The covered walkway is oriented south-north. It measures 16 meters long by 3 meters wide at most. It is made up of three parts (corridor, antechamber, bedroom), the antechamber and the bedroom being separated by a middle porthole slab2:
the first part is a long corridor 4 m long by 1.20 m wide on average raised by approximately 0.40 m compared to the antechamber;
the antechamber measures 5.60 m long by 2.50 m wide on average, widening gradually towards the back;
the burial chamber measures 5 m long by 3.20 m wide.
The whole is bordered by a series of orthostats. In the northeast corner, the orthostat was doubled by a support protruding 0.25 m from the ground. The cover tables that rested on these supports have all disappeared.
According to Jean Guilaine, it is therefore not strictly speaking a covered walkway, which would imply a substantially constant width over the entire length of the building, but "a large corridor dolmen with progressive narrowing towards the entry »2.
The whole is enclosed in a circular mound 22 m in diameter3 consolidated around its perimeter by 20 raised slabs. (Wikipedia)