CSA G30.18Metric
35M Rebar (Canadian 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
1.406″
35.7 mm
Nominal Area (Ab)
1.55 in²
1000 mm²
Unit Weight
5.275 lb/ft
7.85 kg/m
90° Standard Hook
16.9″ tail
Pin: 11.24″ (286 mm)
Cross-Sectional & Geometric PropertiesDual US & SI Units
| Bar Designation | 35M | Code Standard | CSA G30.18 |
| Nominal Diameter (db) | 1.406 in | Metric Diameter | 35.7 mm |
| Cross-Sectional Area (Ab) | 1.55 in² | Metric Area | 1000 mm² |
| Linear Weight | 5.275 lb/ft | Metric Mass | 7.85 kg/m |
| Nominal Perimeter | 4.417 in | Metric Perimeter | 112.2 mm |
| Minimum Clear Spacing | max(1.0″, 1.406″) | 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 | 11.24″ (286 mm) | 16.9″ (12db) | 428 mm |
| 180° Standard Hook | 11.24″ (286 mm) | 5.6″ (max(4db, 2.5″)) | 143 mm |
CAD Cross-Section SchematicCSA G30.18
Nominal Linear Weight5.275 lb/ft (7.85 kg/m)
Common Structural Applications
- ›High-rise core walls, tower columns, and major bridge bents
Engineering Detailing Note
Nominal area of 1000 mm². Largest standard bar size commonly permitted for lap splicing under CSA A23.3.
35M 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. |
|---|---|---|---|---|---|---|---|---|
| 13333mm²/m | 10000mm²/m | 8000mm²/m | 6667mm²/m | 5714mm²/m | 5000mm²/m | 4000mm²/m | 3333mm²/m | 2500mm²/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) | 1925 mm | 2502 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 28 MPa (~4060 psi) | 1667 mm | 2167 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 35 MPa (~5075 psi) | 1491 mm | 1938 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
| 42 MPa (~6090 psi) | 1361 mm | 1769 mm | CSA A23.3 / ACI 318M | ld ≥ 300 mm |
Integrated Calculation Engine
Design Reinforcement with 35M 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.
Previous Size30M Rebar (Canadian Standard Metric)
All Rebar Sizes & Charts →