Cable Systems
OVM Technologies

Cable Systems

OVM provides complete cable system design, installation, monitoring and maintenance services. Products meet FIB, PTI and CIP international standards, with test reports from CTL and EMPA. Available in steel strand stay cable, high-strength wire stay cable, and carbon fiber cable types.

Key Features

Why specify OVM cable systems

  • Cables are prefabricated on a production line in the factory and packed in reels for transport.
  • Integral tensioning gives accurate tensile tonnage and uniform cable force; adjustment is convenient and verified by sensor.
  • Extension products — external dampers and load cells — can be applied to the system for special requirements.
  • Anti-corrosion design graded to C5-M, the highest ISO 12944 class for harsh marine environments.
  • Single-strand installation and replacement, with real-time cable force monitoring across the service life.
Types

Systems we supply

Cable-stayed bridges

Multi-strand and parallel wire stay cables from OVM250 and OVM280 through to PWS, with single-strand installation, adjustment and replacement.

Extradosed bridges

The OVMAT saddle system, applied on more than 500 bridges worldwide, carrying the cable over the pylon without a separate anchorage.

Suspension bridges

PPWS main cable, hangers, saddles, cable clamps and replaceable anchor block systems, plus the erection plant to install them.

Arch bridges

Tie bars and hanger cables with anchorage types for the arch end, beam end and deck end, including adjustable fork anchorages.

Buildings & space structures

GJ prefabricated strand cables and flexible cable systems for roofs, footbridges and architectural structures.

Cable Systems — OVM project photography
Cable Systems — OVM project photography
Cable Systems — OVM project photography
Product Range

The systems in detail

Each OVM cable systems variant, with its published features and the labelled components of its assembly.

01

OVM250 Multi-Strand Stay Cable System

The established OVM multi-strand stay cable, built around a wedge-type multi-anchor head and individually sheathed, greased strands. Rated to a 250 MPa fatigue stress amplitude and applied across cable-stayed bridges worldwide.

02

OVM280 Multi-Strand Stay Cable System

An innovative development of the OVM250 strand cable, with superior fatigue resistance and durability. Optimising the anchorage unit, reducing the strand transition-section angle and improving the strand base metal raises the comprehensive fatigue stress amplitude to 280 MPa.

  • From the S-N curve of cable fatigue testing, fatigue life is close to 4× that of a 200 MPa stress-amplitude cable and 1.71× that of a 250 MPa cable.
  • The free length carries a multi-layered, uninterrupted anti-corrosion structure — more than four layers from the outside in.
  • Metal components of the anchorage unit are coated in multiple alloy and sealed coatings; strands in the anchor cavity are filled with oil-based wax.
  • The complete system meets rigorous dynamic watertightness standards, with an anti-corrosion grade of C5-M under ISO 12944.
  • Advanced wind-resistance and vibration-reduction measures, fire prevention technology and smart monitoring extend the reach of long-span cable-stayed structures.
03

OVMAT Stay Cable System for Extradosed Bridges

Developed specifically for extradosed cable-stayed bridges and applied on more than 500 bridges worldwide. An innovative saddle simplifies the structure at the pylon and reduces cost, while single strands remain individually adjustable and replaceable.

  • Outstanding anti-fatigue performance, compliant with CIP, fib and PTI recommendations.
  • Multi-barrier corrosion protection across the free length and the anchorage.
  • Saddle design removes the need for separate anchorages at the pylon.
  • Single-strand adjustment and replacement without decommissioning the cable.
  • Real-time cable force monitoring integrated into the system.
04

Parallel Wire Stay Cable System (PWS)

Hot-extruded HDPE-protected high-strength wire cable with cold-cast heading anchorage, applied to arch bridges, cable-stayed bridges, roof space structures and suspension bridges.

  • Galvanized steel wires are drawn parallel into a bundle, then twisted concentrically 2–4° to the right, wrapped with high-strength polyester and hot-extruded with an HDPE sheath.
  • Cables are cut and marked to the confirmed unstressed length, normally referenced at 20 °C.
  • Epoxy-coated wire is available, electrostatically sprayed with a special epoxy powder to build a protective coating with strong anti-corrosion properties.
  • Two double-layer PE sheath structures are offered: double-layer PE, and PE with a double helix for aerodynamic stability.

Type I — Anchorage with nut (arch end, deck end and beam end)

  1. 01Stressing-end or dead-end anchorage
  2. 02Bearing plate
  3. 03Arch rib or beam
  4. 04Pre-embedded pipe
  5. 05Cable

Type II — Dead-end anchorage with fork (arch end and beam end)

  1. 01Pin
  2. 02Fork
  3. 03Connecting socket
  4. 04Sealing sleeve
  5. 05Cable

Type III — Adjustable anchorage with fork (mainly deck end)

  1. 01Pin roll
  2. 02Adjusting fork
  3. 03Adjusting rod
  4. 04Connecting sleeve
  5. 05Connecting socket
  6. 06Sealing sleeve
  7. 07Cable

Arch bridge hanger — design guidance

  • Hanger safety factor n = 2.5–3.
  • The shortest free length of a hanger should be not less than 2 metres.
  • The lower embedded pipe must extend 100–150 mm beyond the deck structure to ensure waterproofing at the base.
05

GJ Prefabricated Strand Cable System

OVM's proprietary cable with integral swaging anchorage: the whole strand bundle is swaged together at both ends, giving reliable anchoring, a compact head, and easy stressing and adjustment. Epoxy-coated, galvanized or bare strand can be used.

  • Strands are integrally swaged and anchored at both ends, so they will not slide under high stress, low stress, or even negative stress conditions.
  • Swaging anchorage is at least 30% smaller than cold-cast or hot-cast anchorage of the same capacity, reducing the reserved holes in the structure.
  • Each strand is individually greased, PE sheathed and isolated; the bundle is then taped with high-strength polyester belt and hot-extruded with HDPE — three anti-corrosion layers, so rust on one wire cannot spread.
  • Individual PE sheathing raises structural damping above that of steel wire cable, giving excellent anti-vibration performance.
  • A special technique reduces tensile stress in the HDPE outer layer, preventing stress cracking and improving durability.

Pylon end integral swaging anchorage

  1. 01Cap
  2. 02Integral swaging anchorage
  3. 03Spherical nut
  4. 04Spherical bearing plate
  5. 05Bearing plate
  6. 06Pre-embedded tube
  7. 07Upper damper
  8. 08Baffler
  9. 09Completed strand cable

Girder end integral swaging anchorage

  1. 01Cap
  2. 02Integral swaging anchorage
  3. 03Spherical nut
  4. 04Spherical bearing plate
  5. 05Bearing plate
  6. 06Pre-embedded tube
  7. 07Lower damper
  8. 08Water-proof cover
  9. 09Completed strand cable

Verification testing

  1. 01Static load test
  2. 02Fatigue performance test
  3. 03Watertightness performance test
06

Suspension Bridge Cable System

A complete product range for suspension bridges: PPWS main cable and hangers with outstanding anti-corrosion properties, replaceable anchor block systems, saddles and clamps — supported by three major construction equipment sets.

  • Advanced replaceable anchor block system at the anchorage chamber.
  • PPWS main cable and hangers with outstanding anti-corrosion properties.
  • Three major construction equipment sets: cable crane, wrapping machine and main cable compressor.
07

External & Flexible Cable Systems

Tie cables for arch bridges, external cables for box girders, and flexible cable systems for roof and space structures, drawn from the same anchorage and corrosion-protection technology as the stay cable range.

Technical Reference

How the system fits together

Assembly drawings and cross-sections from the OVM cable systems engineering documentation.

Stay Cable Anchorage Assembly — OVM Cable Systems technical drawing

Stay Cable Anchorage Assembly

Saddle & Pylon Configuration — OVM Cable Systems technical drawing

Saddle & Pylon Configuration

Stay Cable Cross-Section — OVM Cable Systems technical drawing

Stay Cable Cross-Section

Anchor Head Assembly (Exploded View) — OVM Cable Systems technical drawing

Anchor Head Assembly (Exploded View)

Galvanized Wire Stay Cable — Schematic — OVM Cable Systems technical drawing

Galvanized Wire Stay Cable — Schematic

System Supply

Components we supply

The individual parts that make up a complete cable systems installation.

Main Cable — OVM Cable Systems01

Main Cable

Anchor Blocks System — OVM Cable Systems02

Anchor Blocks System

Hanger — OVM Cable Systems03

Hanger

Saddle — OVM Cable Systems04

Saddle

Cable Splay Saddle — OVM Cable Systems05

Cable Splay Saddle

Cable Clamp — OVM Cable Systems06

Cable Clamp

Cable Tightening Machine — OVM Cable Systems07

Cable Tightening Machine

Cable Supported Crane — OVM Cable Systems08

Cable Supported Crane

Wire Winding Machine — OVM Cable Systems09

Wire Winding Machine

Anchor Head, Wedge & Socket Assembly — OVM Cable Systems10

Anchor Head, Wedge & Socket Assembly

Anchor head, wedge, socket, nut, sealing set, and PE-sheathed strand.

Stay Cable Cross-Section — OVM Cable Systems11

Stay Cable Cross-Section

Complete Cable Assembly — OVM Cable Systems12

Complete Cable Assembly

Stressing Anchorage Detail — OVM Cable Systems13

Stressing Anchorage Detail

Standards & Compliance

Designed, tested and certified against

OVM cable systems comply with the specifications and recommendations below.

GB/T 14370

Anchorage, grip and coupler for prestressing tendons

PTI DC45.1 / PTI-2007

Recommendations for stay cable design, testing and installation

fib Bulletin 30

Acceptance of stay cable systems using prestressing steels

CIP

Cable stay system recommendations

GB/T 18365

Hot-extruded PE protected high-strength wire cable for cable-stayed bridges

CJ/T 297-2008

High density polyethylene sheathing compounds for bridge cable

ASTM A416

Steel strand, uncoated seven-wire, for prestressed concrete

GB/T 5224

Steel strand for prestressed concrete

GB/T 25823-2010

Individual epoxy-coated wire prestressing steel strand

ISO 12944

Corrosion protection of steel structures by protective paint systems

Certification

Approvals and test reports

  • Test reports from CTL (USA) and EMPA (Switzerland)
  • Static load, fatigue performance and watertightness testing on completed cable assemblies
Construction Service

What OVM undertakes on site

Beyond product supply, OVM works as a specialist contractor across the full scope below.

  • Design consultation for strand, wire and extradosed stay cable systems
  • Fabrication and installation of multi-strand, PWS and extradosed stay cables
  • Monitoring and adjustment of cable force during and after erection
  • Repair, replacement and maintenance of existing cable systems
  • Design, fabrication and operation of deck erection cranes and hanging baskets
  • Main beam segment lifting and assembly for cable-stayed bridges
  • Installation of main cable saddles, cable clamps and hangers on suspension bridges
  • Coating protection and maintenance of suspension bridge main cables
  • Tied arch bridge work — cable lifting systems, fastening stays, arch rib and deck beam lifting
  • Lease of special tools and equipment for stay cable works
Track Record

Reference Projects

Malaysian projects carrying OVM cable systems.

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