Massive wooden staircase of simple and calm design.This staircase is easy to increase in height to any number of floors.To do this, select the upper (4th) march and raise it by 3 meters (6, 9...),and fill the resulting void with copies of the 2nd and 3rd marches,which also raise by 3 meters (6, 9...).It can also be easily reduced by connecting marches 1 and 4 and deleting 2 and 3.Pitch 300*150 mm. The surfaces of the parts are smooth lacquered, without textures.The model is available in blend, dae, obj, x3d, stl, abc, glb, usdc, fbx formats.