Fabricados sob Norma ABNT NBR 15217, em aço galvanizado a quente com cobertura de zinco Z275. Garantem resistência mecânica e durabilidade em condições de uso extremo.
| A | B | C | |
| C 25 x 30 | 25 mm | 30 mm | – |
| C 25 x 30 Amassada | 25 mm | 30 mm | 3 mm |
| C 13 x 30 | 14 mm | 30 mm | – |
| 23 x 23 Perfurada | 23 mm | 23 mm | – |
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