Delivering 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 production halls today rarely weigh less than 500 kilograms. Triple glazing in an aluminium frame for an office building of standard size quickly reaches 380 to 600 kg per element, and special panes for lobbies and showrooms regularly exceed 800 kg. Anyone who has to bring such loads to the fifth floor through a stairwell or across a courtyard to the installation position will find a mobile crane lacks set-up space, an aerial work platform lacks load capacity, and manual handling runs up against occupational safety rules.

The answer lies in combining a mini crane and a vacuum lifter - two machines that each have their own speciality and together become the only economical solution as soon as the site is tight, the ground sensitive and the load demanding. Luibl Rental offers a coordinated rental package 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 the sister brand Uplifter within the Luibl Group - glass vacuum lifters with single- and dual-circuit systems up to 1,200 kg load capacity that can be hung seamlessly on the hook of any Maeda crane.

This pillar page provides an in-depth view: which technological synergy between crane and vacuum lifter determines project success? Which load capacity reserves can actually be used at which outreach? And what does practice look like with an 800 kg facade element in a city-centre location?

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

Proportional control as a prerequisite for millimetre precision

The first key is the crane's proportional control. On a Maeda MK3053CB, for example, all radio remote control joysticks can be regulated steplessly between standstill and maximum speed. In glazing, this is not a comfort feature but a basic requirement. A 600 kg laminated safety glass pane hanging from a vacuum lifter on the crane tip swings with every jerky movement of the hoist winch - with an inertia that releases several hundred joules of kinetic energy over 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 guide 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 operators master precisely after a short familiarisation.

Vacuum safety circuit: single-circuit versus dual-circuit system

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

However, as soon as loads are lifted over people, traffic routes or above a lift height of more than 2 metres, a dual-circuit system is required in line with applicable Slovak safety rules and STN EN standards. Here, two completely separate vacuum circuits work with their own pumps, tanks and pressure gauges - if one circuit fails, the second continues to hold the load safely. The Uplifter models of the UPG series from the UPG600 upwards, as well as the Glassworker GW1125, have this redundancy as standard, with battery power independent of the mains. 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 are set up on outriggers and lift from a stationary position. A Maeda MC405C-3, on the other hand, can transport a load while travelling if it lies within the free load chart - with the boom retracted and the machine in travel mode. Glass elements can thus be brought from the delivery point at the site fence directly to the installation position without having to be stored or moved in between.

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 even pass over 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 technology.

Load moment limiter: the invisible protective layer

Every Maeda mini crane in the Luibl rental fleet has an electronic load moment limiter, which compares the product of load and outreach with the permissible load moment of the respective boom position in real time. If the value is exceeded, the system automatically stops the critical movement - typically further extension or lowering of the boom. On models with a knuckle boom such as the MK1033CW1 or MK3053CB, the limiter also monitors the knuckle angle, because the load moment curve behaves non-linearly at the knuckle transition points, where the greatest risks of overload arise.

The load moment limiter is not a comfort feature but mandatory equipment under STN EN 13000 and a prerequisite for the inspections and tests of technical equipment. At Luibl Rental, no mini crane leaves the depot without the limiter having been verified with calibrated test weights as part of the regular inspections and tests of technical equipment (Decree No. 508/2009 Coll.).

Selecting the right mini crane for a glazing project is not a matter of gut feeling but a calculation based on three variables: maximum load in kg, required outreach in m and lift height in m. In addition, transport width, ground pressure and drive type become 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 outreach

• 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 interiors, 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 work over obstacles

• Transport width: 750 mm

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

Maeda MK3053CB - battery-powered professional with knuckle boom

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

• 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 control

• 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 ground

Maeda MC815C - heavy-duty class

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

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

• Maximum working range: 18.8 m at 340 kg load

• Dead weight: 9,460 kg

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

The knuckle transition problem: 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 load curves over lift height and outreach, in reality there are transition zones in which the permissible load changes abruptly - wherever the knuckle boom changes its geometry (folded versus unfolded) or 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 outreach, but only 650 kg at 5.5 m outreach with the same boom angle, and when switching to knuckle boom use, the permissible load drops to 580 kg at an identical geometric position. The load moment limiter protects against overload, but an experienced operator plans the lifting sequence so that these transition points are not passed in the critical load range - this prevents unwanted cut-offs in the middle of a movement.

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

Vacuum lifters from sister brand Uplifter - load capacity classes

The vacuum technology within the Luibl Group comes from Uplifter, the German specialist in vacuum lifting technology, which has worked 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 glazing indoors, 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, exterior installation

Uplifter UPG1200 vacuum glass lifter

• Load capacity: up to 1,200 kg

• Dual-circuit system with up to 12 suction pads

• Suction pads can be positioned flexibly using 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° rotation, hydraulic 90° tilting

• Two independent vacuum circuits with dual safety per circuit

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

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

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

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

Initial situation

An office building in the city centre is getting a new shop 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 retailers remain open for business. Delivery comes from the street on a low-loader that may only stand within a 30-minute stopping permit. Between the low-loader and the installation position there are 18 metres, a 90-degree bend, a cobblestone section and the building entrance with a delicate natural stone floor.

Setting up a mobile crane is not an option: the usable carriageway width is 4.2 m, and a full road closure during business hours cannot be approved. An aerial work platform is ruled out because it lacks the load capacity. Manual installation with vacuum lifting beams and staff is out of the question anyway because of the load and the requirements of occupational safety rules (Act No. 124/2006 Coll.).

Solution

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

Step 1 - delivery and positioning: The MC405C-3 drives off the low-loader and, with its boom folded, crosses the entrance foyer (ground pressure 0.52 kg/cm² - no impression 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 hook. The radio remote control allows independent control of hoisting, slewing and suction tilt. The first 800 kg element is lifted from the low-loader, and the MC405C-3 uses its 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 set onto the locating pins of the steel frame - tolerance +/-2 mm.

Step 4 - repetition: The other five elements follow the same sequence. Total installation time for six elements: 4.5 hours, including two breaks for battery care of the UPG1200.

Result

What would have cost several days of permits and a complete shutdown of the shops with a mobile crane and 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 window. No floor damage, no noise nuisance for residents - the Maeda MC405C-3 runs on diesel but can be supplemented by electric operation of the battery-powered machines if the indoor phase has to run without exhaust fumes.

Under occupational safety rules (Act No. 124/2006 Coll.) and Government Regulation No. 392/2006 Coll. (work equipment), glass installation is an activity that requires a risk assessment. Three components must be documented before work begins.

Personal protective equipment (PPE)

The following applies to everyone involved in the lifting operation:

• Cut-resistant gloves class F (highest protection level against cuts, EN 388)

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

• Safety helmet EN 397

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

• Full-body harness and restraint lanyard for work in areas with a risk of falling - work at height under Government Regulation No. 147/2013 Coll.

For exterior installation in areas with a risk of falling, a separate rescue plan with a defined recovery scenario is also required.

Acceptance records before lifting starts

Before the first lift, the following points are checked in writing and countersigned by the responsible operator:

• Valid inspections and tests of the crane (Decree No. 508/2009 Coll.) with proof that they have been carried out

• Valid check of the vacuum lifter in line with applicable Slovak safety rules, 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 confirmation of the load weight 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: required crane operator competence and briefing on the vacuum lifter

Luibl Rental supplies every mini crane with a current inspection record and an operator briefing on handover. Responsibility for the site-specific risk assessment remains with the contractor - Luibl supports you with templates and advice.

Operator qualification: what is required

In Slovakia, operating a mini crane requires the required operator competence in line with applicable Slovak safety rules, supplemented by a briefing on the specific machine model. Anyone working with a vacuum lifter also needs a briefing on the suction system.

Luibl Rental provides an operator briefing on handover. We recommend repeating the safety instruction regularly within your company.

Maeda mini cranes are not standard machines - their dead weight of 1.9 tonnes (MC104C) to 9.5 tonnes (MC815C) and their special dimensions require tailored transport solutions. Luibl Rental operates its own low-loader fleet, which delivers machines and vacuum equipment in a single delivery directly to your site anywhere in Slovakia.

Delivery areas include Slovakia, Germany, Austria, Switzerland, Poland, Czechia, Italy, Hungary and other European markets. Thanks to delivery throughout Slovakia, Luibl responds flexibly even to short-notice requests. For large projects and long-term rentals, terms including inspections and regular maintenance are available - no extra effort for the hirer, no downtime due to expired inspection intervals.

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

For vacuum equipment, the parallel logistics of our sister brand Uplifter apply: vacuum glass 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.

Sound advice includes an honest assessment. The combination of a mini crane and a vacuum lifter is the right solution if at least three of the following conditions apply:

• Glass elements weighing over 200 kg are to be installed

• The site is inaccessible for mobile cranes (interiors, courtyards, listed buildings, narrow access routes)

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

• Installation must be quiet or with reduced exhaust emissions compared with Stage III engines (hospital, residential area at night, sensitive customer areas)

• A 360° pick-and-carry movement is required in which the load travels from the delivery point to the installation position without intermediate repositioning

The combination is not the right solution if the glass element weighs less than 80 kg and can be installed safely by two people with hand-held suction lifters, 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 - in that case conventional cranes or roto telehandlers are 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 testing, and EN 13155 the requirements for non-fixed load-lifting attachments - vacuum glass lifters fall directly under this standard. Anyone working in Slovakia or other EU countries must comply with these standards anyway - in Slovakia they apply as STN EN standards together with occupational safety rules.

On construction sites, the trend towards electric drives without 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 city-centre sites with municipal noise restrictions and for emission-sensitive areas such as food production or hospitals, these machines are the only legally secure solution.

Glazing is precision work under physical conditions that rarely leave room for manoeuvre. Choosing the right lifting equipment is not a question of the daily rental price but of project safety, compliance with occupational safety rules and Government Regulation No. 392/2006 Coll., and ultimately economic efficiency across the entire construction phase.

With its Maeda mini crane fleet and the vacuum equipment available through its sister company Uplifter, Luibl Rental offers a coordinated complete system that is unmatched in Central Europe. Delivery throughout Slovakia, dedicated low-loaders, inspections included with long-term rentals and an operator briefing on handover 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 equipment and glass lifters, your enquiry is forwarded 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 triple-layer laminated safety glass pane measuring 3.0 m x 1.5 m weighs approx. 280 to 360 kg, depending on glass thickness and 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 design is based on the load chart before the rental request.

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

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

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

Yes. Operating the crane requires the required operator competence in line with applicable Slovak safety rules. A separate briefing is required for the vacuum lifter. Luibl Rental provides an operator briefing on handover for both machines.

Can I rent the mini crane and the vacuum lifter separately?

Technically yes. In practice, renting them together is the more economical solution in almost all cases because the logistics (low-loader, handover appointment, return) are bundled. For pure hook applications without glass or panels, you can of course do without the vacuum lifter.

How quickly can Luibl deliver?

For standard requests from anywhere in Slovakia, usually at short notice. For special urban jobs with an unusual configuration, longer preparation may be needed - an early request helps.