The versatile S850 Quadra Bolster Concrete Slipform Paver is designed to be the paver of choice for all your paving needs from 12 ft. to 34 ft. (3.5 m to 10.36 m). With optional tractor frame extensions, the S850QB paver is capable of paving widths up to 41 ft. (12.5 m). The S850QB is agile enough for economic use on cut up urban and residential paving work without sacrificing the weight, power, and balance required to produce superior riding highway and airport concrete pavements. The S850QB has its weight in all the right places. It has the weight of a mainline slipform paver and the agility of a smaller machine. The machine's center of gravity and the rear of the slipform conforming pan are almost perfectly centered between the front and rear crawler tracks.

The S850QB paver is equipped with counter rotation capability like all G&Z pavers, where the operator can quickly re-orientate the S850 crawlers into the counter-rotate position and rotate the machine 360 degrees withing the machine's overall width. Investment in S850 has never been more compelling.

The patented Quadra bolsters allow for two modes of paving: the "extended mode" for normal paving or the "compressed mode" for paving in tight radius paving. Quadra bolsters allow for two modes of transport: the "extended mode" for straddling and self-loading on a drop deck trailer and the "compressed mode" for walking and steering (with our without the paving kit) onto a 10 ft. (3.04m) wide trailer.

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Min. paving width
Max. paving width

12' (3.5 m)
41' (12.5 m) without DBI

App. operating length

23' - 3 1/4" (7.1 m)

Tractor telescopic capability

12' to 26' (3.6 m to 7.9 m) without bolt-in extensions


6-Cylinder CAT C9.3B ACERT Diesel Engine US Federal Tier 4f IOPU / EU Stage V "C" Horsepower @ 2100 RPM, 415 hp (309 kW)

Required track path

2' - 1" (635 mm)

Diesel fuel tank / DEF tank

  180 U.S. gallon (681 l)

App. operating weight:
Base machine 24' (7.5m) without optional equipment

108,000 lbs. (48,988 kg)

Hydraulic tank

  190 U.S. gallon (718 l)

Add. weight of FF and supports

 5,400 lbs. (2,449 kg)

Water tank

  200 U.S. gallon (756 l) Polyurethane

Add. weight of Front TBI

1,000 lbs. (452 kg)

Concrete poker vibrators

  Hydraulic or Electric

App. operating height

14' - 3 1/8" (4.3 m) plus the slab thickness

Crawler track drive

  Working Speed (app.): 0 - 16 fpm (0 - 4.88 mpm)
  Travel Speed (app.): 0 - 74 fpm (0 - 22.55 mpm)

** 'Max. Paving Thickness' reflects standard machine. Custom paving thicknesses can be achieved.
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