SQ6.3SA3T Marine Crane on a Harbour Quay in Ecuador

A yellow telescopic crane standing on the edge of a harbour quay, its boom stretched out over turquoise water and moored boats: photos and a video from our customer in Ecuador show a BOB-LIFT SQ6.3SA3T telescopic marine crane installed as a quay crane.

At a glance: SQ6.3SA3T 6.3 t telescopic marine crane · Ecuador · pedestal on a harbour quay · 2 customer photos and 1 video.

What the photos and video show

• The crane. A yellow crane on a round pedestal at the edge of a concrete quay. The boom is marked BOB-LIFT and SQ6.3S, and the extension sections are dark blue.
• Installation work. In one photo a worker in a welding helmet works at the base of the crane, with green and red gas cylinders beside the column.
• Over the water. The second photo shows the boom fully extended and level over the harbour. A small boat with passengers lies below it, and motor yachts are anchored behind.
• The video. A one-minute clip shows the crane with its boom raised steeply and a worker at its control station, while a large rusty anchor hangs from a hook block and is lowered towards the quay beside a blue steel frame.

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

SQ6.3SA3T specifications

The SQ6.3SA3T is a 6.3 t telescopic boom marine crane with a maximum lifting moment of 15.75 t·m and three boom sections. 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 SQ6.3SA3T lifts 6,300 kg at 2.5 m but only 1,200 kg at 8.6 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.

Raising the boom brings the hook closer in and the rating up: at 60° with the boom fully extended, the crane is rated for 2,200 kg at 4.52 m.

The SQ6.3SA3T product page has the full drawings, and other models of this size are on the 6.3 t telescopic boom marine crane page. A smaller telescopic marine crane works on pontoons in our delivery record from Australia, and a truck crane sets a generator in our record from Ecuador.

A marine crane on a harbour quay

A marine crane does not have to stand on a ship. On a quay it lifts goods and gear in and out of the boats that come alongside. Four points to plan for:

1. Anchor the pedestal in concrete. The 680 × 680 mm base plate needs a pedestal fixed into a foundation that can take the full 15.75 t·m moment, not only the 1,940 kg crane weight.
2. Read the chart at the boat, not the quay edge. A boat lies a few metres out from the pedestal. At 6.4 m the rating is 1,800 kg; at full reach it is 1,200 kg.
3. Allow for the tide and the swell. A boat that rises and falls changes the hook height during the lift. Keep tag lines on the load and lift only when the boat is held steady.
4. Keep people clear. Passengers and crew should be out of the boat, or well away from the load, before it swings over them.

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 telescopic boom marine crane range, and the marine crane buying guide covers mounting in more detail.

What to send us for a marine crane

To check a crane like the SQ6.3SA3T for your quay or vessel, 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 SQ6.3SA3T needs 40 L/min at 20 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 video and the technical department's drawings.