Michael Machnik ASBI 2011 Movable Scaffolding System presentation
The Benefits of Using MSS Systems for Multi-Span Bridge Construction Michael Machnik ASBI Washington DC Nov 2011 11
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 withNorwegian contractors in the 1970s.The system has since then been developed and successfully used 3in various major bridge projects in Scandinavia and world wide.
The Movable Scaffolding System - MSS:The design of our advanced equipment has been improved andoptimized over the years, based on our wealth of experiencefrom over 100 projects.The system is light weight, easy to assemble, practical in design,supported by hydraulic and cranage systems, and most 4importantly, efficient in operation.
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-usethe equipment from one project to another. 5
OVERHEAD MSS FOR THE CONSTRUCTIONOF CAST IN-SITU BRIDGESA quick, reliable and economical solutionfor modern bridge construction 6
The Movable Scaffolding System - MSS:Types of MSS - Overlane MSS ( Standard and Self-Launching) - Underlane MSS ( Standard and Self-Launching) 7
Overlane MSS - Components FRONT & REAR NOSES TENSION BARS FORMWORK TRANSVERSE TRUSS MAIN GIRDER LAUNCHING WAGON PIER 8 SUPPORT
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
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.
Thank you for your time! Michael Machnik For more info visit us at: www.nrsas.com 1919