Glass construction projects made efficient: mini cranes and vacuum lifters from Luibl Rental

Glass facades, steel-glass structures and laminated panes for atriums, office towers and factory halls rarely weigh less than 500 kg today. Triple glazing in an aluminium frame for a standard-sized office building easily 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 via a stairwell or across an inner courtyard to the installation position 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 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 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 a load capacity of more than 8 tonnes. The matching vacuum technology is provided by the sister brand Uplifter within the Luibl Group - glass vacuum lifters with 1-circuit and 2-circuit systems and a load capacity of up to 1,200 kg that can be attached seamlessly to the load hook of any Maeda crane.

This pillar page provides an in-depth overview: which technological synergy between crane and vacuum lifter determines the success of the project? 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?

A mini crane on its own lifts - a glass vacuum lifter on its own holds. Only the combination of both systems allows what counts in glazing work: low-contact, precisely guided positioning of large glass elements in confined conditions. Three technological features 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 radio remote control joysticks can be regulated steplessly between standstill and maximum speed. In glazing work this is not a convenience 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 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 guide lifting, lowering, slewing and boom movement in the finest speed increments. Maeda calls this 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: 1-circuit versus 2-circuit system

On the vacuum lifter side, the number of independent vacuum circuits determines the permissible range of use. A 1-circuit system generates the vacuum via 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 lifting takes place over people, traffic routes or to a lift height of more than 2 metres, a 2-circuit system is appropriate in line with applicable Czech safety rules and CSN 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 UPG series models from UPG600 upwards and 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 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. This allows glass elements to be brought from the unloading point at the site fence directly to the installation position without having to store or reposition them in between.

Combined with the low ground pressure of the rubber tracks - 0.52 kg/cm2 on the MC405C-3 - this creates a system that can pass over freshly laid parquet, marble or natural stone floors in foyers and showrooms without leaving 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 is equipped with an electronic load moment limiter (LML) that compares, in real time, the product of load and outreach with the permissible load moment of the respective boom position. If the value is exceeded, the system automatically stops the critical movement - typically further extension or lowering of the boom. On models with an articulated boom such as the MK1033CW1 or MK3053CB, the LML also monitors the articulation angle, because the load moment curve behaves non-linearly at the articulation edges, where the greatest risks of overload arise.

The LML is not a convenience feature but mandatory equipment under CSN EN 13000 and a prerequisite for the periodic inspection under Government Regulation No. 378/2001 Coll. At Luibl Rental, no mini crane leaves the depot without the LML having been verified with calibrated test weights as part of the periodic inspection of designated lifting equipment.

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 are added 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 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 old 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 - articulated boom specialist with slim body

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

• Fully automatic articulated boom for working over obstacles

• Transport width: 750 mm

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

Maeda MK3053CB - battery-powered professional with articulated 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-heavy facade installation, emission-sensitive areas, inner 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 with a 340 kg load

• Dead weight: 9,460 kg

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

The articulation edge problem: what the load chart does not tell you

A frequently underestimated issue with articulated mini cranes is the so-called articulation edges in the load chart. While the chart suggests continuous load capacity curves over lift height and outreach, in reality there are transition zones in which the permissible load changes abruptly - wherever the articulated boom changes its 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 outreach, but only 650 kg at 5.5 m outreach with the same boom angle, and when switching to articulated boom use the permissible load at an identical geometric position drops to 580 kg. The LML protects against overload, but an experienced operator plans the lifting sequence so that these articulation edges are not passed in the critical load range - this prevents unwanted cut-outs in the middle of a movement.

At Luibl Rental, the handover of every articulated 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 a construction 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, since its acquisition by the Luibl Group, has worked with the Luibl Rental fleet on a project basis. 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

• 1-circuit system

• Application profile: standard glazing indoors, window installation

Uplifter UPG600 / UPG1000

• Load capacity: 600 kg / 1,000 kg

• 2-circuit system with redundant vacuum supply

• Battery power for mains-independent operation

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

Uplifter UPG1200 glass vacuum lifter

• Load capacity: up to 1,200 kg

• 2-circuit system with up to 12 suction pads

• Suction pads can be positioned variably using extensions

• Radio remote control with electric tilting unit

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

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

Uplifter Glassworker GW1125

• Load capacity: max. 2,000 kg

• Motorised rotation through 360 degrees, hydraulic tilting through 90 degrees

• 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

Anyone who rents a Maeda mini crane from Luibl can, on request, receive the matching vacuum system via sister company Uplifter in a single delivery. The combinations are technically validated and comply with applicable safety standards.

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

Initial situation

An office building in a 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 retailers continue trading. Delivery is from the street on a low-loader that may only stand under a 30-minute stopping permit. Between the low-loader and the installation position there are 18 metres, a 90-degree bend, a cobblestone area and the building's entrance area with a sensitive natural stone floor.

Setting up a mobile crane is out of the question: the usable road 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 suction beams and staff is out of the question anyway because of the weight and the requirements of occupational safety rules.

Solution

Luibl Rental deploys 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, 2-circuit system, radio remote control). Both machines are delivered on the Luibl fleet's own low-loader - shared logistics, one handover appointment.

Step 1 - delivery and positioning: The MC405C-3 is driven off the low-loader and passes through the entrance foyer with its boom folded (ground pressure 0.52 kg/cm2 - no 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 vacuum lifter. The first 800 kg element is taken from the low-loader, and the MC405C-3 uses the Pick & Carry function: with the load attached, 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 allows this in one controlled movement. Using the crane's proportional control, the element is set onto the mounting bolts of the steel frame - tolerance +/-2 mm.

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

Result

What would have cost several days of permit procedures and a complete shutdown of 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 operation of battery-powered machines if the indoor phase has to run without exhaust fumes.

Under applicable Czech safety rules and Government Regulation No. 378/2001 Coll., glass installation is an activity for which a risk assessment is prepared. 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 of class F (highest level of protection 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/drilling at the glass edge

• Safety harness and lanyard for work in areas with a risk of falling under Government Regulation No. 362/2005 Coll. (work at height)

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

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 under Government Regulation No. 378/2001 Coll. with a valid inspection sticker (designated lifting equipment)

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

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

• Load weight confirmation from the glass manufacturer in writing

• Assessment of the set-up ground: bearing capacity of the ground in kg/cm2, compared with the ground pressure of the machine at full load

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

• Operator qualification: the required crane operator qualification (designated lifting equipment) and briefing on the vacuum lifter

Luibl Rental supplies 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 under the applicable rules for designated lifting equipment, supplemented by a briefing on the specific model. Anyone working with a vacuum lifter also needs a briefing on the vacuum lifter system in line with applicable Czech safety rules and CSN EN standards.

Luibl Rental provides an operator briefing on handover for both the crane and the vacuum lifter. We recommend refreshing the operator qualification regularly.

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 require adapted transport solutions. Luibl Rental operates its own low-loader fleet, which delivers machines and vacuum technology from Passau in a single delivery to any site in Europe.

Delivery areas include the Czech Republic, Germany, Austria, Switzerland, Poland, Italy, Hungary and other European markets. Machines are delivered by low-loader from Passau throughout the Czech Republic, and we respond flexibly to short-notice enquiries too. For large projects and long-term rentals, terms including periodic inspection under Government Regulation No. 378/2001 Coll. and regular maintenance are available - no additional effort for the renter, no downtime due to expired inspection intervals.

During the rental, on-site service is available. If technical problems or operating questions arise, a technician can come to the site at short notice. On handover we brief your operators on site.

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

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

• Glass elements over 200 kg need to be installed

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

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

• Installation must be low-noise or with lower exhaust emissions than Stage III engines (hospitals, residential areas during night work, sensitive customer areas)

• A 360-degree pick-and-carry movement is required, taking the load from the delivery point to the installation position without intermediate re-handling

This combination is not the right solution if the glass element weighs less than 80 kg and can be installed safely by two people using a hand-held suction 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 - in these cases classic cranes or roto telehandlers are the more economical choice. For lift heights between 15 and 30 metres, Luibl's roto telehandlers are often also worth considering as an alternative.

The requirements for glass installation are harmonised internationally. EN 13000 covers the safety requirements for mobile cranes, EN 1492-1 the testing of textile slings, EN 13155 the requirements for non-fixed load lifting attachments - vacuum lifters fall directly under this standard. Anyone working in the Czech Republic, Austria, Switzerland or even outside the EU has to comply with these standards anyway - in the Czech Republic they are adopted through CSN EN standards and occupational safety rules.

On construction sites, 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 protection requirements and for emission-sensitive areas such as food production or hospitals, these machines are the only legally sound solution.

Glass construction is precision work under physical conditions that rarely leave any margin. Choosing the right lifting equipment is not a question of the daily rental price, but of project safety, compliance with occupational safety rules (Act No. 309/2006 Coll.) and Government Regulation No. 378/2001 Coll., and ultimately of economic efficiency across the entire construction phase.

With its Maeda mini crane fleet and the vacuum technology available through its sister company Uplifter, Luibl Rental offers a coordinated complete system that is unmatched in the Central European rental market. Our own low-loaders, delivery from Passau throughout the Czech Republic, periodic inspection under Government Regulation No. 378/2001 Coll. as part of long-term rental and 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 technology 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 laminated safety glass pane measuring 3.0 m x 1.5 m weighs approximately 280 to 360 kg, depending on glass thickness and aluminium frame. With a safety factor of 1.5, the vacuum 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 enquiry.

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 the rental period, delivery area and additional services such as an operator or vacuum lifter. Luibl Rental prepares project-specific quotes without flat rates - this is standard for special equipment.

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

Yes. Operating both the crane and the vacuum lifter requires the necessary operator qualification in line with applicable Czech safety rules and CSN EN standards - cranes are designated lifting equipment. Luibl Rental does not offer certified training courses in the Czech Republic; however, it provides operator briefing on the mini crane and vacuum lifter on handover.

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

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

How quickly can Luibl deliver?

For standard enquiries from the Czech Republic, usually at short notice. Special urban jobs with an unusual configuration may require longer preparation - an early enquiry helps. We deliver by low-loader from Passau throughout the Czech Republic.