SQ5ZA3T Marine Cranes on New Work Boats in Egypt

Two steel work boats taking shape on a slipway, each with a yellow knuckle boom crane behind the wheelhouse, and then one of them painted red and white on the water: 14 photos from our customer in Egypt show BOB-LIFT SQ5ZA3T knuckle boom marine cranes fitted on new work boats.

At a glance: SQ5ZA3T 5 t knuckle boom marine cranes · Egypt · new tug-style work boats · 14 customer photos.

What the photos show

• At the shipyard. Two bare steel hulls stand side by side on a slipway among palm trees, with ladders and scaffolding along their sides. On each, a yellow crane is folded behind the wheelhouse.
• Fitting the crane. In one photo two workers fit a crane on the deck next to an open hatch, with welding cables across the steel plate.
• The crane up close. The boom is marked BOB-LIFT and SQ5Z. The crane sits on a raised pedestal, with an operator seat and a short ladder fixed beside the column.
• The finished boat. Later photos show the boat painted red with a white wheelhouse, tyre fenders and a timber deck. An orange power unit cabinet stands on the deck near the crane.
• On the water. The boat moves across calm water with a town on the far shore, flying the Egyptian flag.

These are the customer's own photos. No load weights, dates or comments came with them.

SQ5ZA3T specifications

The SQ5ZA3T is a 5 t knuckle boom marine crane with a maximum lifting moment of 10.5 t·m. All figures are read from the technical department's dimension and load chart drawings.

Lifting moment is the load times its distance from the slewing centre. That is why the rated load drops as the boom reaches out. For example, the SQ5ZA3T lifts 5,000 kg at 2.1 m but only 1,100 kg at 8.05 m. Working radius is the level distance from the slewing centre to the hook. On a vessel or a quay, the pedestal takes the place of outriggers. It must be strong enough for the crane's weight and its full lifting moment. For general crane safety rules, see the OSHA cranes and derricks standard.

At 4.45 m from the slewing centre the crane is rated for 2,350 kg; at 6.2 m it is 1,600 kg. Folded, it is 2,321 mm long, 2,261 mm high and 712 mm wide, so it fits in the space behind a wheelhouse.

The SQ5ZA3T product page has the full drawings, and other models of this size are on the 5 t knuckle boom marine crane page. The same model works on a river work boat in our delivery record from Bangladesh, and a 6.3 t marine crane with a winch works on a vessel in our record from Russia.

Fitting a crane while the boat is built

Fitting the crane in the shipyard is easier than adding it later, because the deck is still open and unpainted. Four points to plan for:

1. Reinforce the deck first. The 680 × 680 mm base plate should sit on a raised pedestal welded to stiffeners below deck, sized for the full 10.5 t·m moment.
2. Place the power unit close. Keep the hydraulic lines between the power unit and the crane short, and route them where crew will not step on them.
3. Give the operator a clear view. A seat on the pedestal puts the operator above the deck rails, so the hook and the load stay in sight.
4. Test after launch. Once the boat is afloat, run every crane function without a load and check all fittings for leaks before the first lift.

Sea water is hard on steel, so the marine cranes get an epoxy zinc primer with a polyurethane acrylic top coat. Other capacities are in the knuckle boom marine crane range, and the marine crane buying guide covers deck mounting in more detail.

What to send us for a marine crane

To check a crane like the SQ5ZA3T for your boats, we need a few details. Short answers are fine.

• The site. The vessel type and length, or the quay, and where the crane will stand.
• The lifts. The heaviest load, and how far from the crane it is picked up and set down.
• The power. The hydraulic power pack you have now, or whether you need a new one. The SQ5ZA3T needs 35 L/min at 28 MPa, about 22 kW.

Send these through the contact page, and our team will check reach and load against the chart.

Record compiled by Achord Chan, Product Operations Director at BOB-LIFT, from the customer's photos and the technical department's drawings.