Home > PB32A-3R-II Column-Climbing Concrete Placing Boom — 31.7 m

PB32A-3R-II Column-Climbing Concrete Placing Boom — 31.7 m

The PB32A-3R-II is a column-climbing concrete placing boom featuring a 31.7 m placing radius, designed for high-rise construction with large floor plates. The extended reach is achieved through a 14.5 m first section within the 3-section R-fold boom structure, maintaining a 360° continuous slewing capability. The unit utilizes a fully hydraulic internal climbing mechanism to ascend the building structure synchronously with the construction progress.

Installed on a floor frame or within an elevator shaft, the boom distributes concrete across floor decks, shear walls, and columns when integrated with a stationary or line concrete pump via a vertical riser pipeline. The system operates on a 380V/50Hz electrical supply utilizing an 11 kW motor.

1. Extended 31.7 m reach — The 14.5 m first section provides a wider placement radius, reducing the frequency of repositioning on expansive floor plates.

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

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

4. 3-section R-fold boom — Offers flexible articulation and folds compactly for the climbing sequence.

5. Counterweight-free design — Operates without a balance arm to minimize the slewing envelope within restricted core dimensions.

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

7. Control configurations — Accommodates electric-proportional remote, radio, or cable controls using Omron and Schneider components.

8. Modular column options — Column lengths (4 m, 5 m, 6 m, 10 m) and climbing frames configure to specific structural geometries.

Get a Quick Quote

Technial Parameters

Item	Unit	PB32A-3R-II
Performance
Max. Radius of Placing Boom	m	31.7
Free-Standing Height (to boom root joint)	m	21.3
Slewing Range	/	360°
Mode of Slewing	/	Gear Slewing
Circumstance Temperature	℃	-20 ~ 55
Power Supply (customisable)	/	380V / 50Hz
Boom (3-Section R-Fold)
1st Section — Length	m	14.5
1st Section — Articulation	°	0 ~ 86
2nd Section — Length	m	9.2
2nd Section — Articulation	°	0 ~ 180
3rd Section — Length	m	8
3rd Section — Articulation	°	0 ~ 180
Delivery Line
Delivery Pipeline Diameter	mm	Φ125 × 4.5
Delivery Hose Diameter	in × mm	5" × 3000
Power & Hydraulics
Motor Power	kW	11
Hydraulic Pressure	MPa	28
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	18150
Max. Lifting Unit	kg	4150

Dimensions & Working Range

The working-range diagram shows the area the PB32A-3R-II can place concrete across from a single position — the 31.7 m radius swept through a full 360°, plus the vertical envelope of the folding boom. The free-standing height of 21.3 m is the height the boom stands above its support without external bracing. Read the diagram with the climbing-frame and column drawings to plan the installation in your core or on your floor.

Applications

The PB32A-3R-II is engineered for high-rise structures with large floor plates, featuring an internal climbing mechanism that elevates the placing boom synchronously with the building's construction.

Large-floor-plate towers

Supports concrete placement across expansive floor plates in wide residential and commercial towers, reducing the requirement for multiple boom setups per level.

Core walls and elevator shafts

Utilizes shaft frame mounting for internal climbing within elevator shafts or core walls, optimizing space in restricted floor designs.

Podium and transfer slabs

Facilitates the continuous distribution of concrete over large areas for transfer slabs and podium decks when integrated with a high-capacity pump and riser pipeline.

Bridge pylons and tall piers

Applies to the construction of bridge pylons and tall piers by climbing the structural elements directly, eliminating repetitive crane lifts during continuous pour sequences.

FAQs

Why choose the 31.7 m PB32A-3R-II over the 27.7 m PB28A-3R-II?

The primary differentiator is the placement radius. Both models utilize a 3-section R-fold boom, 360° slewing, an 11 kW motor, and column-climbing mechanisms. The PB32A-3R-II incorporates a 14.5 m first section to achieve a 31.7 m radius, compared to the 27.7 m radius of the PB28A-3R-II.

How large a floor can it cover from one position?

With a 31.7 m radius and 360° continuous rotation, the boom covers a circular area approximately 63.4 m in diameter from a single setup. For floor plates exceeding this coverage, the climbing position is relocated, or multiple placing booms are deployed.

Does it climb the building by itself?

Yes. The system employs hydraulic cylinders to lift the boom assembly through floor frames or shaft frames. The boom elevates by its own standing height as the structure rises, operating independently of site cranes.

Is the placing boom the same as a concrete pump?

No. The placing boom functions strictly as the distribution terminal. A separate stationary or line concrete pump is required to drive concrete up a vertical riser pipeline to the boom.

Does it run on diesel or electricity?

The unit is electrically driven, operating on a 380V/50Hz supply with an 11 kW motor. It requires external site power or a generator and does not feature an onboard diesel engine.

What does it weigh, and what crane is needed to erect it?

The maximum single lifting unit weighs 4,150 kg, determining the minimum capacity required for the site crane during initial assembly. The total operational weight is 18,150 kg.

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, floor or shaft frames, and delivery pipelines are specified per project requirements.

Column-climbing placing boom series

The PB32A-3R-II is the 31.7 m model in the column-climbing placing boom series, which includes the 27.7 m PB28A-3R-II, the 32.4 m PB33A-4R-II, the 32.6 m PB33D-4R, and the 34.7 m PB35A-4R-E. 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 PB32A-3R-II interfaces with the riser to distribute concrete across floor decks, shear walls, and columns, completing the vertical and horizontal delivery sequence.

Column-climbing vs other configurations

Column-climbing booms are specified for structures where an internal core or elevator shaft facilitates continuous vertical progression. Spider or mobile placing booms serve lower elevations where crane relocation is viable; lattice-tower booms provide extreme free-standing heights via independent masts; and mobile boat booms support marine infrastructure. Selection depends strictly on the structural geometry and construction methodology.