SQ2SA3T 2 t Marine Crane on a Vessel Platform in Peru

A red telescopic crane on a raised platform with railings, its boom held out over the sea with ships at anchor on the horizon: a photo from our customer in Peru shows a BOB-LIFT SQ2SA3T telescopic marine crane on board a vessel.

At a glance: SQ2SA3T 2 t telescopic marine crane · Peru · raised platform on a vessel · 1 customer photo.

What the photo shows

• The platform. The crane stands on a red pedestal on a small raised platform, surrounded by white tubular railings.
• The crane. The red boom is marked BOB-LIFT and SQ2S, with a NO STANDING UNDER THE BOOM warning. The hook block is painted in red and black stripes, and a black sling hangs from the hook.
• Next to the column. A unit wrapped in blue plastic sheet and tied with rope sits at the foot of the crane.
• The sea. Calm grey water stretches out under an evening sky, with cargo ships at anchor and hills along the coast.

This is the customer's own photo. No load weights or comments came with it.

SQ2SA3T specifications

The SQ2SA3T is a 2 t telescopic boom marine crane with a maximum lifting moment of 4.2 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 SQ2SA3T lifts 2,000 kg at 2.0 m but only 250 kg at 8.2 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 900 kg at 4.1 m. With the boom level, the crane stands 2,030 mm high.

The SQ2SA3T product page has the full drawings and load chart. A 5 t telescopic marine crane stands on a harbour quay in our delivery record from the Maldives, and a 2 t telescopic truck crane works in our record from Trinidad and Tobago.

A light crane on a raised deck platform

A raised platform lifts a small crane above deck fittings and railings, so the boom can clear the ship's side. Four points to plan for:

1. Build the platform for the moment. The 500 × 500 mm base plate with 16 bolts needs a platform tied into the hull structure and sized for the full 4.2 t·m moment, not only the 830 kg crane weight.
2. Keep loads light at reach. The crane lifts 2,000 kg close in but only 250 kg at 8.2 m. Weigh stores and gear before you swing them over the side.
3. Size the hydraulic supply. The SQ2SA3T needs 25 L/min at 16 MPa, about 8 kW, so a small power pack is enough.
4. Stow the boom at sea. Retract the boom, lower it to its rest and secure the hook block, so nothing swings when the ship rolls.

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 deck mounting in more detail.

What to send us for a marine crane

To check a crane like the SQ2SA3T for your 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 SQ2SA3T needs 25 L/min at 16 MPa, about 8 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 photo and the technical department's drawings.