8 Ton Telescopic Boom Marine Crane

Where the 8 ton SQ8SA4T fits

The SQ8SA4T has a four-section telescopic boom with the hook at the boom head, so it suits deck cargo, barge work and quay handling where the lift stays above deck level. With a self weight of 3,100 kg and a Ø1,000 mm base plate, it is meant for barges, cargo vessels and quays with a strong, engineered pedestal.

With the boom fully extended and raised to 75°, the SQ8SA4T still lifts 2,800 kg at 3.2 m, which helps when the load has to clear a bulwark, a deck house or a quay edge close to the crane.

Rated capacity always depends on radius. At 8 m the SQ8SA4T lifts 2,000 kg and at 11 m it lifts 1,300 kg, so check the weight of your heaviest regular load at the distance you need before you choose a tonnage.

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 SQ8SA4T load chart.

Load at each radius

Figures from the SQ8SA4T load chart with the boom horizontal. Do not lift more than the chart shows at your working radius. Download the SQ8SA4T load chart (PDF)

Deck mounting dimensions

These figures come from the SQ8SA4T dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 3,100 kg self weight and its 20 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ8SA4T dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ8SA4T 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 and pins on schedule, and check hoses and fittings for corrosion.

Warranty and service

BOB-LIFT covers the whole crane for 12 months. Common spare parts leave the factory within 48 hours, and our service team answers within 12 hours and can guide repairs by video. Cranes ship from Lianyungang, Qingdao or Shanghai.

All telescopic boom marine cranes · How to choose a marine crane

Where the 8 ton SQ8SA5T fits

The SQ8SA5T has the longest reach of our telescopic marine cranes below 16 t: five boom sections reach 18.5 m. At that radius it lifts 400 kg, and 8,000 kg close in. It suits wide barges, quays and cargo vessels where loads must be placed far from the crane, for example across a moored boat.

Need a folding boom instead? Compare the 8 ton knuckle boom marine crane (SQ8ZA6TJ).

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 SQ8SA5T load chart and the deck space the boom and its rest need when stowed.

Deck mounting dimensions

These figures come from the SQ8SA5T dimension drawing. Your shipyard or naval architect designs the pedestal and the deck reinforcement for the crane’s 3,250 kg self weight and its 20 t·m maximum lifting moment.

We can adapt the mounting to your vessel’s deck, for example by changing the pedestal height. Download the SQ8SA5T dimension drawing (PDF)

Corrosion protection for sea duty

The T in SQ8SA5T 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.

From our customers

A customer in Brazil has sent videos of the earlier SQ8SA4T configuration. See their photos under Customer feedback

All telescopic boom marine cranes · How to choose a marine crane