• Codes
  • Additional Resources
  •   Indian Codes
    Code
    Title of the Code
    Edition
       
    IS 456
    Plain and Reinforced Concrete – Code of Practice
    2000
     
    IS 1566
    Specifications for Hard Rolled Steel Wire for Concrete Reinforcement
    1982
      
    IS 432, Part II
    Specifications for mild steel and medium tensile steel bars and hard rolled steel wires for concrete reinforcement
    1982
    SP 34
    Handbook on Concrete Reinforcement and detailing
    1987
    IS 7887
    Mild steel wire rod for general engineering purpose – Specification
    1992
     
    IS 1599
    Method for bend test
    1985
       
    IS 1786
    Specification for High strength deformed steel bars and wires for concrete reinforcement
    2008
    IS 13920
    Ductile detailing of Reinforced Concrete Structures subjected to Seismic Forces – Code of Practice
    2002
    IS 1716
    Method for Reverse bend Test for Metallic Wire (Second Revision)
    1985

      International Codes
    Code
    Title of the Code
    Edition
       
    MS 145
    Welded Steel Fabric for The Reinforcement of Concrete Specification
    2006
     
    ACI 318

    Building Code Requirements for Structural Concrete (ACI 18-08) and Commentary

    2008
      
    BS 8110
    Part 1 Code of Practice for Design and Construction
    1985
    BS 4482
    Specification for cold reduced mild steel wire for the reinforcement of concrete
    2005
    BS 4483
     
    Specification for welded steel fabric for the reinforcement of concrete .
    2005
     
    NZ-3109
    Concrete Construction
    1997

    Table 1 Shows the total cost (material and labor) for each option. Notice WWR material cost is higher than rebar. Even with higher material costs it is more economical than rebar.

    -- Table 1 --
    Cost Items
    Placement Method
    Traditional Rebar

       WWM D12        Manual            (8 x 18 ft)

    WWM D12   Mechanical    (8 x 40 ft)
    Material      
         Qunatity (t)
    45.7
    44.5
    43.0
         Unit Cost (dollars)
    600.00
    750.00
    750.00
         Total base cost (dollars)
    27,420.00
    33,375.00
    32,250.00
         Total cost including 10% O&P (dollars)
    30,162.00
    36,712.00
    35,475.00
    Labor
         Productivity(man-hours/t)
    18.8
    4.0
    1.4
         Crew
              Foreman
    1 at $22.00
    1 at $22.00
    1 at $22.00
              Skilled labores
    4 at $22.00
    5 at $22.00
    2 at $22.00
              Unskilled labores
    4 at $22.00
    8 at $22.00
    2 at $22.00
              Crew cost (dollars/hr)
    162.00
    242.00
    92.00
         Total Crew time(hrs)
    96
    13
    12
         Total bare installation (dollars)
    15,552.00
    3,146.00
    1,104.00
         Total labor cost including 20% O&P ($)
    18,662.00
    3,775.00
    1,325.00
    Equipment
         Crane (for placement only)
    0
    0
    1
         Cost including operator ($day)
    0.00
    0.00
    1,182.00
         Total euipment cost inlucding 20% O&P ($)
    0.00
    0.00
    2,128.00
    Total work days (work days)
    12.0
    1.5
    1.5
    Total cost ($)
    48,824.00
    40,487.00
    38,928.00
    Cost Savings (%)
    18
    21

    Table 2 Shows the cost comparison for each option adding WWR material waste cost and a higher labor cost. WWR is still more economical with both adjustments.

    -- Table 2 --
    Cost Items
    Placement Method
    Traditional Rebar

       WWM D12       Manual          (8 x 18 ft)

    WWM D12   Mechanical    (8 x 40 ft)
    Material      
         Original total cost including 10% O&P ($)
    30,162.00
    36,712.00
    35,475.00
         5% waste for WWR
    1,836.00
    1,774.00
         Adjusted total cost including 10% O&P ($)
    30,612.00
    38,548.00
    37,249.00
    Labor
         Original average crew cost ($mhr)
    21.60
    21.74
    22.10
         Original total labor cost including 20% O&P ($)
    18,662.00
    3,775.00
    1,325.00
         Adjusted average crew cost ($/mhr)
    36.70
    36.70
    36.70
        Adjusted labor productivity (mhrs/t)
    15.40
         Adjusted total labor cost including 20% O&P ($)
    25,829.00
    6,679.40
    2,202.00
    Equipment
         Total equipment cost including 20% O&P ($)
    2,128.00
    Total cost ($)
         Original total cost ($)
    48,824.00
    40,487.00
    38,928.00
         Total cost with 5% WWR waste ($)
    48,824.00
    42,323.00
    40,702.00
         Total cost with adjusted labor rates ($)
    55,991.00
    43,391.00
    39,805.00
         Total cost with combined effect ($)
    55,991.00
    45,227.40
    41,579.00
    Cost Savings (%)
         Original cost savings ($)
    18%
    21%
         Savings with 5% WWR waste (%)
    13%
    17%
         Savings with adjusted labor rates (%)
    23%
    29%
         Savings with combined effect (%)
    19%
    26%
    1. Because bars are welded in a mat, the bars do not move when concrete is placed, insuring bars are in their proper position.
    2. Since WWR is prefabricated and welded in plants, the risk of missing a bar is minimized.
    3. The chance of improper bending of bars is reduced by using WWR since bending machines bend the mat as a single unit.
    4. The use of WWR minimized the chance of misplacement since only one type of mat is used on a given section.
    5. Provide the exact size of reinforcement where needed through variable bar size and spacing, thereby reduces steel waste.
    6. Any wire size can be used from, starting at W 1.4 up to W 46.5 in increments of 0.1.
    7. No site space needed for steel assembly. View example.
    8. Faster erection time means you can beat changing weather conditions.
    9. Removes reinforcement placement from the critical path.
    10. Less field labor needed.
    11. The material fabrication is automated.
    12. With faster construction, insurance premiums are reduced. For example on bridge deck construction the barrier walls can be constructed faster reducing the time for fall exposure and reducing insurance premium.
    13. WWR can reduce construction time, thereby saving: Crane rental time
    Equipment leasing Increasing bonus
    14. Lower material cost because not fabricating small bar. For example, for a #3 bar the cost is $5/ 100 wt. while a #6 bar is $1.25/ 100 wt.

Technology
All processes have imported machinery with high end technology, PLC based automation,
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Applications
Welded Wire Mesh has a wide range of aplications across several sectors
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Design Capability
A pioneering approach from IJM steel which goes to display the thought leadership of IJM.
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