Home > PB35A-4R-E Column-Climbing Concrete Placing Boom — 35.6 m

PB35A-4R-E Column-Climbing Concrete Placing Boom — 35.6 m

The PB35A-4R-E is a column-climbing concrete placing boom designed for high-rise construction and large floor plates. It features a 35.6 m placement radius via a 4-section R-fold articulating boom with a 210° folding end section, maintaining a continuous 360° slewing capability. Integrated with a stationary or line concrete pump via a vertical riser pipeline, the unit distributes concrete across floor decks, core walls, and columns. The system operates on a 380V/50Hz electrical supply utilizing a 22 kW motor, driving a 30 MPa hydraulic system. It utilizes a fully hydraulic internal climbing mechanism to ascend the building structure synchronously with construction progress.

Mounted on a floor frame or within an elevator shaft, the boom operates within an ambient temperature range of -20 °C to 55 °C and features a free-standing height of 21.6 m. The unit is manufactured and tested at the TRUEMAX facility in Haining, holding ISO 9001:2015 and CE certification.

1. Extended 35.6 m reach — Provides a wide placement radius to minimize repositioning on expansive floor plates.

2. 210° end-section fold — The fourth arm articulates up to 210°, enabling the delivery hose to navigate dense rebar and structural obstructions near the core.

3. Reinforced hydraulics — A 22 kW motor and 30 MPa system pressure power the boom articulation and maintain stable movements under load.

4. Four-section R-fold boom — Offers flexible articulation and folds compactly for climbing sequences and transport.

5. Self-climbing mechanism — Ascends internally via floor or shaft frames using hydraulic cylinders, operating independently of external crane lifts between levels.

6. Gear slewing with cushion valve — Enables 360° continuous rotation with integrated cushioning for controlled acceleration and deceleration.

7. Integrated component mounting — Consolidates the hydraulic pump station and electrical control cabinet on the lower support structure.

8. Control configurations — Supported by electric-proportional remote, radio, or cable controls utilizing Omron and Schneider components.

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Technial Parameters

Item	Unit	PB35A-4R-E
Performance
Max. Radius of Placing Boom	m	35.6
Free-Standing Height (to boom root joint)	m	21.6
Slewing Range	/	360°
Mode of Slewing	/	Gear Slewing
Circumstance Temperature	℃	-20 ~ 55
Power Supply (customisable)	/	380V / 50Hz
Boom (4-Section R-Fold)
1st Section — Length	m	9.735
1st Section — Articulation	°	0 ~ 88
2nd Section — Length	m	8.22
2nd Section — Articulation	°	0 ~ 180
3rd Section — Length	m	8.355
3rd Section — Articulation	°	0 ~ 180
4th Section — Length	m	8.39
4th Section — Articulation	°	0 ~ 210
Delivery Line
Delivery Pipeline Diameter	mm	Φ125 × 4.5
Delivery Hose Diameter	in × mm	5" × 3000
Power & Hydraulics
Motor Power	kW	22
Hydraulic Pressure	MPa	30
Hydraulic Oil (5℃–55℃)	/	HM46 anti-wear
Hydraulic Oil (-20℃–5℃)	/	HM32 anti-wear
Installation & Weight
Application Scenario	/	Floor / Shaft Climbing
Balance Arm	/	None
Total Weight	kg	17824
Max. Lifting Unit	kg	5200

Dimensions & Working Range

The working-range diagram maps the operational envelope of the PB35A-4R-E, detailing the 35.6 m horizontal radius across a 360° sweep and the additional reach provided by the 210° end-section fold. The free-standing height of 21.6 m indicates the maximum vertical elevation above the support without external bracing. This data should be cross-referenced with structural layouts and climbing-frame specifications to plan core integration.

Applications

The PB35A-4R-E is engineered for high-rise structures featuring expansive floor plates, providing a 35.6 m placement radius to minimize repositioning cycles.

Large-floor-plate towers

Facilitates floor-by-floor concrete placement for large-scale high-rise towers, utilizing a 35.6 m radius to distribute material across expansive decks.

Core walls and elevator shafts

Utilizes shaft frame mounting for internal climbing within elevator shafts or large core walls.

High-volume structural floors

Supports high-volume structural pours through the integration of a 22 kW / 30 MPa hydraulic system and a 4-section boom.

Major bridge pylons

Applies to the construction of major bridge pylons and tall piers by climbing the structural elements directly.

FAQs

Why choose the PB35A-4R-E over smaller column-climbing booms?

The PB35A-4R-E provides a 35.6 m placement radius, the largest in the column-climbing series, minimizing the need for multiple boom setups on large floor plates compared to the 27.7 m PB28A-3R-II or 32.6 m PB33D-4R. The trade-offs include a heavier maximum lifting unit (5,200 kg) and a larger erection crane requirement.

What is the free-standing height?

The free-standing height is 21.6 m, indicating the maximum vertical elevation the boom can stand above its support without external bracing. The structure requires anchoring at closer intervals compared to smaller, lighter models.

What operating temperature is it rated for?

The system is rated for ambient temperatures of -20 °C to 55 °C, utilizing HM46 anti-wear hydraulic oil for 5–55 °C and HM32 for -20–5 °C operations.

How large a floor can it cover from one position?

With a 35.6 m radius and continuous 360° rotation, the boom covers a circular area approximately 71.2 m in diameter from a single setup.

Is it a pump, and how does it climb?

It is a placing boom, functioning strictly as a distribution terminal. It requires a separate concrete pump to deliver material via a riser pipeline. It ascends internally using hydraulic cylinders on floor or shaft frames.

Electric or diesel, and what crane is required?

The unit is electrically driven, operating on a 380V/50Hz supply with a 22 kW motor. It has no onboard diesel engine. The maximum single lifting unit weighs 5,200 kg, determining the minimum required site crane capacity.

What is supplied, and how is it shipped?

The standard configuration includes the placing boom, lower support, hydraulic pump station, control cabinet, and remote controls. Climbing columns, frames, and pipelines are specified per project requirements.

Column-climbing placing boom series

The PB35A-4R-E represents the maximum reach model in the column-climbing placing boom series, which includes the 27.7 m PB28A-3R-II, the 31.7 m PB32A-3R-II, the 32.4 m PB33A-4R-II, and the 32.6 m PB33D-4R. The comprehensive B8 series provides six mounting configurations: column-climbing, formwork-climbing, mobile spider, wheeled mobile, lattice tower, and mobile boat booms. The column-climbing configuration is deployed for internal vertical progression within high-rise structural cores.

System integration with concrete pumps

The placing boom operates as the terminal distribution equipment in high-rise applications. Concrete is transported to the site and pumped vertically via a stationary or truck-mounted line pump through a fixed riser pipeline. The PB35A-4R-E interfaces with the riser to distribute concrete across floor decks, shear walls, and columns, completing the vertical and horizontal delivery sequence.

Matching reach to floor plate geometry

The selection of placing boom radius depends on optimizing the coverage area from a minimal number of climbing positions. A boom that reaches the perimeter of the slab from the central core requires only a single installation per floor. The 35.6 m radius of the PB35A-4R-E is specified for expansive floor plates to eliminate the additional relocation cycles required by shorter models, thereby increasing operational efficiency on large-scale developments.