TSC-3000-ZD Hybrid

Area of Application

The TSC-3000-ZD Hybrid is a high energy rockfall attenuator/hybrid rockfall fence that has a hinged connection to the base plate and so requires upslope retaining ropes to support the post head. A major difference to traditional fences is that the lower bearing rope has been removed from the base plate to a point lower down the slope (or optionaly completely left out). This allows debris that is stopped by the fence to progress further downslope to a point more suited for removal. It has been tested following the ETAG 27 guidelines.

Rope Guidances

The upper and middle ropes are led through a rope guidance that is integrated on each post head and foot. The guidance is designed to be robust and with no movable parts in order to ensure longevity and zero maintenance.

Base Plate

As with all hybrid rockfall systems, the lower bearing rope has been removed off the base plate to a position further downslope. This allows the debris to move through the system to a lower point. The base plate uses the standard anchor configuration of one tension anchor and one compression anchor.

Lower Bearing Rope Plate

The use of the lower bearing rope is optional. In the case of a hybrid system, it is recommend to use a lower bearing rope that is anchored at spacing of at least equivalent to the post spacing. This will help contain debris at the bottom of the system. In contrast, if the system is being used as an attenuator, the bearing rope can be completely neglected.

Brake Locks

In some cases, it may be desired to limit the activation of brake elements in order to reduce maintenance of following minor events. Both the 1000 and 3000 kJ hybrid systems have been tested with brake locks that prevent the expansion of the brake elements until a per-determined load is applied.

ModelTSC-3000-ZD Hybrid
StyleHinged System
Energy Class6
Maximum Energy Level
Certified/Tested [kJ (ft∙tons)]
3000 / 3060
(1106 / 1128)
Service Energy Level
Certified/Tested [kJ (ft∙tons)]
Approved Heights
[m (ft)]
5.0 - 7.5
(16.4 - 24.6)
VerificationFull Scale Tested
Test Report
Report Number0212/01
Issuing BodyMontanuniversität Leoben
Date of IssueMay 9, 2012
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 ModelAVT-phx 60/30-3.5
Middle Ropes
per fence segment
Rope Diameter
[mm (inch)]
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Element
per rope
Brake Element ModelAVT phx 60/30-4.5
Retaining Ropes
per fence segment
Rope Diameter
[mm (inch)]
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Element
per rope
Brake Element ModelAVT phx 60/30-2.5
Support Structure
Post TypeHEA 300
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 350
(31 x 14)
Base Plate Weight
[kg (lbs)]
per base plate
Post Base Support
Retaining Rope Anchorage
Lateral Anchorage
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 Plate124035site dependent
Typical Cross Section
Typical Layout

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