Cau tao MSS

Steel Design and
Steel Design and
Construction Engineering
Construction Engineering
For the kind Attention of :
For the kind Attention of :
Ministry of Transportation of Vietnam
Ministry of Transportation of Vietnam
MOVABLE SCAFFOLDING SYSTEM-MSS
MOVABLE SCAFFOLDING SYSTEM-MSS


EXCLUSIVE DISTRIBUTOR IN VIET NAM:
EXCLUSIVE DISTRIBUTOR IN VIET NAM:
EID ENGINEERING COMPANY
EID ENGINEERING COMPANY
Head Office : Block 505, 5th Floor - Tranco Building - Hoan Kiem Ha noi Viet Nam
Head Office : Block 505, 5th Floor - Tranco Building - Hoan Kiem Ha noi Viet Nam
Telephone : 04 9422176 / 9423265/ 0913248854 - Fax : 04 9422175 - Email :
Telephone : 04 9422176 / 9423265/ 0913248854 - Fax : 04 9422175 - Email :

MSS IN BRIDGE CONSTRUCTION

OVERVIEW OF MSS
–
AUTOMATIZED CONSTRUCTION METHOD COMBINING A
SUPPORT SYSTEM AND FORMWORK
–
SUITABLE CONDITIONS FOR USING MSS
•

CONTINUOUS GIRDER SYSTEM
•
SIMPLE SUPPORTED SYSTEM
–
SINGLE AND MULTIPLE CELLED BOX GIRDERS
–
DOUBLE T GIRDERS
–
PLATE GIRDERS

TYPE OF MSS
•
UNDER LANE SYSTEM
•
OVER LANE SYSTEM
–
SINGLE SPAN MSS (MSS)
–
DOUBLE SPAN MSS (DMSS)
–
TRIPLE SPAN MSS (TMSS)

UNDERSLUNG MSS
A) INTERNAL FORMWORK
B) EXTERNAL FORMWORK
C) MAIN GIRDER
D) LAUNCHING WAGON
E) PIER BRACKET
F) TRANSVERSE BEAM
G) SUSPENSION GALLOWS

OVERHEAD MSS
A) MAIN GIRDER
B) FRONT PIER SUPPORT
C) TRANSVERSE GIRDER
D) FORMWORK
E) LAUNCHING WAGON

DOUBLE T OVERHEAD MSS

DOUBLE T UNDERSLUNG MSS

SINGLE BOX UNDERSLUNG MSS

DOUBLE BOX UNDERSLUNG MSS

SINGLE BOX UNDERSLUNG MSS

DOUBLE BOX OVERHEAD MSS

DOUBLE BOX OVERHEAD MSS

MSS DESIGN CRITERIA
–
Basic data required for MSS design
–
Max. distance between bridge piers 70 M
–
Min. radius of curvature > 260 M
–

Unit weight of superstructure 21.4 Ton/M
–
Max. longitudinal slope 5.0 %
–
Max. transverse slope + /- 5.0 %
–
Max. deflection 1/400

–
9 main parts of MSS
•
MAIN GIRDE
•
NOSE
•
SUPPORTING BRACKET
•
TRANSVERSE BEAMS
•
EXTERNAL FORMWORK
•
INTERNAL FORMWORK
•
LAUNCHING WAGON
•
PLATFORM & LADDERS
•
SUSPENSION GALLOW (not in simple supported bridges)
–
Accessory equipment Rebar cage

prefabrication trolley
DESCRIPTION OF MSS COMPONENTS

Main Girder Underslung MSS﹝ ﹞

Main Girder Underslung MSS﹝ ﹞

Main Girder, Nose Overhead MSS﹝ ﹞

–
Nine main parts of MSS
•
MAIN GIRDER
•
NOSE
•
SUPPORTING BRACKET
•
TRANSVERSE BEAMS
•
EXTERNAL FORMWORK
•
INTERNAL FORMWORK
•
LAUNCHING WAGON
•
PLATFORM & LADDERS
•
SUSPENSION GALLOW
–

Accessory equipment rebar cage
prefabrication trolley

NOSE

NOSE

NOSE

NOSE

Nose rear﹝ ﹞

Nose and work platform