Authority: IC 22-13-2-2

Affected: IC 22-12; IC 22-13; IC 22-15; IC 36-7

Sec. 6. (a) All slopes shall be uniform and shall slope to the drain or the water evacuation area.

1. (1) Where water depths are less than five (5) feet, floor slopes shall not exceed 1:12.
2. (2) Where the water depth is five (5) feet or more, floor slopes shall not exceed 1:3.

(b) When a transitional radius is provided between the basin wall and floor, it shall be as follows:

1. (1) The radius shall have its center not less than two (2) feet nine (9) inches below the waterline in deep areas or two (2) feet six (6) inches in the shallow area.
2. (2) The radius shall be tangent to the wall.
3. (3) The radius shall be at least equal to, or greater than, the depth of the basin minus the vertical wall depth measured at the waterline minus three (3) inches to allow draining to the main outlet.

(Fire Prevention and Building Safety Commission; 675 IAC 20-5-6; filed Mar 25, 2011, 10:19 a.m.: 20110420-IR-675090789FRA; readopted filed Aug 7, 2013, 8:51 a.m.: 20130904-IR-675130181RFA; readopted filed Jul 2, 2019, 2:21 p.m.: 20190731-IR-675190264RFA; readopted filed Nov 18, 2025, 10:36 a.m.: 20251210-IR-675240566RFA)