English to Portuguese Tech/Engineering Mechanics / Mech Engineering Carcaça de Caixas de Engrenagens

Contexto: descrição da caixa de engrenagens. Rib e ribbing têm várias traduções dependendo do contexto; os colegas sabem qual o termo mais usado para ribbing nesse contexto? Segue o fragmento. Obrigado.

[...] The housing sections are made by rigid cast design or in welded sheet steel construction. Optimum vibration characteristics with excellent smooth running have been additionally achieved by means of pronounced ribbing.[...]