1927 086 Ordinance - Laserfiche WebLink

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inches center to center, made from shale clay ancl burned to a degree of hardness suf- ficient to secure a block which ivill not exceed 12 per cent in absorption, may be loa- ded not more thari 200 pounds per sq. ino of available or effective vertical tiveb sec-: _ tio4 and may be used in all walls above -foundation, except fire walls. Portland building bloeks used for outside walls and partitions shall not be 1 oaded to more than 150 pounds per sq. ine of available or effective section. I• Sec.98. I,ENGTHS 0F COI,UIMS. POSTS AND PIERS. In any free standing o r built in column, pier or post'the'ratio Of tp?E unsupport'ed length to the width or diameter of the member shall- not exceed the-following: • Briclc -Piers.,o-., .. ...•... o .. . . .: .......... o . . .. . . . -. . o : . . .... . . . . . . .. . . . . s .-..... 8 : 1 Block Stone Piers..............................a........................o... 10:1 Wooden Posts. a a ..•.'.'. O'e's'o ???-m• .*...-.•...,..•........ o o. . . 4 ... . . :.....:.. :.'........ , 24:1 Cast Iron Colwnns. ...............s........................................... 30:1 Ste@'1- COZUIlIYLB,,,o i*,*e ,'s"..'.',,e",'.",,.',,,'.,'o',','.'.`,',',','O`. e'•'?'?'?'?'?'a'?'? ?"? ?'?'?'?'?'?'? ? ? ? ? 9'. o 0 0'0 a a o • .44i 1 Reinforced Concrete Columns................o ................................ 12;1 Sec.99. SIZE3 OF COLUii+MS, POSTS AND PIERS. tiVhen used as principal supports for walls or floor construction, the cast iron columns must have shells not less than 3/4 inch thick. V'Irought iron' or steel built' up colunms must have athickn.ess of not le s s t han -- inch i n- all- theii part s•. - - • • • - • • • ° - - • Sec.100. LOADS OlT.F0UITDATIONS. The footings of all buildinga shall be propor- tioned to sustain all the accumtiilated "dead loads°t and the following proportions of the live loads tra.nsmitted to them as follows: For liae loads transmitted through walls or through colwnns built in or an- chored 'to walls; - - • -- 75 per cent of a live-loai3 of 100 pounds per square foot and upwards. 50 per cent of.a live load of 40 to 100 pounds per square foot. For live load.s transmitted through free standing 'eolumns a,nd piers; 90 per cent of a live lottd of 150-pounds per square f oot and upwarda. 85 per cent of a live load of 100 to150 pounds per square foot.:, 80 per eent`of a live`load of 80 to 100 pounds per square"foot. 75 per cent of a live load of 60 to 80 pounds per square foot. 70 per cent of a live load-of- 40 to- 60•pounds per square foot. Sec.101. 3'he foundations are to be designed to provide as uniform as possi- ble-a'distribution of the load over the.underlying areas determinedby the above ta- ble 'and by' the safe loads on'various, soils as .provided-.,in Title: III, Section 96e - TITZE IV. - EXCAVATIGPTS AItiTD 'FOUNDATIONS. 'Sectiori. 102o PROTECTIONs All excavations? shall be so• protected by theLoivnes making or causir,g them' to be 'made that adj oining soil shall- not cave,in by reason - of its own weight, and shall be properly guarded and protected so as•t0-prevent the sa.me from becoming dargerous to life and limb. Permanent excavations'?are- to 'be' protected by reta.ining,walls with guard rails or fences.