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.

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.
ModelISOSTOP 3000 Evo
StyleHinged System
Energy Class6
Maximum Energy Level Certified/Tested [kJ]3000 / 3066
(1106 / 1131)
Service Energy Level Certified/Tested [kJ]1000
Approved Heights [m (ft)]5.0 - 6.0
(16.4 - 19.7)
VerificationFull Scale Tested
CertificationETAG 27 Certified
Test Report Summary
European Technical Assessment ETA
Test Height [m (ft)]5.0
Maximum Elongation [m (ft)]7.68
Residual Height ClassA (≥50%)
Component FailureNone
Primary Net Opening [m (ft)]2.16
Secondary MeshNone
ETA NumberETA-22/0861
Issuing BodyTSUS Building Testing and Research Institute
Date of IssueJanuary 17, 2023
Certificate of Conformity
Report Number1301-CPR-2136
Issuing BodyTSUS Building Testing and Research Institute
Date of IssueMarch 3, 2023
Primary Net
ModelRN 350/3/4
TypeRing Net
Points of Contact4
Single Wire Diameter [mm]3
Corrosion ProtectionZn or ZnAl (Class A or B)
Arc Diameter [mm (inch)]350
Unit Weight [kg/m2 (lb/ft2)]9.85
Mesh Tensile Strength calculated [kN/m (lbf/ft)] n/a
Connection to Main RopesThreaded
Connection to Adjacent Panel5/8" Shackle
Ring Net

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 segment4
Rope Diameter [mm (inch)]24
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Elements per rope1
Brake Element ModelISOROD 200
Middle Ropes
Quantity per fence segment3
Rope Diameter [mm (inch)]20
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Elements per rope2
Brake Element ModelISORDO 150
Retaining Ropes
Quantity per fence segment2
Rope Diameter [mm (inch)]24
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Elements per ropen/a
Brake Element Modeln/a
Support Structure
Post TypeRHS 250/150/6.3
Integrated LadderDetachable
Rope GuidesIntegrated
Post Weight as tested [kg (lbs)]240
Base Plate ConnectionTongue and Pin
Base Plate Foot Print [mm (in.)]800 x 410
(31 x 16)
Base Plate Weight [kg (lbs)]54
Anchors per base plate2 / 4
Post Base Support
1.Post; 2.Rope Guide; 3.Base Plate; 4.Hinge Pin; 5.Anchor; 6.Bolt
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 Rope; 5.Brake Element; 6.Anchor Eye; 7.Anchor
Anchor Forces
Base Plate Tension (Loose Ground) FLGA,ten [kN (kips)] 272
Base Plate Compression (Loose Ground) FLGA,pres [kN (kips)] 192
Base Plate Shear (Rock/Foundation) FMF,shear [kN (kips)] 48
Lateral Anchor A Fk,lat,A [kN (kips)] 277
Lateral Anchor B Fk,lat,B [kN (kips)] 206
Lateral Anchor C Fk,lat,C [kN (kips)] 272
Retaining Rope Anchor Fk,ret [kN (kips)] 292
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 Plate12 / 242522n/a
Lateral2 / 42522R32-280
Typical Cross Section
1.Post; 2.Vertical Rope; 3.Rope Guide; 4.Base Plate; 5.Ring Net; 6.Retaining Rope; 7.Anchor Eye; 8.Retaining Anchor; 9.Anchor
Typical Layout
1.Post; 2.Upper Bearing Rope; 3.Lower Bearing Rope; 4.Middle Ropes; 5.Retaining Rope; 6.Side Stabilization Rope; 7. Retaining Anchor; 8.Lateral Anchor