 1,030 × 660 mm, which helps along a deck edge or a narrow quay strip. It suits workboats, barges and small quays that need more capacity at mid radius than the 3.2 t model.

Need a folding boom instead? Compare the 4 ton knuckle boom marine crane (SQ4ZA3TJ).

We size a marine crane by the load and the radius you need, not by vessel length. Send us the heaviest load, the furthest point it must reach and a deck drawing, and we check them against the SQ4SA3T load chart and the deck space the boom and its rest need when stowed.

Deck mounting dimensions

These figures come from the SQ4SA3T dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 1,500 kg self weight and its 10 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ4SA3T dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ4SA3T marks the marine version, which receives a multi-layer anti-rust treatment for salt air and spray. How long a crane lasts in a harbour still depends on routine care: rinse it with fresh water after salt-water work, grease the slewing bearing, the boom pins and the slide pads of the telescopic sections on schedule, and check hoses and fittings for corrosion.

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