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The Benefits of Using MSS Systems

for Multi-Span Bridge Construction

Michael Machnik

ASBI Washington DC Nov 2011 1

Main Products Applications

MSS - Moving Scaffolding System

Span length 100 – 230 ft (30 – 70m)

Usual Total Length 1640ft (500m) – several km’s

Usual cycle time / span 10 – 12 days ( 164 ft )50m span

The Movable Scaffolding System - MSS:

The MSS was first designed in close co-operation with Norwegian contractors in the 1970's.

The system has since then been developed and successfully used in various major bridge projects in Scandinavia and world wide.

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The Movable Scaffolding System - MSS:

The design of our advanced equipment has been improved and optimized over the years, based on our wealth of experience from over 100 projects.

The system is light weight, easy to assemble, practical in design, supported by hydraulic and cranage systems, and most importantly, efficient in operation.

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The design & flexibility:

The Movable Scaffolding System - MSS:

The MSS can also easily be adapted to any bridge cross section (single box, double box, double T, etc.) and span configuration.

This flexibility provides the contractor the opportunity to re-use the equipment from one project to another.

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OVERHEAD MSS FOR THE CONSTRUCTION OF CAST IN-SITU BRIDGES

A quick, reliable and economical solution for modern bridge construction

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Types of MSS

The Movable Scaffolding System - MSS:

- Overlane MSS ( Standard and Self-Launching)

- Underlane MSS ( Standard and Self-Launching)

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Overlane MSS - Components

FRONT & REAR

NOSES

MAIN

GIRDER

TRANSVERSE

TRUSS

LAUNCHING

WAGON

PIER

SUPPORT

FORMWORK

TENSION

BARS

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OL MSS

Video Animation

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Underlane MSS - Components

SUPPORTING

BRACKETS

..

LAUNCHING

WAGON

MAIN

GIRDER

TRANSVERSE

BEAM

EXTERNAL

FORMWORK

INTERNAL

FORMWORK

FRONT & REAR

NOSES

.. ..

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UL SL MSS

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SL UL MSS Animation

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October 7th. 2011

Patent

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Self-launching MSS

• NRS is the first in the world to develop the Self-

launching MSS (SL-MSS) in order to solve the

problems related to the difficulties in handling

pier support brackets over water as well as on

high piers. This system is able to transfer

forward and mount the pier support brackets

without any need of an independent crane. The

SL-MSS has been successfully used in the

construction of several major bridge projects

worldwide and is widely sought after due to its

cost and operational efficiency.

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Problems, limitation of the existing

equipment in general

• Cycle time is considerable longer. Approximately

50% longer than the new developing MSS.

• Cannot delivery the whole Rebar cage in one

time.

• Need many block-outs in the superstructure.

• Need hanging bars passing through the

superstructure deck to support the formwork.

• Other equipments are needed for relocate the

supports.

• Operation work is considerable complicated and

more manpower are needed.

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For more info visit us at:

www.nrsas.com

Thank you for your time!

Michael Machnik