(a) This section applies to a warehouse, storehouse, or mill building.
(b) Each facility subject to this section and § 791.002 that has a lot area greater than 8,000 square feet shall provide, in addition to the fire escape required by § 791.002, one additional fire escape for:
(1) each 8,000 square feet of area in excess of the initial 8,000 square feet; and
(2) the area in excess of the largest multiple of 8,000 square feet contained in the facility’s lot area if that excess is more than 3,500 square feet.