EN 10080 / Eurocode 2Metric
25 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
0.984″
25 mm
Nominal Area (Ab)
0.761 in²
490.9 mm²
Unit Weight
2.589 lb/ft
3.853 kg/m
90° Standard Hook
11.8″ tail
Pin: 4.92″ (125 mm)
Cross-Sectional & Geometric PropertiesDual US & SI Units
| Bar Designation | Ø25 | Code Standard | EN 10080 / Eurocode 2 |
| Nominal Diameter (db) | 0.984 in | Metric Diameter | 25 mm |
| Cross-Sectional Area (Ab) | 0.761 in² | Metric Area | 490.9 mm² |
| Linear Weight | 2.589 lb/ft | Metric Mass | 3.853 kg/m |
| Nominal Perimeter | 3.092 in | Metric Perimeter | 78.5 mm |
| Minimum Clear Spacing | max(1.0″, 0.984″) | 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 | 4.92″ (125 mm) | 11.8″ (12db) | 300 mm |
| 180° Standard Hook | 4.92″ (125 mm) | 3.9″ (max(4db, 2.5″)) | 100 mm |
CAD Cross-Section SchematicEN 10080 / Eurocode 2
Nominal Linear Weight2.589 lb/ft (3.853 kg/m)
Common Structural Applications
- ›Heavy commercial building transfer beams, bridge bents, and pile caps
- ›High-rise tower column vertical steel
Engineering Detailing Note
Area is 491 mm²; weighs 3.85 kg/m. Mandrel diameter is 7db = 175 mm.
Ø25 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. |
|---|---|---|---|---|---|---|---|---|
| 6545mm²/m | 4909mm²/m | 3927mm²/m | 3273mm²/m | 2805mm²/m | 2455mm²/m | 1964mm²/m | 1636mm²/m | 1227mm²/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) | 1348 mm | 1752 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 28 MPa (~4060 psi) | 1167 mm | 1517 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 35 MPa (~5075 psi) | 1044 mm | 1357 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 42 MPa (~6090 psi) | 953 mm | 1239 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
Integrated Calculation Engine
Design Reinforcement with Ø25 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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