How to build a reprap 3D printer – Prusa (easy to asembly)
“Before assembling a Prusa Mendel, make sure you have all the parts necessary. For the bill of materials, see Prusa Mendel.
This step takes about 15 minutes per triangle, for a total of 30 minutes.
There is a triangle on each side of the Prusa RepRap. You will need to make two of these and then connect them together (in the next steps) to form the Prusa frame. Each side is an equilateral triangle with a frame vertex on each corner. You can use either footed or non-footed vertices to build this. (The footed ones look better, but are not critical.) The instructions assume you are using footed vertices.”
More information here!