The assemblage of the tie-rods is simple and fast, provided that that bars and its accessories are easily threaded without the use of special tools.

For the auto-injecting tie-rod the installation of the drilling element (tricone or drill) is required in the end of the first bar to be introduced in the land. As the perforation and the simultaneous injection of cement solution are forwarding, other bars shall be implemented with the aid of the joining sleeves and its respective sealing rings.

So as to ensure a uniform coverage of the bar during the injection of the cement solution, specific centralizers shall be installed. At the conclusion of the tie-rod installation in the land, we shall wait for a term from 4 to 7 days for the prestressing to be performed.

In the event of a one bar tie-rod its assemblage is made by the union of the bars to the joining sleeves, outside the perforation. After its introduction in the land, the one step or several steps injection of cement solution is made with the aid of manchetes [type of valve or pipeo].