Internal Load Design

Time Lag Factor 3.5

DL = Deflection lag factor, dimensionless; Use 1.0 when using prism load for dead load calculation.

Pipe Stiffness 7 psi

Add. Live Load (W L) None

Depth of Burial 2ft

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Please input Start value.

Bedding constant (k) 0.100

Bedding Angle Constant, K
0.110
0.108
0.103
0.100
0.096
0.089
0.085
0.083
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Please input your value.

Earth Load ( We) 115 lbs/ft3

lbs/ft3 κμ Material
0.1650 Dry Sand
0.1650 Ordinary (damp) Sand
0.1650 Wet Sand
0.1300 Damp Clay
0.1100 Saturated Clay
0.1500 Saturated Topsoil
0.1650 Sand & Damp Topsoil
0.1924 Granular materials Without Cohesion
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Please input Your value.

Surcharge Load (Ws) 12 psi

Embedment Soil Modulus (E’b) 1000 lbs/in2

UNCOMPACTED Mod >85% or >90% High >95% or >100%
1 Crushed Rock
2 GW GP SW SP
3 GC GM SC SM sCL sML gCL gML
4 CL ML

Natural or In place soil modulus 1500 lbs/in2

Unconfined Compressive
Strength, Tsf ASTM D 2166
Description E'n - lbs/in2
0 - 0.125 Very, very, soft
0.125 -0.25 Very soft
0.25 - 0.50 Soft
0.5 - 1.00 Medium
1.00 - 2.00 Stiff
2.00 - 4.00 Very stiff
4.00 - 6.00 Hard
> 6.00 Very hard

Pipe Diameter (D) 4in

Trench Width 0in