Portuguese to English Tech/Engineering Construction / Civil Engineering masonry brickwork

Hi. I'm revising a piece describing the construction of industrial brick chimneys. It's a piece aimed at the general public, however fairly specific terms describing the process of construction are used. In this case, I am unsure exactly how to translate 'travamento'. Am I right in understanding that what is being referred to are courses of bricks placed 'end on', as it were, every 8 courses of brick? I have found various references which help, but am confused by the plethora of terms I have encountered. I understand it as something that interlocks, or links/joins/strenghtens. Could this be a 'bond' or 'tying in' or something else? At the moment, I have gone for a fairly vague 'strengthening element'. The original translator used 'framework' but I'm not sure this works here.

"O sistema de andaimes pode ser colocado tanto pelo interior como pelo exterior e, aproximadamente de 8 em 8 fiadas verticais, é realizado um travamento que consiste somente em colocar os tijolos na direção do eixo da chaminé."