International Building Code 3304.1
Excavation and fill. Excavation and fill for buildings
and structures shall be constructed or protected so as not to
endanger life or property. Stumps and roots shall be removed
from the soil to a depth of at least 12 inches (305 mm) belowthe
surface of the ground in the area to be occupied by the building.
Wood forms which have been used in placing concrete, if
within the ground or between foundation sills and the ground,
shall be removed before a building is occupied or used for any
purpose. Before completion, loose or casual wood shall be
removed from direct contact with the ground under the building.
Slope limits. Slopes for permanent fill shall not be
steeper than one unit vertical in two units horizontal
(50-percent slope). Cut slopes for permanent excavations
shall not be steeper than one unit vertical in two units horizontal
(50-percent slope). Deviation from the foregoing
limitations for cut slopes shall be permitted only upon the
presentation of a soil investigation report acceptable to the
building official.
Surcharge. No fill or other surcharge loads shall
be placed adjacent to any building or structure unless such
building or structure is capable of withstanding the additional
loads caused by the fill or surcharge. Existing footings
or foundations which can be affected by any excavation
shall be underpinned adequately or otherwise protected
against settlement and shall be protected against later movement.
Footings on adjacent slopes. For footings on
adjacent slopes, see Chapter 18.
Fill supporting foundations. Fill to be used to
support the foundations of any building or structure shall
comply with Section 1803.5. Special inspections of compacted
fill shall be in accordance with Section 1704.7.
International Building Code 3304.1.1
Slope limits. Slopes for permanent fill shall not be
steeper than one unit vertical in two units horizontal
(50-percent slope). Cut slopes for permanent excavations
shall not be steeper than one unit vertical in two units horizontal
(50-percent slope). Deviation from the foregoing
limitations for cut slopes shall be permitted only upon the
presentation of a soil investigation report acceptable to the
building official.
International Building Code 3304.1.2
Surcharge. No fill or other surcharge loads shall
be placed adjacent to any building or structure unless such
building or structure is capable of withstanding the additional
loads caused by the fill or surcharge. Existing footings
or foundations which can be affected by any excavation
shall be underpinned adequately or otherwise protected
against settlement and shall be protected against later movement.
International Building Code 3304.1.3
Footings on adjacent slopes. For footings on
adjacent slopes, see Chapter 18.
International Building Code 3304.1.4
Fill supporting foundations. Fill to be used to
support the foundations of any building or structure shall
comply with Section 1803.5. Special inspections of compacted
fill shall be in accordance with Section 1704.7.