Geobrugg GBE-100A Product Manual

Page 1/41 © Geobrugg Gruppe, CH-8590 Romanshorn, Switzerland GBE-100A / 06

European Technical Assessments ETA 17/0279 ETA 17/0283 ETAG 027: Category A Energy class 0: ≥100 kJ Installation height: 2 – 3.5 m

Rockfall Protection Net / Product – Data Sheet

Federal Office for the Environment FOEN Switzerland

Energy class 0: 100 kJ Installation height: 2 – 4.5 m

Attending testing institute:

Dynamic Test Center Vauffelin / Biel, Switzerland ISO 17025 accredited ISO 9001 certified

Date: 08.10.2018 Edition: 06

CH-8590 Romanshorn

Product Manual

GBE-100A ROCKFALL BARRIER

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FUNCTION AND STRUCTURE OF THE MANUAL

This product manual ensures that Geobrugg rockfall protection systems are manufactured without errors in accordance with the latest technical findings, that their area of application is clearly defined, that their functionality is guaranteed, and that their installation is performed and checked properly.

The product manual is divided into the following parts:

• Proof of quality assurance

• System overview/rope guide

• Staking out

• Assembly details

• ISO 9001 certificate

This document does not claim to be exhaustive. Before starting an installation, it must be ensured that the copy of the product manual is up-to-date. It is designed for general standard applications and does not take into account any project-specific parameters. Geobrugg cannot be held liable for any additional costs which may arise in special cases. If anything is unclear, please contact the manufacturer. Geobrugg AG's general terms and conditions apply.

RESPONSIBILITY FOR THE CONTENT:

Geobrugg AG Protection Systems Aachstrasse 11 PO Box CH-8590 Romanshorn, Switzerland info@geobrugg.com www.geobrugg.com

Romanshorn, 08.10.2018

(Stamp / legally valid signatures)

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I AREA OF APPLICATION

Rockfall protection systems are planned on the basis of detailed research carried out by specialist engineering companies, which take the following geotechnical aspects into account and define the area of application accordingly:

• Previous rockfall events

• Condition of the rockfall outbreak zone

• Assessment of the stability of the entire rockfall zone

• Frequency of rockfalls

• Size of the rocks collected

• Trajectories and displacements of the rocks

• Kinetic energy calculations

• Positioning of the barrier (taking the local topography into account)

• Anchoring conditions

II QUALITY OF THE SYSTEM COMPONENTS

Geobrugg AG, formerly the Geobrugg Schutzsysteme (Geobrugg Protection Systems) department of Fatzer AG, Romanshorn, has been certified according to the quality management system requirements (ISO 9001:2008) under the registration number CH-34372 since August 22nd, 1995. The certification center is the SQS (Swiss Association for Quality and Management Systems), which is a member of IQNet. The quality manual specifies in full the way in which the individual system components (basic material, commercial products, and end products) are checked extensively to eliminate poor quality. You can find the corresponding certificates in the appendix.

III FUNCTIONALITY OF THE BARRIER SYSTEMS

The system functionality is based on rockfall tests that replicate real-life conditions, performed in Walenstadt (SG), Switzerland, in accordance with the European Guideline ETAG 027 “Falling Rock Protection Kits”. In the rockfall tests under real-life conditions, the rocks are thrown vertically into the central field of a three-field barrier with a 10 m distance between the posts of each field. An impact speed of at least 25 m/s is achieved. These investigations are inspected by notified testing centers and obtain European approval, known as ETA (European Technical Assessment), as well as a Swiss inspection certificate from the Federal Office for the Environment (FOEN). The current system GBE-100A has the inspection certificate no. ETA 17/0279, ETA 17/0283 and Rockfall Protection Net / Product – Data Sheet

Certificates

ETA

FOEN

Height [m]

2.0 / 2.5 / 3.0 / 3.5

2.0 / 2.5 / 3.0 / 3.5 / 4.0 / 4.5

IV QUALITY CONTROL FOR INSTALLATION

This product manual describes the planning and installation of barriers in detail.

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V PRODUCT LIABILITY

Rockfall, slipping, landslides, and avalanches occur sporadically and cannot be predicted. Causes range from human activity (building work, etc.) right through to force majeure (weather, earthquakes, etc.). Due to the wide variety of triggers for these events, it is not possible to develop a scientific approach that will guarantee the safety of persons and property.

However, the risk of injury and loss of property can be significantly reduced by applying appropriate engineering calculations using foreseeable parameters and by creating proper protection measures accordingly in specific risk areas.

These systems must be monitored and maintained to ensure the required level of safety. This level of safety can also be diminished through incidents, natural disasters, insufficient dimensioning, failure to use standard components, systems, or original parts, and corrosion (caused by environmental pollution, other human factors, or other external influences).

As a contrast to the rockfall tests under real-life conditions – which test a very tough load but only illustrate a standardized situation – very different barrier arrangements and designs may arise in the field as a result of topography. The impact of these modifications and adjustments cannot always be determined exactly. Critical points include the distance between posts, changes in direction, the installation angles of the rope anchors, the angle of impact, and the speed of impact.

Geobrugg is able to provide assistance when you are assessing the influence of significant anomalies and special situations, and offer suggestions for feasible solutions. However, Geobrugg cannot guarantee consistent performance of the type demonstrated in the rockfall tests under real-life conditions. In critical cases, it is advisable to reinforce individual components against the standard barrier.

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CONTENTS

1 HAZARD NOTES ................................................................................................................ 8

2 TOOLS FOR INSTALLING ROCKFALL BARRIERS ............................................................. 9

3 USING THE WIRE ROPE CLIPS ....................................................................................... 10

4 STAKING-OUT IN ACCORDANCE WITH THE TERRAIN ................................................... 12

5 STAKING-OUT GEOMETRY ............................................................................................. 14

6 INSTALLING THE ROPE ANCHOR ................................................................................... 19

7 ANCHORING THE BASE PLATE ...................................................................................... 20

8 ASSEMBLY DETAILS ....................................................................................................... 24

9 SUPPORT ROPE SEPARATION (SRS) WITH INTERMEDIAT SUSPENSION ..................... 34

10 ADDITIONAL SOLUTION TO THE STANDARD ................................................................. 37

11 FINAL INSPECTION ......................................................................................................... 38

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EXPLANATIONS OF THE SYMBOLS USED

Safety note: Must be followed

Note/reminder that will help you to install the system easily and correctly

Consultation with Geobrugg is recommended

Upslope

Downslope

1 HAZARD NOTES

QUALIFICATION OF THE GROUP LEADER

Only a qualified group leader may be put in charge of the installation.

TENSIONED ROPES

Ropes will be tensioned. When installing and pretensioning ropes, ensure that there are no persons with-

in in the danger area.

RELEASING TENSIONED PARTS

Releasing or separating tensioned parts should be avoided wherever possible. If this is necessary, how-

ever, please exercise the utmost caution.

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2 TOOLS FOR INSTALLING ROCKFALL BARRIERS

STAKING

-OUT WORK

• 30 – 50 m measuring tape

• Folding meter stick

• 5 red and white ranging poles

• Inclinometer

• Spray can

• Wooden peg or iron peg (min. 3x for each field)

• Hammer/mallet

• Manual

INSTALLATION WORK

• Open-ended or ring wrench

• Socket wrench set with ratchet

• Torque wrench, range 25 – 400 Nm (see tightening torque required for wire rope clips and base

plate fastening nuts)

• Open-ended wrench for base plate fastening nuts

• Felco C16 or C112 wire rope cutter or similar; 12 mm cutting capacity

• Motor cutting disc or hammer wire cutter; 28 mm cutting capacity

• Pincers, flat-nose pliers

• 2 mm galvanized wire strands or wire

• Angle spirit level

• Roll of adhesive tape

• Rope clamp, small 8 – 16 mm/large 14 – 26 mm (min. 2x)

• At least 2 tension belts

• Cable winch hoist, e.g. LUG-ALL®

• Chain hoist or HABEGGER wire rope hoist, min. 1.5 t (15 kN)

• Auxiliary ropes

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3 USING THE WIRE ROPE CLIPS

Instructions below apply to all wire rope clips according FF-C-450 type 1 class 1 (similar EN 13411-5 type 2) delivered by Geobrugg AG.

The distance e between the wire rope clips should be at least 1 x t but not exceed 2 x t , where t is the width of the clamping jaws. The loose rope end has to be 3 x e at a minimum. Geobrugg recommends looping up the remaining free section and fixing it directly behind the last wire rope clip on the tightened rope.

If you are using a thimble in the loop structure, the first wire rope clip must be attached directly next to the thimble. For loops without a thimble the length h between the first wire rope clip and the point of load incidence must minimally be 15-time the nominal diameter of the rope. In unloaded condition the length h of the loop should be not less than the double of the loop width h/2.

The clamping brackets (U-brackets) must always be fitted to the unstressed end of the rope, the clamping jaws (saddle) must always be fitted to the strained rope (“never saddle a dead horse”).

During tightening the nuts have to be tensioned equally (alternately) until the required tightening torque is reached.

The required tightening torques with lubrication apply to wire rope clips whose bearing surfaces and the threads of the nuts have been greased with Panolin CL 60 multipurpose lubricant spray (or an equivalent lubricant).

FF-C-450 type 1 class 1

min. 3 x e

h/2

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Wire rope di-

ameter

[mm]

Size of the

wire rope

clip

Required

number of

wire rope

clips

distance

[mm]

Wrench

size

Distance

Required

tightening

torque lubri-

cated

[Nm]

Required

tightening

torque

unlubricated

[Nm]

11 - 12

7/16“

48 - 96

110

5/8“

52 - 104

170

Table 1

Wire ropes must be installed with the required tightening torque.

A visible contusion of the wire ropes positively indicates that the wire rope clips have been tightened to

the required tightening torque.

Wire ropes that have not been damaged can be used again, but the threads and the saddle, in particular,

must be inspected for any damage.

After the first load application the tightening torque has to be checked and if not fulfilled adjusted to the required value.

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4 STAKING-OUT IN ACCORDANCE WITH THE TERRAIN

GENERAL PRINCIPLES FOR STAKING OUT

Position of the barrier

Tried-and-tested simulation programs are available for determining the optimum position of the barrier. Inappropriate locations with excessive displacements or terrain flaws are identified.

Barrier line

It is important to design the barrier line in a way that ensures it is as straight as possible and runs horizontally. Irregular lines as well as depressions and cambers in the terrain between the posts must be avoided or corrected wherever possible.

Position of the foundation

The base plate support of the foundation must be laid against the terrain in such a way that the lower bottom support rope remains close to the ground. The base plate must be positioned in such a way that the bottom support rope bypasses and is not damaged by the edges of the foundation.

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Height differences in the barrier line

h: Structure height x: Post spacing n: Mesh length adjustment

h: Height difference between two neighboring posts



Post spacing

6-8 m

8-10 m

10-12 m

h

< 0.50 m

< 1.00 m

< 1.50 m

No change necessary

h

> 0.50 m

> 1.00 m

> 1.50 m

Mesh must be adapted

Table 2

When the height difference is greater than specified in table 2, contact Geobrugg so that the correct net

length can be determined

h h x x

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5 STAKING-OUT GEOMETRY

GENERAL PRINCIPLES FOR STAKING-OUT GEOMETRY

Standard Staking-Out Measurements

If you comply with the standard staking-out measurements and their tolerances specified on the next few pages, it will be possible to install the barrier without any problems and all components will function properly in the event of an incident.

Adjustments for the terrain

Depending on the terrain, it may not always be possible to comply with the standard staking-out measurements. To ensure that the barrier still functions properly in these cases, you may make several small adjustments to the cross-section or length of nets, ropes, posts, etc.

If you inform Geobrugg of these deviations, we can work together to find a adapted solution quickly.

Orientation of the foundations and base plates

Base plate type 2 can be used on a concrete foundation with two parallel anchors as well as with a 45° inclined tie rod.

In the case of a change in direction, the base plate should be offset in such a way that it is located in the bisecting line of the angle formed by the two directly adjacent net fields (∂,µ,π,Ω).

Orientation of the foundations and base plates F1 – F4 = successive foundations , , ,  = bisecting angle

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The distance of the upslope anchor rope 236

depends on the possible angle  and  must be adjusted and the length of the upslope

anchor rope must be checked.

236





Standard Staking-Out for Straight Barrier Line

Slope angle 30° - 90°

234: Indication of a rope

The view 230 on the stakeout is at a right angle to the terrain.

The following table applies to a terrain slope of 30° – 90° All measurements in m; measurement tolerance ± 0.20 m

Lengths

h a c d e

2.00

3.00

0.65

3.50

1.00

2.50

3.80

0.85

4.30

1.25

3.00

4.50

1.00

5.10

1.50

3.50

5.30

1.15

6.00

1.75

4.00

6.00

1.35

6.80

2.00

Table 3

Slope angle 0° - 29°

230

234

Lengths

h: Barrier height x: Distance between

posts

e: see downslope

anchoring on Page 16

Anchor point

B: Bottom support rope C: Lateral anchor rope D: Upslope anchor rope

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STAKING OUT WITH SUPPORT ROPE SEPARATION WITH INTERMEDIATE SUSPENSION

Lengths Anchor points

x: Distance between posts B1: Bottom support rope section 1 a, c, d: see Table 3 Z1: Intermediate suspension section 1 B2: Bottom support rope section 2

Z2: Intermediate suspension section 2

With simple terrain conditions and suitable tools, we recommend a support rope separation after approximately 60 – 100 m.

In Switzerland, a support rope separation is required after 60 m. In Austria, a support rope separation is recommended after 60 m.

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STAKING OUT WITH AN UPSLOPE CHANGE IN DIRECTION FROM 5° TO 15°

Lengths and angle Anchor point

e: see Table 3 D: Upslope anchor rope x: Distance between posts T: Downslope anchoring y: Angle of change in direction

DOWNSLOPE ANCHORING DUE TO UPSLOPE CHANGE IN DIRECTION LARGER 15°

In case of an upslope change in direction larger than 15° the forces in the downslope anchoring, upslope

anchor ropes, post and base plate increase continuously. For example in case of a change in direction of 35° the forces are 2.3 times higher than for 15°. Consultation with Geobrugg is recommended

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STAKING OUT WITH A CHANGE IN DIRECTION TOWARDS THE DOWNSLOPE BETWEEN 30°

AND 40°

Lengths Anchor points

x: Distance between posts D: Upslope anchor rope d: see Table 3

With a change in direction towards the downslope with an angle of 30° - 40° an additional upslope anchor rope is needed in distance d. The maximum change in direction toward the downslope of 40° must not be exceeded.

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6 INSTALLING THE ROPE ANCHOR

Angle at the post

: The angle between the posts and the perpendicular depends on the terrain slope , see Table 5. : An angle of between 60° and 85° must be maintained between the upslope anchor rope and the post. : The default angle between the terrain and the post is 75°.

The post angle is dependent on the terrain slope, see table 4.

For a slope inclination with  < 30° und  > 45° small adjustments may be made with respect to the

stakeout such as length of the retaining ropes, angle between retaining rope and post inclination of the ground plate, etc.

Depending on the terrain conditions but in any case, if terrain slope angle  > 45° it is recommended to

use bavettes (additional mesh between the terrain and bottom part of the mesh).

The anchor holes are drilled in the pulling direction, with a minimum angle of > 15° to the horizontal.







=75

>15°

>35°

0°-30°

15°

32°

17°

34°

19°

36°

21°

38°

23°

40°

25°

42°

27°

44°

29°

45°

30°

Table 4

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7 ANCHORING THE BASE PLATE

STANDARD BASE PLATE (TYPE 1)

LOOSE GROUND:

• Permitted installation position of the base plate 29: Inclined 0 – 30° to the horizontal

• Drill hole for the main anchor 05

• Prepare the concrete foundation 111; the concrete foundation is di-

mensioned and reinforced in accordance with the information from the project engineer (Geobrugg recommendation: 0.6 x 0.4 x 0.15 m)

• Insert the anchor 05, spacers 09, and fastening nuts 10; the project engineer calculates the lengths of the anchors

• Optional: stabilization tube 04 for vertical anchor

• Important: Spacers and fastening nuts must be fixed on both

sides of the base plate 29

• Mortar the main anchor 05 in the loose ground 110

• Drill and install securing anchor 06 by using the base plate as tem-

plate. Length min. 1.0 m

• Fill in the concrete foundation 111

• Tighten the fastening nuts 10 to

approx. 30 kN pretensioning force

CONCRETE:

• Can be used for all types of soil and rock

• Dig a hole for the concrete foundation 111

• Drill the rear anchoring 07; the project engineer calculates the

lengths of the anchors

• Prepare the concrete foundation 111; the concrete foundation is di- mensioned and reinforced in accordance with the information from the project engineer

• Mortar in the rear anchoring 07 with the fastening nuts 10 and spac- ers 09

• Install both anchors 08 with the help of the base plate 29. Spacers 09 and fastening nuts 10 must be fixed on both sides of the base plate; length of anchor 08 L = 0.5 m

• Fill in the concrete foundation 111

• Tighten the fastening nuts 10 to approx. 30 kN pretensioning force

09,10

111

04,05

09,10

110

0.15 m

0.4 m

0.6 m

29 111

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ROCK:

• Remove rock around the base plate 29 at 0 – 30° to the horizontal

• Drill holes for the anchor 08 that are vertical to the base plate 29 in-

to the rock 112

• Mortar in the anchor 08; the project engineer calculates the lengths of the anchors

• Position the base plate 29

• Tighten the fastening nuts 10 with the spacers 09 to approx. 30 kN

pretensioning force after the mortar has fully hardened

09,10

112

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OPTIONAL BASE PLATE (TYPE 2)

LOOSE GROUND:

• Permitted installation position of the base plate 29: Inclined 0 – 30° to the horizontal

• Drill holes for the anchors (vertical and inclined 45° to the base plate to accommodate inclined anchors)

• Prepare the concrete foundation 111; the concrete foundation 111 is dimensioned and reinforced in accordance with the information from the project engineer (Geobrugg recommendation: 0.6 x 0.4 x 0.15 m)

• Insert the anchor 05, spacers 09, and fastening nuts 10; the project engineer calculates the lengths of the anchors

• Optional: stabilization tube 04 for vertical anchors

• Important: Spacers and fastening nuts must be fixed on both

sides of the base plate 29

• Mortar the anchor 05 in the loose ground 110

• Fill in the concrete foundation 111

• Tighten the fastening nuts 10 to approx. 30 kN pretensioning force

CONCRETE:

• Can be used for all types of soil and rock

• Dig a hole for the concrete foundation 111

• Drill the rear anchoring 07; the project engineer calculates the

lengths of the anchors

• Prepare the concrete foundation 111; the concrete foundation 111 is dimensioned and reinforced in accordance with the information from the project engineer

• Mortar in the rear anchoring 07 with the fastening nuts 10 and spac- ers 09

• Install both anchors 08 with the help of the base plate 29. Spacers 09 and fastening nuts 10 must be fixed on both sides of the base plate; length of anchor 08 L = 500 mm

• Fill in the concrete foundation 111

• Tighten the fastening nuts 10 to approx.

30 kN pretensioning force

09,10

04,05

110

0.15 m

0.5 m

0.6 m

09,10

111

09, 10

09,10

111

ROCK:

• Remove rock around the base plate 29 at 0 – 30° to the horizontal

• Drill holes for the anchor 08 that are vertical to the base plate 29 in-

to the rock 112

• Mortar in the anchor 08; the project engineer calculates the lengths of the anchors

• Position the base plate 29 in the levelling layer of mortar

• Tighten the fastening nuts 10 with the spacers 09 to approx. 30 kN

pretensioning force after the mortar has fully hardened

FURTHER INFORMATION ABOUT ANCHORING

Tightening torque of the fastening nut for an anchor pretensioning force of approx. 30 kN:

Swiss-GEWI NG 20

Swiss-GEWI NG 25

Swiss-GEWI NG 28

Tightening torque

200 Nm

300 Nm

400 Nm

You must use mortar that is resistant to both frost and de-icing salt.

Reinforcement: 12 mm rebar diameter, 150 mm apart

An installation template can be supplied on request. Please ensure the anchors have sufficient contact with the mortar, create a good bond, and that enough

of the surface makes contact with the surrounding material.

You can find more information about anchoring the base plate in the anchor data sheet.

The forces that may occur in the event of a rockfall event must not be underestimated. Civil engineering

and installation work must therefore be carried out by experts.

09, 10

112

09,10

8 ASSEMBLY DETAILS

ERECTING THE POSTS SAFELY

No one should remain in the falling zone of the posts for longer than necessary. The utmost caution must

be exercised in this area until the posts are secured against falling backward, forward, or to one side.

Install the locking screw bar 68 to securely install the posts.

64 2 pcs hex nut M22 65 1 pc washer for M22 68 1 pc locking screw bar 84 1 pc shackle 3/4“

64, 65

BORDER POST AND TOP SUPPORT ROPE

33 2 pcs running wheel 56 1 pc hex bolt M20x110 57 2 pc washer M20 58 1 pc hex nut M20 66 2 pcs upslope anchor rope 67 1 pc later anchor rope 68 1 pc locking screw bar 71 1 pc. top support rope 72 1 pc. bottom support rope 84 5 pcs. shackle 3/4" 87 2 pcs shackle 1“ straight 95 3 pcs wire rope clip 3/4“

other side with rope loop

56, 57, 58

MIDDLE POST

33 2 pc. running wheel 56 1 pc hex bolt M20x110 57 2 pc washer for M20 58 1 pcs hex nut M20 66 2 pcs upslope anchor rope 68 1 pc locking screw bar 71 1 pc top support rope 72 1 pc bottom support rope 84 4 pcs shackle 3/4" 87 2 pcs shackle 1“ straight

56, 57, 58

UPSLOPE ANCHOR ROPE ON THE LATERAL ROPE ANCHORS

UPSLOPE ANCHOR ROPE ON THE MIDDLE ROPE ANCHORS

01 1 pc spiral rope anchor 66 1 pc upslope anchor rope 92 3 pcs wire rope clip 7/16“

01 1 pc spiral rope anchor 66 2 pcs upslope anchor rope 92 3 pcs wire rope clip 7/16“ per rope

66.2

LATERAL ANCHOR ROPES AND THE LOWER SUPPORT ROPE ON THE LATERAL ANCHORS

01 2 pcs spiral rope anchor 67 2 pcs lateral anchor rope 72 1 pc bottom support rope 84 1 pc shackle 3/4“ 95 3 pcs wire rope clipe 5/8“ per rope

TECCO MESH: CONNECTED TO THE VERTICAL PART OF THE TOP SUPPORT ROPE AND

EACH OTHER

205 Flex zones: leave 5 holes (mesh diamonds) free on the left and right of each post (see next

chapter)

The distance between the ground and the upper support rope is 30 cm greater than the structure

height for the posts.

302 - Structure height of 2 m: 1 pc. Helix 2200 x 64/4 - 100

- Structure height of 2.5 m: 1 pc. Helix 3500 x 64/4 - 100, cut to a length of 2800 on site

- Structure height of 3 m: 1 pc. Helix 3500 x 64/4 - 100, cut to a length of 3300 on site

302

205

5 4 3 2 1 1 2 3 4 5 80

206

304.1

304.2

2 3 2

207

FLEX ZONES

Flex zones are formed in the area around the tops and bottoms of the posts to prevent a concentration of forces in these places. In these flex zones, the mesh is not directly attached to the support ropes. Instead, 2 helix springs are wound between the mesh and support ropes.

For a length of 1.75 m or 0.875 m, the helix 3500 x 64/4 - 90 is cut in half or quarters on site.

Flex zones for middle posts

In the area of the 10 diamonds 206, the first helix 304.1 is wound into the upper support rope. The second helix

304.2 is wound into the mesh and the first helix.

207: Two windings of the Helix 304.1 before and after the running wheel are not wounded into the support

rope.

The topmost and the third topmost diamond of the adjacent meshes are also each connected with a 3/8" shackle 80 in addition to the helix.

0,875 m

1,75 m

304.1 / 304.2

304.3 / 304.4

In the area of the 10 diamonds 206, the first helix 304.1 is wound into the upper support rope. The second helix

304.2 is wound into the mesh and the first helix.

207: Two windings of the Helix 304.1 before and after the running wheel are not wounded into the support

rope.

The bottommost and the third bottommost diamonds of the adjacent mesh are also each connected with a 3/8" shackle 80 in addition to the helix. .

206

304.2

207

5 4 3 2 1 1 2 3 4 5 2 2 3 3 304.1

Flex zones on the border

In the area of the 5 diamonds 208, the first helix 304.3 is wound into the upper or lower support rope respectively. The second helix 304.4 is wound into the mesh and the first helix.

The edge of the mesh is wound into the vertical rope with the helix 302. The topmost and the third topmost diamond or the bottommost and third bottommost diamond of the edge of the mesh are connected to a vertical rope with a 3/8" shackle 80 in addition to the helix.

1 2 3 4 5 2 3

208

304.3

304.4

302 6 7 1 2 3 2 3 4 5 304.3

304.4

80 6 7

01 1 pc spiral rope anchor 67 1 pc downslope anchor rope 84 1 pc schackle 3/4“ 95 3 pcs wire rope clip 5/8“

9 SUPPORT ROPE SEPARATION (SRS) WITH INTERMEDIAT SUSPENSION

35 1 pc double clevis 56 1 pc hex bolt M20x110 57 2 pcs washer for M20 58 1 pc hex nut M20 309 1 pc Structural bolt M24x110 66 2 pcs upslope anchor rope 67 2 pcs intermediate suspension 68 1 pc overturn securing rope 71 1 pc top support rope 72 1 pc bottom support rope 84 3 pcs shackle 3/4" 86 4 pcs shackle 1“

56, 57, 58

309

UPSLOPE ANCHOR ROPES ON THE UPSLOPE ANCHORS

01 1 pc spiral rope anchor 66 2 pcs upslope anchor rope 92 3 pcs wire rope clip 7/16“ per rope

66.2

INTERMEDIATE SUSPENSION AND BOTTOM SUPPORT ROPE AT THE SRS ANCHORS

01 2 pcs spiral rope anchor 67 2 pcs intermediate suspension 72 1 pc bottom support rope 84 1 pc shackle 3/4“ 94 3 pcs wire rope clip 5/8“ per rope

10 ADDITIONAL SOLUTION TO THE STANDARD

BRACE ELEMENT SOLUTION

If there is not sufficient space to stake out the lateral anchors using the standard procedure, a strut solu-

tion can be developed in consultation with Geobrugg AG.

ROCK FACE CONNENCTION

If it is not possible to use the standard staking-out procedure, an option for solid rock can be developed in

consultation with Geobrugg AG. This also involves installing towing nets at the edges of the structure.

GAP FILLING SOLUTION

On steep mountain slopes with mountain torrents, there may be larger gaps between the ground and the lower support rope. Individual gap solutions can be developed in consultation with Geobrugg AG

11 FINAL INSPECTION

Once installation has been completed, the following aspects in particular must be inspected:

a) Are the support ropes and the lateral rope connected to the correct anchors?

b) Are the rope guides at the top and bottom of the posts installed correctly?

c) Have the correct number of loops been left free on the left and right of the posts?

d) Is the net correctly fastened to the support ropes?

e) Have the correct number of wire rope clips been attached to the ends of the rope?

f) Are the wire rope clips installed correctly?

g) Has the correct torque been applied to the wire rope clips?

h) Are the nets connected correctly?

i) Are the end nets correctly fastened to the vertical ropes?

j) Is the sag of the top support rope less than 3% of the distance between the posts?

Geobrugg GBE-100A Product Manual

Specifications and Main Features

Frequently Asked Questions

User Manual