SQ10ZA4 Crane Load Test on a 6x6 Truck in Uzbekistan

Stacks of steel plates hanging on chains from a red boom: photos and videos from our customer in Uzbekistan show a BOB-LIFT SQ10ZA4 knuckle boom crane being load tested on a 6x6 truck chassis.

At a glance: SQ10ZA4 10 t knuckle boom crane · Uzbekistan · 6x6 truck chassis · 18 customer photos and 5 videos.

What the photos and videos show

• The truck. A white cab-over truck with three axles and off-road tyres. No body is fitted yet, so the bare frame is visible behind the crane.
• The crane. The red crane, marked BOB-LIFT and SQ10Z on the boom, has black extension sections. It is mounted behind the cab, with outriggers out on both sides.
• The test load. Stacks of steel plates hang from the hook on chains. The boom lifts them at different heights and reaches, both raised steeply and stretched out low.
• Outriggers on blocks. Each outrigger foot stands on a wooden block on the concrete.
• Two places. Some photos are taken in an open yard beside a yellow gantry crane, others inside a large factory hall. Workers in work clothes watch from a distance.
• The videos. Short clips show the boom lifting, slewing and lowering the plate stack.

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

SQ10ZA4 specifications

The SQ10ZA4 is a 10 t knuckle boom truck-mounted crane with a maximum lifting moment of 21 t·m. Reach and load figures are read from the technical department's load chart drawing; the hydraulic figures come from the BOB-LIFT brochure.

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 SQ10ZA4 lifts 10,000 kg at 2 m but only 1,880 kg at 10.5 m. Outrigger span is the width between the outrigger feet when they are fully out. Set them on firm, level ground, such as concrete or compacted gravel, before each lift. For ground and outrigger rules, see the OSHA cranes and derricks standard.

At 6.43 m from the slewing centre the crane is rated for 3,150 kg; at 8.45 m it is 2,350 kg.

The SQ10ZA4 product page has the full drawings. The same model stands ready for shipment in our delivery record from Morocco, and a 12 t crane from the same range sets a silo in our record from Argentina.

Load testing a crane before it goes to work

A load test with known weights shows that the crane, the mounting and the truck frame work together before the first real job. The photos show the usual way to do it. Four points to follow:

1. Use known weights. Steel plates or test blocks of known mass make the test load clear. Count the chains and hook as part of the load.
2. Test at more than one radius. A load near the column checks the top rating. A lighter load far out checks the moment: 2,350 kg at 8.45 m and 1,880 kg at 10.5 m.
3. Firm footing for every outrigger. Put blocks or pads under the outrigger feet, as in the photos, and level the truck before the first lift.
4. Keep the area clear. Nobody stands under the load or the boom during the test. Watch the frame, the mounting bolts and the outriggers as each load comes up.

How we fit cranes to customer chassis is on the mounting and shipping page. Every model around 10 t is listed on the 10 ton crane page, and other capacities are in the knuckle boom truck mounted crane range.

Checking a truck for the SQ10ZA4

Before you order, check three things on your truck. They decide whether the SQ10ZA4 fits it.

• Payload. The crane weighs 3,350 kg. Take this off the truck's payload, then plan the body and the loads you carry with what is left.
• Hydraulic power. The crane needs 40 L/min at 30 MPa, about 30 kW. The power take-off and pump on your truck must give at least this.
• Outrigger room. The outriggers span 2,310 to 5,610 mm. Make sure the frame has room for them, and that your job sites do too.

Send us the make, model and wheelbase of your truck through the contact page, and our team will check the fit.

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