CONSTRUCTION METHODS FOR M-BEAM BRIDGES
PSEUDO BOX
 

Construction sequence

  1. M-beams are launched at 1-metre centers.
  2. Fill gap between bottom flanges of adjacent beams
  3. Place reinforcement through web holes & cover reinforcement with a minimum of 50mm in situ concrete.
  4. Place permanent formwork between top flanges of adjacent beams
  5. Place reinforcement for top slab and end diaphragm beams
  6. Cast top slab and end diaphragm beams
 
T-BEAM
 

Construction sequence

  1. M-beams are launched at 1-metre centers
  2. Place permanent formwork between top flanges of adjacent beams
  3. Place reinforcement for top slab and end diaphragm beams
  4. Cast top slab and end diaphragm beams.
 
CONSTRUCTION METHODS FOR INVERTED T-BEAM BRIDGES
GRILLAGE
 

Construction sequence

  1. Inverted T-beams are laid at 508mm centers
  2. Fill gap between bottom flanges of adjacent beams at position of diaphragm beams
  3. Place diaphragm reinforcement through web holes @ 1.525mm centers together with shear reinforcement
  4. Place formwork to sides of diaphragm beams and top flanges of adjacent beams
  5. Place reinforcement for top slab
  6. Cast top slab and diaphragm beams

 

 
SOLID SLAB

Construction sequence

  1. Inverted T-beams are laid at 508mm centers
  2. Fill gap between bottom flanges of adjacent beam length of beams
  3. Place reinforcement through web holes @ 762mm centers
  4. Place reinforcement for top slab
  5. Cast void between contiguous beams together slab.

 

 
CONSTRUCTION METHODS FOR I-BEAM BRIDGES
 

Construction sequence

  1. I-beams are launched at 1.5 metre centers (typical)
  2. Side formwork for diaphragm beams and soffit formwork slab is placed
  3. Reinforcement for diaphragm beams is placed.
  4. Place reinforcement for top slab.
  5. Cast top slab and diaphragm beams.
 
Note: For T-beam construction, web holes are omitted, except at the ends of the M-beam for threading through the end diaphragm beam reinforcement.
 
Prestressed Concrete Beam | Page 1 | Page 2 | Page 3 | Page 4 | Page 5
 
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