The reason why Mongolians build the door of the ger directing to the runrise is to know the time using the sunlight.
For a long time, Mongolians chose the best day for the moving their home. It is not allowed to build on the base of others’ ger because there is a belief that which means getting all the bad things of latter home.  These are the sequences how to build a ger. First of all, base the floor and place all the heavy things, such as upper frame and avdar, on it. After that, start placing their wooden wall from south west of the floor, and make it circle while using the tier in order to bond wall by wall. While the father or someone elder is lifting the upper frame, other family members support the upper frame by the main uprights and poles. After four main tiers of the upper frame are connected to the wall, start cover the base using the white felt and “tsavag”. The covering process goes from North to South. North root cloth should be the upon the South one. Thus, North tsavag is a span longer than South one, too. After the ger is clothed by white blanket and “hoshlongo”, felt roof, furnace and chimney, and narrow strip of felt will be placed. Finally, attach the curtain and place other furniture in the ger.
To put away the ger
Mongolians put the ger when the time to move. It is not allowed to start from whatever you want .There is a ritual sequence to put the ger away. 
First of all, take the rope off and fold it up and then progress starts from felt roof. After that, pull the north and south felts down by bundling it together. Then, the wall of building will be replaced from latticework. After taking the blanket down, start to put wooden base of the ger down. While doing that, south west latticework must not be cleaned. Because Mongolians believe that latticework has the all the good things related to the home.