Offered Excel spreadsheet allows you to get the dimensions for constructing curves ( sweeps ), vertical and horizontal pipes for the manufacture of rectangular transition tees with coincident axes of the pipes of any diameter . Type in the yellow table cell outside diameter horizontal borehole pipes and vertical process and you will instantly get the ordinates and abscissas of the points to build the sweep . Move these points to paronite or cardboard , and connect them with each other smoothly . Lek ( unfolding ) is ready . If the printer can print available in full size.