IMER – Gerris 800 Lithium | Powered Crawler Concrete Placement Boom – 1128787 is a fully electric, self‑propelled tracked placing boom designed to place pumped concrete quickly, cleanly, and quietly in hard‑to‑reach areas. Powered by a 48V AC motor and a high‑capacity lithium battery pack, it delivers the same 26 ft reach and 37 ft max height as the gas version while eliminating exhaust fumes and drastically reducing noise.

Overview: IMER Gerris 800 Lithium Concrete Placing Boom – 1128787

The IMER Gerris 800 Lithium is a crawler concrete placing boom that travels on rubber tracks and distributes pumped concrete within a working envelope of about 26 ft horizontal outreach and 37 ft vertical height. It is radio‑controlled and features auto‑leveling outriggers, so the operator can maneuver and set up the machine from a safe distance, then place concrete precisely with 355° turret rotation.

Unlike the gas/Bi‑Energy model, the Gerris 800 Lithium is driven by an AC electric motor powered by a 120 Ah lithium battery, providing silent, emission‑free operation ideal for enclosed structures, parking decks, industrial plants, and urban jobsites with strict environmental requirements. Model 1128787 is the North American lithium‑powered variant marketed as “Gerris 800 Lithium | Powered Crawler Concrete Placement Boom.”

Key Specifications: Gerris 800 Lithium – 1128787

Based on IMER USA and IMER Group data for the lithium version:

• Model: Gerris 800 Lithium crawler concrete placing boom

• Model number (Lithium): 1128787 (global ref. 1128786)

• Power system:

  • Electric motor: 48V AC, about 5.4 HP (4 kW)

  • Battery: 48V, approx. 120 Ah lithium battery pack

• Max height served: 37 ft (11.20 m)

• Max horizontal outreach: 26 ft / 7.80–8.0 m

• Max depth of casting (including rubber end hose): about 16.5 ft / 5 m

• Max concrete grain size: 1 in (25 mm)

• Turret rotation: 355° range of action

• Overall stabilized footprint (outriggers deployed): approx. 3.1 m × 3.26 m (9' 7" × 10' 1")

• Transport dimensions (tracks retracted):

  • Width: 800 mm (2' 7")

  • Length: approx. 4,930 mm (16' 2")

  • Height: about 6' 6"

• Max travel speed: up to 1.6 mph (approx. 2.5 km/h)

• Gradeability: 25% slope

• Weight: approx. 2,550 kg (about 5,622 lb) for lithium version (vs. 2,500 kg petrol)

• Piping: DN 100 (4") steel boom piping with 3 m DN 100 rubber terminal hose

These specs confirm that the IMER – Gerris 800 Lithium | Powered Crawler Concrete Placement Boom – 1128787 retains full boom performance while switching to clean electric drive.

Lithium Electric Drive and Zero-Emission Operation

The defining feature of the Gerris 800 Lithium is its fully electric drive system.

• 48V AC electric motor powered by a 120 Ah lithium battery pack provides the hydraulic power to drive the tracks, outriggers, and boom.

• Battery model is designed to “work silently, cleanly and quickly in any environment,” with no exhaust gases and significantly lower noise compared to petrol engines.

• The lithium system is sized for a full work shift depending on duty cycle and travel vs. boom usage; the battery is rechargeable via external charger connection.

For contractors pouring concrete inside buildings, tunnels, parking garages, and enclosed industrial facilities, this silent, zero‑emission operation is a major advantage over gas‑powered booms or crane‑hung systems.

Self-Propelled Crawler Chassis and Mobility

Like the gas version, the Gerris 800 Lithium uses a robust crawler chassis with hydraulically adjustable tracks.

Mobility highlights:

• Rubber tracks, hydraulically expandable from about 787 mm to 1050 mm, allow narrow transport and wider stance for stability in work mode.

• Two travel speeds: “Slow” for precise maneuvering and “Fast” for longer movements without obstacles.

• 25% gradeability so the unit can climb ramps and handle uneven construction terrain.

The small 800 mm (2' 7") transport width and 4.93 m (16' 2") length mean the Gerris 800 Lithium can be maneuvered through confined access points that are impossible for truck‑mounted booms.

Boom Geometry, Work Envelope, and Opening Space

The Gerris 800 Lithium uses the same 3‑section distribution boom as the petrol model, optimized for tight spaces.

Key boom features:

• Max height served: 11.20 m (37 ft) for elevated slabs, walls, and columns.

• Max outreach: approx. 8 m (26 ft) horizontally across floors, foundations, and pavements.

• Max depth reachable: 5 m (~16.5 ft) below the machine position, including the 3 m rubber terminal hose, enabling basement and pit pours.

• Range of action: 355° turret rotation gives nearly full circular coverage from one setup.

• Boom opening space: requires only about 2.80 m (~9' 2") to open the sections, allowing operation in areas with not particularly high floors and low overhead obstructions.

This geometry lets crews place concrete on slabs, inside walls, around columns, and into complex formwork with minimal repositioning.

Radio Control, Auto-Leveling Outriggers, and Safety

The IMER – Gerris 800 Lithium | Powered Crawler Concrete Placement Boom – 1128787 is fully radio‑controlled and includes several embedded safety systems.

Standard equipment includes:

• Wireless radio‑control with backlit display, allowing operators to control travel, outriggers, and boom motions from a safe vantage point.

• Two rechargeable lithium batteries for the radio handset plus an integrated charger on the machine.

• Electronic hour counter and self‑diagnosis with anomaly reporting displayed on the remote.

• Acoustic signaling of movement and abnormal conditions to alert nearby workers.

• Automatic outriggers leveling with an electronic inclinometer, which levels the machine at the touch of a control.

• Outrigger pads (Ø 200 mm) for stable support on slabs and subgrades.

• Automatic block valve on all hydraulic actuators to lock positions in case of hydraulic failure.

If the chassis exceeds a safe tilt angle during travel, the machine automatically stops and reports the tilt anomaly on the remote control. This helps prevent accidents on sloped or uneven ground.

Pump Compatibility and Concrete Capability

The Gerris 800 Lithium is a placing boom only; it must be supplied by an external concrete pump.

• Piping: The boom is equipped with DN 100 (4") steel pipes and a removable header pipe, plus a 3 m DN 100 rubber terminal hose.

• Pump interface: Designed to pair directly with any concrete pump using 4" HD couplings.

• Maximum concrete grain size: 25 mm (1"), suitable for standard structural concretes and many high‑flow pump mixes.

IMER recommends combining the Gerris 800 with their Booster series pumps (Booster 20 / formerly Booster 15) or other compatible line pumps for a complete pumping and placing system.

Standard Equipment on the Gerris 800 Lithium

Drawing from IMER Group documentation and the shared feature set:

The Gerris 800 Lithium typically includes:

• 48V AC electric motor powered by 120 Ah lithium battery.

• Emergency manual hydraulic pump for backup operations.

• Wireless radio control (with backlit display) and two rechargeable lithium hand‑set batteries.

• Integrated lithium battery charger on board.

• 12V maintenance battery charger for control electronics.

• Machine‑mounted control panel for local operation.

• Electronic hour meter, self‑diagnostic system, and anomaly reporting.

• Acoustic signaling of motion and alerts.

• Double‑speed traction motors.

• Rubber tracks with hydraulic width adjustment (787–1050 mm).

• Automatic outrigger leveling with inclinometer, Ø 200 mm outrigger pads.

• DN 100 piping along the boom, removable header pipe, and 3 m 4" rubber end hose.

This standard package makes the Gerris 800 Lithium an immediately usable placing solution once paired with a pump and hoses.

Typical Applications for the Gerris 800 Lithium

The IMER Gerris 800 Lithium is ideal wherever precise concrete placement is needed in spaces that are difficult or impossible to access with truck‑mounted booms or tower cranes.

Common applications include:

• Laying concrete on foundation slabs and floor decks.

• Pouring concrete pavements and industrial floors.

• Filling formwork for masonry walls and reinforced concrete walls.

• Constructing swimming pools and tanks.

• Filling disposable or reusable column formwork.

• Casting thermal insulation walls using EPS, expanded clay, or fiber‑based insulating systems with integral reinforcement.

• Filling precast reinforced concrete walls and load‑bearing reinforced walls.

• Casting containment and foundation piles.

Because it runs silently and without exhaust, the Gerris 800 Lithium excels on interior pours (parking garages, warehouses, plants) and tight urban sites where emissions and noise are tightly regulated.

Why Choose IMER – Gerris 800 Lithium | Powered Crawler Concrete Placement Boom – 1128787?

The IMER – Gerris 800 Lithium | Powered Crawler Concrete Placement Boom – 1128787 offers a unique combination of compact size, full placing‑boom reach, and clean lithium electric power. With a 2' 7" transport width, 26 ft outreach, 37 ft height, 355° rotation, and 1 in aggregate capability, it can place pumped concrete almost anywhere within its envelope while operating silently and emission‑free.

Its self‑propelled crawler chassis, auto‑leveling outriggers, radio control with diagnostics, and compatibility with any 4" concrete pump make it a flexible tool for contractors who need precise, efficient concrete placement in confined or sensitive environments. For forward‑looking concrete contractors, precast producers, and infrastructure builders focused on productivity, safety, and environmental performance, the Gerris 800 Lithium stands out as a powerful, modern solution for crawler concrete placing.