Vastu Architecture Rules to construct a Factory or Industrial Plant : 
30.  The main door of factory should be clean and clear properly to ensure and entry of     positive energy in the factory.
31. Auspicious symbols as per  one’s faith like Swastika, Aum, Trident, or  Cross should be kept  or placed  outside main door of the factory.
32. An octagonal shape mirror or pa-kua with wirror should be  kept outside  main door of the factory because its reflects the inauspicious  and negative energy to entering in the factory.
33. Factory’s plot should not be  situated on the  dead end of the road , because its  not auspicious.
34. Factory’s building and floor should be more higher in South-West angle side than other direction.
35.Open space should be leave more in North and East direction  than  south and West direction in the factory’s plot.
36. Chimeny, Boiler , transformer, electric equipment fire equipment, fire place should be kept or built in the South-East angle direction in the factory.