1924 ORDINANCES - Laserfiche WebLink

Home Browse Search

(b) Walls, for warehouse class only excepting party and firewalls, for all buildings of other than the dwelling house class, not exceeding five stories or sixty- five (65) feet in height, shall have the upper two stories not less than twelve (12) inches thick, incfeasing four (4) inches in thickness for each two stories or fraction thereof below. (c) For all walls of buildings of the dwelling house class the upper three Stories shall be not less than eight (8) inches thick increasing four(41 inches in thickness for each three stories or fraction thereof below. (d) Walls in skelton construction shall be of brick, or stone concrete. They shall be supported by girders at each story, which shall be laid in Portland Cement Mortar. Fire walls not less than 12" thickness. (e) In all buildings except dwellings, frame buildings, and skelton construction, party walls and fire walls which serve as bearing walls on both sides;, shall be not less than sixteen (16) inches thick in the upper two stories or upper thirty (30) feet, increasing four(4) inches in thickness for each two stories or fraction therof below. All other fire walls shall be not less than twelve (12 ) inches thick in the upper four stories or upper fifty feet, increasing four (4) inches in thickness for bath two stories or fraction thereof below. Portland Cement Mortar only shall be used in such walls. (f) Reinforced stone or gravel concrete walls, with the steel reinforce- ment running both horizontally and vertically and weighing not less than one-half (1/2) pound per square foot of wall, may have a thickness four (4) inches less than that pre- scribed for brick walls. Vallee (g) Stone walls shall be four (4) inches thicker than required for brick (h) The foundation walls of all buildings over two stories in height shall •be four (4) inches thicker from footing to grade than required for the remainder of the wall. (i) All exterior and di inion walls over one story high, excepting such walls that face on a street and are finished with incombustible cornices, gutters, or crown mouldings, the walls of detached dwellings with peaked or hippedroofe, shall extend the full thickness of the top story to at least two (21 feet above the roof' surfacing as a parapet and be properly coped. Ware houses and all manufacturing or commercial build- ings shall have parapets three (3) feet above the roof surfacing and be coped, and walls not less tt:ari 9". (j) ?ire walls shall be continuous from foundation to three (3) feet above level, and be coped. (k) Hollow blocks of terra cotta or concrete blocks when used for bearing walls shall have not more than 50% of cellular space. Portland Cement; only shall be used in the manufacture of concrete blocks. The coarse aggregate shall be of suitable material graded in size, but in no case shall the maximum dimension exceed one-half the minimum width of any section of the: finished block. Concrete blocks shall not be used in construction until they have attained the age of 28 days, or developed the strength required in this section. All b4ilding blocks shall be laid in Portland Cement Mortar. 11) The compressive strength of building blocks shall in all cases be calculated upon the gross area of the bedding faces, no account being taken of the cellular spaces. The aberage ultimate compressive strength for terra cotta blocks laid