Multi-Plate™

MULTIPLATE is a construction system based around curved, corrugated, galvanised steel sheets which are bolted together to form durable structures, or part structures, of variable profile that can be deployed in a variety of construction roles.

Multi-Plate™ – Introduction

Typically, ASSET MULTIPLATE structures are used in the following applications:

  • Culverts
  • Re-lining
  • Vehicular underpasses
  • Pedestrian underpasses
  • Livestock underpasses
  • Railway tunnels
  • Materials recovery tunnels
  • Conveyor tunnels
  • Service tunnels

Versatile MULTIPLATE

The versatility of MULTIPLATE in terms of structure shapes and sizes offers the widest possible choice to the designer addressing conventional design problems and also considerable scope for originality when faced with one of the many unusual problems which arise in today’s construction industry. MULTIPLATE is manufactured in a wide range of steel thickness and plate sizes, and the range of applied finishes available includes galvanizing and further optional secondary coatings.

Our technical staff are always ready to discuss the feasibility of applications however unusual they may at first appear. New uses for this versatile product are recorded by users on a regular basis.

Strength through felxibility

MULTIPLATE structures provide a high compressive strength and create a composite steel/soil structure by transferring imposed loads to the surrounding backfill. Structural load capacity is a function of structure span, wall thickness and backfill properties. Foundation loads are considerably reduced compared to those exerted by rigid structures under similar load conditions.

Two corrugation alternatives

MULTIPLATE is available in two corrugation alternatives to meet a wide range of structural design requirements.

MP200 200 x 55 mm corrugation

Steel thicknesses

A range of steel thicknesses from 3.0mm up to 8.0mm is available to satisfy a wide range of MULTIPLATE design requirements.

Multi-Plate™ – Height cover limits

The tables below show height of cover limits in metres for both ASSET MP200 and MP100 structures.

These limits are based upon the UK Highways Agency design method BD 12.

The calculation takes into account the maximum allowable corner bearing pressure of 300Kn/m2 and assumes HA and 45 units of HB loading.

HEIGHT OF COVER TABLE MP200

Steel Thickness (mm)

3.0 mm
(10bits/m)

4.0 mm
(10bits/m)

5.0 mm
(10bits/m)

6.0 mm
(15bits/m)

7.0 mm
(20bits/m)

8.0 mm
(20bits/m)

Diameter/Span (m)

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0

0.65
0.65
0.65
0.7
0.8

11.5
9.0
7.3
6.1
5.1

0.65
0.65
0.65
0.7
0.8
0.9
1.0

15.7
13.3
11.0
9.3
8.0
7.0
6.1

0.65
0.65
0.65
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4

15.7
15.7
15.7
13.5
11.7
10.3
9.2
8.3
7.5
6.8
6.2

0.65
0.65
0.65
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5

15.7
15.7
15.7
15.7
15.7
15.0
13.2
12.2
10.7
9.5
8.3
7.2

0.65
0.65
0.65
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6

15.7
15.7
15.7
15.7
15.7
15.7
15.7
14.3
12.7
11.3
9.9
8.7
7.6

0.65
0.65
0.65
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6

15.7
15.7
15.7
15.7
15.7
15.7
15.7
15.7
14.3
12.6
11.1
9.7
8.5

Multi-Plate™ – Shapes

Note: MULTIPLATE is suitable for lining failing structures by either assembly inside, where working space permits, or hauling in from outside where working space is insufficient.

Grout connections can be supplied for filling the annular space between the new lining and the failing structure. Other shapes can be supplied for special applications.

Multi-Plate™ – Datasheets

Please click on the Multi-Plate™ projects below to download its datasheet PDF .

A30 Honiton to Exeter

A48 Pensarn Carmathen

A130 Bypass Mp200 Underpass

A428 Bedford Southern Bypass

Ardoch South Bridge

Bantry Bay

Derby STW

Hassel Road Flyover

Holybrook Culvert

SUPERSPAN – Datasheets

A1(M) Welwyn – MP200 Superspan arch used to protect a Roman bath-house

B4233 Maerdy, Rhondda – MP200 Superspan arch replaces failing structure

Bishop Middleham Quarry – MP200 Superspan ellipse used as underpass.pdf

Entrance Road, Belfast Harbour – MP200 Superspan arch for twin railtrack crossing

M4 Motorway Swansea – MP200 Superspan arch used to strengthen railway bridge

Wilson’s Bridge, Blarney, Co. Cork – 3 No. Superspan arches used to replace existing bridge

SUPERSPAN – Shapes and Sizes
Structure Shape Size Range Typical Uses
Multiplate pipe Round pipe Diameter 0.6 – 8.0m Culverts, underpasses, service or recovery tunnels
Multiplate low profile pipe arch Low profile pipe arch Span 0.85 – 8.0m Culverts where headroom is limited
Multiplate high profile pipe arch High profile pipe arch (underpass) Span 2.5 – 8.0m Culverts and underpasses beneath embankments for pedestrians, livestock and vehicles
Multiplate ellipse Horizontal ellipse Span 1.0 – 8.0m Culverts, sewers and tunnels where headroom is limited
Multiplate arch Arch Span 1.0 – 8.0m For bridging rock bedded streams. Also for low headroom, large waterway openings and sometimes for aesthetic considerations.

 

Note: MULTIPLATE is suitable for lining failing structures by either assembly inside, where working space permits, or hauling in from outside where working space is insufficient.

Grout connections can be supplied for filling the annular space between the new lining and the failing structure. Other shapes can be supplied for special applications.

Design Manual

We have created our Design Manual to give you all you the information you need to know.

Download our Design Manual