Mechanical Estimating Manual Episode 9 ppsx

148 Mechanical Estimating Manual Low Pressure Spiral Ductwork Shop Hours Straight Hours Per Foot; Fittings Hours Per Piece Manual Fabrication ————————————————————————————————————————————— 45 Elbw 90 Elbw Miters Cross Offset Reducer RdLat Diameter Straight Wye Tap 90T Lat 90RdT Sq/Rnd LatCross ————————————————————————————————————————————— 4” 0.007 1.29 0.67 1.42 1.51 2.25 2.38 2.55 5” 0.007 1.46 0.78 1.45 1.54 2.30 2.47 2.55 6” 0.007 1.67 0.86 1.47 1.56 2.35 2.55 2.55 7” 0.153 1.81 0.95 1.50 1.59 2.39 2.64 2.55 ————————————————————————————————————————————— 8” 0.008 2.05 1.05 1.53 1.62 2.43 2.72 2.55 9” 0.009 2.24 1.12 1.56 1.75 2.47 2.81 2.72 10” 0.009 2.42 1.23 1.59 1.81 2.52 2.89 2.83 12” 0.010 2.81 1.42 1.64 1.99 2.86 3.09 3.15 ————————————————————————————————————————————— 14” 0.012 3.18 1.61 1.92 2.17 3.14 3.30 3.45 16” 0.013 3.56. 1.79 2.10 2.35 3.41 3.50 3.77 18” 0.014 3.72 2.16 2.28 2.53 3.68 3.72 4.09 20” 0.016 4.75 2.38 2.46 2.71 3.95 3.91 4.39 ————————————————————————————————————————————— 22” 0.018 5.80 2.69 2.59 2.97 4.22 4.17 4.75 24” 0.020 6.16 3.06 2.81 3.21 4.49 4.33 5.02 26” 0.020 7.07 3.35 2.95 3.62 5.08 4.52 5.72 28” 0.022 8.04 3.86 3.47 4.14 5.68 4.82 6.39 ————————————————————————————————————————————— 30” 0.025 8.16 4.20 3.91 4.31 6.23 4.94 7.02 32” 0.026 8.41 4.45 4.35 4.80 6.94 5.13 7.64 34” 0.028 8.98 4.56 4.79 5.31 7.67 5.33 8.26 36” 0.029 9.52 4.74 5.24 5.78 8.35 5.55 8.89 ————————————————————————————————————————————— 38” 0.031 9.92 5.01 5.47 6.08 8.72 5.73 9.51 40” 0.032 10.31 5.20 6.56 6.38 9.10 5.95 10.13 42” 0.034 10.88 5.29 5.96 6.68 9.48 6.16 10.75 44” 0.036 11.39 5.40 6.20 6.98 9.85 6.39 11.27 ————————————————————————————————————————————— 46” 0.037 11.73 5.64 6.43 7.28 10.23 6.60 11.79 48” 0.039 12.24 5.84 6.68 7.58 10.61 6.77 12.31 50” 0.041 12.58 5.87 6.92 7.88 10.98 7.01 12.78 52” 0.043 12.75 6.16 7.16. 8.18 11.36 7.18 13.24 ————————————————————————————————————————————— 54” 0.044 12.92 6.38 7.40 8.48 11.74 7.39 13.71 56” 0.046 13.09 6.52 7.64 8.78 12.11 7.56 14.18 58” 0.048 13.43 6.78 7.88 9.08 12.49 7.86 14.65 60” 0.049 13,60 6.93 8.13 9.38 12.87 8.00 15.11 ————————————————————————————————————————————— Spiral and Light Gauge Round Ductwork 149 Low Pressure Spiral Ductwork Shop Hours Straight Hours Per Foot; Fittings Hours Per Piece Automated Fabrication ————————————————————————————————————————————— 45 Elbw 90 Elbw Miters Cross Offset Reducer RdLat Diameter Straight Wye Tap 90T Lat 90RdT Sq/Rnd LatCross ————————————————————————————————————————————— 4” 0.008 0.91 0.47 1.00 1.07 1.70 1.79 1.92 5” 0.008 1.03 0.55 1.02 1.09 1.73 1.86 1.92 6” 0.008 1.18 0.61 1.04 1.10 1.77 1.92 1.92 7” 0.180 1.28 0.67 1.06 1.12 1.80 1.98 1.92 ————————————————————————————————————————————— 8” 0.009 1.45 0.74 1.08 1.14 1.83 2.05 1.92 9” 0.010 1.58 0.79 1.10 1.24 1.86 2.11 2.05 10” 0.011 1.71 0.87 1.12 1.28 1.90 2.18 2.13 12” 0.012 1.98 1.00 1.16 1.40 2.16 2.33 2.37 ————————————————————————————————————————————— 14” 0.014 2.24 1.13 1.36 1.53 2.36 2.48 2.60 16” 0.015 2.51 1.27 1.48 1.66 2.57 2.64 2.84 18” 0.017 2.63 1.52 1.61 1.79 2.77 2.80 3.08 20” 0.019 3.35 1.68 1.73 1.91 2.98 2.94 3.31 ————————————————————————————————————————————— 22” 0.021 4.09 1.90 1.83 2.09 3.17 3.14 3.58 24” 0.023 4.35 2.16 1.99 2.27 3.38 3.26 3.78 26” 0.024 4.99 2.36 2.08 2.56 3.83 3.40 4.31 28” 0.026 5.68 2.72 2.45 2.92 4.28 3.63 4.81 ————————————————————————————————————————————— 30” 0.029 5.76 2.96 2.76 3.04 4.69 3.72 5.29 32” 0.031 5.93 3.14 3.07 3.39 5.22 3.87 5.75 34” 0.033 6.34 3.22 75.00 3.75 5.77 4.01 6.22 36” 0.034 6.72 3.35 3.70 4.08 6.28 4.18 6.69 ————————————————————————————————————————————— 38” 0.036 7.00 3.53 3.86 4.29 6.57 4.31 7.16 40” 0.038 7.28 3.67 4.63 4.50 6.85 4.48 7.63 42” 0.040 7.68 3.73 4.21 4.72 7.14 4.64 8.10 44” 0.042 8.04 3.81 4.37 4.93 7.42 4.81 8.49 ————————————————————————————————————————————— 46” 0.044 8.28 3.98 4.54 5.14 7.70 4.97 8.88 48” 0.046 8.64 4.12 4.72 5.35 7.99 5.10 9.27 50” 0.048 8.88 4.14 4.88 5.56 8.27 5.28 9.62 52” 0.050 9.00 4.35 5.05 5.77 8.55 5.41 9.97 ————————————————————————————————————————————— 54” 0.052 9.12 4.51 5.23 5.99 8.84 5.56 10.32 56” 0.054 9.24 4.60 5.39 6.20 9.12 5.69 10.68 58” 0.056 9.48 4.79 5.56 6.41 9.40 5.92 11.03 60” 0.058 9.60 4.89 5.74 62 9.69 6.02 11.38 ————————————————————————————————————————————— 150 Mechanical Estimating Manual Low Pressure Spiral Ductwork Field Hours Straight Hours Per Foot; Fittings Hours Per Piece ————————————————————————————————————————————— 90 Elbw 45 Elbw Reducer 90T Wye Miters Offset LatCross Diameter Straight Cross 90RdT Lat RdLat Sq/Rd Tap Flex Tube ————————————————————————————————————————————— 4” 0.054 0.32 0.32 0.32 0.32 0.32 0.20 0.060 5” 0.063 0.36 0.36 0.36 0.36 0.36 0.20 0.070 6” 0.072 0.41 0.41 0.41 0.41 0.41 0.20 0.080 7” 0.072 0.45 0.45 0.45 0.45 0.45 0.20 0.090 ————————————————————————————————————————————— 8” 0.081 0.50 0.50 0.50 0.50 0.50 0.20 0.100 9” 0.090 0.00 0.00 0.00 0.00 0.00 0.20 0.110 10” 0.099 0.59 0.59 0.59 0.59 0.59 0.20 0.120 12” 0.117 0.59 0.59 0.68 0.68 0.68 0.20 0.140 ————————————————————————————————————————————— 14” 0.126 0.76 0.76 0.58 0.58 0.58 0.27 0.160 16” 0.135 0.93 0.93 0.71 0.71 0.71 0.34 0.180 18” 0.153 1.11 1.11 0.85 0.85 0.85 0.41 0.190 20” 0.162 1.28 1.28 0.97 0.97 0.97 0.49 0.200 ————————————————————————————————————————————— 22” 0.180 1.45 1.45 1.11 1.11 1.11 0.56 0.230 24” 0.198 1.62 1.62 1.23 1.23 1.23 0.62 0.260 26” 0.216 1.79 1.79 1.37 1.37 1.37 0.69 0.000 28” 0.234 1.96 1.96 1.50 1.50 1.50 0.77 0.000 ————————————————————————————————————————————— 30” 0.261 2.14 2.14 1.63 1.63 1.63 0.84 0.000 32” 0.261 2.31 2.31 1.76 1.76 1.76 0.91 0.000 34” 0.288 2.48 2.48 1.90 1.90 1.90 0.98 0.000 36” 0.306 2.66 2.66 2.03 2.03 2.03 1.04 0.000 ————————————————————————————————————————————— 38” 0.324 2.83 2.83 2.15 2.15 2.15 1.12 0.000 40” 0.333 3.00 3.00 2.28 2.28 2.28 1.19 0.000 42” 0.342 3.18 3.18 2.41 2.41 2.41 1.25 0.000 44” 0.351 3.35 3.35 2.55 2.55 2.55 1.32 0.000 ————————————————————————————————————————————— 46” 0.369 3.52 3.52 2.68 2.68 2.68 1.40 0.000 48” 0.378 3.69 3.69 2.81 2.81 2.81 1.47 0.000 50” 0.396 3.86 3.86 2.93 2.93 2.93 1.54 0.000 52” 0.414 4.03 4.03 3.06 3.06 3.06 1.61 0.000 ————————————————————————————————————————————— 54” 0.423 4.21 4.21 3.20 3.20 3.20 1.67 0.000 56” 0.432 4.38 4.38 3.34 3.34 3.34 1.75 0.000 58” 0.441 4.55 4.55 3.47 3.47 3.47 1.82 0.000 60” 0.450 4.73 4.73 3.60 3.60 3.60 1.89 0.000 ————————————————————————————————————————————— Spiral and Light Gauge Round Ductwork 151 Medium Pressure Spiral Ductwork Shop Hours Straight Hours Per Foot; Fittings Hours Per Piece Manual Fabrication ————————————————————————————————————————————— 45 Elbw 90 Elbw Miters Cross Offset Reducer RdLat Diameter Straight Wye Tap 90T Lat 90RdT Sq/Rnd LatCross ————————————————————————————————————————————— 4” 0.008 1.52 0.79 1.67 1.78 2.65 1.80 3.00 5” 0.008 1.72 0.92 1.70 1.81 2.70 2.90 3.00 6” 0.008 1.96 1.01 1.73 1.84 2.76 3.00 3.00 7” 0.080 2.13 1.12 1.77 1.87 2.80 3.10 3.00 ————————————————————————————————————————————— 8” 0.009 2.41 1.23 1.80 1.90 2.86 3.20 3.00 9” 0.010 2.63 1.32 1.84 2.06 2.91 3.30 3.20 10” 0.011 2.85 1.45 1.87 2.13 2.97 3.40 3.33 12” 0.012 3.30 1.67 1.93 2.34 3.37 3.64 3.70 ————————————————————————————————————————————— 14” 0.014 3.74 1.89 2.26 2.55 3.69 3.88 4.06 16” 0.015 4.19 2.11 2.47 2.76 4.01 4.12 4.43 18” 0.017 4.38 2.54 2.68 2.98 4.33 4.38 4.81 20” 0.019 5.59 2.80 2.89 3.19 4.65 4.60 5.17 ————————————————————————————————————————————— 22” 0.021 6.82 3.16 3.05 3.49 4.96 4.91 5.59 24” 0.023 7.25 3.60 3.31 3.78 5.28 5.09 5.91 26” 0.024 8.32 3.94 3.47 4.26 5.98 5.32 6.73 28” 0.026 9.46 4.54 4.08 4.87 6.68 5.67 7.52 ————————————————————————————————————————————— 30” 0.029 9.60 4.94 4.60 5.07 7.33 5.81 8.26 32” 0.031 9.89 5.24 5.12 5.65 8.16 6.04 8.99 34” 0.033 10.56 5.36 5.64 6.25 9.02 6.27 9.72 36” 0.034 11.20 5.58 6.16 6.80 9.82 6.53 10.46 ————————————————————————————————————————————— 38” 0.036 11.67 5.89 6.44 7.15 10.26 6.74 11.19 40” 0.038 12.13 6.12 7.72 7.50 10.70 7.00 11.92 42” 0.040 12.80 6.22 7.01 7.86 11.15 7.25 12.65 44” 0.042 13.40 6.35 7.29 8.21 11.59 7.52 13.26 ————————————————————————————————————————————— 46” 0.044 13.80 6.64 7.57 8.56 12.03 7.76 13.87 48” 0.046 14.40 6.87 7.86 8.92 12.48 7.97 14.48 50” 0.048 14.80 6.90 8.14 9.27 12.92 8.25 15.03 52” 0.050 15.00 7.25 8.42 9.62 13.36 8.45 15.58 ————————————————————————————————————————————— 54” 0.052 15.20 7.51 8.71 9.98 13.81 8.69 16.13 56” 0.054 15.40 7.67 8.99 10.33 14.25 8.89 16.68 58” 0.056 15.80 7.98 9.27 10.68 14.69 9.25 17.23 60” 0.058 16.00 8.15 9.56 11.04 15.14 9.41 17.78 ————————————————————————————————————————————— 152 Mechanical Estimating Manual Medium Pressure Spiral Ductwork Shop Hours Straight Hours Per Foot; Fittings Hours Per Piece Automated Fabrication ————————————————————————————————————————————— 45 Elbw 90 Elbw Miters Cross Offset Reducer RdLat Diameter Straight Wye Tap 90T Lat 90RdT Sq/Rnd LatCross ————————————————————————————————————————————— 4” 0.008 1.14 0.59 1.25 1.34 1.99 2.10 2.25 5” 0.008 1.29 0.69 1.28 1.36 2.03 2.18 2.25 6” 0.008 1.47 0.76 1.30 1.38 2.07 2.25 2.25 7” 0.180 1.60 0.84 1.33 1.40 2.11 2.33 2.25 ————————————————————————————————————————————— 8” 0.009 1.81 0.92 1.35 1.43 2.15 2.40 2.25 9” 0.010 1.97 0.99 1.38 1.55 2.18 2.48 2.40 10” 0.011 2.14 1.09 1.40 1.60 2.23 2.55 2.50 12” 0.012 2.48 1.25 1.45 1.76 2.53 2.73 2.78 ————————————————————————————————————————————— 14” 0.014 2.81 1.42 1.70 1.91 2.77 2.91 3.05 16” 0.015 3.14 1.58 1.85 2.07 3.01 3.09 3.32 18” 0.017 3.29 1.91 2.01 2.24 3.25 3.29 3.61 20” 0.019 4.19 2.10 2.17 2.39 3.49 3.45 3.88 ————————————————————————————————————————————— 22” 0.021 5.12 2.37 2.29 2.62 3.72 3.68 4.19 24” 0.023 5.44 2.70 2.48 2.84 3.96 3.82 4.43 26” 0.024 6.24 2.96 2.60 3.20 4.49 3.99 5.05 28” 0.026 7.10 3.41 3.06 3.65 5.01 4.25 5.64 ————————————————————————————————————————————— 30” 0.029 7.20 3.71 3.45 3.80 5.50 4.36 6.20 32” 0.031 7.42 3.93 3.84 4.24 6.12 4.53 6.74 34” 0.033 7.92 4.02 4.23 4.69 6.77 4.70 7.29 36” 0.034 8.40 4.19 4.62 5.10 7.37 4.90 7.85 ————————————————————————————————————————————— 38” 0.036 8.75 4.42 4.83 5.36 7.70 5.06 8.39 40” 0.038 9.10 4.59 5.79 5.63 8.03 5.25 8.94 42” 0.040 9.60 4.67 5.26 5.90 8.36 5.44 9.49 44” 0.042 10.05 4.76 5.47 6.16 8.69 5.64 9.95 ————————————————————————————————————————————— 46” 0.044 10.35 4.98 5.68 6.42 9.02 5.82 10.40 48” 0.046 10.80 5.15 5.90 6.69 9.36 5.98 10.86 50” 0.048 11.10 5.18 6.11 6.95 9.69 6.19 11.27 52” 0.050 11.25 5.44 6.32 7.22 10.02 6.34 11.69 ————————————————————————————————————————————— 54” 0.052 11.40 5.63 6.53 7.49 10.36 6.52 12.10 56” 0.054 11.55 5.75 6.74 7.75 10.69 6.67 12.51 58” 0.056 11.85 5.99 6.95 8.01 11.02 6.94 12.92 60” 0.058 12.00 6.11 7.17 8.28 11.36 7.06 13.34 ————————————————————————————————————————————— Spiral and Light Gauge Round Ductwork 153 Medium Pressure Spiral Ductwork Field Hours Straight Hours Per Foot; Fittings Hours Per Piece ————————————————————————————————————————————— 90 Elbw 45 Elbw Reducer 90T Wye Miters Offset LatCross Diameter Straight Cross 90RdT Lat RdLat Sq/Rd Tap Flex Tube ————————————————————————————————————————————— 4” 0.060 0.35 0.35 0.35 0.35 0.35 0.22 0.060 5” 0.070 0.40 0.40 0.40 0.40 0.40 0.22 0.070 6” 0.080 0.45 0.45 0.45 0.45 0.45 0.22 0.080 7” 0.080 0.50 0.50 0.50 0.50 0.50 0.22 0.090 ————————————————————————————————————————————— 8” 0.090 0.55 0.55 0.55 0.55 0.55 0.22 0.100 9” 0.100 0.00 0.00 0.00 0.00 0.00 0.22 0.110 10” 0.110 0.65 0.65 0.65 0.65 0.65 0.22 0.120 12” 0.130 0.65 0.65 0.75 0.75 0.75 0.22 0.140 ————————————————————————————————————————————— 14” 0.140 0.84 0.84 0.64 0.64 0.64 0.30 0.160, 16” 0.150 1.03 1.03 0.79 0.79 0.79 0.38 0.180 18” 0.170 1.23 1.23 0.94 0.94 0.94 0.46 0.190 20” 0.180 1.42 1.42 1.08 1.08 1.08 0.54 0.200 ————————————————————————————————————————————— 22” 0.200 1.61 1.61 1.23 1.23 1.23 0.62 0.230 24” 0.220 1.80 1.80 1.37 1.37 1.37 0.69 0.260 26” 0.240 1.99 1.99 1.52 1.52 1.52 0.77 0.000 28” 0.260 2.18 2.18 1.67 1.67 1.67 0.85 0.000 ————————————————————————————————————————————— 30” 0.290 2.38 2.38 1.81 1.81 1.81 0.93 0.000 32” 0.290 2.57 2.57 1.96 1.96 1.96 1.01 0.000 34” 0.320 2.76 2.76 2.11 2.11 2.11 1.09 0.000 36” 0.340 2.95 2.95 2.25 2.25 2.25 1.16 0.000 ————————————————————————————————————————————— 38” 0.360 3.14 3.14 2.39 2.39 2.39 1.24 0.000 40” 0.370 3.33 3.33 2.53 2.53 2.53 1.32 0.000 42” 0.380 3.53 3.53 2.68 2.68 2.68 1.39 0.000 44” 0.390 3.72 3.72 2.83 2.83 2.83 1.47 0.000 ————————————————————————————————————————————— 46” 0.410 3.91 3.91 2.98 2.98 2.98 1.55 0.000 48” 0.420 4.10 4.10 3.12 3.12 3.12 1.63 0.000 50” 0.440 4.29 4.29 3.25 3.25 3.25 1.71 0.000 52” 0.460 4.48 4.48 3.40 3.40 3.40 1.79 0.000 ————————————————————————————————————————————— 54” 0.470 4.68 4.68 3.56 3.56 3.56 1.86 0.000 56” 0.480 4.87 4.87 3.71 3.71 3.71 1.94 0.000 58” 0.490 5.06 5.06 3.86 3.86 3.86 2.02 0.000 60” 0.500 5.26 5.26 4.00 4.00 4.00 2.10 0.000 ————————————————————————————————————————————— This page intentionally left blank 155 Chapter 12 Estimating Fiberglass Ductwork INTRODUCTION Fiberglass ductwork has the following advantages over sheet metal: • It costs less than conventionally fabricated steel ductwork: 5% less than bare galvanized 30% less than insulated sheet metal 3 5% less than lined sheet metal • It costs less than galvanized ductwork fabricated on a coil line if insulated or lined: 20% less than insulated 35% less than fi ned • However, fi berglass costs 15% more than bare galvanized off of a coil line. • It requires very little machinery and tools to fabricate, minimal fl oor space and consequently overhead costs are far less than a sheet metal shop. • It’s more fl exible than sheet metal, easier to revise and manipulate at the job site in order to fi t into diverse, unpredictable fi eld conditions and to meet precise outlet locations. • It can be fabricated either in the shop or at the job site. • It’s lightweight. Shipping, material handling and hoisting are far easier than with sheet metal. • It has built in thermal insulation and acoustical absorption. • It has built in built in a vapor barrier. • And lastly, it’s an automatic energy saver over bare steel because it’s self insulating and virtually leak proof. Takeoff Procedures 1. Use duct take off sheet and fi ll out heading. 2. List inside dimensions of duct. 3. Write down type of duct. Use abbreviation. 4. Measure off pipe in 4 foot lengths and list each length. 5. Put down equivalent lengths for each fi tting. 6. List sheet metal components separately on bottom of duct take off sheet or on separate sheet, as you go along. Material Extension 1. Total the linear footage on each line and enter total in total linear foot column. 2. Enter the sq ft/lin ft from the chart which includes the allowance for the 8” comer overlap and a 5% waste factor. 3. Multiply the length times the sq/lin ft and enter in the square feet column. 4. Add up the total square feet. Material Costs Typical current prices: Square Feet Ordered Over 10,000 Type Board 0-2400 2400-10,000 Truckload 475 $0.96 $0.87 $0.79 800 $1.06 $0.10 $0.96 1400 $1.32 $1.28 $1.15 Budget Figures The budget cost of a 1000 square foot or larger batch of typical fi berglass duct work, under standard conditions, including a markup of 30% for overhead and profi t, based on union wages, is about $4.41 per square foot of duct. Non union cost is about 33% less, roughly $3.04 per square foot. 156 Mechanical Estimating Manual Calculating Labor Following labor productivity rates are based on: 1. Volume of 1000 SF and up 2. 800 Board 3. Average duct size of 18” x 12”, or equivalent 24 gauge galv. 4. Tie rod reinforcing. 5. Rates based on gross square footage including 8” overlap and 5% waste. 6. Using standard grooving machine. (See Fabrication Labor at the top of the following page.) Installation Labor Neither the duct size nor the percentage of fi ttings affects the installation productivity rate appreciably. Consequently the erection rate remains relatively constant at 30 sf/hr. Correction Factors 1. Shop labor a. Hand grooving machine versus grooving machine 1.50 b. Auto grooving machine versus manual machine .90 c. Auto closer versus manual .70 d. Auto groover and closer .60 e. Exhaust and return ducts with tie rods in conduits 1.33 f. Fittings versus straight duct 1.50 g. “V” groove versus shiplap 1.05 2. Channel or “T” bar reinforcing versus tie rods Shop 1.20 Field 1.10 3. 475 Board versus 800, Material costs .90 Shop and Field labor .95 4. 1400 Board versus 800, Material costs 1.20 Shop and Field labor 1.05 5. Material quantity discounts 0-2400 SF 1.05 2400-20,000 SF 1.00 Factory, truck load .94 Factory, car load .90 Square Foot Per Linear Foot of Fiberglass Ductwork ————————————————————————— Semi-Perim SF/LF SF/LF I.D. Includes allowances, No Width plus 8” corner overlap Allowance Depth 5% waste Included ————————————————————————— 12 2.8 2.00 14 3.1 2.34 16 3.5 2.67 18 3.9 3.00 20 4.2 3.34 ————————————————————————— 22 4.6 3.67 24 4.9 4.00 26 5.2 4.34 28 5.6 4.67 30 5.9 5.00 ————————————————————————— 32 6.5 5.34 34 6.7 5.67 36 7.0 6.00 38 7.3 6.34 40 7.7 6.67 ————————————————————————— 42 8.0 7.00 44 8.4 7.34 46 8.8 7.67 48 9.1 8.00 50 9.5 8.34 ————————————————————————— 52 9.8 8.67 54 10.1 9.00 56 10.5 9.34 58 10.9 9.67 60 11.2 10.00 ————————————————————————— 62 11.6 10.34 64 11.9 10.67 66 12.3 11.00 68 12.6 11.34 70 12.9 11.67 ————————————————————————— 72 13.3 12.00 74 13.7 12.34 76 14.0 12.67 78 14.4 13.00 80 14.7 13.34 ————————————————————————— 82 15.1 13.67 84 15.4 14.00 86 15.8 14.34 88 16.1 14.67 90 16,5 15.00 ————————————————————————— 92 16.8 15.34 94 17.2 15.67 96 17.5 16.00 98 17.9 16.34 100 18.2 16.67 ————————————————————————— Estimating Fiberglass Ductwork 157 FABRICATION LABOR ——————————————————————————————————————— Size Ranges ——————————————————————————————————————— Percentage 0.12” 13.30” 31.54” 55.84” 85.96” Fittings SF/ HR/ SF/ HR/ SF/ HR/ SF/ HR/ SF/ HR/ HR SF HR SF HR SF HR SF HR SF ——————————————————————————————————————— Str. Duct. Only 59 .0169 62 .0161 56 .0179 53 .0189 38 .0263 10-20% 55 .0183 58 .0174 52 .0191 49 .0202 35 .0284 20-30% 52 .0191 55 .0182 50 .0200 47 .0211 34 .0297 30-40% 50 .0200 53 .0190 48 .0208 45 .0220 32 .0311 Fittings Only 39 .0256 41 .0244 38 .0263 36 .0278 25 .0400 ——————————————————————————————————————— Example of Fiberglass Ductwork Takeoff and Extension [...]... 10.8 79 11.386 11. 894 0.850 0.887 0 .92 3 0 .96 0 0 .99 6 1.033 1.0 69 1.106 1.142 1.1 79 9.157 9. 792 10.426 11.061 11. 695 12.330 12 .96 4 13. 599 14.233 14.868 4.852 4 .92 3 5.161 5. 399 5.637 5.875 6.113 6.351 6.5 89 6.827 2.2 79 2.386 2. 492 2. 598 2.705 2.811 2 .91 7 3.024 3.130 3.237 3.440 3.680 3 .94 0 4.140 4.380 4.620 4.840 5.140 5.440 5.700 60 64 58 62 66 70 74 78 0.787 0.841 0. 894 0 .94 7 1.000 1.053 1.106 1.1 59 6.201... 8.7 39 9.246 9. 754 2.227 2.3 69 2.511 2.653 2. 794 2 .93 6 3.078 3.220 12.402 13.417 14.432 15.447 16.462 17.478 18. 493 19. 508 1.215 1.288 1.361 1.434 1.507 1.580 1.652 1.725 15.502 16.771 18.040 19. 3 09 20.578 21.847 23.116 24.385 7.065 7.541 8.017 8. 493 8 .96 9 9. 445 9. 921 10. 397 3.343 3.556 3.768 3 .98 1 4. 194 4.407 4.6 19 4.832 5 .94 0 6.480 7.000 7.560 8.240 8.640 9. 100 9. 500 82 86 90 94 98 1.212 1.265 1.3 19. .. 4. 69 5.06 5.42 5.80 6.53 7.27 3.80 4.54 5. 29 6.04 6. 79 7.54 9. 50 10.37 11.24 12.12 18.14 20.45 2.84 3.41 3 .97 4.53 5. 09 5.65 7.13 7. 79 8.44 9. 10 13.61 15.35 2.84 3.30 3.76 4.22 4. 69 5.15 5.61 6.07 6.53 7.00 7 .92 8.84 2.24 2.64 3.04 3.43 3.83 4.22 4.62 5.02 5.41 5.81 6.60 7. 39 3.34 3 .95 4.55 5.16 5.76 6.38 6 .99 7. 59 8.20 8.80 10.02 11.23 7.14 7 .92 8. 69 9.47 10.32 11.31 12.30 13. 29 14.27 15.26 17.24 19. 21... 2 .96 3.23 3.51 3.80 4.07 4.35 4 .90 5.45 2.85 3.41 3 .97 4.53 5. 09 5.65 7.13 7.78 8.43 9. 09 13.60 15.34 2.13 2.56 2 .98 3.40 3.82 4.24 5.35 5.84 6.33 6.82 10.21 11.51 2.13 2.48 2.82 3.17 3.51 3.86 4.21 4.55 4 .90 5.25 5 .94 6.63 1.68 1 .98 2.28 2.57 2.87 3.17 3.47 3.76 4.06 4.36 4 .95 5.54 2.51 2 .96 3.42 3.87 4.32 4. 79 5.24 5. 69 6.15 6.60 7.52 8.42 5.35 5 .94 6.52 7.10 7.74 8.48 9. 22 9. 97 10.70 11.44 12 .93 ... Trans 90 RE Tap Wye Sq/Rnd Offset 2 Rings ———————————————————————————————————————————— 4 5 6 7 8 9 10 0.138 0.145 0.153 0.161 0.168 0.176 0.184 0.806 0.882 0 .95 7 1.033 1.108 1.184 1.260 0. 597 0.633 0.668 0.704 0.7 39 0.775 0.810 1.612 1.763 1 .91 4 2.066 2.217 2.368 2.5 19 0.377 0. 395 0.413 0.431 0.450 0.468 0.486 2.015 2.204 2. 393 2.582 2.771 2 .96 0 3.1 49 2.3 19 2.417 2.514 2.611 2.7 09 2.806 2 .90 4 0. 896 0 .94 9... 3. 098 3. 293 3.488 3.683 3.878 4.072 4.267 4.462 4.657 1.322 1.428 1.534 1.641 1.747 1.854 1 .96 0 2.066 2.173 1.800 1 .94 0 2.100 2.240 2.380 2.540 2.840 3.040 3.240 30 32 34 36 38 40 42 44 46 48 0.337 0.5 49 0.575 0.602 0.628 0.655 0.681 0.708 0.734 0.761 3.663 3 .91 7 4.170 4.424 4.678 4 .93 2 5.186 5.4 39 5. 693 5 .94 7 1.5 19 1. 590 1.661 1.731 1.802 1.873 1 .94 4 2.015 2.086 2.157 7.326 7.833 8.341 8.848 9. 356 9. 864... 4.63 5.14 6.48 7.08 4.26 4.68 5.10 5.52 3.48 3.84 4.20 4.56 5.24 5.80 6.35 6 .90 9. 38 10.28 11.18 12.08 6. 39 7.02 7.65 8.28 3.24 3.36 3. 49 3.61 54x18 60x15 72x18 84x18 4 .93 5.27 5 .94 6.61 10.22 11.02 16. 49 18. 59 7.67 8.27 12.37 13 .95 5 .94 6.36 7.20 8.04 4 .92 5.28 6.00 6.72 7.45 8.00 9. 11 10.21 12 .97 13.87 15.67 17.46 8 .91 9. 54 10.80 12.06 3.74 3.86 4.11 4.36 ————————————————————————————————————————————... 1.056 1.1 09 1.162 1.215 1.480 1.500 1.540 1.600 1.640 1.700 1.740 12 14 16 18 20 22 24 26 28 0. 199 0.214 0.2 29 0.245 0.260 0.275 0. 291 0.306 0.321 1.411 1.632 1.886 2.140 2. 394 2.648 2 .90 1 3.155 3.4 09 0.881 0 .95 2 1.023 1. 093 1.164 1.235 1.306 1.377 1.448 2.822 3.265 3.772 4.280 4.788 5. 295 5.803 6.310 6.818 0.522 0.5 59 0. 595 0.632 0.668 0.705 0.741 0.778 0.814 3.527 4.081 4.716 5.350 5 .98 5 6.6 19 7.254... Straight 90 Elbw 45 Elbw Sq/Elbw Trans Tap Wye Sq/Rd Offset Door 12x12 18x12 24x12 30x12 1.68 1 .94 2. 19 2.44 2. 59 3.10 3.61 4.12 1 .94 2.33 2.71 3. 09 1 .94 2.25 2.57 2.88 1.53 1.80 2.07 2.34 2.28 2. 69 3.11 3.52 4.87 5.40 5 .93 6.46 2 .90 3.38 3.85 4.32 2.05 2.15 2.24 2.33 36x12 36x18 42x18 48x18 2. 69 2 .94 3.20 3.45 4.63 5.14 6.48 7.07 3.47 3.86 4.86 5.31 3.20 3.51 3.83 4.14 2.61 2.88 3.15 3.42 3 .93 4.35... 5.31 3.20 3.51 3.83 4.14 2.61 2.88 3.15 3.42 3 .93 4.35 4.76 5.18 7.04 7.71 8. 39 9.06 4. 79 5.27 5.74 6.21 2.43 2.52 2.62 2.71 54x18 60x18 72x18 84x18 3.70 3 .95 4.46 4 .96 7.67 8.27 12.37 13 .94 5.75 6.20 9. 28 10.46 4.46 4.77 5.40 6.03 3. 69 3 .96 4.50 5.04 5. 59 6.00 6.83 7.66 9. 73 10.40 11.75 13.10 6.68 7.16 8.10 9. 05 2.81 2 .90 3.08 3.27 ———————————————————————————————————————————— ———————————————————————————————————————————— . 1.661 8.341 0 .92 3 10.426 5.161 2. 492 3 .94 0 36 0.602 4.424 1.731 8.848 0 .96 0 11.061 5. 399 2. 598 4.140 38 0.628 4.678 1.802 9. 356 0 .99 6 11. 695 5.637 2.705 4.380 40 0.655 4 .93 2 1.873 9. 864 1.033. 70 1.053 8.7 39 2 .93 6 17.478 1.580 21.847 9. 445 4.407 8.640 74 1.106 9. 246 3.078 18. 493 1.652 23.116 9. 921 4.6 19 9.100 78 1.1 59 9.754 3.220 19. 508 1.725 24.385 10. 397 4.832 9. 500 ———————————————————————————————————————————— . 4.54 3.41 3.30 2.64 3 .95 7 .92 4 .95 3.15 24x12 3.21 5. 29 3 .97 3.76 3.04 4.55 8. 69 5.64 3. 29 30x12 3.58 6.04 4.53 4.22 3.43 5.16 9. 47 6.34 3.42 36x12 3 .95 6. 79 5. 09 4. 69 3.83 5.76 10.32 7.03