9.17 Determine the largest capacity medium-duty dragline bucket that can be used on a dragline equipped...

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9.17 Determine the largest capacity medium-duty dragline bucket that can be used on a dragline equipped with 80 ft of boom when the boom is operating at an angle of 35 degrees. The excavated earth weights 98 lb/cf loose measure. For problem 9.17, please follow below steps: 1. Use table 9.12 to find safe capacity of dragline 2. Go to table 9.16 and follow below steps: a. Pick one size b. Consider its struck capacity c. Check its weight of bucket d. Calculate the weight of material which is material unit weight * struck capacity e. Check to see if total weight is less than safe weight 3. Redo step 2 to find the largest size of bucket 2222222 TABLE 9.17 Representative performance specifications for clamshell rigged crane Speeds Travel Swing Rated single-line speed Lift clamshell Dragline Magnet Third drum (standard travel) Third drum (independent travel) Rated line pulls (with standard engine) Lift clamshell Dragline Magnet Third drum 0.9 mph maximum 3 rpm maximum 166 fpm 157 fpm 200 fpm 185 fpm 127 fpm 29,600 lb SLP 31,400 lb SLP 24,800 lb SLP 25,500 lb SLP alors Performance figures are based on machine equipped with standard engine. SLP stands for Single Line Pull or 1-part line. 288 Construction Planning, Equipment, and Methods TABLE 9.12 Typical working ranges for cranes with maximum counterweights and rigged for dragline work J, boom length 50 ft Capacity (lb)* K, boom angle (degrees) A, dumping radius (ft) B, dumping height (ft) C, max. digging depth (ft) J, boom length 60 ft: Capacity (lb)* K, boom angle (degrees), A, dumping radius (ft) B, dumping height (ft) C, max. digging depth (ft) J, boom length 70 ft Capacity (lb)* K, boom angle (degrees) A, dumping radius (ft) B, dumping height (ft) C, max. digging depth (ft) J, boom length 80 ft Capacity (lb)* K, boom angle (degrees) A, dumping radius (ft) 12,000 12,000 20 25 55 50 10 14 40 36 ខ្លួនខគ - ខ្លួននគទ 6,000 20 86 22 11,000 25 60 18 36 8,500 25 73 23 36 6,700 12,000 12,000 30 50 18 32 B, dumping height (ft) C, max. digging depth (ft) D, digging reach *Combined weight of bucket and material must not exceed capacity. 11,800 30 55 22 32 9,200 30 70 28 32 7,200 30 79 33 32 35 45 22 28 12,000 35 55 26 28 12,000 44220 45 12,000. 40 52 31 24 11,000 40 60 37 24 8,600 40 70 42 24 25 81 27 40 36 Depends on working conditions and operator's skill with bucket 12,000 84478 45 9,800 45 65 47 20 40 27 20 12,000 45 50 35 20 11,800 45 55 42 20 TABLE 9.16 Representative capacities, weights, and dimensions of dragline buckets Dimensions (in.) Struck Size capacity (cy) (cf) w NAWNA 2/1/ 23/ 11 17 24 32 39 47 53 60 67 74 82 90 Weight of bucket (lb) Heavy duty Light Medium duty duty 760 880 1,275 1,460 1,640 1,850 2,220 2,945 2,410 3,300 3,010 3,750 3,375 4,030 3,925 4,825 4,100 5,350 4,310 5,675 4,950 6,225 5,560 6,660 2,100 2,875 3,700 4,260 4,525 4,800 5,400 6,250 6,540 7,390 7,920 Length 35 40 45 48 49 53 54 54 56 61 63 65 Width Height 20 23 25 27 31 32 36 38 39 40 41 43 8888 £ £ £ £ £ 80 28 36 41 45 45 48 48 51 53 53 55 55 9.17 Determine the largest capacity medium-duty dragline bucket that can be used on a dragline equipped with 80 ft of boom when the boom is operating at an angle of 35 degrees. The excavated earth weights 98 lb/cf loose measure. For problem 9.17, please follow below steps: 1. Use table 9.12 to find safe capacity of dragline 2. Go to table 9.16 and follow below steps: a. Pick one size b. Consider its struck capacity c. Check its weight of bucket d. Calculate the weight of material which is material unit weight * struck capacity e. Check to see if total weight is less than safe weight 3. Redo step 2 to find the largest size of bucket 2222222 TABLE 9.17 Representative performance specifications for clamshell rigged crane Speeds Travel Swing Rated single-line speed Lift clamshell Dragline Magnet Third drum (standard travel) Third drum (independent travel) Rated line pulls (with standard engine) Lift clamshell Dragline Magnet Third drum 0.9 mph maximum 3 rpm maximum 166 fpm 157 fpm 200 fpm 185 fpm 127 fpm 29,600 lb SLP 31,400 lb SLP 24,800 lb SLP 25,500 lb SLP alors Performance figures are based on machine equipped with standard engine. SLP stands for Single Line Pull or 1-part line. 288 Construction Planning, Equipment, and Methods TABLE 9.12 Typical working ranges for cranes with maximum counterweights and rigged for dragline work J, boom length 50 ft Capacity (lb)* K, boom angle (degrees) A, dumping radius (ft) B, dumping height (ft) C, max. digging depth (ft) J, boom length 60 ft: Capacity (lb)* K, boom angle (degrees), A, dumping radius (ft) B, dumping height (ft) C, max. digging depth (ft) J, boom length 70 ft Capacity (lb)* K, boom angle (degrees) A, dumping radius (ft) B, dumping height (ft) C, max. digging depth (ft) J, boom length 80 ft Capacity (lb)* K, boom angle (degrees) A, dumping radius (ft) 12,000 12,000 20 25 55 50 10 14 40 36 ខ្លួនខគ - ខ្លួននគទ 6,000 20 86 22 11,000 25 60 18 36 8,500 25 73 23 36 6,700 12,000 12,000 30 50 18 32 B, dumping height (ft) C, max. digging depth (ft) D, digging reach *Combined weight of bucket and material must not exceed capacity. 11,800 30 55 22 32 9,200 30 70 28 32 7,200 30 79 33 32 35 45 22 28 12,000 35 55 26 28 12,000 44220 45 12,000. 40 52 31 24 11,000 40 60 37 24 8,600 40 70 42 24 25 81 27 40 36 Depends on working conditions and operator's skill with bucket 12,000 84478 45 9,800 45 65 47 20 40 27 20 12,000 45 50 35 20 11,800 45 55 42 20 TABLE 9.16 Representative capacities, weights, and dimensions of dragline buckets Dimensions (in.) Struck Size capacity (cy) (cf) w NAWNA 2/1/ 23/ 11 17 24 32 39 47 53 60 67 74 82 90 Weight of bucket (lb) Heavy duty Light Medium duty duty 760 880 1,275 1,460 1,640 1,850 2,220 2,945 2,410 3,300 3,010 3,750 3,375 4,030 3,925 4,825 4,100 5,350 4,310 5,675 4,950 6,225 5,560 6,660 2,100 2,875 3,700 4,260 4,525 4,800 5,400 6,250 6,540 7,390 7,920 Length 35 40 45 48 49 53 54 54 56 61 63 65 Width Height 20 23 25 27 31 32 36 38 39 40 41 43 8888 £ £ £ £ £ 80 28 36 41 45 45 48 48 51 53 53 55 55