Large-diameter pile cage welding machine.
Up to Ø3000mm and 24 m long.
The SLP 2500 and SLP 3000 are designed for large civil engineering projects, from viaducts, bridges and causeways to skyscrapers, wherever large-diameter, heavy cages are required.
Big shafts are built from sections. The machine makes the sections right.
The drilled shafts of bridge towers and metro stations often run deeper than any cage that can be lifted in one piece. In these cases the cage is produced in sections and spliced over the bore. The value of the machine is the geometry and repeatability of every section: straight bars, constant pitch, welded crossings. The splice above the hole goes quickly, and the cage goes down the shaft without drama.
Ø3000
Max. cage diameter, mm — 118 in, on the SLP 3000
24 m
Section length, 79 ft
over 30 t
Cage weight on the SLP 3000
Ø55mm
Longitudinal bar diameter, mm, on the SLP 3000
For building piles up to Ø2,000 mm — the larger share of most foundation packages — see
the SLP 1200 / 1500 / 2000 →Heavy cages, handled by the machine — not by people inside them.
A multi-tonne cage assembled on the ground means welders working inside the steel and cranes holding the load while they do. On the SLP the cage is built on driven wheel sets, rotated by the machine, and leaves the line ready for stiffening rings and lifting points.
Massive frame, reinforced lifting
Direct-drive heads, dual rack-and-pinion carriages and brushless motors, designed for cages over 30 t.
Bars up to Ø55 mm
The bar sizes of heavy shaft cages, with roller conveyors handling bars up to Ø40 mm.
PLC-controlled MIG welding
Set parameters on every crossing; dual-torch welding available as an option.
Sections ready to splice
Consistent geometry section after section, so joining over the bore is assembly, not rework.
Technical data.
Metric and US units. Values as published by EMG.
SLP 2500
Cage Ø 800–2,500 mm (32–98″)
Length 12, 18, 24 m (39, 59, 78 ft)
Max. cage weight 14 t (30,000 lb)
Bars 16–40 mm (#5–#11)
Spiral 6–20 mm (#2–#6) · pitch 50–500 mm
Installed power 15 kW
SLP 3000
Cage Ø 1,000–3,000 mm (39–118″)
Length up to 24 m (78 ft)
Max. cage weight 34 t (72,752 lb)
Bars 20–55 mm
Spiral 8–20 mm · pitch 50–500 mm
Installed power 40 kW
Where the argument is labour, weather and the crane schedule.
Large projects don't lack steel. They lack crews, lifting windows and hours in the day.
North America and Australia
Foundation contractors report chronic shortages of skilled rebar crews while bridge and transit pipelines grow. A cage line turns shaft cages from a labour problem into a scheduled output.
The Gulf
Summer midday work bans stop outdoor fabrication for hours a day. A covered cage line keeps producing — and keeps the concrete pouring window fed.
Remote sites
Cages Ø2.5 m (8 ft) for a power plant were produced on a remote site, far from the nearest service center — with the machine installed on the project and supported online. Customer and location under NDA.
Questions we hear from buyers.
How are 40 – 60 m cages made with 24 m sections?
As they are made everywhere: in sections, spliced over the bore as the cage is lowered. The machine’s job is to make every section straight and identical, so the splice is fast and predictable.
What bar sizes can it handle?
Longitudinal bars up to Ø55 mm on the SLP 3000 (Ø40 mm, 1.57 in, on the SLP 2500), spiral up to Ø20 mm, pitch 50–500 mm. Heavy-shaft designs with large bars are exactly what the frame is sized for.
How many sections per shift?
A Ø3000 mm section is not a Ø350 mm cage; output depends entirely on the design. Send the drawings of your typical shaft cage and we reply with an estimate for your configuration.
What does the machine need on site?
A covered area with a level floor, a power supply to our specification, enough room to feed in bars and move out the finished cages. You will also need a crane sized for the cages you plan to produce. We send the layout drawings with the quotation. The machine ships in containers, and our engineers carry out the installation and train your operators.
Answers in brief. For your shaft schedule and cage drawings, an engineer replies with the machine, the layout and the production estimate.
