#11 Rebar
The top of routine reinforcing: #11 closes out the common bar sizes, matching the old 1 1/4 inch square, with only specialty #14 and #18 above it.
1.410 inch diameter, 1.56 in2, 5.313 lb per foot
| Nominal diameter | 1.410 in (35.8 mm) |
| Cross section area | 1.56 in2 (1006 mm2) |
| Weight | 5.313 lb per foot (7.907 kg per meter) |
| Typical grade | Grade 60, 60 ksi yield |
| Soft metric name | No. 36 |
| 20 ft stock bar | about 106 lb |
| Nearest Canadian bar | 35M |
Notes for design and site
Everything routine ends at #11: it is the largest bar ACI generally allows to be lap spliced at all, with #14 and #18 requiring couplers, welds or special end conditions, and that boundary shapes how heavy columns and mats get detailed. Its 1.56 in2 comes from the 1 1/4 inch square bar it replaced.
The 40 diameter rough figure is about 56 inches, and a 20 ft bar weighs 106 pounds: nothing here is hand work. On drawings the metric name is No. 36, and in Canadian terms the closest bar is 35M at 1000 mm2.
Related Calculators and Reference
- Development Length and Lap Splice Calculator: the last size where a lap is even an option.
- Rebar Cutting List Calculator: schedules for the heaviest routine bars.
- #10 Rebar: one step down the square bar family.
- Quantity Takeoff Calculator: tonnage where every bar is 48 kg.
- Unit Weight of Steel: the density behind the 106 pounds.
- Concrete Reinforcing Steel Institute: the US industry body for reinforcing steel.