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i <br /> t <br /> thickness as to safely resist the superimposed load without <br /> exceeding at any point the allowable bearing capacity of the <br /> soil. <br /> Para. 5. Foundations. 1. All foundations shall be of <br /> such width and thickness as to safely resist the superimposed <br /> load without exceeding the allowable working strength, and <br /> can be of concrete, brick or stone. Minimum requirements <br /> shall be as follows: (a) Six inch thickness for poured con- <br /> crete supporting one story wood frame structure without <br /> basement. (b) Eight inch thickness for all other poured <br /> walls. (c) Eight inch thickness for -all masonry unit walls <br /> that extend up to eight feet below finished grade. Maximum <br /> total height of foundation wall supported to be not more <br /> than thirty feet to eaves .and thirty-five feet to ridge.' (d) <br /> Twelve inch thickness for all masonry unit walls that extend <br /> more than eight feet below outside finish grade. <br /> One story frame buildings, not intended for human habi- <br /> tation, may be built on cement piers provided that the dis- <br /> tance between piers is within the limits of the maximum <br /> spans for wood girders. <br /> Para. 6. Piers for Girders. 1. First floor girders must <br /> rest on solid masonry or cement filled steel columns. 2. On <br /> block foundations, cells of blocks below girder must be filled <br /> with cement to form solid bearing, or 3. Masonry pilasters <br /> not less than four inches by eight inches shall be built to <br /> receive girder ends, or cement filled steel columns may be <br /> used. <br /> Para. 7. All areas under buildings must be accessible <br /> r <br /> with a minimum clearance of 20 inches and be ventilated in <br /> two exterior walls. `~` <br /> Para. 8. No wooden structural member shall be closer <br /> than one inch to the chimney, and whenever wooden forms <br /> or supports .are used in the construction of chimneys or fire- <br /> places, they shall be removed within two weeks after masonry <br /> is laid. <br /> Para. 9. Sizing and spacing of girders shall be in ac- <br /> cordance with Tables I, II, III, and IV appended. <br /> i <br /> Para. 10. Wood Floor Joists. 1. Where joists frame in- <br /> to side of wood girders, metal hangers or a bearing strip <br /> spiked to the girder must be used. 2. Floor joists framed'.into <br /> masonry walls shall have at least a four inch bearing and a <br /> three inch fire bevel cut. 3. Floor joists shall be doubled <br /> under all partitions running parallel to the floor joists. 4. �. <br /> All headers over four feet long shall be doubled. 5. Floor <br /> joists shall be cross bridged when span exceeds eight feet. <br /> At least one by three inch or stronger stock shall be used. <br /> 24 <br /> h <br /> I <br /> I <br /> I <br /> li <br />