The document discusses the benefits of using Movable Scaffolding Systems (MSS) for constructing multi-span bridges. MSS were first designed in the 1970s and have since been used successfully on over 100 bridge projects worldwide. MSS are lightweight, easy to assemble, and efficient. They can be adapted to different bridge designs and reused across projects. Self-launching MSS were developed to address challenges in moving supports over water or high piers without a crane. MSS provide faster construction with cycle times up to 50% shorter than traditional methods.

1. The Benefits of Using MSS Systems
for Multi-Span Bridge Construction
Michael Machnik
ASBI Washington DC Nov 2011 1
1

2. 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

3. 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
3
in various major bridge projects in Scandinavia and world wide.

4. 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 4
importantly, efficient in operation.

5. The Movable Scaffolding System - MSS:
The design & flexibility:
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.
5

6. OVERHEAD MSS FOR THE CONSTRUCTION
OF CAST IN-SITU BRIDGES
A quick, reliable and economical solution
for modern bridge construction
6

7. The Movable Scaffolding System - MSS:
Types of MSS
- Overlane MSS ( Standard and Self-Launching)
- Underlane MSS ( Standard and Self-Launching)
7

8. Overlane MSS - Components
FRONT & REAR
NOSES
TENSION
BARS
FORMWORK
TRANSVERSE
TRUSS
MAIN
GIRDER
LAUNCHING
WAGON
PIER 8
SUPPORT

9. OL MSS
9

10. Video Animation
10

11. Underlane MSS -
Components FRONT & REAR
NOSES
.. .. ..
SUPPORTING
BRACKETS
LAUNCHING
WAGON
MAIN
GIRDER
TRANSVERSE
BEAM
EXTERNAL
FORMWORK
INTERNAL
FORMWORK

12. UL SL MSS
12

13. SL UL MSS Animation
13

14. October 7th. 2011
Patent
14

15. 15

16. 16

17. 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.
17

18. 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
18
more manpower are needed.

19. Thank you for your time!
Michael Machnik
For more info visit us at:
www.nrsas.com
19
19