Area of Application

The TSC-100-oA is a low energy rockfall catchment fence that utilizes a fixed-post and thus requires no upslope retaining ropes. 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. 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.

Base Plate

As with all fixed-rotation systems, the base plate is integrated into the post. The lower bearing rope is led through a guidance attached to the base plate having a curved surface both horizontally and vertically to assist deflection of the rope. The base of the post is secured to the foundation/subsurface through three bolts or rock anchors.

AVT-phx Brake Element

The AVT-phx series of brake elements are steel coils that unravel when a force is applied. The gauge, width and number of coils can be specified in order to control the amount of energy absorbed and the total displacement. With no moving parts, these are some of the safest and most reliable brakes in the industry.
StyleFixed Rotation
Energy Class0
Maximum Energy Level Certified/Tested [kJ]100 / 107
(37 / 39)
Service Energy Level Certified/Tested [kJ]n/a
Approved Heights [m (ft)]2.0 - 2.5
(6.6 - 8.2)
VerificationFull Scale Tested
CertificationETAG27 / EAD 340059-00-0106 certified
Test Report Summary
Test Height [m (ft)]2.0
Maximum Elongation [m (ft)]3.08
Residual Height ClassA (≥50%)
Component FailureNone
Primary Net Opening [m (ft)]None
Secondary MeshNone
European Technical Assessment ETA
ETA NumberETA-14/0472
Issuing BodyOIB Austrian Institute of Construction Engineering
Date of IssueMay 18, 2015
Certificate of Conformity
Report Number1379-CPR-022/14
Issuing BodyTVFA-ZERT TU Graz
Date of IssueJuly 26, 2017
Primary Net
ModelOmega-Net 6.0/135
TypeSpiral Rope Net
Rope Diameter [mm (inch)]6.0
Rope Construction1 x 7 Spiral
Single Wire Diameter [mm]2.0
Corrosion ProtectionZn or ZnAl (Class A)
Mesh Size [mm (inch)]135 x 135
(5.3 x 5.3)
Unit Weight [kg/m2 (lb/ft2)]3.6
Mesh Tensile Strength calculated [kN/m (lbf/ft)] 246
Connection to Main RopesThreaded
Connection to Adjacent Panel5/16" 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
Quantity per fence segment2
Rope Diameter [mm (inch)]16
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Elements per rope2
Brake Element ModelAVT-phx 60/30-1.5
Middle Ropes
Quantity per fence segmentn/a
Rope Diameter [mm (inch)]n/a
Corrosion Protectionn/a
Brake Elements per ropen/a
Brake Element Modeln/a
Retaining Ropes
Quantity per fence segmentn/a
Rope Diameter [mm (inch)]n/a
Corrosion Protectionn/a
Brake Elements per ropen/a
Brake Element Modeln/a
Support Structure
Post TypeHEA 140
Integrated LadderRungs every 0.5 m
Rope GuidesIntegrated
Post Weight as tested [kg (lbs)]120
Base Plate ConnectionFixed
Base Plate Foot Print [mm (in.)]790 x 300
(31 x 12)
Base Plate Weight [kg (lbs)]n/a
Anchors per base plate3
Post Base Support
1.Post; 2.Rope Guide; 3.Base Plate; 4.Anchor Nut; 5.Washer; 6.Anchor; 7.Foundation
Base Plate Anchor Layout
Lateral Anchorage
1.Side Stabilization Rope; 2.Upper Bearing Rope; 3.Lower Bearing Rope; 4.Brake Element; 5.Anchor Eye; 6.Anchor
Anchor Forces
Lateral Anchor Fk,lat [kN (kips)] 116
Slope Parallel Force H at base plate [kN (kips)] 110
Tension Force per tension anchor at base plate, Fk,ten [kN (kips)] n/a
Bending Moment at foot of post as tested, MFOK [kNm (ton-ft)] 104
Typical Recommended Anchors Based on Steel Grade
Anchor PositionQuantity per 50 m 10 m post spacing500/550 MPa (e.g. GEWI)670/800 MPa (e.g. GEWI Plus)min 470 MPa (e.g. IBO)
Base Plate182522n/a
Typical Cross Section
1.Post; 2.Rope Guide; 3.Base Plate; 4.Omega-Net; 5.Anchor; 6.Foundation
Typical Layout
1.Post; 2.Upper Bearing Rope; 3.Lower Bearing Rope; 4.Side Stabilization Rope; 5.Lateral Anchor
MEL Pre-test, Side
MEL Post-test, Side
MEL Pre-test, Front
MEL Post-test, Front
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