Machinery's Handbook, 31st Edition
380 Weight of Piles For B / A = 5⁄10 = 0.5, R = 0.39789 from Table 19a. Using Equation (2), for M = 4.58, the lower limit W = 4.58 3 0.39789 3 10 3 = 1,822 lb. For M = 5.89, the upper limit W = 5.89 3 0.39789 3 10 3 = 2,344lb. Example: What is the weight of a pile of cast iron chips resting on a rectangular plate 4 m by 2 m? For B / A = 2⁄4, R = 0.39789 from Table 19a. Using Equation (2), for M = 17.02, the lower limit W = 17.02 3 0.39789 3 4 3 = 433 kg. For M = 26.18, the upper limit W = 26.18 3 0.39789 3 4 3 = 667 kg. Table 19a. Factor R as a Function of B / A ( B ≤ A ) B / A R B / A R B / A R B / A R B / A R B / A R 0.01 0.00019 0.18 0.05817 0.35 0.20666 0.52 0.42691 0.69 0.70015 0.86 1.00761 0.02 0.00076 0.19 0.06458 0.36 0.21782 0.53 0.44170 0.70 0.71747 0.87 1.02636 0.03 0.00170 0.20 0.07130 0.37 0.22921 0.54 0.45667 0.71 0.73491 0.88 1.04516 0.04 0.00302 0.21 0.07833 0.38 0.24085 0.55 0.47182 0.72 0.75245 0.89 1.06400 0.05 0.00470 0.22 0.08566 0.39 0.25273 0.56 0.48713 0.73 0.77011 0.90 1.08289 0.06 0.00674 0.23 0.09329 0.40 0.26483 0.57 0.50262 0.74 0.78787 0.91 1.10182 0.07 0.00914 0.24 0.10121 0.41 0.27717 0.58 0.51826 0.75 0.80572 0.92 1.12078 0.08 0.01190 0.25 0.10942 0.42 0.28973 0.59 0.53407 0.76 0.82367 0.93 1.13977 0.09 0.01501 0.26 0.11792 0.43 0.30252 0.60 0.55004 0.77 0.84172 0.94 1.15879 0.10 0.01846 0.27 0.12670 0.44 0.31552 0.61 0.56616 0.78 0.85985 0.95 1.17783 0.11 0.02226 0.28 0.13576 0.45 0.32873 0.62 0.58243 0.79 0.87807 0.96 1.19689 0.12 0.02640 0.29 0.14509 0.46 0.34216 0.63 0.59884 0.80 0.89636 0.97 1.21596 0.13 0.03088 0.30 0.15470 0.47 0.35579 0.64 0.61539 0.81 0.91473 0.98 1.23505 0.14 0.03569 0.31 0.16457 0.48 0.36963 0.65 0.63208 0.82 0.93318 0.99 1.25414 0.15 0.04082 0.32 0.17471 0.49 0.38366 0.66 0.64891 0.83 0.95169 1.00 1.27324 0.16 0.04628 0.33 0.18511 0.50 0.39789 0.67 0.66586 0.84 0.97027 … … 0.17 0.05207 0.34 0.19576 0.51 0.41231 0.68 0.68295 0.85 0.98891 … … Table 19b. Limits of Factor M for Various Materials Material Factor M Material Factor M Material Factor M Almonds, whole 2.12–3.93 Coffee, ground 1.89–3.27 Peanuts, unshelled 1.13–3.14 Aluminum chips 0.92–1.96 Coke, pulverized 2.21 Peanuts, shelled 2.65–5.89 Aluminum silicate 3.7–6.41 Copper oxide, powdered 20.87 Peas, dry 2.75–3.05 Ammonium chloride 3.93–6.81 Cork, granulated 1.57–1.96 Potassium carbonate 3.85–6.68 Asbestos, shredded 2.62–3.27 Corn on cob 1.29–1.33 Potassium sulphate 5.5–6.28 Ashes, dry 4.58–5.89 Corn sugar 2.34–4.06 Pumice 5.24–5.89 Ashes, damp 6.24–7.80 Cottonseed, dry, de-linted 1.66–5.24 Rice, bran 1.51–2.75 Asphalt, crushed 3.4–5.89 Diatomaceous earth 0.83–1.83 Rubber, scrap, ground 2.11–4.58 Bakelite, powdered 3.93–5.24 Dicalcium phosphate 5.63 Salt, dry, coarse 3.02–8.38 Baking powder 3.1–5.37 Ebonite, crushed 4.91–9.16 Salt, dry, fine 5.29–10.47 Barium carbonate 9.42 Epsom salts 3.02–6.54 Saltpeter 6.05–10.47 Bauxite, mine run 5.9–6.69 Feldspar, ground 8.51–9.16 Salt rock, crushed 4.58 Beans, navy, dry 3.63 Fish scrap 5.24–6.54 Sand, very fine 7.36–9 Beets, sugar, shredded 0.47–0.55 Flour 5.61–10.43 Sawdust, dry 0.95–2.85 Bicarbonate of soda 3.10 Flue dust 2.65–3.40 Sesame seed 2.04–4.84 Borax 3.78–9.16 Fluorspar (Fluorite) 10.73–14.40 Shellac, powdered 2.34–4.06 Boric acid 4.16–7.20 Graphite, flake 3.02–5.24 Slag, furnace, granular 4.53–8.51 Bronze chips 3.93–6.54 Gravel 6.8–13.18 Soap powder 1.51–3.27 Buckwheat 2.8–3.17 Gypsum, calcined 6.04–6.59 Sodium nitrate 3.96–4.66 Calcium lactate 3.4–3.8 Hominy 2.8–6.54 Sodium sulphite 10.54 Calcium oxide (lime) 3.30 Hops, dry 4.58 Sodium sulphate 6.92 Carbon, ground 2.51 Kaolin clay 12.32–21.34 Soybeans 3.48–6.28 Casein 2.72–4.71 Lead silicate, granulated 25.26 Steel chips, crushed 7.56–19.63 Cashew nuts 4.19–4.84 Lead sulphate, pulverized 24.09 Sugar, refined 3.78–7.2 Cast iron chips 17.02–26.18 Lime, ground 7.85 Sulphur 4.5–6.95 Cement, Portland 6.8–13.09 Limestone, crushed 6.42–11.78 Talcum powder 4.37–5.9 Cinders, coal 3.02–5.24 Magnesium chloride 4.32 Tin oxide, ground 9.17 Clay, blended for tile 5.89 Malt, dry, ground 1.66–2.88 Tobacco stems 1.96–3.27 Coal, anthracite, chestnut 2.43 Manganese sulphate 5.29–9.16 Trisodium phosphate 4.53–7.85 Coal, bituminous, sized 2.64–4.48 Marble, crushed 6.8–12.44 Walnut shells, crushed 2.65–5.24 Coal, ground 2.90 Mica, ground 1.24–1.43 Wood chips, fir 2.49–2.88 Cocoa, powdered 3.93–4.58 Milk, whole, powdered 2.62 Zinc sulphate 8.85–11.12 Coconut, shredded 2.62–2.88 Oats 1.74–2.86 … … Coffee beans 2.42–5.89 Orange peel, dry 1.96 … …
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