Properties of Reinforcing steel
The tables below show the design properties for common canadian and american reinforcing bar sizes
Canadian Bars
These are the properties of typical Canadian bars.
| Name | Diameter (in) | Area (in2) | Diameter (mm) | Area (mm2) |
|---|---|---|---|---|
| 10M | 0.39 | 0.155 | 11.3 | 100 |
| 15M | 0.59 | 0.31 | 16 | 200 |
| 20M | 0.79 | 0.465 | 19.5 | 300 |
| 25M | 0.98 | 0.775 | 25.2 | 500 |
| 30M | 1.18 | 1.085 | 29.9 | 700 |
| 35M | 1.38 | 1.55 | 35.7 | 1000 |
| 45M | 1.77 | 2.325 | 43.7 | 1500 |
| 55M | 2.17 | 3.875 | 56.4 | 2500 |
American Bars
These are the properties of typical American bars.
| Name | Diameter (in) | Area (in2) | Diameter (mm) | Area (mm2) |
|---|---|---|---|---|
| #3 | 0.38 | 0.110 | 9.53 | 71 |
| #4 | 0.5 | 0.200 | 12.7 | 129 |
| #5 | 0.63 | 0.310 | 15.9 | 200 |
| #6 | 0.75 | 0.440 | 19.1 | 284 |
| #7 | 0.88 | 0.600 | 22.2 | 387 |
| #8 | 1 | 0.790 | 25.4 | 510 |
| #9 | 1.13 | 1.00 | 28.7 | 645 |
| #10 | 1.27 | 1.27 | 32.3 | 819 |
| #11 | 1.41 | 1.56 | 35.8 | 1006 |
| #14 | 1.69 | 2.25 | 43 | 1452 |
| #18 | 2.26 | 4.00 | 57.3 | 2581 |
Weld size to develop bars
These are minimum fillet weld and plate sizes to develop 60ksi rebar in a butt weld
| Bar Size | Min. Weld Size | Min. Plate thk |
|---|---|---|
| #3 | 1/4" (6mm) | 1/4" (6mm) |
| #4 | 5/16" (8mm) | 1/4" (6mm) |
| #5 | 3/8" (10mm) | 1/4" (6mm) |
| #6 | 7/16" (12mm) | 5/16" (8mm) |
| #7 | 1/2" (14mm) | 3/8" (10mm) |
| #8 | 9/16" (16mm) | 3/8" (10mm) |
| #9 | 5/8" (16mm) | 7/16" (12mm) |
| #10 | 11/16" (18mm) | 1/2" (14mm) |
| #11 | 3/4" (20mm) | 9/16" (16mm) |
Standard detailing bar lengths
These are efficient lengths to use for detailing in Canada, to minimize wastage on standard mill length of rebar.
| Metric Length (mm) | US Length (in) |
|---|---|
| 18000 | 59'-1" |
| 12000 | 39'-4" |
| 9000 | 29'-6" |
| 8000 | 26'-3" |
| 7500 | 24'-7" |
| 7000 | 22'-11" |
| 6500 | 21'-4" |
| 6000 | 19'-8" |
| 5500 | 18'-0" |
| 5000 | 16'-5" |
| 4800 | 15'-9" |
| 4700 | 15'-5" |
| 4500 | 14'-9" |
| 4200 | 13'-9" |
| 4000 | 13'-1" |
| 3800 | 12'-6" |
| 3600 | 11'-9" |
| 3200 | 10'-6" |
| 3000 | 9'-10" |
| 2750 | 9'-0" |
| 2571 | 8'-5" |
| 2400 | 7'-10" |
| 2250 | 7'-5" |
| 2000 | 6'-7" |
| 1800 | 5'-11" |
| 1626 | 5'-4" |
| 1500 | 4'-11" |
| 1200 | 3'-11" |
| 1000 | 3'-3" |
Density of reinforcing steel
ρ = 0.2833 lb/in3 = 489.6 lb/ft3
To calculate weight in lb/ft, multiply bar area (in2) by 3.4. Eg, for #5, 0.31in2 x 3.4 = 1.05lb/ft
Calcs.app