#14 Rebar (1-3/4 Inch Jumbo Bar)
Authoritative dimensional properties, unit weight, cross-sectional area, spacing tables, standard hook geometries, and ACI 318-19 tension development length for structural concrete design.
| Bar Designation | #14 | Code Standard | ASTM A615 / A706 |
| Nominal Diameter (db) | 1.693 in | Metric Diameter | 43 mm |
| Cross-Sectional Area (Ab) | 2.25 in² | Metric Area | 1452 mm² |
| Linear Weight | 7.65 lb/ft | Metric Mass | 11.38 kg/m |
| Nominal Perimeter | 5.319 in | Metric Perimeter | 135.1 mm |
| Minimum Clear Spacing | max(1.0″, 1.693″) | ACI Provision | ACI 318-19 §25.2.1 |
| Hook Type | Min. Inside Bend Pin | Extension Length (US) | Extension Length (SI) |
|---|---|---|---|
| 90° Standard Hook | 17″ (430 mm) | 20.3″ (12db) | 516 mm |
| 180° Standard Hook | 17″ (430 mm) | 6.8″ (max(4db, 2.5″)) | 172 mm |
Common Structural Applications
- ›Massive foundation mats, bridge pylons, and skyscraper mega-columns
- ›Cantilever retaining wall base dowels under exceptional surcharge
- ›Heavy civil and nuclear safety-related structures
CRITICAL: Lap splices are NOT permitted for #14 bars in tension per ACI 318-19 §25.5.1.1. Must use full mechanical butt splices or approved full penetration welds. Bend pin diameter is 10db.
#14 Rebar Spacing Table (As / Unit Width)
Area of longitudinal reinforcement provided for slabs, walls, and footing mats at given on-center spacings.
| 3″ o.c. | 4″ o.c. | 5″ o.c. | 6″ o.c. | 7″ o.c. | 8″ o.c. | 9″ o.c. | 10″ o.c. | 12″ o.c. | 14″ o.c. | 16″ o.c. | 18″ o.c. |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 9.000in²/ft | 6.750in²/ft | 5.400in²/ft | 4.500in²/ft | 3.857in²/ft | 3.375in²/ft | 3.000in²/ft | 2.700in²/ft | 2.250in²/ft | 1.929in²/ft | 1.688in²/ft | 1.500in²/ft |
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 |
|---|---|---|---|---|
| 3,000 psi | 92.7″(2355 mm) | 120.5″(3061 mm) | ACI 318-19 Table 25.4.2.3 | ld ≥ 12″ (300 mm) |
| 4,000 psi | 80.3″(2040 mm) | 104.4″(2652 mm) | ACI 318-19 Table 25.4.2.3 | ld ≥ 12″ (300 mm) |
| 5,000 psi | 71.8″(1824 mm) | 93.4″(2372 mm) | ACI 318-19 Table 25.4.2.3 | ld ≥ 12″ (300 mm) |
| 6,000 psi | 65.6″(1666 mm) | 85.2″(2164 mm) | ACI 318-19 Table 25.4.2.3 | ld ≥ 12″ (300 mm) |
Design Reinforcement with #14 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.