With space at a premium in many urban areas, developers are digging deeper foundations to increase the square footage of residential, commercial and mixed-use building projects
Where a hydrostatic pressure condition does not exist, dammproofing shall be provided and a base shall be installed under the floor and a drain installed around the foundation perimeter.
This section implies that a waterproofing application is completed when the site ground water table is maintained at an elevation of not less than 6 inches below the bottom of the ground slab.
1807.3 Waterproofing required. Where the ground-water investigation required by Section 1802.2.3 indicates that a hydrostatic pressure condition exists.
1807.1.3 Ground-water control. Where the ground-water table is lowered and maintained at an elevation not less than 6 inches (152 mm) below the bottom of the lowest floor, the floor and walls shall be dampproofed in accordance with Section 1807.2.
