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Reinforcing Bar

Hot Rolled, High Strength Deformed Bars of Grade D500N

Both quench and self tempered and micro-alloy reinforcing bars are classified as Grade D500N and no distinction is made between them for supply purposes. Each steel-maker identifies their rolling mill with its individual surface mark.

Bar Size Nominal Area Calculated Area Calculated Mass

mm

mm2

mm2

kg/m
N12 110 133.1 0.8878
N16 200 201.1 1.5783
N20 310 314.2 2.4662
N24 450 452.4 3.5513
N28 620 615.8 4.8837
N32 800 804.2 6.3133
N36 1020 1017.9 7.9903
N40 1260 1256.6 9.8646
D450N50 1960 1963.5 15.4131

Notes:

    1. The calculated area of a deformed bar is calculated from the bar size, in mm, as if it was a circle.
    2. The nominal area of a deformed bar is the calculated area, rounded to two significant places, and should be used in all design calculations and for routine testing for quality control.
    3. The calculated mass is the calculated area multiplied by 0.0078 kg/ mm2/m (7850kg/m3) taken to four decimal places to assure accuracy for quantities measured by length but sold by the tonne. The actual area of a test bar (measured mass of a sample 0.00785) should be used only for fundamental research.
    4. The nominal mass includes the rolling margin, based on the calculated mass, and is used for calculating the mass of material sold in all commercial transactions.

Cold Rolled, High Strength Deformed Bars of Grade D500L

Cold rolled bars are typically Ductility Class L. D500L bars are used as fitments and in residential slabs on ground.

Bar Size Diameter Area Mass

mm

mm

 mm2

kg/m
L4 4.00 12.6 0.0986
L5 4.75 17.7 0.1391
L6 6.00 28.3 0.2220
L7 6.75 35.8 0.2809
L8 7.60 45.4 0.3561
L9 8.55 57.4 0.4507
L10 9.50 70.9 0.5564
L11 10.65 89.1 0.6993
L12 11.90 111.2 0.8731

 

Bar Size Nominal Area Calculated Area Calculated Mass

mm

mm2

mm2

kg/m
R6.5 30 33.2 0.2605
R10 80 78.5 0.6165

Notes:

  1.  
    1. Availability of these sizes can depend on local practice throughout Australia. They are produced from coiled rod of grade 250 MPa, or from coiled wire of grade 500 MPa. Specify your required strength.
    2. All values given in the above table are for 6.5 mm and 10 mm coiled rods.
    3. Plain round bars for dowel bars are available in larger sizes to AS3679, Grade 250. These sizes are: R12, R16, R20, R24, R27, R33 and R36, but the full range may not be available from stock at all times.

Table: Design cross-sectional area of deformed bars

Table: Design cross-sectional area of deformed bars per metre width

Reinforcing Bar Processing

Bar Tension Lap and Anchorage

Bar Compression Lap Length and Anchorage

Additional Information on Lap Splices

Bar Hooks and Cogs

Rust and Protective Coatings