Home > PB35A — 35 m Column-Climbing Concrete Placing Boom (Largest Reach)

PB35A — 35 m Column-Climbing Concrete Placing Boom (Largest Reach)

The PB35A is the largest-reach model in the TRUEMAX column-climbing placing-boom line. Its four-section boom places concrete over a full 35 m radius — the most coverage of any climbing boom in the range — so a single set-up reaches across the widest floor plates that the smaller booms would have to cover in two positions. The four sections are long and evenly matched, and the end arm folds back through 210° for the deepest tuck in the family, combining maximum distance with close-in placing. Driving that long boom firmly takes the biggest hydraulics in the climbing line: a 22 kW motor at 30 MPa.

Like the rest of the family it is a self-climbing boom — it rides up a floor frame or core / shaft frame as the building grows, fed by a separate stationary or line concrete pump up a riser, and distributes that concrete across the deck. Being the largest, it is engineered with a 16.2 m free-standing height, lower than the smaller booms, because the longer, heavier boom is braced into the structure at closer intervals; and it is rated for a -20 °C to 48 °C operating range. It runs on a 380V/50Hz supply through the 22 kW motor, is built and tested at the TRUEMAX factory in Haining, holds ISO 9001:2015 and CE certification, and is part of a placing-boom line exported to more than 120 countries.

1. Largest 35 m reach — The widest placing radius in the column-climbing range, covering the biggest floor plates from a single climbing position so the boom is set up and relocated less often on large towers.

2. 210° end-section fold — The fourth arm folds back through 210° — the deepest in the family — so the same boom that reaches 35 m out can also tuck the hose in close to the core.

3. Largest hydraulics in the climbing line — A 22 kW motor at 30 MPa drives the long four-section boom firmly and smoothly under load.

4. Four long, evenly-matched sections — Four R-fold arms of similar length give a long, controllable reach and fold compactly for climbing and transport.

5. Self-climbing on the structure — Climbs on a floor or shaft frame and lifts itself up its standing height as the building rises — no crane lift between floors.

6. Full 360° gear slewing — Gear slewing rotates the boom a complete circle, with a cushion valve smoothing start and stop for steady placing at full reach.

7. Balance-arm-free, integrated base — No counterweight arm for free rotation; pump station and control cabinet share the lower support for quick installation and fewer faults.

8. Flexible control and configuration — TRUEMAX electric-proportional, radio and cable remotes on Omron / Schneider electrics; columns in 4–10 m lengths with floor or shaft climbing frames.

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Technial Parameters

Item	Unit	PB35A
Performance
Max. Radius of Placing Boom	m	35
Free-Standing Height (to boom root joint)	m	16.2
Slewing Range	/	360°
Mode of Slewing	/	Gear Slewing
Circumstance Temperature	℃	-20 ~ 48
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

Swept through 360°, the 35 m radius covers a circle about 70 m across from one position — the largest single-set-up footprint in the climbing range. The working-range diagram shows that envelope plus the deep reach the 210° end fold adds. Note the 16.2 m free-standing height: the larger boom is tied into the structure more often than the smaller models, so plan the bracing and climbing-frame positions with the structural drawings.

Applications

The PB35A is the boom for the biggest pours — large floor plates and major towers where maximum coverage from each position saves time and set-ups.

Large-floor-plate and landmark towers

On wide commercial floors and landmark high-rise, the 35 m radius reaches across the slab in one sweep, cutting the number of climbing positions needed to pour a full floor.

Large cores and shafts

With a shaft frame the boom climbs a large core or lift shaft and still reaches the full surrounding deck, suited to buildings with a substantial central core.

High-volume structural floors

The 22 kW / 30 MPa hydraulics hold the long boom steady through continuous, high-volume structural pours, fed by a pump up the riser.

Major bridge pylons

The self-climbing principle scales to tall, large bridge pylons, where maximum reach lets the boom serve a wide pour area as the pylon rises.

FAQs

Why choose the PB35A over the smaller column-climbing booms?

Reach. At 35 m it has the largest radius in the climbing range — covering bigger floors from one position than the 28 m PB28A, 32 m PB32A or the 32.5 m PB33A/PB33B. The trade-offs of that size are a heavier maximum lifting unit (5,200 kg, so a larger erection crane), a lower free-standing height (16.2 m) and a 48 °C upper operating temperature. Choose the PB35A when floor size makes the extra reach worth those trade-offs.

Why is the free-standing height lower than the smaller booms?

Because the boom is longer and heavier. Free-standing height is how high the boom can stand above its support without extra bracing; a larger boom carries more weight up high, so it is tied into the structure at closer intervals and its unbraced standing height is 16.2 m rather than the ~21 m of the smaller models. In practice the boom is braced to the building as it climbs, so this does not limit the floors it serves.

What operating temperature is it rated for?

The PB35A is rated for -20 °C to 48 °C, with HM46 anti-wear hydraulic oil for 5–55 °C and HM32 for -20–5 °C. The 48 °C upper limit is slightly below the smaller booms' 55 °C; for very hot climates, tell us your site conditions and we will confirm the configuration and any cooling provisions.

How large a floor can it cover from one position?

Slewing 360° at 35 m, it places concrete anywhere within a circle roughly 70 m across from a single climbing position — the largest in the range. Bigger plates are handled by relocating the climbing position or running more than one boom.

Is it a pump, and how does it climb?

It is a placing boom, not a pump: a separate stationary or line pump feeds concrete up a riser and the PB35A distributes it across the floor. It climbs on a floor or shaft frame, lifting itself up as the structure rises — no crane lift between floors.

Electric or diesel, and what crane is needed to erect it?

Electric — a 380V/50Hz supply driving a 22 kW motor, the largest in the climbing line. There is no on-board engine. Total installed weight is 17,824 kg, and the maximum single lifting unit is 5,200 kg, which is the figure to size the erection crane against.

What is supplied, and how is it shipped?

The package is the boom, lower support, hydraulic pump station, control cabinet and remote. Columns, the floor or shaft climbing frame, delivery line, hose, spares, installation and commissioning are configured to your building and quoted separately. Send your floor and core details for a tailored proposal.

The top of the column-climbing range

The PB35A sits at the top of the TRUEMAX column-climbing line for reach: 35 m, above the 32.55 m PB33B-4R, 32.4 m PB33A-4R-II, 31.7 m PB32A-3R-II and 27.7 m PB28A-3R-II. The smaller booms are lighter and stand higher unbraced; the PB35A trades some of that for the largest single-position coverage in the range. If your floors are large and you want to minimise set-ups, the PB35A is the climbing boom to specify; for smaller plates or where weight is tight, one of the shorter models fits better.

How the placing boom completes the pumping line

In a high-rise pour, concrete moves from batching plant to truck mixer to a stationary or line pump that lifts it up a riser to one point on the floor. The placing boom turns that point into floor-wide reach — and with 35 m of radius, the PB35A turns it into the widest reach in the climbing range. One operator places the whole floor by remote, with the pump supplying concrete continuously up the riser.

Sizing reach to your floor plate

The right placing-boom radius is the one that covers your floor from as few positions as possible without over-buying machine. A boom that just reaches the floor edge from a central core means one set-up per floor; a shorter boom may need two. The PB35A's 35 m radius is chosen when the floor plate is large enough that the smaller booms would force extra positions — its coverage pays back in pour time and labour on big, repetitive floors, while smaller, lighter booms remain the better value on modest plates.