The PB51AT-4R-E is the flagship of the TRUEMAX placing-boom range — the largest the company builds. It is a free-standing lattice tower placing boom that reaches a 51 m radius from a 46 m free-standing height, combining the greatest reach and the greatest height of any TRUEMAX boom in a single, self-supporting tower. Where the 38 m model serves large pours, the PB51AT-4R-E is built for the very largest: vast floor plates and tall structures that demand maximum coverage from one fixed position.
That scale is carried by a heavier-duty mast. The PB51AT-4R-E stands on 2 × 2 m lattice sections — twelve standard L68A1 sections on a 2 × 2 × 7.5 m base — noticeably bigger and stronger than the 1.6 m mast of the 38 m model, sized to hold the longer 51 m boom and the greater height. It self-erects, adding its own mast sections through a telescopic cage, and runs electro-hydraulic proportional control for smooth movements at the scale of a 21.5 m first boom section. Fed by a separate concrete pump up the mast, it runs on a 380V/50Hz supply with a 37.5 kW motor, and is built and tested at the TRUEMAX factory in Haining to ISO 9001:2015 and CE standards, within a line exported to more than 120 countries.
1. Largest 51 m reach — TRUEMAX's biggest placing boom — a 51 m radius covers the widest footprint of any model in the range from a single tower position.
2. 46 m free-standing height — The tower stands 46 m on its own mast unbraced, the greatest free-standing height in the range, and more when tied into an adjacent structure.
3. Heavy-duty 2×2 m lattice mast — Twelve 2 × 2 × 3 m L68A1 sections on a 2 × 2 × 7.5 m base form a stronger mast than the smaller tower model, engineered to carry the longer boom and greater height.
4. Self-erecting tower — A telescopic cage with its own pump and cylinder raises the tower and adds standard mast sections, so it builds its own height as construction rises.
5. 51 m four-section boom — Four R-fold sections — a long 21.5 m first arm and three ~9.8 m arms — extend to the full 51 m radius.
6. Electro-hydraulic proportional control — Proportional control keeps the long boom's movements smooth and low-shock at this scale, for precise, stable placing.
7. Full 360° gear slewing — Gear slewing turns the boom a complete circle at the top of the mast.
8. Radio remote, quality components — Wireless radio remote operation, with hydraulic and electrical parts from well-known international brands, on a 380V/50Hz, 37.5 kW drive.
