Area of Application

The TSV-2000-ZD is a medium energy rockfall catchment fence that has a hinged connection to the base plate and so requires upslope retaining ropes to support the post head. It has been tested according to the ETAG 27 guidelines and carries a CE marking. It fully meets the requirements for Consequence Class 3 of Appendix E of the ONR 24810 “Technical protection against rockfall – Terms and definitions, actions, design and construction, and monitoring and maintenance” and carries the highest performance rating available according to the Austrian Department of Avalanche and Torrent Control’s rockfall catchment fence type list. As such, it may be used on projects with all levels of risk.

Rope Guidances

The upper and lower bearing ropes are led through a rope guidance that is integrated on each post head and base plate. A similar guidance is used for the middle ropes. Each guidance provides large curved surfaces to help protect the ropes and allow unobstructed movement. The guidance is designed to be robust and with no movable parts in order to ensure longevity and zero maintenance.

Integrated Ladder

Each post has an integrated ladder composed of rungs spaced at 50 cm intervals in the webbing of the I-beam. The ladder assists in the installation of the fence as well as routine inspection and maintenance.

Lateral Anchorage

Lateral anchoring or internal anchoring of long sections of fences are achieved normally with two anchors having the main bearing ropes and the middle ropes attached with brakes, thimbles and shackles. Brake elements on the middle ropes allow for more elongation than the upper and lower brakes to maximize energy absorption while maintaining a large residual height.

Retaining Rope Anchorage

The post head is secured using retaining ropes that lead to an upslope anchor in the middle of the field on either side of the post. This gives side-to-side stability of the post as well as the ability to lead forces into the ground. One anchor is shared between two posts. For this system, there are no brake elements on the retaining ropes.

GDV Brake Element

The GDV series of brake elements are steel profiles with a roller which is pulled along its length when a force is applied, causing deformation. The gauge and length of the steel strip can be altered to control the amount of energy absorbed and the total displacement. These brakes are highly efficient and require minimal off-set from the posts.
ModelTSV-2000-ZD H4
StyleHinged System
Energy Class5
Maximum Energy Level
Certified/Tested [kJ (ft∙tons)]
2000 / 2311
(737 / 852)
Service Energy Level
Certified/Tested [kJ (ft∙tons)]
Approved Heights
[m (ft)]
4.0 - 5.0
(13.1 - 16.4)
VerificationFull Scale Tested
CertificationETAG27 / EAD 340059-00-0106 certified
Test Report Summary
Test Height
[m (ft)]
Maximum Elongation
[m (ft)]
Residual Height ClassA (≥50%)
Component FailureNone
Primary Net OpeningNone
Secondary MeshNone
European Technical Assessment ETA
Issuing BodyOIB Austrian Institute of Construction Engineering
Date of IssueNovember 7, 2014
Certificate of Conformity
Certificate Number1379-CPR-022/14
Issuing BodyTVFA-ZERT TU Graz
Date of IssueJuly 26, 2017
Primary Net
ModelOmega-Net 9.0/185
TypeSteel Wire Cable
Rope Diameter
[mm (inch)]
Rope Construction1 x 7 Spiral
Single Wire Diameter
[mm (inch)]
Corrosion ProtectionZn or ZnAl (Class A)
Mesh Size
[mm (inch)]
185 x 185
(7.3 x 7.3)
Unit Weight
Mesh Tensile Strength
calculated [kN/m (lbf/ft)]
Connection to Main RopesThreaded
Connection to Adjacent Panel7/16" Shackle

The primary net material used in Trumer systems is called the Omega-Net. It is a steel cable net made from spiral rope that has thick individual wires to resist abrasion. The strands of rope are pre-bent into arcs resembling an omega shape and then woven together to make the net. This process yields an extremely strong net with high flexibility and energy absorption characteristics.

Bearing Ropes
per fence segment
Rope Diameter
[mm (inch)]
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Element
per rope
Brake Element ModelGDVII 45-12-130, 120x8-1500
Middle Ropes
per fence segment
Rope Diameter
[mm (inch)]
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Element
per rope
Brake Element ModelGDVII 45-12-130, 120 x 8-3000
GDVII 45-12-130, 120 x 6-4000
Retaining Ropes
per post
Rope Diameter
[mm (inch)]
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Element
per rope
Brake Element Modeln/a

Support Structure
Post TypeHEA 220
Integrated LadderRungs every 0.5 m (19")
Rope GuidesIntegrated
Post Weight
as tested ([kg (lbs)]
Base Plate ConnectionTongue and Pin
Base Plate Foot Print
([mm (in.)]
790 x 250
(31 x 10)
Base Plate Weight
[kg (lbs)]
per base plate
Post Base Support
1.Post; 2.Rope Guide; 3.Base Plate; 4.Hinge Pin; 5.Anchor Nut; 6.Washer; 7.Anchor; 8.Micropile Tube
Retaining Rope Anchorage
1.Retaining Rope; 2.Anchor Eye; 3.Anchor
Lateral Anchorage
1.Side Stabilization Rope; 2.Upper Bearing Rope; 3.Lower Bearing Rope; 4.Middle Bearing Rope; 5.Brake Element; 6.Anchor Eye; 7.Anchor
Anchor Forces
Base Plate
Fk,par [kN (kips)]
Lateral Anchor
Fk,lat [kN (kips)]
Retaining Rope Anchor
Fk,ret [kN (kips)]
Typical Recommended Anchors Based on Steel Grade
Anchor PositionQuantity
per 50 m
10 m post spacing
500/550 MPa
(e.g. GEWI)
670/800 MPa
(e.g. GEWI Plus)
min 470 MPa
(e.g. IBO)
Base Plate123228site dependent
Typical Cross Section
1.Post; 2.Rope Guide; 3.Base Plate; 4.Omega-Net; 5.Retaining Rope; 6.Anchor Eye; 7.Retaining Anchor; 8.Anchor
Typical Layout
1.Post; 2.Upper Bearing Rope; 3.Lower Bearing Rope; 4.Middle Bearing Rope; 5.Retaining Rope; 6.Side Stabilization Rope; 7.Retaining Anchor; 8.Lateral Anchor
MEL Pre-test Photo, Side
MEL Post-test Photo, Side
MEL Pre-test Photo, Front
MEL Post-test Photo, Front
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