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<br />STONE WEIGHT, IN POUNDS <br />20 60 600 1000 1500 3000 5000 <br />1 5 10 I 40 I 100 200 400 I 800 I I 2000 I 4000 I <br /> <br /> . <br />12:1or <br />bollom <br />4:1 <br />3:1 <br />2:1 <br /> . <br />1~2:1 <br /> . <br />1:1 <br /> <br />26 <br /> <br />6 <br /> <br /> <br />. <br /> <br />24 <br /> <br />22 <br /> <br />20 <br /> <br />Cl 18 <br />z <br />o <br />U <br />l1J <br />l/l 16 <br />lr <br />l1J <br />Q. <br />I- 14 <br />l1J <br />l1J <br />... <br />Z <br /> <br />~ <br />~ <br /> <br />12 <br /> <br />>- <br />I- 10 <br />u <br />o <br />.J <br />l1J <br />> 8 <br /> <br />FOR STONE WEIGHING , <br />165 LBS. PER CU. FT. <br /> <br />4 <br /> <br />ADAPTED FROM REPORT OF <br />SUBCOMMlTTE ON SLOPE <br />PROTECTION, AM. SOC. CIVIL <br />ENGINEERS PROC. JUNE 1948 <br /> <br />. <br /> <br />2 <br /> <br />'" <br /> <br />o <br />o <br />EQUIVALENT <br /> <br />I 2 . 3 4 <br />SPHERICAL DIAMETER OF STONE, IN FEET <br /> <br />nG. 2-SIZE OF STONE THAT WILL RESIST DISPLACEMENT <br />FOR VARIOUS VELOcITIES AND SIDE SLOPES <br /> <br />. <br /> <br />11-6 <br />