EN 10080 / Eurocode 2Metric
12 mm Rebar (European Standard Metric)
Authoritative dimensional properties, unit weight, cross-sectional area, spacing tables, standard hook geometries, and ACI 318-19 tension development length for structural concrete design.
Nominal Diameter
0.472″
12 mm
Nominal Area (Ab)
0.175 in²
113.1 mm²
Unit Weight
0.597 lb/ft
0.888 kg/m
90° Standard Hook
5.7″ tail
Pin: 1.89″ (48 mm)
Cross-Sectional & Geometric PropertiesDual US & SI Units
| Bar Designation | Ø12 | Code Standard | EN 10080 / Eurocode 2 |
| Nominal Diameter (db) | 0.472 in | Metric Diameter | 12 mm |
| Cross-Sectional Area (Ab) | 0.175 in² | Metric Area | 113.1 mm² |
| Linear Weight | 0.597 lb/ft | Metric Mass | 0.888 kg/m |
| Nominal Perimeter | 1.484 in | Metric Perimeter | 37.7 mm |
| Minimum Clear Spacing | max(1.0″, 0.472″) | ACI Provision | ACI 318-19 §25.2.1 |
ACI 318-19 Standard Hook Geometry (Table 25.3.1)
| Hook Type | Min. Inside Bend Pin | Extension Length (US) | Extension Length (SI) |
|---|---|---|---|
| 90° Standard Hook | 1.89″ (48 mm) | 5.7″ (12db) | 144 mm |
| 180° Standard Hook | 1.89″ (48 mm) | 2.5″ (max(4db, 2.5″)) | 64 mm |
CAD Cross-Section SchematicEN 10080 / Eurocode 2
Nominal Linear Weight0.597 lb/ft (0.888 kg/m)
Common Structural Applications
- ›Stirrups for commercial beams and ties for medium columns
- ›Two-way residential floor slabs and basement retaining walls
Engineering Detailing Note
Eurocode 2 mandrel diameter for bends is 4db (48 mm). Standard European secondary steel.
Ø12 Rebar Spacing Table (As / Unit Width)
Area of longitudinal reinforcement provided for slabs, walls, and footing mats at given on-center spacings.
Metric Spacings (mm² of steel per linear metre of slab/wall)
| 75 mm o.c. | 100 mm o.c. | 125 mm o.c. | 150 mm o.c. | 175 mm o.c. | 200 mm o.c. | 250 mm o.c. | 300 mm o.c. | 400 mm o.c. |
|---|---|---|---|---|---|---|---|---|
| 1508mm²/m | 1131mm²/m | 905mm²/m | 754mm²/m | 646mm²/m | 566mm²/m | 452mm²/m | 377mm²/m | 283mm²/m |
ACI 318-19 Tension Development Length (ld)
Calculated using ACI 318-19 Section 25.4.2.3 simplified method for Grade 60 (420 MPa) deformed bars in normal-weight concrete with clear spacing ≥ db and clear cover ≥ db.
| Concrete Strength (f'c) | Bottom Bars (ld) [ψt = 1.0] | Top Bars (ld) [ψt = 1.3] | Governing Provision | Minimum Limit |
|---|---|---|---|---|
| 21 MPa (~3045 psi) | 524 mm | 681 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 28 MPa (~4060 psi) | 454 mm | 590 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 35 MPa (~5075 psi) | 406 mm | 527 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 42 MPa (~6090 psi) | 370 mm | 481 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
Integrated Calculation Engine
Design Reinforcement with Ø12 in AXIS
Run instant ACI 318-19 beam flexure, shear stirrup spacing, column P-M interaction, and development length checks with full KaTeX step-by-step audit logs.
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