The provisions of Section 1805 of IBC are adopted by reference with the following modifications:
1. Revise Section 1805.1 to read:
"1805.1 General.
Walls or portions thereof that retain earth and enclose interior spaces and floors below grade shall be waterproofed and dampproofed in accordance with this section.
Exception: Spaces containing occupancies other than Group A, E, I or R where such omission is not detrimental to the building or occupancy."
2. Delete Section 1805.1.1.
3. Revise Section 1805.1.2 by replacing "an approved" with "a".
4. Delete Section 1805.1.2.1.
5. Revise Section 1805.2 to read:
"1805.2 Dampproofing.
Where hydrostatic pressure will not occur as determined by Section 1803.5.4, floors and walls shall be dampproofed in accordance with this section."
6. Revise Section 1805.2.1 by replacing "approved" with "equivalent."
7. Revise Section 1805.2.2 by replacing "approved" with "equivalent."
8. Revise Section 1805.2.2.1 to read:
"1805.2.2.1 Surface preparation of walls.
Prior to application of dampproofing materials on concrete walls, holes and recesses resulting from the removal of form ties shall be sealed with a bituminous material or other equivalent methods or materials. Unit masonry walls shall be parged on the exterior surface below ground level with not less than 3/8 inch (9.5 mm) of Portland cement mortar. The parging shall be coved at the footing.
Exception: Parging of unit masonry walls is not required where a material is intended for direct application to the masonry."
9. Revise Section 1805.3.1 by replacing "approved" with "equivalent."
10. Revise Section 1805.3.2 by replacing "approved" with "equivalent."
11. Revise Section 1805.3.3 by replacing "approved" with "equivalent."
12. Revise Section 1805.4 to read:
"1805.4 Subsoil drainage system.
Where a permanent hydrostatic pressure condition does not exist, dampproofing shall be provided and a granular base course shall be installed under the floor and a drain installed around the foundation perimeter. A subsoil drainage system designed and constructed in accordance with Section 1805.1.3 shall be deemed adequate for lowering the ground-water table."
13. Revise Section 1805.4.2 to read:
"1805.4.2 Foundation drain.
A drain shall be placed at the perimeter of the foundation."
14. Revise Section 1805.4.3, excluding the exception, to read:
"1805.4.3 Drainage discharge.
The floor base course and foundation perimeter drain shall discharge by gravity or mechanical means into a drainage system that complies with the Chicago Plumbing Code."