Mini Crane Hire

Mini crane hire in London solves the access problem that defeats every other crane type. When the load needs to reach a basement plant room, an internal building void, a narrow rooftop or a confined courtyard that no conventional machine can enter, a spider crane or compact crawler crane is the answer. London Crane Hire has operated mini cranes across the capital since 2008, serving building services contractors, facilities management companies, specialist fit-out contractors and refurbishment teams who encounter this access challenge on a daily basis.

This page covers the mini crane types we operate, their key capabilities, the applications where they are most frequently deployed in London, and the technical detail you need to assess whether a mini crane is the right solution for your specific job.

Mini Crane Types We Operate

Spider Cranes

Spider cranes are the defining product in the mini crane category. Named for the four articulated outrigger legs that splay outward to create a stable lifting platform, spider cranes combine a very narrow transport width, typically 700 to 850mm on compact models, with lifting capacities from 400 kg to 6 tonnes. The outrigger legs can be extended to different lengths on each side independently, allowing the crane to level itself on uneven surfaces including stairs, ramps and the edge of excavations.

Our spider crane fleet includes units that fold to 750mm wide for passage through standard single doorways, making them genuinely practical for interior building access. Once in position, outriggers extend to provide a stable base and the telescoping boom deploys to reach the required height. All our spider cranes are remotely operated, allowing the operator to stand in the safest available position during the lift rather than being physically attached to the machine.

Compact Crawler Cranes

Compact crawler cranes offer higher capacity than spider cranes in a similarly accessible format. Travelling on narrow rubber tracks, these machines can enter buildings through double doors, travel over finished flooring with appropriate protection and operate in areas with low overhead clearance. Our compact crawler fleet covers 1 to 8 tonnes capacity and includes units with maximum hook heights of up to 25 metres, which is sufficient for internal lifts within most commercial building voids.

Compact crawlers are the preferred option for roof access work in Central London, where restricted roof space prevents the use of larger equipment. The machine accesses the roof via a goods lift or external hoist, then operates from the roof surface with rubber pad outriggers that protect the waterproofing membrane.

Why Mini Cranes Are Essential in Dense Urban London

London's built environment creates access constraints that simply do not exist on open construction sites. The city's Victorian and Edwardian building stock was designed around building services plant that is now obsolete. Replacing a boiler, chiller, cooling tower or transformer in an existing building means navigating the routes available within the structure: service lifts, plant room doors, access hatches and stairwells.

The alternative to a mini crane in these situations is either hand-balling the plant in pieces, which is time-consuming, physically demanding and sometimes simply impossible for large equipment items, or cutting an access opening in the building structure, which is disruptive and expensive. A mini crane that can enter the building through an existing opening and provide a controlled mechanical lift is almost always the faster and more cost-effective solution.

Key Applications

Basement Plant Room Lifts

Basement plant rooms present one of the most challenging access scenarios in urban building services. The plant is below ground level, the room is often accessed by a vehicle ramp or a set of steep stairs, headroom within the plant room may be as low as three metres, and the floor-loading capacity of the approach route must support the combined weight of the crane and the heaviest plant item it will carry.

Our team carries out a detailed access survey before every basement plant lift, checking door and ramp dimensions, floor loadings, headroom at critical points and the sequencing of the lift to navigate the route from entry point to final set-down position. This survey is included as part of the free pre-lift assessment.

Roof Gardens and Roof Terraces

Roof gardens and terraces across London's commercial and residential buildings regularly require the installation and replacement of heavy items: planters, paving slabs, outdoor furniture, BBQ equipment, hot tubs and rooftop plant enclosures. Access for a conventional crane from street level is often impossible due to overhang restrictions, airspace limitations and the need to lift over the building's parapet.

Spider cranes are lifted to the roof level by a goods hoist or a separate mobile crane, then operate independently once on the roof. The remote control capability means the operator can stand away from the crane at the best vantage point to guide each piece into position.

Internal Plant Lifting and Equipment Replacement

Mechanical and electrical contractors carrying out M&E maintenance programmes regularly encounter plant items that are too heavy to hand-ball but too bulky to pass through building openings in a conventional way. Air handling units, fan coil units, chillers and switchgear all fall into this category. A mini crane provides a controlled mechanical lift that protects both the equipment and the building's fabric during the move.

Underground and Basement Construction

Civil engineering contractors working on London Underground infrastructure, utility tunnels and underground car park construction use mini cranes for materials and plant handling in confined underground environments. The low clearance profile of compact crawler units, combined with the ability to travel on rubber tracks without damaging concrete floors, makes them the practical tool of choice in these environments.

Technical Specifications and Operating Parameters

When planning a mini crane operation, the critical parameters are transport width, working height, maximum safe working load at the required radius, outrigger footprint in working configuration, maximum floor loading under outrigger pads and minimum headroom clearance at entry points and at maximum hook height.

Our engineering team produces a full load schedule and access route assessment for every mini crane operation. We calculate the loads imposed on the floor structure under the outrigger pads and confirm that these are within the structural capacity of the floor. Where there is any uncertainty about floor loadings, we recommend commissioning a structural engineer's assessment before the lift proceeds.

To discuss a mini crane requirement or arrange a free site survey, contact our team or submit an enquiry online.

Frequently Asked Questions

What is the smallest door a spider crane can pass through?

Our most compact spider cranes fold to 750mm wide, which is sufficient to pass through a standard single doorway. Many commercial and industrial buildings have access routes of 800mm to 900mm clear width through the key access points. We measure every access route on site survey to confirm the crane will fit before confirming the booking. Where the route includes a tight corner or a ramp, we model the crane's turning circle and articulation to confirm feasibility.

How is the mini crane transported to upper floors or roofs?

Mini cranes access upper floors and roofs by goods lift where the lift dimensions and payload capacity permit, or by external hoist or scaffold goods hoist on sites where no suitable internal lift is available. Where even these options are not viable, the crane can sometimes be lifted to the required level by a separate mobile crane working from street level. Our team assesses the access route on every site survey and recommends the most practical and cost-effective method.

Can you provide a LOLER-compliant lift plan for a mini crane operation?

Yes. All lifting operations, including mini crane lifts, are subject to LOLER 1998. We produce a full lifting plan and method statement for every mini crane operation, covering the lift sequence, crane configuration, outrigger positions and loading, communication arrangements and emergency procedures. A CPCS-certified operator carries out a pre-use inspection of the machine before every shift and records the inspection in the daily plant check sheet.