Tensioning systems

Our product range for construction with post-tensioning or prestressing reinforced concrete technologies includes:

  • wide selection of stressing jacks, strand pushing machines (up to 300 meters), grouting machines
  • Stressing heads for any anchor design and system
  • All our stressing jacks can be equiped with or without wedging seating device
  • Special designs for our jacks such as flat, twin cylinder, lightweight (aluminium and CF)
  • Suitable hydraulic power units
  • Official factory calibration
  • Strand uncoilers and wire cages
  • Accessories and spare parts for all the quipment
  • Post-tensioning anchorage in all sizes and quiantities, for any application.
  • Other handling equipment.

We will be happy to advise you on the best solution for your application.

 

Post-tensioning with STS DN-19 multistrand jack — Aiport Moscow Sheremetyevo

Scope of applications:
  • Bridges,
  • Nuclear Power Plants,
  • LNG tanks,
  • Buildings,
  • Stadiums,
  • Slabs-on-ground,
  • Geotechnical,
  • Wind towers,
  • Stay cables and etc.
Stressing jacks

DN – the series of STS hydraulic jacks that are used for tensioning steel strands in post-tensioning or pre-stressing reinforced concrete structures such as Nuclear Power Plants Shells, buildings, stadiums, bridges, LNG tanks, beams, slab-on-ground, etc. STS Jacks are professional high quality and performance equipment for industrial use.

STS supplies strand tensioners and strand tensioning and wedging systems in all possible technical designs for any strand diameters. Multitensioning jacks for tensioning several strands simultaneously may be supplied with wedging module, and anchorage fixture in front or rear of the jack.

Below are the most popular modifications of our jacks. STS also can develop jacks that most suits your needs.

Type DN

No of Strands Name Stroke, mm Force, kN/tf, 70mPa A, mm B, mm C, mm D, mm E, mm
1 DN-1 200 266/27,1 130 60 65 750 1000
4 DN-4P 160 990/101 400/100 150 80/250 800 1450
4 DN-4-300 300 1116/114 210 150 130 930 1700
4 DN-4-100 100 1022/104 190 100 135 550 950
7 DN-7 250 1583/161 270 190 165 910 1670
12/13 DN-13 300 3165/322 300 140 210 1000 1850
19 DN-19 300 4265/435 350 200 240 1100 2000
19 DN-19/100 100 4462/455 300 130 240 650 1150
25/31 DN-31 200 7320/746 460 250 340 1170 2150
55 DN-55-150 150 13190/1344 510 330 405 1180 2150
55 DN-55-400 400 13430/1370 510 330 410 1400 2250
TABLE 1. STS hydraulic stressing jacks type — DN
Strand pushing machines

STS strand pushing machines provides efficient way of installing steel strands into moulds, duct channels and reinforcements. Strands are pushed individually directly from the coil with minimum use of manpower.
STS strand pushing machines are tested on long-range cables with up to 300 meters. Both bonded or unbonded steel types of strands. In addition STS can also supply uncoil devices and cages for strand and steel wire.
 

STS strand pushing machine Type UPKM

 

Bellow are the most popular models of STS strand pushing machines.

Type Max speed, m/s Weight Max force, kg Power station, l/min Power station, pressure, bar
UPKM 5 80 210 46 300
UPKS 9 250 170 80 320

TABLE 2. STS strand pushing machines

In case you do not find a suitable set of equipment, please get in contact with us.