Carrying out glazing projects efficiently: mini cranes and vacuum lifters from Luibl Rental

Glass facades, steel-and-glass structures and laminated panes for atriums, office towers and factory halls today rarely weigh less than 500 kilos. Triple glazing in an aluminium frame for a standard-size office building quickly reaches 380 to 600 kg per element, and special panes for lobbies and showrooms regularly exceed 800 kg. Anyone who has to move such loads to the installation position on the fifth floor via a stairwell or across a courtyard will fail with a mobile crane because of the set-up area, with an aerial work platform because of the load capacity, and with muscle power because of well-being at work legislation.

The answer lies in combining a mini crane with a vacuum lifter - two machines that each have their own speciality and together become the only economical solution as soon as the site is cramped, the ground sensitive and the load demanding. Luibl Rental has a coordinated rental offer ready for exactly this application profile. The mini crane fleet is based on the Maeda range, with models from the 600 mm narrow MC104C to the heavy-duty MC815C with more than 8 tonnes of load capacity. The matching vacuum technology is supplied by sister brand Uplifter within the Luibl Group - glass vacuum lifters with 1- and 2-circuit systems up to 1,200 kg load capacity, which can be hung seamlessly from the load hook of any Maeda crane.

This pillar page provides in-depth insight: which technological synergy between crane and lifter decides the success of the project? Which load capacity reserves can actually be used at which outreach? And what does practice look like for an 800 kg facade element in an inner-city setting?

A mini crane alone lifts - a glass vacuum lifter alone holds. Only the combination of both systems enables what counts in glazing: the low-contact, precisely guided positioning of large glass elements in confined conditions. Three technological properties must work together reliably between crane and attachment.

Proportional control as a prerequisite for millimetre work

The first key is the crane's proportional control. On a Maeda MK3053CB, for example, all joysticks of the radio remote control can be adjusted continuously between standstill and maximum speed. In glazing this is not a convenience feature but a basic requirement. A 600 kg laminated safety glass pane hanging from the crane tip on a vacuum lifter swings out with every jerky movement of the hoist winch - with an inertia that releases several hundred joules of kinetic energy at a swing radius of half a metre. A single contact of the swinging pane with the steel frame or an adjacent glass edge leads to breakage.

The crane's proportional radio remote control allows the operator to control lifting, lowering, slewing and boom movement in the finest speed increments. Maeda calls the system on its models 'fully proportional control with HBC radio' - an established industry standard that the operator masters precisely after a short familiarisation.

Vacuum safety circuit: 1-circuit versus 2-circuit system

On the lifter side, the number of independent vacuum circuits determines the permitted range of use. A 1-circuit system generates the vacuum with a single pump and a shared tank for all suction pads. It is light, low-maintenance and sufficient for indoor installation under supervision.

However, as soon as loads are lifted above people, traffic routes or higher than 2 metres, the dual-circuit system is the appropriate choice in line with applicable Belgian safety rules and NBN EN standards. Two completely separate vacuum circuits work with their own pumps, their own tanks and their own gauges - if one circuit fails, the second continues to hold the load securely. The Uplifter models of the UPG series from the UPG600 upwards and the Glassworker GW1125 come with this redundancy as standard, with a mains-independent battery power supply. This is the minimum standard for any external facade installation.

Pick & Carry function: moving loads while travelling

The third point of synergy is the crane's Pick & Carry function. Conventional mobile cranes set up on outriggers and lift from a standstill. A Maeda MC405C-3, by contrast, can carry a load while travelling as long as it lies within the free load chart - with the boom retracted and the machine in travel mode. This means glass elements can be brought directly from the delivery point at the site fence to the installation position, without intermediate storage or re-handling.

Combined with the low ground pressure of the rubber tracks - 0.52 kg/cm2 on the MC405C-3 - the result is a system that can cross freshly laid parquet, marble or natural stone floors in foyers and showrooms without leaving pressure marks. The combination of Pick & Carry and low ground pressure eliminates the intermediate steps that take up most of the installation time with conventional lifting equipment.

Load moment limiter: the invisible layer of protection

Every Maeda mini crane in the Luibl rental fleet has an electronic load moment limiter (LML) that compares, in real time, the product of load and radius with the permissible load moment for the boom position concerned. If the value is exceeded, the system automatically cuts the critical movement - typically further extension or lowering of the boom. On models with a knuckle boom such as the MK1033CW1 or MK3053CB, the LML also monitors the knuckle angle, because the load moment curve behaves non-linearly at the knuckle transition points, where the greatest risk of overload arises.

The LML is not a convenience feature but mandatory equipment under NBN EN 13000 and a prerequisite for the periodic inspection by an external technical inspection body (EDTC/SECT). At Luibl Rental, no mini crane leaves the depot without the LML having been verified with calibrated test weights during the periodic inspection.

Choosing the right mini crane for a glazing project is not a matter of gut feeling but a calculation with three variables: maximum load in kg, required outreach in m and lift height in m. Transport width, ground pressure and drive type come in as knock-out criteria as soon as door openings, sensitive floors or low-emission indoor areas are involved.

Maeda rental fleet at Luibl Rental - key data of the main models

Maeda MC104C - The ultra-compact indoor specialist

• Maximum load capacity: 990 kg at 1.1 m radius

• Maximum lift height: 5.5 m

• Maximum reach: 5.1 m at 200 kg

• Transport width: 600 mm - fits through standard doors and into goods lifts

• Drive: electric motor, no local emissions

• Application profile: indoor installation in lobbies, stairwells, atriums, renovated older buildings

Maeda MC174C - More power in a compact design

• Maximum load capacity: 1,720 kg

• Maximum lift height: 5.5 m

• Maximum working reach: 5.2 m

• Transport width: 590 mm

• Application profile: heavier glass elements in confined indoor spaces, steel beam installation in existing buildings

Maeda MK1033CW1 - Knuckle boom specialist with a slim body

• Maximum load capacity: 995 kg at 11.3 m lift height and 9.9 m working range

• Fully automatic knuckle boom for working over obstacles

• Transport width: 750 mm

• Application profile: glass installation behind projections, in courtyards, over roof overhangs

Maeda MK3053CB - Battery-powered professional with knuckle boom

• Maximum load capacity: 2,800 kg at 1.8 m radius

• Maximum lift height: 16.95 m

• Maximum working range: 14.3 m

• Drive: battery, fully electric, no local emissions

• Radio remote control with fully proportional operation

• Application profile: medium-weight facade installation, emission-sensitive areas, courtyards

Maeda MC405C-3 - All-rounder for outdoor sites

• Maximum load capacity: 3,830 kg

• Maximum hook height: 16.80 m

• Ground pressure: 0.52 kg/cm2 - protects sensitive surfaces

• Gradeability: 20 degrees

• Travel speed: up to 3.3 km/h

• Application profile: heavy facade elements, outdoor installation on sensitive surfaces

Maeda MC815C - Heavy-duty class

• Maximum load capacity: 8,090 kg at 2.4 m radius

• Maximum hook height: 19.6 m (optionally with hydraulic jib up to 25.5 m lift height)

• Maximum working range: 18.8 m with a 340 kg load

• Dead weight: 9,460 kg

• Application profile: large facade elements, heavy special glazing, industrial roof light strips

Knuckle transition points: what the load chart does not tell you

A frequently underestimated issue with knuckle boom mini cranes are the so-called knuckle transition points in the load chart. While the chart suggests continuous capacity curves across lift height and radius, in reality there are transition zones in which the permissible load changes abruptly - wherever the knuckle boom changes geometry (folded versus unfolded) or where the main boom passes a critical angle threshold.

In practice this means: a Maeda MK3053CB can easily lift an 800 kg load at 5 m radius, but at 5.5 m radius with the same boom angle only 650 kg, and when switching to knuckle boom operation the permissible load drops to 580 kg at an identical geometric position. The LML protects against overload, but an experienced operator plans the lifting sequence so that these transition points are not passed through in the critical load range - which prevents unwanted cut-outs in the middle of a movement.

At Luibl Rental, the handover of every knuckle boom mini crane includes a machine-specific operator instruction with the original load chart. Anyone who takes over a mini crane without this instruction takes on a risk that has no place on site.

Vacuum lifters from sister brand Uplifter - capacity classes

The vacuum technology within the Luibl Group comes from Uplifter, the German specialist in vacuum lifting equipment, which has been working with the Luibl Rental fleet on a project basis since its acquisition by the Luibl Group. The most important glass vacuum lifter models for combination with Maeda mini cranes:

Uplifter UPG350

• Load capacity: 350 kg

• Can be attached to almost any machine with a load hook

• Single-circuit system

• Application profile: standard indoor glazing, window installation

Uplifter UPG600 / UPG1000

• Load capacity: 600 kg / 1,000 kg

• Dual-circuit system with redundant vacuum supply

• Battery power supply for mains-independent operation

• Application profile: medium-weight facade elements, outdoor installation

Uplifter glass vacuum lifter UPG1200

• Load capacity: up to 1,200 kg

• Dual-circuit system with up to 12 suction pads

• Suction pads can be positioned variably with extensions

• Radio remote control with electric tilting unit

• Silicone-free suction pads (no marks on the glass)

• Application profile: heavy glass facades, laminated safety glass, special glazing

Uplifter Glassworker GW1125

• Load capacity: max. 2,000 kg

• Motorised 360-degree rotation, hydraulic 90-degree tilting

• Two independent vacuum circuits with double safety per circuit

• Reserve vacuum tank, mains-independent 12 V battery power supply

• Application profile: large-format glass facades, industrial glass, heavy metal panels

When you rent a Maeda mini crane from Luibl, you can receive the matching vacuum system from sister company Uplifter in the same delivery on request. The combinations are technically validated and comply with the applicable safety standards.

Theory is decided on site. A representative scenario from urban glazing shows where the real value of the mini crane and vacuum lifter combination lies.

Starting point

An office building in the city centre is getting a new shop window front made of laminated safety glass on the ground floor. Six elements measuring 3.20 m x 2.10 m, each weighing 800 kg, are to be installed while the neighbouring shops remain open. Delivery is made from the street by a low-loader that may only stop there for 30 minutes. Between the low-loader and the installation position there are 18 metres, a 90-degree bend, a cobblestone area and the building's entrance hall with a sensitive natural stone floor.

Setting up a mobile crane is ruled out: the usable carriageway width is 4.2 m, and a full road closure during opening hours cannot be permitted. An aerial work platform is ruled out because it lacks the load capacity. Manual installation with vacuum lifting beams and personnel is out of the question anyway because of the load and Belgian well-being at work rules.

Solution

Luibl Rental plans the combination of a Maeda MC405C-3 (3,830 kg load capacity, low ground pressure) and an Uplifter UPG1200 glass vacuum lifter (1,200 kg, dual-circuit system, radio remote control). Both machines are delivered on the Luibl fleet's own low-loader, with shared logistics and a single handover appointment.

Step 1 - Delivery and positioning: The MC405C-3 drives off the low-loader and crosses the entrance foyer with its boom folded (ground pressure 0.52 kg/cm2 - no pressure marks in the natural stone). It is set up inside the building next to the installation point.

Step 2 - Picking up the glass element: The UPG1200 is attached to the crane's load hook. The radio remote control allows independent control of lifting, slewing and tilting of the lifter. The first 800 kg element is taken from the low-loader, and the MC405C-3 uses the Pick & Carry function: with the load suspended, the crane travels at reduced speed to the installation position.

Step 3 - Positioning: At the installation position, the UPG1200 hydraulically tilts the glass element from the horizontal transport position into the vertical installation position. The electric tilting unit does this in one controlled movement. Using the crane's proportional control, the element is placed on the locating bolts of the steel frame - tolerance +/-2 mm.

Step 4 - Repetition: The five remaining elements follow the same procedure. Total installation time for six elements: 4.5 hours, including two breaks for battery maintenance on the UPG1200.

Result

What would have cost several days of permits and a complete business shutdown for the shops with a mobile crane and a road closure took half a working day with the Maeda-Uplifter combination. The low-loader stop at the site fence stayed within the 30-minute limit. No floor damage, no noise nuisance for residents - the Maeda MC405C-3 runs on diesel but can be supplemented by the electric battery-powered units when the indoor phase has to run without exhaust fumes.

Glass installation falls under the Code on Well-being at Work, Book IV (work equipment) and requires a prior risk assessment. Three components must be documented before work begins.

Personal protective equipment (PPE)

The following applies to everyone involved in the lift:

• Cut-resistant gloves of class F (highest level of cut protection, EN 388)

• Safety shoes S3 with puncture-resistant sole and toe cap

• Safety helmet EN 397

• Safety glasses when working under the load or grinding/drilling at the glass edge

• Full-body harness and lanyard for work at height under the Code on Well-being at Work

For outdoor installation in areas with a fall risk, a separate rescue plan with a defined recovery scenario is also needed.

Acceptance records before lifting begins

Before the first load is picked up, the following points are checked in writing and countersigned by the responsible operator:

• Current periodic inspection of the crane by an external technical inspection body (EDTC/SECT), with a valid inspection certificate

• Current inspection of the vacuum lifter in line with applicable Belgian safety rules and NBN EN standards, with a documented function test of both vacuum circuits

• Load chart of the crane for the planned lifting configuration (radius, lift height, boom angle)

• Written load weight confirmation from the glass manufacturer

• Ground assessment: bearing capacity of the ground in kg/cm2, compared with the machine's ground pressure at full load

• Weather record: wind speed (critical value for glass installation typically 6 m/s near ground level, varying with the wind area of the pane), precipitation, visibility

• Operator qualification: the required operator qualification for the crane and instruction for the vacuum lifter

Luibl Rental delivers every mini crane with a current inspection report and a short safety briefing at the handover location. Responsibility for the site-specific risk assessment remains with the contractor - Luibl supports with templates and advice.

Operator qualification: what is required

Operating a mini crane requires the required operator qualification in line with applicable Belgian safety rules, supplemented by the specific instruction for the model concerned. Anyone working with a vacuum lifter also needs instruction in the vacuum system.

Luibl Rental provides the operator briefing on handover. A regular refresher of the instruction by the employer is recommended.

Maeda mini cranes are not standard machines - their dead weight of between 1.9 tonnes (MC104C) and 9.5 tonnes (MC815C) and their special dimensions call for tailored transport solutions. Luibl Rental operates its own low-loader fleet, which delivers machines and vacuum technology by low-loader to your site in a single delivery, throughout Belgium.

The delivery areas cover Belgium, Germany, Austria, Switzerland, Poland, the Czech Republic, Italy, Hungary and other European markets. Luibl also responds flexibly to urgent requests. For large projects and long-term rentals, terms including integrated periodic inspection and maintenance are available - no extra effort for the renter, no downtime due to expired inspection dates.

On-site service is available during the rental period. In the event of technical problems or operating questions, a technician can come to the site at short notice.

For vacuum technology, the parallel logistics of sister brand Uplifter apply: glass vacuum lifters are delivered directly with the mini crane, and technical advice on lifter selection and safety equipment is provided by the Uplifter team in close coordination with Luibl Rental.

An honest assessment is part of any advice. The combination of mini crane and vacuum lifter is the right solution when at least three of the following conditions apply:

• Glass elements over 200 kg need to be installed

• The work location is inaccessible to mobile cranes (interiors, courtyards, listed buildings, narrow access routes)

• The ground is pressure-sensitive (natural stone, parquet, freshly laid floors, underground car park decks)

• The installation must be low-noise or produce fewer exhaust emissions than Stage III engines (hospital, residential area during night work, sensitive customer areas)

• A 360-degree pick-and-carry movement is needed, in which the load travels from the delivery point to the installation position without intermediate re-handling

The combination is not the right solution if the glass element weighs less than 80 kg and can be safely installed by two people with a hand-held vacuum lifter, if a mobile crane can be set up without difficulty (open-air industrial construction, open large sites) or if the lift height is well above 25 m - classic cranes or roto telehandlers are then the more economical choice. For lift heights between 15 and 30 metres, Luibl's roto telehandlers are often worth considering as an alternative.

The requirements for glass installation are harmonised internationally. EN 13000 sets the safety requirements for mobile cranes, EN 1492-1 covers sling inspection and EN 13155 covers non-fixed load lifting attachments - glass vacuum lifters fall directly under this standard. Anyone working in Belgium or elsewhere in Europe has to comply with these standards anyway - in Belgium they apply as NBN EN standards, supplemented by the Belgian well-being at work legislation (Act of 4 August 1996 and the Code on Well-being at Work).

On site, the trend towards electric drives with no local emissions continues to gain momentum. Luibl Rental keeps pace with the electric version of the MC104C, the battery-powered MK3053CB and, in future, further hybrid models. For inner-city sites with municipal noise regulations and for emission-sensitive areas such as food production or hospitals, these machines are the only legally sound solution.

Glazing is precision work under physical constraints that rarely leave any leeway. Choosing the right lifting equipment is not a question of the daily rental price, but of project safety, compliance with the Act of 4 August 1996 on well-being at work and the Code on Well-being at Work, Book IV (work equipment), and ultimately of cost efficiency across the entire construction phase.

With its Maeda mini crane fleet and the vacuum technology available through sister company Uplifter, Luibl Rental offers a coordinated complete system that is hard to match in the rental sector in Central and Western Europe. Delivery throughout Belgium, own low-loaders and integrated periodic inspection for long-term rentals are not marketing terms but operational reality - and exactly what makes the difference between project success and an insurance claim with an 800 kg glass element on the fifth floor.

Enquiries and advice: contact the Luibl team via the contact form. For vacuum technology and glass lifters, your enquiry is passed directly to the Uplifter specialists - one contact, one quote, one delivery process.

What load capacity do I need for a standard glass facade pane?

A three-layer laminated safety glass pane measuring 3.0 m x 1.5 m weighs approx. 280 to 360 kg, depending on glass thickness and the aluminium frame. With a safety factor of 1.5, the lifter should handle at least 540 kg and the crane at least 600 kg at the required radius. The specific sizing is carried out using the load chart ahead of the rental request.

How much does it cost to rent a Maeda mini crane per day?

The daily rate for a Maeda MC104C starts in the range of compact models and rises considerably up to the heavy-duty class of the MC815C. Specific daily prices depend on rental duration, delivery area and additional services such as a vacuum lifter. Luibl Rental prepares project-specific quotes without flat rates - which is standard for special equipment.

Do I need separate instruction for the mini crane and the vacuum lifter?

Yes. The crane instruction covers crane operation; separate instruction is needed for the vacuum lifter. Luibl Rental provides both instructions on handover, often combined in one session.

Can I rent the mini crane and vacuum lifter separately?

Technically, yes. In practice, the combined rental is the more economical solution in almost all cases, because the logistics (low-loader, handover appointment, collection) are bundled. For pure load hook applications without glass or panels, renting a lifter is of course unnecessary.

How quickly can Luibl deliver?

For standard requests throughout Belgium, usually at short notice. For special urban jobs with an unusual configuration, a longer preparation time may be needed - an early request helps.