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Soil Type
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Select the type of soil supporting the foundation
from the drop-down list:
-
Cohesive Soil
-
Cohesionless Soil
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|
Unit Weight of Soil
|
Type a density to be used for the soil, in the
selected units.
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Soil Bearing Capacity
|
Type the allowable bearing capacity of the soil, in
the selected units.
(US Codes only) If the
Use Variable Bearing Capacity option is
set in the
Global Settings dialog, then
select a bearing capacity table name from the drop-down list, instead.
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Depth of Soil Above Footing
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Specify the depth from soil surface to the top of footing, in the selected units.
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Depth of Water Table
|
Type the depth from soil surface to the water table,
in the selected units.
If water table is not to be considered for this
footing, leave this value blank.
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Surcharge for Loading
|
Type a surcharge loading above the footing, in the
selected units.
For the stability check for calculating the factor of safety in sliding, surcharge is treated as a temporary load, meaning, it is treated as though there may be times when it is not present. Thus, its contribution to sliding resistance is not considered. That will reduce the total sliding resistance which will produce a more conservative result.
However, surcharge is considered when determining the soil bearing pressures under service loads since it leads to an increase in soil pressure.
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Cohesion
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(Cohesive Soil type) Type a cohesion pressure, in the selected units.
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Shear Strength
|
(Cohesionless Soil type) Type a shear strength for the soil, in the selected
units.
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Bottom Clear Cover
|
Type a concrete clear cover distance to be used for
the bottom-most layer of footing reinforcement, in the selected units.
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Min % of Contact Area for Service Loads
|
Type a minimum percent of footing surface area that
must remain in contact with the supporting soil under service load
conditions. This is used to limit uplift or overturning. Type zero
(0) to direct the program to skip this check.
Note: If these
requirements are not met, footing design is reported as failure.
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< Previous
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Steps the Wizard to the previous step. |
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Next >
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Proceeds the Wizard to the next step. |
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Cancel
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Exits the Wizard without creating a new Isolated Footing Job.
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