Enforcement Order of the Parking Places Act
Chapter 1 Criteria of structures and equipment
(Scope of application)
Article 6 The regulations in this chapter shall be applied to off-street parking place in which area of a part provided for car parking lots is 500 m2 or more.
(Technical criteria on driveway)
Article 8, paragraph 3 Driveway in a building (meaning ,hereinafter, building referred to Article 2, paragraph 1 of the Building Standard Law) used as off-street parking place shall be constructed as specified in each of the following items.
Item a) Height to lower edge of a beam above floor surface shall be 2.3 m or more.
Item b) ...
Reference; the Building Standard Law
Article 2. In this Law, the meaning of the terms in the following items shall be as defined in each item concerned:
(1) Buildings: Structures fixed on the ground having roofs as well as columns or walls (including structures of similar construction); gates or fences attached thereto; structures used as grand-stands; or structures used as offices, stores, play houses, warehouses or other facilities similar thereto established in underground or elevated
structures (excluding those facilities which are provided within the site of a railway or tramway for the operation and maintenance thereof, as well as overbridges, platform sheds, storage tanks and other facilities similar thereto). Building equipment shall be considered as part of a building.
(Height of a part provided for car parking lots)
Article 9 Height to lower edge of a beam above floor surface shall be 2.1 m or more at a part provided for car parking lots in a building used as off-street parking place.
Article 12 In a building used as off-street car parking place, ventilation system which has a capacity to directly exchange inside air 10 times or more per hour for outside air shall be installed; provided, however, that this shall not apply to case that area of window and/or other openings which is effective for ventilation is 1/10 or more of floor area.
Answer by MAKOTO@TUS Mar.15.2012