TS-DC Gully Net

Area of Application
The TS-DC Gully Net is a debris flow barrier designed for sites with confined flows such as in gullies or debris torrents. Unlike prefabricated systems used for rockfall mitigation, debris flow barriers must always be designed on a site-to-site basis to account for the highly variable characteristics of debris flow processes and their interaction with site topography.

Lateral Anchorage
Anchors for the bearing and middle ropes are installed directly into the steep sides of the gully. Either bar anchors or cable anchors can be used. In the case of very poor anchoring conditions, artificial embankments may be constructed to help limit erosion and scouring.

Double Rope System
A double rope system is used to ensure the net remains as close to the edge embankments as possible while allowing the brake elements to expand. In this case, a brake element is fitted to opposing sides of the ropes. The side with the brake element, is not threaded through the leading net panel.

Overflow Abrasion Protection
For systems where overflow is anticipated and abrasion is an issue, steel profiles can be added to help protect the upper bearing rope set. The plates cover both the ropes and the upper edge of the net and are installed during the final stages of construction.

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.Classification
Model | TS-DC Gully Net |
Style | Lateral Anchored |
Impact Pressure [kN/m2(lbf/ft2)] | up to 150 (3133) |
Available Heights [m (ft)] | up to 7.5 (24.6) |
Verification | Analytical (site-to-site) |
Primary Net
Model | Omega-Net 7.5/135 | Omega-Net 9.0/185 | Omega-Net 10.5/180 |
Type | Steel Wire Cable | Steel Wire Cable | Steel Wire Cable |
Rope Diameter [mm (inch)] | 7.5 (0.30) | 9.0 (0.35) | 10.5 (0.41) |
Rope Construction | 1 x 7 Spiral | 1 x 7 Spiral | 1 x 19 Spiral |
Single Wire Diameter [mm (inch)] | 2.5 (0.10) | 3.0 (0.12) | 2.1 (0.083) |
Corrosion Protection | Zn/ZnAl (Class A) | Zn/ZnAl (Class A) | ZnAl (Class A) |
Mesh Size [mm (inch)] | 135 x 135 (5.3 x 5.3) | 185 x 185 (7.3 x 7.3) | 180 x 180 (7.1 x 7.1) |
Unit Weight [kg/m2(lb/ft2)] | 5.6 (1.15) | 6.8 (1.39) | 10.5 (2.15) |
Mesh Tensile Strength calculated [kN/m (lbf/ft)] | 386 (26,449) | 465 (31,862) | 756 (51,802) |
Connection to Main Ropes | Threaded | Threaded | Threaded |
Connection to Adjacent Panel | 3/8" Shackle | 7/16" Shackle | 1/2" Shackle |

Omega-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 segment | 4 (two upper, two lower) |
Max. Rope Diameter [mm (inch)] | 24 (0.945) |
Corrosion Protection | Zn or ZnAl (Class A or B) |
Brake Element per rope | 1 |
Brake Element Type | AVT-phx |
Middle Ropes
Quantity per fence segment | site dependent (sets of two) |
Max. Rope Diameter [mm (inch)] | 24 (0.945) |
Corrosion Protection | Zn or ZnAl (Class A or B) |
Brake Element per rope | 1 |
Brake Element Type | AVT-phx |
Lateral Anchorage

Seam Connection

Typical Layout

NOTE: All data is taken from an example of an existing project. Every debris flow structure is custom designed for a specific site and loading conditions and so the exact details of the system will very from site to site. This is an important aspect of debris flow mitigation since standardized (e.g. CE marked systems) cannot address site specific requirements.