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<br />Table 8, Acceptable subsidence effects <br />• <br />Horizontal Vertical <br />Strain (.! ) Strain (-E ). <br />1000 1000 <br />1500 1500 <br />3000 3000 <br />6000 6000 <br />9000 ~ 9000 <br />500 to 1000 500 to 1000 <br />1000 to 2000 1000~to. 2000 <br />Tilt (-.) <br />Tan-. .c (') <br />0.0010 3.43 <br />0.0025 8.58' <br />0.0050 17.18' <br />O.OI00 ~ 34.36' <br />0.0150 51.57' <br />1000 ~ 1000 <br />2500 to 4000 2500 to 4000 <br />3000 3000 <br />5000 5000 <br />0.004 13.75 <br />0.010 34.37' <br />Comments and <br />References <br />"tolerable level <br />of strain likely <br />to be on the order <br />of"---for shaft (1) <br />Polish Catego ry I (2) <br />Polish Category II (2) <br />Polish Category III (2) <br />polish Category N (21 <br />High continuous <br />brick walls (3) <br />One-story brick <br />mill (3I ' <br />building, wall <br />cracking <br />Plaster cracking <br />(gypsum) (3) <br />Reinforced-eonc rece <br />(3) <br />building frame <br />Reinforced-concrete <br />(3) <br />curtain :+alls <br />Steel frame, (3) <br />continuous simple <br />steel frame <br />Tilting of smoke- <br />stacks (3) <br />towers <br />Rolling of tracts, <br />(3) <br />stacking of goods <br />• <br />