Laserfiche WebLink
i 30; 3- '. k6or Ailnb?? iPS11TxaUOn . y5t.rri: Ji'ZiSi� <br />Trench Dimensions <br />Required Length of Trench per 100 square feet of Roof Surface" <br />width depth" <br />coarse sand sand loamy sand sandy loam loam <br />1 z fr <br />1 <br />0.72 <br />1.44 <br />3:.38 <br />$,49 <br />7.88 <br />1.5 ft. <br />0.36 <br />1.10 <br />2.54 <br />4.08 <br />5.W <br />1).0 fi. <br />4:45 <br />0.99 <br />2.06 <br />3.30 <br />4.60 <br />2.5 ft, <br />0.39 <br />0.73 <br />1 72 <br />2.76 <br />3.94 <br />3:.0 ft.. <br />0.32 <br />0.6� <br />1.49 <br />2:38 <br />3.28 <br />7 <br />1:0 ft. <br />1.5 ft. <br />0,60 <br />0.47 <br />I..19 <br />y9 .., <br />2.68 <br />2.04 <br />4.34 <br />3.28 <br />6.2:2' <br />4.62 <br />2.0 fL <br />0.39 <br />1.66 <br />2:66 <br />3,70; <br />2.5 ft. <br />0.33 <br />0.65 <br />I A I <br />2.26 <br />3.10 <br />. <br />3.0 ft. <br />0.28 <br />0.56 <br />1.23 <br />1.94 <br />2.68 <br />1:..0 ft.. <br />0.51 <br />1.01 <br />2.24 <br />3.64 <br />5.14 <br />1.5 ft, <br />0.41 <br />0.79 <br />1.71. <br />2.76 <br />3.88 <br />?.0 It. <br />0.34 <br />0..66 <br />1.40 <br />2.26 <br />3,14 <br />2.5 ft. <br />0.2.9 <br />0.-6 <br />1.20 <br />1.;90 <br />2:66 <br />3 0 ft. <br />0'.25 <br />0.49 <br />1_05. <br />I.65 <br />2:30 <br />3.0 ft. 1.0 ft. <br />0.44 <br />0.88 <br />1.92 <br />MO <br />4.40 <br />1.5 ft. <br />0.36 <br />0.69 <br />1.47 <br />2.38 <br />3.36 <br />2.0 ft. <br />0.30 <br />0.58 <br />1.21 <br />1.94 <br />.2-74 <br />2.5 ft. <br />0.23 <br />0.50 <br />1.04 <br />1.65 <br />23.2 <br />3 4. <br />0.22 <br />0.44 <br />0..91 <br />1.43 <br />2.00 <br />3._5 ft. 1.:0 ft. <br />0:39 <br />0.78 <br />I.bB <br />2.72 <br />3;88 <br />1.5. ft. <br />0.32 <br />0.62 <br />1.29 <br />2.08 <br />2.96 <br />0.26 <br />0.51. <br />1.07 <br />1.70 <br />2.42 <br />2.5 ft. <br />0.23 <br />0.44 <br />0..92, <br />1.45 <br />106 <br />3.0 ti. <br />0.20 <br />0.39 <br />0-.81 <br />1.27 <br />1-79 <br />4.0 ft 1.0 ft. <br />0.35 <br />0.70. <br />1.49 <br />2.42 <br />3.4.6 <br />1.5 ft, <br />0.29 <br />0.55 <br />I.I5 <br />1.85 <br />2.66 <br />r 2.0 ft. <br />0.24 <br />0.46 <br />0.95 <br />1.52- <br />2.18 <br />2.5 -ft. <br />0.20 <br />0..40 <br />0.:82 <br />1.30 <br />1..86. <br />3..0 ft. <br />0.1.8 <br />0.35 <br />0.73 <br />1.13 <br />1.62 <br />.vcp UI rerers Lo uie aeptn or wasnea rocx, not aeptn rrom surface <br />"Soil textures.to be determined using the results. of soil gradation tests and the USDA Textural Tri-angie, <br />Example: An infiltration.uench 3.5 feet Rdde and 2 .feet deep, dug. in saady. loam soils, for runoff: from. <br />a 1500 square foot roof, would be 25.5. feet long; (6 art value of 1.70 multiplied.b3.15) <br />3-2_10 <br />