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I <br />Knight Piesold <br />CONSYLTINO <br />18 <br />Table 506-2 <br />Pa Item % of Material Typical Stone Typical Stone <br /> Stone Size d50 Smaller than Dimensions3 Weight4 <br /> inches Typical Stone2 (inches) (pounds) <br /> 70-100 12 85 <br />Riprap 6 50-70 9 35 <br /> 35-50 6 10 <br /> 2-10 2 0.4 <br /> 70-100 IS 160 <br /> 50-70 12 85 <br />Riprap 9 35-50 9 35 <br /> 2-10 3 1.3 <br /> 70-100 21 440 <br />Riprap 12 50-70 18 275 <br /> 35-50 12 85 <br /> 2-10 4 3 <br /> 70-100 30 1280 <br />Riprap 18 50-70 24 650 <br /> 35-50 18 275 <br /> 2-10 6 10 <br /> 100 42 3500 <br />Riprap 24 0-70 33 1700 <br /> 35-40 24 650 <br /> 2-10 9 35 <br />1. d50 =nominal stone size <br />2. Based on typical rock mass <br />3. Equivalent spherical diameter <br />4. Based on a specific gravity = 2.5 <br />19 <br />20 Nominal stone size and total thickness of the riprap shall be as shown on the plans. Control of <br />21 gradation will be by visual inspection. The Contractor shall provide two samples of rock at least <br />22 5 tons each, meeting the gradation specified. One sample shall be provided at the construction <br />23 site and may be a part of the finished riprap covering. The other sample shall be provided at the <br />24 quarry. These samples will be used as a reference for judging the gradation of the riprap <br />25 supplied. When it is determined necessary, conformance of the gradation will be verified by <br />26 dumping and checking the gradation of two random truck loads of stone. Mechanical equipment, <br />27 a sorting site, and labor needed to assist in checking gradation shall be provided at the <br />28 Contractor's expense. <br />29 <br />30 506.03 Construction Requirements. Stones with typical stone dimensions that are equal to <br />31 d50 and larger shall be placed at the top surface with faces and shapes matched to minimize <br />32 voids and form as smooth a surface as practical. Dumping and backhoe placement alone is not <br />33 sufficient to ensure a properly interlocked system. The material may be machine-placed and then <br />34 arranged as necessary by use of gradall with multi-prong gapple device or by hand to interlock - <br />3-27 <br />G:1101\W 100.02W\ReponslKPlTeNniwl Spedfralions Ooc FeEruary 3, 2006 <br />