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Spider lift technical insights

Practical reading on outrigger loading, power options, narrow access and how to read a spider lift’s working envelope.

Outrigger point loading and spreader pads

Look at the maximum individual outrigger load for the exact machine and setup. Ground-bearing capacity, pad stiffness and support beneath the surface all affect whether a setup is suitable. A competent person should assess the load path where a floor, cellar or suspended slab is involved.

Lithium, mains electric and diesel

For indoor work, establish the site’s restrictions and ask which machine functions are available in the proposed power mode. For battery models, confirm charging access and discuss the expected use between charges. For mains models, check the voltage, current and cable route with the supplier and site team.

Planning a route under 800 mm wide

Measure actual clearances from delivery to setup, including the approach to narrow openings. A manufacturer’s transport width is only one dimension. Length, turning room, overhead clearance and surface conditions may rule out a machine that fits through the opening on paper.

Reading the working envelope

To compare high-reach machines, mark your work position and obstructions on a sketch, then read each manufacturer’s working envelope at the required load and setup. Check the movement space for the boom and chassis. Follow the manufacturer’s operating limits, including the applicable wind rating.

Further reading