Drains are made from very thick slabs by sawing, shaping and subsequent hammering or flaming with the addition of slits for the discharge of rainwater. 
The overflow drains are made from thick slabs by sawing, shaping and subsequent hammering on the surface, creating a cavity on the length of the slab of approximately 2 cm for the collection of...
Kerbing corners are made from very thick slabs by sawing, shaping and subsequent flaming of the external sides (for at least 15 cm). Used almost always in pairs at the end of roadways, they connect...