Double Twist Mesh:Overview of Products & Solutions

Date October 2016Autore Paolo Di Pietro, Corporate DT Specialist

INTRODUCTION

Purpose:

Introduce Maccaferri Double Twist Steel Wire Mesh

Provide an overview on our products with related solutions

WIRE AND DOUBLE TWIST MESH

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THE WIRE AND THE DOUBLE TWIST STEEL WIRE MESH

• The ‘double twist’ connection locks the wires together: it is more flexible, stronger and

has greater punch resistance.

• International standards compliant (EN, ASTM, SANS, NBR, etc)

• Third-party certified (CE Marked, BBA Certified, etc)

Mild Steel Wire

Galvanization

(ZnAl alloy Coating)

Polymer

Protective Coating

PRODUCTS

1. DOUBLE TWIST MESH IN ROLLS

2. GABIONS

3. JUMBO GABIONS

4. SACK GABIONS

5. RENO MATTRESSES®

6. TERRAMESH® AND GREEN TERRAMESH®

7. ROAD MESH®

8. REINFORCED GEOMAT - MACMAT® R

MACCAFERRI DOUBLE TWIST STEEL WIRE MESH PRODUCTS

Double Twist Mesh In Rolls

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1. DOUBLE TWIST MESH IN ROLLS

Steel woven wire mesh is used as a drapery system for rockfall protection

to prevent rocks and debris from falling onto roads, railways and buildings.

Steelgrid HR is a high strength version of the mesh, reinforced with high-tensile

steel wire ropes interwoven with the mesh during manufacture.

Double Twist Mesh Roll Steelgrid HR version

Sizes for Rockfall protection netting

Length (m) Width (m)

25 2 - 3 - 4

50 2 - 3 - 4

100 2 - 3 - 4

All sizes and dimensions are nominal.

Tolerances of -0 +1% of the length and ± M of the height shall be permitted.

Gabions

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2. GABIONS

Gabions are steel wire mesh containers uniformly partitioned into internal

cells, interconnected with other units, and filled with stone at the project site

to form flexible, permeable, monolithic structures such as retaining walls, sea

walls, channel linings, revetments, and weirs for erosion control projects.

Sizes of Gabions

Length (m) Width (m) Height (m) # of cells

2 1 0.5 2

3 1 0.5 3

4 1 0.5 4

1.5 1 1 1

2 1 1 2

3 1 1 3

4 1 1 4

All sizes and dimensions are nominal. Tolerances of a ±5% shall be permitted.

Standard mesh-wire

Type M (mm) Tolerance (mm)Wire diameter

(mm)

Mesh Tensile

Strength (kN/m)

Punch Strength

(kN)

8x10 80 -0/+10 2.70 / 3.70 50 67

Jumbo Gabions

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3. JUMBO GABIONS

Jumbo Gabions are larger version of our regular gabions: steel wire

mesh containers uniformly partitioned into internal cells, with a greater

width than regular gabions, and a separate lid, interconnected with

other units, and filled with stone at the project site to form flexible,

permeable and monolithic structures. Their larger dimensions enable

faster project installation of larger retaining walls, sea walls, channel

linings, and revetments.

Sizes of Gabions

Length (m) Width (m) Height (m) # of diaphragms

3 2 0.5 2

4 2 0.5 3

5 2 0.5 4

6 2 0.5 5

3 2 1 2

4 2 1 3

All sizes and dimensions are nominal. Tolerances of a ±5% shall be permitted.

Sack Gabions

4. SACK GABIONS

Sack gabions are cylindrical baskets made of steel wire mesh used

for retaining structures, river works, erosion control.

Sack gabions are filled with stones at the project site and then lifted

into place to form flexible and permeable structures. They are often

used in emergency erosion control and repair works as they are rapid

to install and deploy.

Sizes for Sack Gabions

Length (m) Diameter (m) Volume (m3)

2 0.95 1.41

All sizes and dimensions are nominal. Tolerances of a ±5% shall be permitted.

Reno Mattresses®

5. RENO MATTRESSES®

Reno Mattresses are rectangular units made of steel wire mesh

uniformly partitioned in internal cells, which are filled with stones at the

project site to form flexible, permeable, monolithic structures such as

river bank protection and channel linings for erosion control projects.

Sizes of Gabions

Length (m) Width (m) Height (m)

3 3 0.17 – 0.23 – 0.30

4 3 0.17 – 0.23 – 0.30

5 3 0.17 – 0.23 – 0.30

6 3 0.17 – 0.23 – 0.30

All sizes and dimensions are nominal. Tolerances of a ±5% shall be permitted.

Terramesh® System

6. TERRAMESH® SYSTEM

Terramesh System is a modular system used for soil reinforcement

made of pre-assembled units fabricated with double twisted wire

mesh 8x10 made of Galmac (Zn-Al5% alloy) and polymer coated

steel wire.

The facing element of the unit is formed by connecting the back

panel and the 2 diaphragms to the main soil reinforcement unit,

thereby creating the rectangular shaped cells used for containing the

stone fill.

Sizes of Terramesh® System

Length (m) Width (m) Height (m)

3 3 1.0/0.8

4 3 1.0/0.8

5 3 1.0/0.8

6 3 1.0/0.8

All sizes and dimensions are nominal. Tolerances of a ±5% shall be permitted.

Green Terramesh®

6. GREEN TERRAMESH®

Green Terramesh is an environmentally friendly modular system

used for soil reinforcement. It is designed to revegetate once installed

to create a green faced reinforced soil slope.

The Green Terramesh main unit is fabricated from Galmac (Zn-Al5%

alloy) and polymer coated steel wire.

Sizes for Green Terramesh®

Length (m)

Width (m)

Height

(m) / (slope

angle °)Green

Terramesh

Green

Terramesh Light

3.0 3.0

3

0.76 / (70°)

0.73 / (65°)

0.70 / (60°)

0.58 / 45°)

4.0 4.0

5.0 5.0

6.0 6.0

7.0 -

8.0 -

All sizes and dimensions are nominal. Tolerances of a ±5% shall be permitted.

Road Mesh®

7. ROAD MESH®

Road Mesh® is a unique bi-directional heavy duty reinforcement used in the

bound layers of pavement structures. Its 3-dimensional structure enables the

bound layer materials to interlock with the mesh, and therefore optimum and

immediate load transfer from the aggregate to the reinforcement occurs.

Road Mesh® is typically used for road maintenance and new road

construction, where conditions are less favorable, and where traditional

remedial or design solutions are no longer viable. Road Mesh® absorbs and

ultimately reduces the peak tensile stresses caused by the presence of

reflected cracks and/or traffic.

Table of sizes for Road Mesh®

Length (m) Width (m)

25 - 50 2 - 3 - 4

All sizes and dimensions are nominal.

Tolerances of -0 +1% of the length and ±D of width shall be permitted.

MacMat® R

8. REINFORCED GEOMAT - MACMAT® R

MacMat® R is a reinforced geomat made from a three-dimensional polymer

matrix extruded onto a double twisted steel wire woven mesh.

The reinforcing hexagonal steel wire mesh has mechanical characteristics

exceeding those in EN 10223-3.

The wire is protected with GalMac® Zn-AI5% galvanising in accordance with EN

10244-2, Class A. The galvanised wire is also available with an extruded polymer

coating for additional protection.

Table of sizes for MacMat® R

Mesh 6x8 Type 8x10 Type

Wire diameter (mm)

(core / with polymer)2.2 / 3.2 2.7 / 3.7

Roll dims. (m)

Length x Width25 x 2 25 x 2

MacMat® R Roll

SOLUTIONS

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SOLUTIONS AND PRODUCTS

Solutions

Gabions, Sack Gabions

and Jumbo Gabions

Reno Mattresses Terramesh / Green Terramesh Road Mesh Mesh MacMat R

Gravity Retaining Walls

& Soil Reinforcement P P

Hydraulic Works P P P P P

Erosion Control P P P P

Rockfall Protection P P P

Flexible pavements P

Coastal Protection P P P P

Landfills P P P P P

Landscape &

Architecture P P P P

Thank You.

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All dimensions and specifications subject to change without notice.

Please consult your local Maccaferri website for the latest technical specifications.