Section 675IAC20-2-4. Dimensional design

   (a) No limits are specified for the shape of swimming pools except that consideration shall be given to shape from the standpoint of safety and circulation of the water.

  (b) There shall be no protrusions, extensions, means of entanglement, or other obstructions in the swimming area that can cause the entrapment or injury of the bather.

(1) At no time shall interior basin divider walls be submerged during operation.

(2) All interior basin divider walls shall not exceed eighteen (18) inches in width.

  (c) There shall be construction tolerances allowed on all dimensional designs. See Table 2-1.

Table 2-1
PERMITTED CONSTRUCTION TOLERANCES FOR SWIMMING POOLS
Design Requirement	Permitted Construction Tolerances (in inches, unless otherwise noted)
Length, overall	+ 3
Width, overall	+ 3
Depth, deep area a, b	+ 3
Depth, shallow area b, c	+ 2
Floor nozzle flushness	+ 1/8
Stair tread and riser uniformity d	+ 3/8
Waterline, swimming pool or pools with nonadjustable skimming system (that is, gutters and zero-depth overflow trenches)	+ 1/8
Walls	+ 3 degrees
Other dimensions not specified above	+ 2
a As measured at a location measured from the basin wall equal to 60% of the nominal basin depth and at the location of the depth marking.
b For dimension requirements for diving wells, see Rule 2.
c As measured 3 feet from the basin wall at the location of the depth marking.
d Except as allowed by section 14(e)(2) of this rule: Bottom Stair Riser +/- 2 inches.

  (d) The size of Class A or D pools shall be governed by the requirements of the activities for which the installation is intended. (Fire Prevention and Building Safety Commission; 675 IAC 20-2-4; filed Aug 14, 1989, 9:00 a.m.: 13 IR 47, eff Sep 1, 1989 [IC 4-22-2-36 suspends the effectiveness of a rule document for thirty (30) days after filing with the secretary of state. LSA Document #89-17 was filed Aug 14, 1989.]; errata filed Nov 15, 1989, 5:00 p.m.: 13 IR 675; readopted filed Sep 11, 2001, 2:49 p.m.: 25 IR 530; readopted filed Sep 21, 2007, 9:20 a.m.: 20071010-IR-675070388RFA; readopted filed Oct 10, 2007, 9:16 a.m: 20071031-IR-675070388RFA; filed Mar 25, 2011, 10:19 a.m.: 20110420-IR-675090789FRA; readopted filed Aug 7, 2013, 8:51 a.m.: 20130904-IR-675130181RFA)