Threaded Deformed Bar & Couplers
TR19 – TR51
Deformed bar with rolled threads at each end, spliced with matched mechanical couplers instead of lapped bars. Eleven sizes from TR19 to TR51. Mechanical splicing removes lap lengths, which cuts steel tonnage and relieves congestion in heavily reinforced sections such as columns, pile caps and transfer beams.
- Eleven sizes, TR19 through TR51
- Type D and Type H couplers to suit the size
- No lap lengths — less tonnage, less congestion
- Coupler steel rated well above the bar it joins
- Threaded ends
- Matched couplers
- Mill-certified steel
Technical specifications
Type D couplers
| Coupler | Outer Ø (mm) | Length (mm) |
|---|---|---|
| R19 | 33.0 | 110 |
| R22 | 37.2 | 132 |
| R35 | 58.5 | 224 |
| R38 | 62.5 | 224 |
| R41 | 66.5 | 224 |
| R51 | 83.0 | 266 |
Type H couplers
| Coupler | Outer Ø (mm) | Length (mm) |
|---|---|---|
| R25 | 42.2 | 140 |
| R28 | 47.4 | 155 |
| R32 | 52.2 | 190 |
| R36 | 60.0 | 200 |
| R43 | 71.0 | 235 |
Bar grades
| Standard | Grade | Yield (N/mm²) | Tensile (N/mm²) | Elongation min |
|---|---|---|---|---|
| TCVN 1651-2:2018 | CB400-V | 400 min | 570 min | 14% |
| TCVN 1651-2:2018 | CB500-V | 500 min | 650 min | 14% |
| JIS G 3112 | SD 390 | 390 – 510 | 560 min | — |
| JIS G 3112 | SD 490 | 490 – 625 | 620 min | — |
| ASTM A615/A615M | Grade 60 [420] | 420 min | 620 min | — |
Threaded bar is supplied in the grades below across three standards.
Coupler material
| Property | Requirement |
|---|---|
| Yield strength | ≥ 700 MPa |
| Tensile strength | ≥ 1,000 MPa |
To TCCS 38:2012/IBST.
Coupler type is selected by bar size — tell us your bar schedule and we will confirm which type applies.
Mechanical splice performance on a specific project must be verified against the governing code by your engineer.
Others in Reinforcing Steel Bars (Rebar)
Request pricing on Threaded Deformed Bar & Couplers
Send us your sizes, grades and tonnage with the delivery port and we will come back with pricing, lead time and freight.