675 IAC 14-4.4-56 Section R408.8; under-floor drainage

Sec. 56. Add SECTION R408.8 to read as follows: SECTION R408.8 UNDER-FLOOR DRAINAGE. Under-floor spaces shall comply with Section R408.3, item 1, and shall be drained to a gravity discharge or sump pit, having a minimum size of 18 inches (457 mm) diameter by 24 inches (610 mm) deep, by one of the following methods: 1. The under-floor space shall be graded at a slope of not less than 1 inch (25 mm) for each 10 feet (3,048 mm) to a gravity discharge or a sump pit installed below the lowest point of the slope so that, in the event of excess water accumulation, a sump pump can be readily installed. 2. The under-floor space shall be graded at a slope of not less than 1/2 inch (13 mm) for each 10 feet (3,048 mm) to a gravity discharge or a sump pit installed below the lowest point of the slope. Not less than 3 inches (76 mm) of granular material shall be placed between the ground surface and the vapor retarder so that, in the event of excess water accumulation, a sump pump can be readily installed.