The second layer of a start-up two chain loop chain will have the first column, so start with one layer at a regular column of the previous layer of the second last column and two kiertopylväällä. Then repeat the two normal column and two pairs of rotation of the column so that the layer kiertopylväisiin ends. Add a layer at the end of a further 2 ch to turn. Continue until the work height of 50 (150) cm.