Answer48 - Let us suppose you have slightly East facing site on which you construct a house. Find out the centre point of the Eastern wall on the plan. Tilt the plan to the direction the site is facing. Put your compass on it and draw a  North -South line passing through the centre of the Eastern wall. Divide the North South line into 9 parts. Draw lines on the 2nd , 3rd , 4th grids to cut the Eastern wall. These are the places at which you can have your main door.

ü ü ü N Exalted
Zones
Eastern Wall