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AQ104.1 Minimum Loft Area & Dimensions Lofts used as a sleeping or living space shall meet the minimum area and dimension requirements of Sections AQ104.1.1 through AQ104.1.3.

AQ 104.1.1 Minimum area. Lofts shall have a floor area of not less than 35 square feet.

AQ 104.1.2 Minimum dimensions. Lofts shall be not less than 5 feet in any horizontal dimension.

AQ 104.1.3 Height effect on loft area. Portions of a loft with a sloped ceiling measuring less than 3 feet from the finished floor to the finished ceiling shall not be considered as contributing to the minimum required area for the loft

Exception: Under gable roofs with a minimum slope of 6 units vertical in 12 units horizontal (50 percent slope) portions of a loft with a sloped ceiling measuring less than 16 inches from the finished floor to the finished ceiling shall not be considered as contributing to the minimum required area for the loft.

AQ104.2 Loft Access. The access to and primary egress from lofts shall be of any type described in Sections AQ104.2.1 through AQ104.2.4.

AQ 104.2.1 Stairways. Stairways accessing lofts shall comply with this code or with Sections AQ104.2.1.1 through AQ104.2.1.5.

AQ 104.2.1.1 Width. Stairways accessing a loft shall not be less than 17 inches in clear width at or above the handrail. The width below the handrail shall be not less than 20 inches.

AQ 104.2.1.2 Headroom. The headroom in stairways accessing a loft shall be not less than 6 feet 2 inches, as measured vertically, from a sloped line connecting the tread or platform nosings in the middle of their width.

AQ 104.2.1.3 Treads and risers. Risers for stairs accessing a loft shall be not less than 7 inches and not more than 12 inches in height. Tread depth and riser height shall be calculated in accordance with one of the following formulas:

1 The tread depth shall be 20 inches minus four-thirds of the riser height.

2 The riser height shall be 15 inches minus three-fourths of the tread depth.

AQ 104.2.1.4 Landing platforms. The top tread and riser of stairways accessing lofts shall be constructed as a landing platform where the loft ceiling height is less than 6 feet 2 inches where the stairway meets the loft. The landing platform shall be 18 inches to 22 inches in depth measured from the nosing of the landing platform to the edge of the loft, and 16 to 18 inches in height measured from the landing platform to the loft floor.

AQ 104.2.1.5 Handrails. Handrails shall comply with Section R311.7.8.

AQ 104.2.1.6 Stairway guards. Guards at open sides of stairways shall comply with Section R312.1.

AQ 104.2.2 Ladders. Ladders accessing lofts shall comply with Sections AQ104.2.1 and AQ104.2.2

AQ 104.2.2.1 Size and capacity. Ladders accessing lofts shall have a rung width of not less than 12 inches, and 10- to 14-inch spacing between rungs. Ladders shall be capable of supporting a 200-lb load on any rung. Rung spacing shall be uniform within ³/₈ inch.

AQ 104.2.2.2 Incline. Ladders shall be installed at 70 to 80 degrees from horizontal.

AQ 104.2.3 Alternating tread devices. Alternating tread devices accessing lofts shall comply with Sections R311.7.11.1 and R311.7.11.2. The clear width at and below the handrails shall be not less than 20 inches.

AQ 104.2.4 Ships ladders. Ships ladders accessing lofts shall comply with Sections R311.7.12.1 and R311.7.12.2. The clear width at and below the handrails shall be not less than 20 inches.

AQ 104.2.5 Loft guards. Loft guards shall be located along the open side of lofts. Loft guards shall be not less than 36 inches in height or one-half of the clear height to the ceiling, whichever is less.