Area of Application

Requiring anchoring of the foundation posts only, the barrier can be placed excellently on top of wall decks, tunnel portals or retention dams. A rockfall strike will be dissipated by the elongation of the ISOSTOP Flexnet and the calculated plastic deformation of the lateral HEA 140 posts. Due to an inflexible guidance of the lower bearing rope, the barrier shows minimized bottom openings, even if it is placed along construction edges or on slope crests. Long work lines can be realized transition free and without overlapping by using the standard barrier. No additional constructional efforts are required.

End Post

The 100 E DIM system is completely free of lateral and retaining anchors, only having anchorage for the base plates of the posts. During an event, the energy dissipation occurs through the plastic deformation of the HEA 140 end posts. In this way, seamless fence lines can be created without any design effort.

Internal Post

Posts from this ISOSTOP system are built from RHP profiles that provide high torsional rigidity and extremely low weight. The detachable steps are installed after transport and enable the highest level of work safety.

Rope Guidance

The bearing ropes are guided by shackles along the supporting posts. This connection allows a very fast installation and a simple replacement of any of the components.

Base Plate

The barrier is designed to be placed on wall decks, concrete foundations, or other constructive structures. For mounting the base plate to the construction part, four INOX thread bars or four GEWI bars are used.
StyleFixed Rotation
Energy Class0
Maximum Energy Level Certified/Tested [kJ]100 / 103
(37 / 38)
Service Energy Level Certified/Tested [kJ]n/a
Approved Heights - ETA [m (ft)]2.0 - 2.5
(6.5 - 8.2)
VerificationFull Scale Tested
Certification - ETAETAG27 / EAD 340059-00-0106 certified
Test Report Summary
Test Height [m (ft)]2.0
Maximum Elongation [m (ft)]2.64
Residual Height ClassA (≥50%)
Component FailureNone
Primary Net Opening [m (ft)]None
Secondary Mesh50/50/2.5
European Technical Assessment ETA
ETA NumberETA-22/0814
Issuing BodyTSUS Building Testing and Research Institute
Date of IssueJanuary 17, 2023
Certificate of Conformity
Report Number1301-CPR-2129
Issuing BodyTSUS Building Testing and Research Institute
Date of IssueMarch 3, 2023
Primary Net
ModelFlexnet MW 250
TypeSteel Wire Cable with Clamps
Rope Diameter [mm (inch)]8.0
Rope Construction6 x 7 SC
Corrosion ProtectionZn or ZnAl (Class A or B)
Mesh Size [mm (inch)]250 x 250
(9.84 x 9.84)
Unit Weight [kg/m2 (lb/ft2)]3.04
Mesh Tensile Strength calculated [kN/m (lbf/ft)] n/a
Connection to Main RopesThreaded
Connection to Adjacent Panel3/8" Shackle

The foldable FLEXNET can be pre-assembled on the posts. The net is extremely robust and elastic thanks to the structure of individual wire rope strands. After an event, the flexible wire rope ensures that it returns to its original geometry and thus significantly reduces maintenance costs.

Bearing Ropes
Quantity per fence segment2
Rope Diameter [mm (inch)]16
Corrosion ProtectionZn or ZnAl (Class A or B)
Brake Elements per rope0
Brake Element Model-
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 140A (end)
RHS 160/80/4 (middle)
Integrated Laddern/a
Rope GuidesShackle
Post Weight as tested [kg (lbs)]55/55
Base Plate ConnectionFixed
Base Plate Foot Print [mm (in.)]507 x 500
(20 x 20)
Base Plate Weight [kg (lbs)]n/a
Anchors per base plate4
Post Base Support
1.Post; 2.Rope Guide; 3.Base Plate; 4.Anchor Nut; 5.Washer; 6.Anchor; 7.Foundation
Base Plate Anchor Layout
Anchor Forces
Lateral Anchor Fk,lat [kN (kips)] -
Slope Parallel Force H at base plate [kN (kips)] 55
Tension Force per tension anchor at base plate, Fk,ten [kN (kips)] 284
Bending Moment at foot of post as tested, MFOK [kNm (ton-ft)] 114
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 Plate242522n/a
Typical Cross Section
1.Post; 2.Rope Guide; 3.Base Plate; 4.Flexnet MW 250; 5.Anchor; 6.Foundation
Typical Layout
1.Post; 2.Upper Bearing Rope; 3.Lower Bearing Rope;