About
osr
OneSteel Reinforcing - Reinventing Reinforcing
Design Aid
Steel Reinforcement Area Calculator
This calculator has been updated to AS/NZS 4671:2001 Steel reinforcing materials.
The purpose of this calculator is to determine the nominal areas of main reinforcing bars and welded wire mesh produced
by OneSteel Reinforcing.
In accordance with AS 4671, Steel Reinforcing Materials, the cross-sectional area of ribbed bars is taken as the
calculated area of the circle having the same diameter as the bar size to three significant figures. Standard N bar sizes
are 10, 12, 16, 20, 24, 28, 32, 36 and 40 mm. When determining bar spacing, it is assumed that bars will not be placed at
closer centres than db + 30 mm, where db is the bar size, nor at further than 350 mm.
Standard rectangular and square meshes (RL and SL) are available. Trench mesh (LTM) is also produced.
For Technical Enquiries contact:
Graeme McGregor
Manager Technical Development
33 Shaddock Avenue, Villawood
Page 1
About
re mesh produced
dard N bar sizes
ill not be placed at
Page 2
General
osr
Bar or Mesh Details
Option 1: INPUT MESH SIZE
SX ONEMESH®
Select Mesh SL102 7
Longitudinal Wires
Bar Y SY db = 9.5 mm
SY = 200 mm
Bar X AstX = 354 mm2/m
AstX = 374 mm2/m (sheet edges lapped)
Cross Wires
Y db = 9.5 mm
SX = 200 mm
AstX = 354 mm2/m
2
Mass = 5.6 kg/m
X
Option 2: INPUT BAR DIAMETER & SPACING
X-DIRECTION Y-DIRECTION TOTAL
INPUT db = 16 mm db = 20 mm
SY = 200 mm SX = 200 mm
2 2
OUTPUT AstX = 1000 mm /m AstY = 1550 mm /m
2 2
Mass = 7.9 kg/m Mass = 12.3 kg/m Mass = 20.2
Option 3: INPUT BAR DIAMETER & REQUIRED AREA
X-DIRECTION Y-DIRECTION TOTAL
INPUT db = 24 mm db = 16 mm
2 2
AstX = 3000 mm /m AstY = 900 mm /m
OUTPUT SY = 150 mm SX = 222 mm
2 2
Mass = 23.6 kg/m Mass = 7.1 kg/m Mass = 30.6
Page 3
General
Page 4
General
Page 5
General
Page 6
General
SL102
mm2/m (sheet edges lapped)
16
20
2
kg/m
24
16
2
kg/m
Page 7
General
Page 8
General
Page 9
General
Page 10
REOMESH Table
osr OneSteel Reinforcing - Ribbed REOMESH®
Product Longitudinal Wires Cross Wires Sheet mass
Code size spacing area area lapped size spacing area
mm mm mm2/m mm2/m mm mm mm2/m kg/m2
RL1218 11.90 100 1112 1222 7.60 200 227 10.5
RL1118 10.70 100 899 988 7.60 200 227 8.8
RL1018 9.50 100 709 779 7.60 200 227 7.3
RL918 8.60 100 581 638 7.60 200 227 6.3
RL818 7.60 100 454 499 7.60 200 227 5.3
RL718 6.75 100 358 393 7.60 200 227 4.6
SL102 9.50 200 354 374 9.50 200 354 5.6
SL92 8.60 200 290 305 8.60 200 290 4.6
SL82 7.60 200 227 239 7.60 200 227 3.6
SL72 6.75 200 179 189 6.75 200 179 2.8
SL62 6.00 200 141 149 6.00 200 141 2.2
SL52 4.77 200 89 101 5.00 200 98 1.5
SL63 6.00 300 94 101 6.00 300 94 1.5
SL53 4.77 300 60 72 5.00 300 65 1.0
SL81 7.60 100 454 499 7.60 100 454 7.1
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OneSteel Reinforcing - REBAR Table
2
Bar Area (mm /m)
Mass (kg/m 2 )
2
Bar Area (mm ) 78.5 113 201 314 452 616 804 1020 1260
Bar Size (mm) 10 12 16 20 24 28 32 36 40
Bar Spacing (mm)
50 1570 2260 4020 6280 - - - - -
12.3 17.7 31.6 49.3 - - - - -
60 1308 1883 3350 5233 7533 10267 - - -
10.3 14.8 26.3 41.1 59.1 80.6 - - -
70 1121 1614 2871 4486 6457 8800 11486 14571 18000
8.8 12.7 22.5 35.2 50.7 69.1 90.2 114.4 141.3
80 981 1413 2513 3925 5650 7700 10050 12750 15750
7.7 11.1 19.7 30.8 44.4 60.4 78.9 100.1 123.6
90 872 1256 2233 3489 5022 6844 8933 11333 14000
6.8 9.9 17.5 27.4 39.4 53.7 70.1 89.0 109.9
100 785 1130 2010 3140 4520 6160 8040 10200 12600
6.2 8.9 15.8 24.6 35.5 48.4 63.1 80.1 98.9
110 714 1027 1827 2855 4109 5600 7309 9273 11455
5.6 8.1 14.3 22.4 32.3 44.0 57.4 72.8 89.9
120 654 942 1675 2617 3767 5133 6700 8500 10500
5.1 7.4 13.1 20.5 29.6 40.3 52.6 66.7 82.4
130 604 869 1546 2415 3477 4738 6185 7846 9692
4.7 6.8 12.1 19.0 27.3 37.2 48.5 61.6 76.1
140 561 807 1436 2243 3229 4400 5743 7286 9000
4.4 6.3 11.3 17.6 25.3 34.5 45.1 57.2 70.7
150 523 753 1340 2093 3013 4107 5360 6800 8400
4.1 5.9 10.5 16.4 23.7 32.2 42.1 53.4 65.9
160 491 706 1256 1963 2825 3850 5025 6375 7875
3.9 5.5 9.9 15.4 22.2 30.2 39.4 50.0 61.8
170 462 665 1182 1847 2659 3624 4729 6000 7412
3.6 5.2 9.3 14.5 20.9 28.4 37.1 47.1 58.2
180 436 628 1117 1744 2511 3422 4467 5667 7000
3.4 4.9 8.8 13.7 19.7 26.9 35.1 44.5 55.0
190 413 595 1058 1653 2379 3242 4232 5368 6632
3.2 4.7 8.3 13.0 18.7 25.5 33.2 42.1 52.1
200 393 565 1005 1570 2260 3080 4020 5100 6300
3.1 4.4 7.9 12.3 17.7 24.2 31.6 40.0 49.5
210 374 538 957 1495 2152 2933 3829 4857 6000
2.9 4.2 7.5 11.7 16.9 23.0 30.1 38.1 47.1
220 357 514 914 1427 2055 2800 3655 4636 5727
2.8 4.0 7.2 11.2 16.1 22.0 28.7 36.4 45.0
230 341 491 874 1365 1965 2678 3496 4435 5478
2.7 3.9 6.9 10.7 15.4 21.0 27.4 34.8 43.0
240 327 471 838 1308 1883 2567 3350 4250 5250
2.6 3.7 6.6 10.3 14.8 20.1 26.3 33.4 41.2
250 314 452 804 1256 1808 2464 3216 4080 5040
2.5 3.5 6.3 9.9 14.2 19.3 25.2 32.0 39.6
260 302 435 773 1208 1738 2369 3092 3923 4846
2.4 3.4 6.1 9.5 13.6 18.6 24.3 30.8 38.0
270 291 419 744 1163 1674 2281 2978 3778 4667
2.3 3.3 5.8 9.1 13.1 17.9 23.4 29.7 36.6
280 280 404 718 1121 1614 2200 2871 3643 4500
2.2 3.2 5.6 8.8 12.7 17.3 22.5 28.6 35.3
290 271 390 693 1083 1559 2124 2772 3517 4345
2.1 3.1 5.4 8.5 12.2 16.7 21.8 27.6 34.1
300 262 377 670 1047 1507 2053 2680 3400 4200
2.1 3.0 5.3 8.2 11.8 16.1 21.0 26.7 33.0
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