32 mm B500B Steel Rebar
32mm rebar is the premium large-diameter choice for heavily loaded columns, deep piles, bridge structures and transfer elements. With 804.2 mm² cross-section and 6.318 kg/m, it delivers maximum tensile capacity per bar. Grade B500B to DIN 488 / EN 10080 — supplied with full export documentation and EN 10204 3.1 MTC.
Technical Specification: 32mm Rebar (B500B)
The 32 mm B500B rebar is among the largest hot-rolled diameters routinely specified in structural concrete. Its nominal mass of 6.318 kg per metre and cross-sectional area of 804.2 mm² deliver characteristic tensile capacity of approximately 402 kN per bar — making it the efficient choice for structures where fewer, heavier bars are preferable to congested smaller-diameter cages.
Conforming fully to DIN 488 and EN 10080, grade B500B provides fyk ≥ 500 MPa, strength ratio k ≥ 1.08, and elongation Agt ≥ 5.0%. The ribbed profile delivers reliable bond performance in concrete grades up to C90/105 per Eurocode 2.
| Property | Value |
|---|---|
| Diameter (nominal) | 32 mm |
| Nominal mass | 6.318 kg/m |
| Cross-sectional area | 804.2 mm² |
| Bars per tonne (12 m) | ≈ 13 bars (≈ 158 m) |
| Grade | B500B (DIN 488, EN 10080) |
| Min. yield strength (fyk) | 500 MPa |
| Ductility class | B (k ≥ 1.08, Agt ≥ 5.0%) |
| Surface | Hot-rolled ribbed |
| Stock lengths | 6–18 m (typically 12 m) |
Applications for 32mm Rebar
Structural contexts that demand the highest tensile capacity per bar
Heavy Columns & Piles
32 mm bars are the preferred longitudinal reinforcement in mega-columns and large-diameter bored piles. At 804.2 mm², four 32 mm bars outperform eight 20 mm bars while drastically simplifying cage fabrication and concrete pouring.
Bridge Piers & Caissons
Large-diameter bridge pier shafts routinely specify 32 mm primary bars. High ductility meets seismic bridge code requirements under EN 1998-2 and comparable international standards.
Transfer Beams & Mat Foundations
Mat foundations and transfer girders under high-rise towers frequently require 32 mm bottom bars. The reduced bar count improves constructability and allows better aggregate passage.
Weight Table: 32mm Rebar — Common Lengths
All masses calculated using the DIN 488 formula d²(mm) × 0.00617 kg/m.
| Length | Mass per bar (kg) | Bars per tonne |
|---|---|---|
| 6 m | 37.91 kg | ≈ 26 |
| 9 m | 56.86 kg | ≈ 18 |
| 12 m | 75.82 kg | ≈ 13 |
| 18 m | 113.72 kg | ≈ 9 |
Compare all diameters on the rebar weight chart. Explore grade and ductility parameters on the steel grades page. For coupler options see rebar couplers.
Mechanical Splicing for 32mm Rebar
Lap splices for 32 mm B500B in typical C30/37 concrete require approximately 1,600–2,240 mm (50φ–70φ). Each lap adds 6.318 kg/m × lap length in additional steel. Parallel-thread mechanical couplers eliminate the overlap entirely, reducing steel use and simplifying reinforcement cage assembly. This is particularly valuable in columns, piles and walls where 32 mm bars cluster near the element perimeter.
Frequently Asked Questions — 32mm Rebar
What is the weight of 32mm rebar per metre?
What tensile capacity does a single 32mm B500B bar provide?
Is 32mm rebar weldable under DIN EN ISO 17660?
What is the minimum concrete cover for 32mm rebar?
What export markets do you supply 32mm B500B rebar to?
Source German-standard 32mm rebar with full export documentation
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