406.3.3.1 Ramps.

Ramps shall have a gradient not exceeding one in seven, with nonslip surfaces, and shall be located entirely within the property line. However, upon application to the commissioner, steeper gradients may be accepted, but in no event greater than one in three.

406.3.4 Separation.

Separations shall comply with the following:

   1.   The private garage shall be separated from the dwelling unit and its attic area by means of a minimum 1-hour fire-rated construction. Garages beneath habitable rooms shall be separated from all habitable rooms above by not less than 1-hour fire-rated construction. Openings from a private garage directly into a room used for sleeping purposes shall not be permitted.

   2.   No air used for heating, cooling, or ventilation shall be circulated through private garages to dwelling areas.

   3.   A separation is not required between a Group R-3 occupancy and a carport, provided the carport does not have any enclosed areas above.

   4.   For free standing private garages where the fire separation distance from the nearest exterior wall is less than 5 feet, such exterior walls shall have a fire-resistance rating not less than one hour.

406.3.5 Automatic garage door openers.

Automatic garage door openers, if provided, shall be listed in accordance with UL 325.

406.4 Public parking garages .

Parking garages, other than private parking garages, shall be classified as public parking garages and shall comply with the provisions of Sections 406.4.2 through 406.4.10 and shall be classified as either an open parking garage or an enclosed parking garage. Open parking garages shall also comply with Section 406.5. Enclosed parking garages shall also comply with Section 406.6. See Section 510 for special provisions for parking garages.