Not all elevated work platforms (EWPs) are created equal. While scissor lifts are an excellent solution for many jobs, there are times when you need more flexibility, reach, or manoeuvrability—and that’s where articulating knuckle-booms come into their own.
If you’re in construction, maintenance, signage, or any trade where access can be tricky, understanding when to choose a knuckle-boom over a scissor lift can make all the difference in safety, efficiency, and cost-effectiveness.
1. You Need to Reach Over or Around Obstacles
The biggest advantage of a knuckle-boom (also called an articulating boom lift) is its multi-jointed boom arm, which allows it to:
- Reach up and over awnings, structures, or equipment
- Access behind or around barriers
- Navigate complex or congested sites
Perfect for:
- Tree lopping around fences or sheds
- Sign installation on buildings with awnings
- Maintenance on roofs or high walls behind fixed obstacles
- Cleaning or painting over garden beds, pipes, or parked vehicles
Why it wins:
Scissor lifts only move vertically. If you can’t get the base directly under the work area, you’re stuck. Knuckle-booms solve that with incredible reach flexibility.
2. You’re Working on Uneven or Outdoor Terrain
Rough terrain? Uneven ground? No problem. Knuckle-booms are built with:
- All-terrain tyres
- Outriggers or stabilisers
- Four-wheel drive (on many models)
They’re designed for outdoor, off-slab, and remote work sites.
Common uses:
- Building construction
- Tree trimming and landscaping
- Mining and industrial maintenance
- Utility pole or light pole access
Why it wins:
Electric scissor lifts are designed for flat, solid ground. Take them into rough terrain and you’ll risk tipping, getting bogged, or damaging the machine.
3. You Need Extended Horizontal Reach
Articulating boom lifts provide both vertical height and horizontal reach, making them ideal when:
- You can’t position the base of the lift directly under the job
- You need to work across a roofline, mezzanine, or production line
- You’re accessing upper floors of a building without blocking entryways
Why it wins:
Knuckle-booms often offer several metres of outreach, allowing access in tight spots or when ground space is restricted.
4. Height Is a Priority
Scissor lifts typically top out at around 10–12 metres for electric models, and up to 18–20 metres for diesel models. But articulating booms? They can soar up to 30 metres or more—with outreach to match.
Perfect for:
- Multi-storey buildings
- Tall signage or lighting installations
- Industrial facility maintenance
- Large-scale painting and facade work
Why it wins:
When you need to go high and stay mobile, knuckle-booms outperform scissor lifts every time.
5. You’re Working in Complex Layouts
Whether it’s a narrow laneway, crowded construction zone, or a tight outdoor courtyard, the flexibility of an articulating boom gives you options. Operators can:
- Navigate around structures
- Approach from different angles
- Adjust position mid-air with precision articulation
Why it wins:
Scissor lifts are great on a wide-open slab—but less helpful when a fence, planter box, or another lift is in the way.
When NOT to Choose a Knuckle-Boom
Knuckle-booms aren’t always the answer. They’re generally:
- More expensive to hire
- More complex to operate (some require high-risk work licences)
- Bulkier and heavier, making them harder to transport or manoeuvre indoors
If your job involves basic vertical access on a flat surface, or working indoors where space is limited, a scissor lift is often the simpler and cheaper solution.
The Verdict: Knuckle-Booms for Reach, Agility, and Terrain
An articulating boom lift gives you the freedom to work around real-world obstacles. For outdoor trades, construction, or any scenario that demands reach and flexibility, it’s the EWP of choice.
If you’re trying to decide what lift is right for your job—or your hire business—ScissorHire.com lets you compare scissor lifts, boom lifts, and knuckle-booms in your area. With instant listings and direct contact to the equipment owner, it’s the easiest way to find what you need.