SQ8ZA4 Knuckle Boom Crane Lifting Inside a Factory in Mexico

A white flatbed truck parked inside a factory hall, its black crane reaching up into a steel structure: photos from our customer in Mexico show a BOB-LIFT SQ8ZA4 knuckle boom crane lifting parts onto a raised platform.

At a glance: SQ8ZA4 8 t knuckle boom crane · Mexico · flatbed trucks, indoor and street work · 5 customer photos.

What the photos show

• The truck. A white International truck carries a long flat deck. The black crane stands behind the cab, with an outrigger leg set down on the painted factory floor.
• Inside the hall. The truck is parked under a high steel roof, next to a two-level steel structure with yellow stairs and handrails. A forklift and pallets stand nearby.
• Lifting to the platform. In one photo the boom reaches up past the upper level, with a worker standing on the platform. In others the crane holds a long grey frame beside the structure while workers on the platform reach for it.
• On the street. One photo shows a crane of the same type on a white Hino flatbed truck, lifting a forklift on slings. Its outrigger stands on timber blocks.

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

SQ8ZA4 specifications

The SQ8ZA4 is an 8 t knuckle boom truck-mounted crane with a maximum lifting moment of 16.7 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 SQ8ZA4 lifts 8,000 kg at 2 m but only 1,420 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 4.46 m from the slewing centre the crane is rated for 3,700 kg. At 6.45 m it is 2,470 kg, and at the full 10.5 m reach it is 1,420 kg.

The SQ8ZA4 product page has the full drawings. The same model sets a generator on its base in our delivery record from Ecuador. Also in Mexico, a 6.3 t knuckle boom crane handles steel coils in our SQ6.3ZA4 record.

Lifting inside a building

A truck crane working indoors has a roof, lights and steel members around it, and people working at height. Three things to plan for:

1. Check the headroom. With the boom raised, the tip can reach about 13 m. Measure the clear height under roof beams, lights and cable trays, and plan the boom movement so it stays below them.
2. Outriggers on the slab. Set the outriggers on solid concrete, clear of pits, drain covers and slab joints. They span 2,310 to 5,610 mm, so mark out the area before the truck parks.
3. Hand-over at the platform. Agree how the load is passed to people on the upper level. Use a tag line, keep the platform crew back until the load is still, and use one signaller.

Other capacities are in the knuckle boom truck mounted crane range, and every model around 8 t is listed on the 8 ton crane page.

Checking a truck for the SQ8ZA4

Before you order, check three things on your truck. They decide whether the SQ8ZA4 fits it.

• Payload. The crane weighs 3,050 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 28 MPa, about 25 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, the technical department's drawing and the BOB-LIFT brochure.