A barra chata com seção transversal retangular possui superfícies lisas, sem cantos vivos. Este produto é extremamente versátil, sendo empregado principalmente em grades e portões, esquadrias, máquinas, implementos agrícolas e rodoviários e na indústria mecânica em geral.
Dispomos das seguintes bitolas:
| Bitola | Dimensões (L)(E) |
| 1/2 x serr | 12,70mm x 2,50mm |
| 5/8 x serr | 15,88mm x 2,50mm |
| 3/8 x 1/8 | 9,70mm x 3,17mm |
| 1/2 x 1/8 | 12,7mm x 3,17mm |
| 5/8 x 1/8 | 15,88mm x 3,17mm |
| 3/4 x 1/8 | 19,05mm x 3,17mm |
| 7/8 x 1/8 | 22,20mm x 3,17mm |
| 1 x 1/8 | 25,40mm x 3,17mm |
| 1.1/4 x 1/8 | 31,70mm x 3,17mm |
| 1.1/2 x 1/8 | 38,10mm x 3,17mm |
| 2 x 1/8 | 50,80mm x 3,17mm |
| 1/2 x 3/16 | 12,70mm x 4,75mm |
| 5/8 x 3/16 | 15,88mm x 4,75mm |
| 3/4 x 3/16 | 19,05mm x 4,75mm |
| 1 x 3/16 | 25,40mm x 4,75mm |
| 1.1/4 x 3/16 | 31,70mm x 4,75mm |
| 1.1/2 x 3/16 | 38,10mm x 4,75mm |
| 2 x 3/16 | 50,80mm x 4,75mm |
| 5/8 x 1/4 | 15,88mm x 6,30mm |
| 3/4 x 1/4 | 19,05mm x 6,30mm |
| Bitola | Dimensões (L)(E) |
| 1 x 1/4 | 25,40mm x 6,30mm |
| 1.1/4 x 1/4 | 31,70mm x 6,30mm |
| 1.1/2 x 1/4 | 38,10mm x 6,30mm |
| 2 x 1/4 | 50,80mm x 6,30mm |
| 3 x 1/4 | 76,20mm x 6,30mm |
| 1.1/4 x 5/16 | 31,70mm x 7,94mm |
| 1.1/2 x 5/16 | 38,10mm x 7,94mm |
| 2 x 5/16 | 50,80mm x 7,94mm |
| 1.1/4 x 3/8 | 31,70mm x 9,53mm |
| 1.1/2 x 3/8 | 38,10mm x 9,53mm |
| 2 x 3/8 | 50,80mm x 9,53mm |
| 2 x 1/2 | 50,80mm x 12,70mm |
| 2.1/2 x 1/2 | 63,50mm x 12,70mm |
| 3 x 1/2 | 76,20mm x 12,70mm |
| 2.1/2 x 5/8 | 63,50mm x 15,88mm |
| 3 x 5/8 | 76,20mm x 15,88mm |
| 3 x 3/4 | 76,20mm x 19,05mm |
| 4 x 3/4 | 101,60mm x 19,05mm |
| 3 x 1 | 76,20mm x 25,40mm |