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Note: This spreadsheet is for initial calculations only. All numbers should be confirmed by an engineer licensed in your state/country to assure safety.
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EARTHBAG WALL ANALYSIS NEAR DOOR OPENINGS, UNDER GRAVITY CONDITIONSShear Resistance of Earthbags
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Convert to Radians Here
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R, Radius of Dome @ H2 above ground5.5ftCoeff. of Friction0.43Input Angle45
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H2, Height of Doorway8.8ftAngle in Radians0.785
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Weight Density of Earthbag130lb/ft^3Due to Earthbags @ Door Supports
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W (Width of Doorway)3.42ftShear Strength at Top of Door403.5950579lb/ft
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H1 (Height of Earthbag dome above Door Opening)7ftShear Strength at Bottom of Doorway933.3550579lb/ft
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B, (Breadth of Earthbag)1ft
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Slope of Dome in Radians (Radians, See Cell H3 to Cell I5)0.785radiansDue to Earthbags along Dome Perimeter
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Rp, Distance of Point of application of axial load from top of doorway1.83ftShear Strength at Top of Door153.4505149lb/ft
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T, Thickness of Wall1ftShear Strength at Bottom of Doorway683.2105149lb/ft
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A_Tributary, Tributary area of load due to dome sloping18.97ft^2
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Total Circumference of Earthbag Required to resist "H"
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Dead Load due to Stucco Finishing10psfL_Req, Length of Earthbag Required9.703310586ft
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L_Provided =34.55751919ft
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Loads due to Opening, along Slope
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Wt, Self Weight of Earthbag Dome2466.1lbHenceOK
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Dst, DL due to Stucco189.7lb
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DL_total=Wt+Dst2655.8lb
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Unfactored Loads @ Supports of Door
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DL (lbs)Snow (lbs)
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Maximum Load Combinations for LRFD as per ASCE 7-16 Chapter 2
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Case 1: 1.4DL
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H1315.077236lb
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P1314.030421lb
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Case 2: 1.2DL + 0.5S
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H1318.432025lb
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P1317.38254lb
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Case 3: 1.2DL+1.6S
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H1739.122548lb
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P1737.73819lb
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M, Maximum Buckling Moment3180.060887lb-ft
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