As a rule in the house external doors with a height of 2100 mm and a width of 900,1000 or 1200 mm. A door with a width of 1200 mm includes an additional block with a width of 300 mm. The height of a single module depends on the construction of the floor (Specifically, how much the clean floor rises in relation to the subfloor.
Module height 2100 mm, width 350 mm. Made of calibrated, strength-graded wooden beams. Wood strength class C24