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 | |
| G 48 | 29 mm | 48 mm |
| G 70 | 29 mm | 70 mm |
| G 90 | 29 mm | 90 mm |
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