(a) Quantities exceeding five hundred (500) cubic feet of loose combustible fiber shall be stored in fire-resistive storage rooms conforming to the applicable provisions of Section 3129.43(c), having incombustible floor, wall and ceiling construction with a fire resistance rating of not less than two (2) hours. However, when the quantity of combustible fiber stored in such rooms exceeds one thousand (1,000) cubic feet, the required fire resistance rating shall be not less than four (4) hours for walls and partitions and not less than three (3) hours for floor and ceiling construction.
(b) All such fire-resistive rooms shall have provisions for venting gas and smoke to the outer air as specified in Section 3129.43(c), except that the required vent area need not exceed one (1) square foot for each two hundred (200) cubic feet of room volume.
(c) All interior openings within enclosures of such fire-resistive storage rooms shall have self-closing or automatic opening protectives. Enclosures required to have a fire resistance rating of two (2) hours shall have opening protectives with a fire resistance rating of not less than one and one-half (1-1/2) hours. Enclosures required to have a fire resistance rating greater than two (2) hours shall have openings protected with opening protectives on both sides of the opening. Such opening protectives shall have a combined fire resistance rating of not less than four (4) hours.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)