(a) Every building hereafter erected, altered or added to, when part of a pair or group, shall be separated from the adjoining buildings by party walls.
(b) Party walls and fire walls shall be constructed only of fireproof materials, and their thickness shall be in conformity with the tables for exterior walls and other provisions of this chapter. Fire walls, and not party walls, may be built of hollow noncombustible materials as may be approved by the Building Inspector, provided that party walls and fire walls of buildings not exceeding a height of forty feet from the top of the foundation wall may be of hollow tile or cement-concrete block of a thickness of not less than eight inches for buildings not over forty-five feet in depth, and of a thickness of not less than twelve inches for buildings over forty-five feet in depth and up to sixty-five feet in depth. Party walls shall be continuous throughout their entire height. In the case of flat roofs, party walls must extend through and to a point not less than nine inches above the roof and be capped with stone, tile, metal or other noncombustible material. All frame buildings of whatever class of semidetached or multi-type shall have party walls of noncombustible materials. In buildings with other than flat roofs, noncombustible party walls shall be extended in height to the underside of the sheathing.
(c) Where apartments are built over a business building, the fire wall may be built of iron or steel beams of approved strength. Such beams, with their support, shall be fireproofed as directed by the Building Inspector.
(Ord. 288. Passed 5-24-54.)