1917 (#619-628) - Laserfiche WebLink

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187 The footing for such a wall shall be not lees than 5© per cent wider than the wall resting on it. Under no circumstances shall a foundation of any brick or stone building be built on filled or made ground. Foundation shall be proportioned to the actual load they must sustain in the complete and occupied building and must be at least ~" thicker than the walls next above them, unless otherwise specifically provided for in this Ordinance. Details of foundation are subject to the approval of the building inspector and must conform with good engineering practice. For Class A, B and C buildings, the foundation walls shall have sufficient depth to be approved by the buildinginspector. A greater depth may be required by the building inspector if it is necessary in his Judgment in order to obtain the necessary stability. Piers shall be built of concrete or good well burned brick laid in cement mortar, except that ornmmental piers fronting on the street may be built of stone. Every masonry pier, buttress or pilaster exceeding in height four times its least dimension and carrying two-thirds of its safe load shall be bonded each 4' with cast iron plates or re-inforced concrete slabs or with heavy g~lvanized wire mesh of not less than $16 wire and not larger than 1/2 inch mesh. In brick piers where wire mesh is used it must be laid in full size of the pier every seventh course ~nd for piers fronting On a street bond stone to conform with the kind of stone for the trimming of the front may be used above the sidewalk level. Piers other than those in the front must be capped with iron or steel plates of proper strenght and size under all columns or girders. No stone post or pier for the support of posts or columns shall be used in the interior of any building, and marble or granite columns shall not be used for the support of any wall over one story high. Within ten feet of any property or curb line in any basement or any walled embankment over 4' high, shall have the design in specifications( and if required by the building inspec- tor strain sheets and calculations) placed on file ~th the build- ing inspector and approved by him before any constru~ion shall commence. A permit for this work shall be issued and charged for in the same manner as the building permit. Basement or foundation walls and piers must have footings of concrete or be built of other approved masonry laid up in cement mortar, proportioned to the sustaining value of the soil, and the load to be imposed thereon. Such footings shall be not less than 75 per cent wider than the walls which they carry, unless otherwise provided for in this Ordinance. Filler walls and light courts and shafts must be as specified under Class A construction. In Class "A" buildings shall be constructed of masonry of a thickness and supported as required for other masonry walls, but if built of skeleton construction, such walls shall have a minimum thickness of 6 inches of masonry and 3 inches for re- inforced concrete, and openings into such light shafts shall be equipped with standard fire doors ~nd shutters or with wire glass and metal frame windows. In Class "B" buildings and C construction , the walls of all light courts and shafts whose ground area exceeds 25 feet shall be constructed the same as required for Class "A" buildings, excepting that the minimum thickness of the masonry may be reduced to 4 inches. For interior light shafts in Class "C" buildings , the walls may be fireproofed by covering with metal lath andplaster on the exposed side, if sheathed solidly behind such plaster with ?/$" sheathing. If not over three stories high, masonry light court walls may be carried either on a masonry wall or a steel or con- crete beam, and must be backed with stud and tight board sheathing if walls are built of tile. Light court walls of masonry when used in Class "B" or "C" construction and not resting on other masonry walls must be securely supported dlrectly underneath the wall by post and girder construction. The walls and piers of all buildings shall be ~roperly and solidly bonded tosether with close joints filled with mortar, and in no case shall any wall or walls of any building be carried up over one scaffold in advance of any other wall without the special permission of the building inspector. All brick walls shall be bonded every 7th course or less with full header courses. In walls faced with cut stone Terra Cotta, or any such material and where such facing shall not be considered as part of the wall, and the wall must be built full thickness without considering such facing. Flemish bond work shall have full. headers every third course. When face brick or Ashlar are tied to masonry walls with metallic wall ties, at least one metallic wall tie shall be used to each two square feet of wall surface. In estimating the thickness of wall required for any building when table No. 1 is used, stories must not be taken to exceed the following dimensions: 12 ft. for the basement and 16 ft. for the first story, and 12 ft. for upper stories excepting top story, which may be 16 ft. when no ceiling joists are used. When table No.2 is used, the clear height of stories shall not exceed ll ft. for the base- ment 14 ft. for the first story, and ll ft. for the upper stories except the top story, which may be 14 ft. to the roof timbers, when no ceiling joists are used. If any story exceed the foregoing heights, given in either table, walls of such story and the walls below that story shall be increased 4" in thickness.