A comprehensive guide to selecting and using tracked access platforms for tree work
Spider lifts, also known as tracked access platforms, offer several features that make them exceptionally suitable for arborist and tree work. These machines combine significant reach, stability on uneven terrain, and compact dimensions for accessing confined spaces—all crucial requirements for professional tree surgeons.
Arborists frequently need to access elevated portions of trees. Spider lifts provide substantial maximum working heights, typically ranging from 12m to 52m depending on the model. They also offer horizontal outreach, allowing access to different areas of the tree canopy without repositioning the base unit. Some models provide variable outreach depending on the weight in the basket.
Navigating the intricate branch structure of trees often necessitates the ability to reach over obstacles. Certain spider lifts are designed with an "up & over" capability to facilitate clearing obstructions at height. Articulated booms are particularly adept at achieving this type of access, making them ideal for complex tree structures.
For some tree work tasks, accessing areas below ground level or on slopes might be required. Certain spider lifts offer negative reach capabilities, allowing operators to safely work on trees positioned on embankments or in situations where the base is positioned higher than the work area.
When selecting a spider lift for tree work, prioritize models with greater articulation rather than just maximum height. The ability to maneuver around branches and position precisely is often more valuable than simply reaching the highest point.
Spider lifts are engineered to be compact for transportation and to gain entry to restricted spaces. Many models have narrow widths (as little as 0.8m), allowing them to pass through standard garden gates and navigate between buildings. Adjustable track width systems are available on some machines, enhancing their ability to manoeuvre in tight spaces and improve stability once in position.
Tree work often occurs on irregular terrain. Spider lifts are equipped with features to ensure stability in such conditions:
Always check the ground conditions before deploying a spider lift for tree work. Even the most capable machines have limitations, and soft or waterlogged ground may require additional ground protection mats to prevent sinking or instability.
The basket must be large enough to accommodate the arborist and their tools. Most models feature baskets with typical dimensions of 0.8m x 1.4m and can generally carry a maximum load capacity of 200-230kg. Basket rotation is also a common feature, providing better positioning within the tree without moving the entire boom.
A wide range of turret rotation (typically 360° to 720°) allows the arborist to access a larger working area without needing to reposition the entire machine. Some models offer non-continuous rotation, while others provide unlimited continuous rotation for maximum flexibility.
Many spider lifts offer dual power options (bi-energy), such as:
Many spider lifts are operated via remote control, often with digital displays showing machine status and position. This allows for precise positioning of the platform and can be particularly useful when navigating through complex tree structures.
Certain manufacturers offer specific accessories beneficial for arborists:
When hiring or purchasing a spider lift for arboricultural work, specifically ask about "tree care packages" that many manufacturers offer. These bundled options include multiple features designed specifically for the challenges of tree work.
When selecting a spider lift for tree work, consider these critical factors:
Always ensure the spider lift has:
Operating a spider lift for tree work requires proper training and certification:
IPAF certification alone may not be sufficient for arboricultural work. Consider additional training that specifically addresses the challenges of using MEWPs for tree work, including emergency rescue procedures.