1. Overview

A knuckle boom crane truck, also known as an articulated crane truck or lorry loader, is a truck equipped with a hydraulic folding boom crane. Unlike traditional straight telescopic cranes, the knuckle boom features articulated "knuckle" joints that allow the arm to fold like a human finger . This design provides exceptional flexibility, compact storage, and the ability to maneuver around obstacles while lifting.

Knuckle boom crane trucks combine transportation and lifting functions into a single vehicle, eliminating the need for separate crane trucks to lift materials off delivery vehicles. They are widely used in construction, logistics, utilities, tree removal, oilfield services, and material delivery industries .

2. Key Features

• Articulated folding boom – Multiple knuckle joints allow the crane to bend and reach around obstacles, unlike straight boom cranes

• Compact storage – The boom folds neatly behind the cab, leaving the truck body fully usable for cargo

• High lifting capacity – Capacities range from under 10,000 ft-lbs to over 1,000,000 ft-lbs

• Long reach – Horizontal outreach from 30 ft to over 150 ft depending on model

• Radio remote control – Operator can stand at the load point for precise placement, improving safety and efficiency

• 360° continuous rotation – Full slewing capability for flexible positioning

• Hydraulic outriggers – Provide stability during lifting operations

• Quick setup time – Modern assistance systems allow rapid unfolding and stabilization

• Versatile attachments – Augers, personnel baskets, pallet forks, rope winches, rotators, grippers

3. Specifications (Representative Models)

Small/Medium Class (Typical Distribution)

Heavy Duty Class – HIAB iQ.708 HIPRO

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Heavy Duty Class – Palfinger 110002 (Oilfield Application)

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Large Class – BIK FC-92

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Chinese Model – Shacman 8x4 with 40t Crane

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4. Key Technologies & Assistance Systems

5. Applications

6. Mounting Configurations

7. Optional Attachments

8. Buying Guide

8.1 How to Size a Knuckle Boom Crane

The two most important questions for selecting the right crane :

1. Maximum weight to lift – What is the heaviest load?

2. Maximum radius – How far out from the truck does the load need to be placed?

Example:

• Precast company: 25,000 lb septic tank placed 20 ft away → Select crane that handles this combination

• Monument company: 4,000 lb headstones at 15 ft → Can use lighter crane on Ram 5500 chassis

8.2 Key Selection Factors

8.3 Leading Brands

9. Delivery & Service