Applications
Bridge crossing over highways, railways or rivers for pedestrian, motorcycles and services.
 

Features
  • Functional deck integrated with main structural element to form strong and rigid box girder
  • Off steel form smooth finish
  • Long span capacity from 15m to 29m
  • Length customised to project requirement
 
 
Advantages
  • Fast, safe and neat construction
  • Minimum interruption to traffic
  • Eliminate messy insitu work
  • cost compared to conventional solutions
  • Lighter selfweight by 40%, compared to conventional solution
  • Very stable during handling and erection stages
  • Factory produced to stringent standards
  • High grade concrete and high durability
  • Robust section with high torsional rigidity
  • Optional aesthetic finishes can be incorporated onto the webs
  • Services can be concealed inside the box
 
Design Considerations
  •  Reinforced concrete design in accordance with BS 5400: Part 4: 1990
  • Concrete characteristic strength
    fci = 40MPa at transfer
    fcu = 50MPa at  28 days
  • Concrete cover to reinforcement  = 30mm
  • Loading:
    ~ Live loads = 5kN/m�
    ~ Superimposed dead load = 2kN/m�
  • Prestressed class I structure
 

Comparison with Conventional Solution

Conventional Solution � Pre-tensioned Beams
Method
  1. Insitu foundation / supporting piers and accessories
  2. Install pre-stressed beams
  3. Install formworks and reinforcement for facial beam and deck
  4. Concreting, curing etc
  5. Dismantle formwork
  6. Finishing work � railing, tiles etc
Problem
  1. Messy sitework � special safety requirements needed owing to ongoing traffic below crossing
  2. Slow progress - weather dependent
  3. Uneconomical design - 2-stage composite & heavy
  4. Inconsistent quality of casts insitu works
 
Conventional Solution � Post-tensioned Beams
Method
  1. Insitu foundation / supporting piers and accessories
  2. Install post-tensioned beams
  3. Finishing work - railing, tiles etc
Problem
  1. Sitework on casting and post-tensioning � space, stressing etc
  2. Slow progress - weather dependent
  3. Uneconomical design � heavy section, expensive cranage etc
  4. Requirement of site control
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HUME CONCRETE MARKETING SDN BHD (8411-T)
Level 2, Bangunan Pan Global,
No. 1A, Jalan Tandang,
P.O.Box 21, 46700
Petaling Jaya, Selangor.
Hot-line: (603) 7785 5282
Tel: (603) 7783 3068
Fax: (603) 7785 1823
E-mail: Adam Hussein (HIMB-PJ)