Indiana Administrative Code › Title 675 - FIRE PREVENTION AND BUILDING SAFETY COMMISSION › Article 14 - ONE AND TWO FAMILY DWELLING CODE › Rule 4.4 - 2020 Indiana Residential Code › Section 4.4-38 - Section R326; swimming pools, spas, and hot tubs

Current through July 10, 2024
Authority: IC 22-13-2-2; IC 22-13-2-2.5; IC 22-13-2-13
Affected: IC 22-12; IC 22-13; IC 22-14; IC 22-15; IC
				  36-7
Sec. 38.
Delete the text of SECTION R326 and substitute as
				  follows:
SECTION R326.1 SPECIAL PROVISIONS.
SECTION R326.1.1. Residential swimming pools are Class 2
				  structures according to IC 22-12-1-5. Enforcement of Section R326 is the
				  responsibility of local units of government.
SECTION R326.1.2. The provisions of Section R326 are not
				  intended to restrict the appropriate use of materials, equipment, or methods of
				  design not specifically described in this rule.
SECTION R326.1.3. The enforcing official may require
				  submission of evidence or proof that substantiates any claims made regarding
				  the appropriate use of materials, equipment, or methods of design.
SECTION R326.1.4. This section shall not authorize a variance
				  from or modification of any rule of the fire prevention and building safety
				  commission except pursuant to variance authority provided for in IC 22-13-2-7
				  and IC 22-13-2-11.
SECTION R326.2 DEFINITIONS.
SECTION R326.2.1 DEFINITIONS; GENERAL.
For the purpose of this code, the definitions in this section
				  apply throughout Section R326.
SECTION R326.2.2 DEFINITIONS "A".
"ABRASION HAZARD" means a sharp or rough surface that could
				  cause injury under normal use.
"ACCESSIBLE" means, when applied to a fixture, connection,
				  appliance, or equipment, having access thereto, but may require the removal of
				  an access panel, door, or similar obstruction. "Readily accessible" means
				  direct access without the necessity of removing any panel, door, or similar
				  obstruction.
"AGITATION" means the mechanical or manual movement to
				  dislodge the filter aid and dirt from the filter element.
"AIRBREAK" means a physical separation that may be a low
				  inlet into the indirect waste receptor from the fixture, appliance, or device
				  indirectly connected.
"AIR BUMP ASSIST BACKWASH" means, in a diatomite type filter,
				  the compressing of a volume of air in the filter effluent chamber (by means of
				  an air compressor or by the water pressure from the recirculating pump) that,
				  when released, rapidly decompresses and forces water in the filter tank through
				  the elements in a reverse direction dislodging the filter aid and accumulated
				  dirt and carrying them to waste.
"AIRGAP" means the unobstructed vertical distance through the
				  free atmosphere between the lowest opening from any pipe or faucet conveying
				  water or waste to a tank, plumbing fixture receptor, or other device and the
				  flood level rim of the receptacle.
"APPROVED" means, as to materials, equipment, design, and
				  types of construction, acceptance by the code official by one (1) of the
				  following methods:
1. Investigation or
				tests conducted by recognized authorities.
2. Investigation or tests conducted by
				technical or scientific organizations.
3. Accepted principles.
The investigation, tests, or principles shall establish that
				  the materials, equipment, and types of construction are safe for the intended
				  purpose.
"APPROVED AGENCY" means an established and recognized agency
				  regularly engaged in conducting tests or furnishing inspection services, when
				  such agency has been approved by the state building commissioner. SECTION
				  R326.2.3 DEFINITIONS "B".
"BACKWASH" means the process of thoroughly cleaning the
				  filter medium or elements, or both, by the reverse flow of water.
"BACKWASH CYCLE" means the time required to backwash the
				  filter system thoroughly.
"BACKWASH PIPE" means a type of "filter waste discharge
				  piping" as defined in Section R326.2.7.
"BACKWASH RATE" means the rate of application of water
				  through a filter during the backwash cycle expressed in gallons per minute per
				  square foot of effective filter area.
"BASIN" means any vessel constructed of man-made materials
				  and designed to hold water to be used as a swimming pool, spa, or hot
				  tub.
"BATHER" means a person using the pool and adjoining deck
				  areas for the purpose of water sports or related activities.
"BODY FEED" means the continuous addition of controlled
				  amounts of filter aid during the operation of a diatomite type filter to
				  maintain a permeable filter cake. If added as a slurry, this may be referred to
				  as a slurry feed.
"BOOSTER PUMP SYSTEM" means a device used to provide
				  hydraulic support for certain types of equipment such as the following:
1. Pool cleaning systems.
2. Chlorinators.
3. Solar systems.
4. Therapy jets.
5. Water features.
"BREAKPOINT CHLORINATION" means the addition of a sufficient
				  amount of chlorine to water to destroy the combined chlorine present. SECTION
				  R326.2.4 DEFINITIONS "C".
"CARTRIDGE" means a filter component of either the depth or
				  surface type having fixed dimensions and designed to remove suspended particles
				  from water flowing through the unit.
"CARTRIDGE, DEPTH TYPE" means a filter cartridge with a
				  medium relying on penetration of particulates into the medium for removal and
				  providing adequate holding capacity of such particulates.
"CARTRIDGE, SURFACE TYPE" means a filter cartridge with a
				  medium relying on retention of particles on the surface of the cartridge for
				  removal.
"CHEMICAL FEEDER" means any device used to feed chemicals
				  such as sanitizers, pH adjusters, and algicide into a pool or spa.
"CHEMICAL FEEDER OUTPUT RATE" means the weight or volume of
				  active ingredients delivered by a chemical feeder expressed in units of weight
				  of volume and time.
"CHEMICAL FEED RATE INDICATOR" means a mechanism that will
				  produce reproducible results expressed in units of weight or volume of chemical
				  per unit of time or per unit of volume of water. The mechanism may:
1. be a direct reading instrument;
				or
2. require the use of a
				reference chart.
"CHEMICAL PIPING" means piping that conveys concentrated
				  chemical solutions from a feeding apparatus to the circulation piping.
"CIRCULATION SYSTEM" means an arrangement of mechanical
				  equipment or components, or both, designed to ensure even distribution of heat,
				  chemicals, and filtrated water throughout the pool or spa. The term includes
				  filters, pumps, strainers, disinfectant, or other chemical feed devices,
				  piping, inlets, drains, overflow fittings, and other appurtenances.
"CODE OFFICIAL" means the local building official as
				  authorized under IC 36-7-2-9 and local ordinance. "CORROSION-RESISTANT" means
				  capable of maintaining original surface characteristics under the prolonged
				  influence of the use environment.
"COVE" means the radius between the wall and the floor.
				  SECTION R326.2.5 DEFINITIONS "D".
"DECKS" means those areas surrounding a pool that are
				  specifically constructed or installed for use by bathers.
"DEEP AREAS" means the portions of a pool having water depths
				  in excess of five (5) feet.
"DESIGN HEAD" means the total head requirement of the
				  circulation system at the design rate of flow.
"DESIGN RATE OF FLOW (DESIGN FILTER RATE)" means the rate of
				  flow in a system that is used for design calculation. (The volume of the pool,
				  spa, or hot tub in gallons divided by the number of minutes in the turnover
				  time.)
"DIATOMITE FILTER" means one designed to filter water through
				  a thin layer of filter aid such as diatomaceous earth or volcanic ash.
				  Diatomite filters may be of the pressure or vacuum type.
"DISTRIBUTION SYSTEM, LOWER" means those devices used in the
				  bottom of a sand type filter to:
1.collect the water uniformly during the
				filtering; and
2. distribute the
				backwash water uniformly during the backwashing.
"DISTRIBUTION SYSTEM, UPPER" means those devices designed to
				  distribute the water entering a sand type filter in a manner such as to prevent
				  movement or migration of the filter media. This system shall also properly
				  collect water during filter backwashing unless other means are provided.
"DIVING BOARD" means a recreational mechanism for entering a
				  swimming pool, consisting of a semi-rigid board that derives its elasticity
				  through the use of a fulcrum mounted below the board.
"DIVING EQUIPMENT, MANUFACTURED" means manufactured diving
				  equipment and shall include diving boards, jump boards, and spring boards.
				  Architectural features such as decorative rocks and elevated bond beams are not
				  considered to be manufactured diving equipment. SECTION R326.2.6 DEFINITIONS
				  "E".
"EFFECTIVE FILTRATION AREA" means the total surface area
				  through which the design flow rate will be maintained during filtration.
				  SECTION R326.2.7 DEFINITIONS "F".
"FACE PIPING" means the piping, with all valves and fittings,
				  that is used to connect the filter system together as a unit.
"FILTER" means a device that separates solid particles from
				  water by circulating the water through a porous substance (a filter medium
				  element).
"FILTER AID" means a type of finely divided media used to
				  coat a septum type filter, usually diatomaceous earth or volcanic ash. (
"FILTER, CARTRIDGE" means a filter that uses a porous
				  cartridge as its filter medium.
"FILTER CYCLE" means the operating time between cleaning or
				  backwash cycles.
"FILTER, DIATOMACEOUS EARTH" means a filter that uses a thin
				  layer of diatomaceous earth as its filter medium that periodically must be
				  replaced.
"FILTER ELEMENT" means that part of a filter that supports
				  the surface upon which the filter aid is deposited
(usually in diatomite filters).
"FILTER MEDIA" means the finely graded material that entraps
				  suspended particles (sand, anthracite).
"FILTER, PERMANENT MEDIUM" means a filter that under normal
				  use will not have to be replaced.
"FILTER RATE" means the rate of application of water to a
				  filter expressed in gallons per minute per square foot of effective filter
				  area.
"FILTER ROCK" means graded, rounded rock or gravel, or both,
				  not subject to degradation by common pool chemical used to support filter
				  media.
"FILTER SAND" means a specially graded type of permanent
				  filter media.
"FILTER SEPTUM" means that part of the filter element in a
				  diatomite type filter upon which a cake of diatomite or other nonpermanent
				  filter aid may be deposited.
"FILTER WASTE DISCHARGE PIPING" means piping that conducts
				  wastewater from a filter to a drainage system. Connection to drainage system is
				  made through an airgap or other approved method.
"FLOOR" means the interior bottom pool surface and consists
				  of that surface from a horizontal plane up to a maximum of a forty-five (45)
				  degree slope.
"FLOW BALANCE VALVE" means a device to regulate the effluent
				  from the skimmer housing of each of a combination of two (2) or more surface
				  skimmers.
"FREEBOARD" means the clear vertical distance in a sand type
				  filter between the top of the filter media and the lowest outlet of the upper
				  distribution system.
"FRESH WATER" means water having a specific conductivity less
				  than a solution containing six thousand
(6,000) parts per million of sodium chloride.
"FRICTION LOSS" means the pressure drop expressed in feet of
				  water or psi caused by liquid flowing through the piping and fittings.
SECTION R326.2.8 DEFINITIONS "H".
"HEAD LOSS" means the total pressure drop in pounds per
				  square inch (kilo Pascals) or feet (meters) or head between the inlet and the
				  outlet of a component.
"HIGH RATE SAND FILTER" means a sand filter designed for
				  flows in excess of five (5) gallons per minute per square foot.
"HYDROJET BOOSTER PUMP SYSTEM" means a system whereby one (1)
				  or more hydrojets are activated by the use of a pump that is completely
				  independent of the filtration and heating system of a spa.
"HYDROJETS" means a fitting that blends air and water
				  creating a high velocity, turbulent stream of air enriched water.
SECTION R326.2.9 DEFINITIONS "I".
"INDIRECT WASTE PIPE" means a pipe that does not connect
				  directly with the drainage system but conveys liquid wastes by discharging into
				  a plumbing fixture, interceptor, or receptacle that is directly connected to
				  the drainage system.
"INLET FITTING" means a fitting or fixture through which
				  circulated or hydrojetted water enters a pool, spa, or hot tub.
"INTERACTIVE PLAY ATTRACTION" means a water attraction,
				  including, but not limited to, splash pads, spray pads, and manufactured
				  devices using sprayed, jetted, or other water sources contacting the users, not
				  incorporating standing or captured water as part of the user activity area, and
				  not utilizing a pool or spa circulation system.
SECTION R326.2.10 DEFINITIONS "J".
"JUMP BOARD" means a recreational mechanism that has a coil
				  spring, leaf spring, or comparable device located beneath the board that is
				  activated by the force exerted in jumping on the board.
SECTION R326.2.11 DEFINITIONS "L".
"LADDERS" means the following:
"DECK LADDER" means a ladder for deck access from outside the
				  pool.
"IN-POOL LADDER" means a ladder located in a pool to provide
				  ingress and egress from the deck.
"LIMITED ACCESS LADDER" means a ladder with provision for
				  making entry inaccessible when a pool is not in use, that is, swing-up,
				  slide-up, or equivalent. "LINER" means the membrane that acts as a container
				  for the water, usually categorized as one (1) of the following:
1. "EXPANDABLE LINER" means a liner that is
				constructed of a material that has the capability of stretching into a greater
				depth of irregular shape other than the original constructed
				dimensions.
2. "HOPPER LINER" means
				a liner that is used to obtain greater depth by geometrical pattern
				construction on the liner bottom or floor to fit a predetermined size and
				shape.
"LISTED" means equipment or materials included in a list
				  published by an organization engaged in product evaluation, that maintains
				  periodic inspection of production of listed equipment or materials, and whose
				  listing states either that the equipment or material meets appropriate
				  standards or has been tested and found suitable for use in a specified
				  manner.
"LOWER DISTRIBUTION SYSTEM" (underdrain) means those devices
				  used in the bottom of a permanent medium filter to collect the water during the
				  filtering and to distribute the water during the backwashing.
SECTION R326.2.12 DEFINITIONS "M".
"MAIN OUTLET" means the outlet fitting or fittings at or near
				  the deepest portion of a swimming pool, spa, or hot tub through which water
				  passes to the recirculating system. This outlet is often referred to as the
				  "main drain".
"MAKE-UP WATER" means fresh water used to fill or refill the
				  pool.
"MULTIPORT VALVE" means a valve for various filter
				  operations, which combines in one (1) unit the function of two (2) or more
				  single direct flow valves.
SECTION R326.2.13 DEFINITIONS "N".
"NET POSITIVE SUCTION HEAD" or "NPSH" means the head
				  available at the entrance or eye of an impeller to move and accelerate the
				  water entering the eye. This head is the gauge pressure at the suction flange
				  of the pump plus the velocity head.
"NONSWIMMING AREA" means any portion of a pool where water
				  depth, offset ledges, or similar irregularities would prevent normal swimming
				  activities.
"NPSH, AVAILABLE" means a function of the system in which the
				  pump operates the available NPSH at the desired rate of flow.
"NPSH, REQUIRED" means a function of the pump design that
				  varies among different makes, and a valve that must be supplied by the pump
				  manufacturer.
SECTION R326.2.14 DEFINITIONS "P".
"PERIMETER OVERFLOW SYSTEM" means a continuous channel formed
				  into the sidewall entirely around the perimeter of the pool, unless interrupted
				  by steps, into which surface pool water is continuously drawn during normal
				  operation to provide a skimming action.
"PINCHING HAZARD" means any configuration of components that
				  would pinch or entrap the fingers or toes of a bather.
"POOL" includes the following:
"COMBINATION POOL" means a pool used for swimming and
				  diving.
"VANISHING EDGE POOL" means a pool where the top of one (1)
				  or more of the basin wall or walls is submerged with no adjacent deck or
				  decks.
"WADING POOL" means a shallow pool having a maximum depth of
				  twenty-four (24) inches and intended for children's play.
"WHIRLPOOL". See "SPA".
"ZERO-DEPTH ENTRY POOL" means a water attraction having a
				  sloped entrance to where the water depth is zero (0) inches at the shallowest
				  point. "POOL DEPTH" means the distance between the floor of pool and the
				  waterline.
"POOL PLUMBING" means all chemical, circulation, filter waste
				  discharge piping, deck drainage, and water filling systems.
"POSITIVE DISPLACEMENT" means the mechanical displacement of
				  a volume of fluid. "PRECIPITATE" means a solid material that:
1. is forced out of a solution by some
				chemical reaction; and
2. may
				settle out or remain as a haze in suspension (turbidity).
"PRECOAT" means the initial coating of filter aid on the
				  septum of a diatomaceous earth filter.
"PUMP DISCHARGE PRESSURE" means the actual gauge reading
				  measured in pounds per square inch taken at the discharge outlet of a
				  pump.
"PUNCTURE HAZARD" means any surface or protrusion that would
				  puncture a bather's skin under casual contact.
SECTION R326.2.15 DEFINITIONS "R".
"RAPID SAND FILTER" means a filter designed to be used with
				  sand as the filter media.
"RATED PRESSURE" means that pressure that is equal to or less
				  than the designed pressure and appears on the data plate of the
				  equipment.
"RECEPTOR" means an approved plumbing fixture or device of
				  such material, shape, and capacity as to adequately receive the discharge from
				  indirect waste piping, so constructed and located as to be readily
				  cleaned.
"RECESSED TREADS" means a series of vertically spaced
				  cavities in the pool wall creating tread areas for steps.
"REMOVABLE" means capable of being disassembled with the use
				  of only a simple tool such as a screwdriver, pliers, or a wrench.
"RETURN PIPING" means that part of the piping between the
				  filter and the pool or spa through which passes the filtered water. (This
				  piping frequently is referred to as "effluent piping".)
"ROPE AND FLOAT LINE" (transition rope) means a continuous
				  line not less than one-fourth (1/4) inch in diameter that is supported by buoys
				  and attached to opposite sides of a pool to separate the deep and shallow
				  ends.
SECTION R326.2.16 DEFINITIONS "S".
"SALINE WATER" means water having a specific conductivity in
				  excess of a solution containing six thousand (6,000) parts per million of
				  sodium chloride.
"SEPARATION TANK" means a device used to clarify filter rinse
				  or wastewater. It is sometimes called a
"reclamation tank".
"SEPTUM" means that part of the filter element consisting of
				  cloth, wire screen, or other porous material on which the filter cake is
				  deposited.
"SHALLOW AREAS" means those portions of a pool ranging in
				  water depth from two (2) to five (5) feet.
"SKIM FILTER" means a surface skimmer combined with a vacuum
				  filter.
"SPA" means any spa that incorporates hot water jets, cold
				  water jets, aeration systems, or any combination of the same for
				  hydromassage.
"SPA, PERMANENT" means a spa in which the water-heating and
				  water-circulating equipment is not an integral part of the product. Permanent
				  spas may employ:
1. separate
				components such as an individual filter, pump, heater, and controls;
				or
2. assembled combinations of
				various components.
"SPA, PORTABLE, RESIDENTIAL" means a spa in which all
				  control, water-heating, and water-circulating equipment is an integral part of
				  the product. Portable residential spas may be permanently wired or
				  cord-connected. The spa shall be movable and aboveground.
"SPRAY RINSE, MANUAL" means a spray system intended to be
				  used manually for the washing of filter aid or accumulated dirt, or both, from
				  a filter surface either in place or after removal from the filter tank. This is
				  usually accomplished by means of a hose and nozzle.
"STATIC SUCTION LIFT" means the vertical distance in feet
				  from the center line of the pump impeller to the level of water in the
				  pool.
"STEPS" means a tread or series of treads extending down from
				  the deck and terminating at the pool bottom. "STEPS, RECESSED" means a step or
				  series of steps that are recessed so that all risers are located outside the
				  pool wall.
"STEPS, RECESSED STEPS, LADDERS, AND RECESSED TREADS" means
				  methods of pool ingress and egress that may be used alone or in conjunction
				  with one another.
"STRAINER" means a device used to remove hair, lint, leaves,
				  or other coarse material on the suction side of a pump.
"SUCTION PIPING" means that portion of the circulation piping
				  located between the pool structure and the inlet side of the pump and usually
				  includes the following:
1. Main outlet
				piping.
2. Skimmer
				piping.
3. Vacuum piping.
4. Surge tank piping.
"SURFACE SKIMMER" means a device designed to continuously
				  remove surface film and water and return it through the filter as part of the
				  recirculation system, usually incorporating a self-adjusting weir, a collection
				  tank, and a means to prevent air lock of the pump. It is sometimes referred to
				  as a "recirculating overflow", a "mechanical", or an "automatic
				  skimmer".
"SWIMMING POOL" means any artificial basin of water
				  constructed, modified, or improved for wading, swimming, or diving. The term
				  does not include artificial lakes. The term includes the following:
1. "SWIMMING POOL, IN-GROUND" means any pool
				whose sides rest in partial or full contact with the earth.
2. "SWIMMING POOL, ON-GROUND" means any pool
				whose sides rest fully above the surrounding earth.
3. "SWIMMING POOL, RESIDENTIAL" means any
				in-ground pool or on-ground pool capable of a water depth greater than
				forty-two (42) inches (one thousand sixty-seven (1,067) mm), and all pools
				installed inside a residence, regardless of water depth, whether or not served
				by electrical circuits of any nature, and which is intended for noncommercial
				use as a swimming pool by not more than two (2) owner families and their
				guests.
SECTION R326.2.17 DEFINITIONS "T".
"TOTAL DISCHARGE HEAD" means the value in feet of water that
				  a pump will raise water above its center line.
"TOTAL DYNAMIC HEAD" or "TDH" means the arithmetical
				  difference between the total discharge head and total suction head (a vacuum
				  reading is considered as a negative pressure). This value is used to develop
				  the published performance curve.
"TOTAL DYNAMIC SUCTION LIFT" or "TDSL" means the arithmetical
				  total of static suction lift, friction head loss, and velocity head loss
				  working on the suction side of the pump.
"TOTAL SUCTION HEAD" means the value in feet of water that a
				  pump will lift by suction.
"TOXIC" means having an adverse physiological effect on
				  humans.
"TRAP" means a fitting or device so designed and constructed
				  as to provide, when properly vented, a liquid seal that will prevent the back
				  passage of air without materially affecting the flow of sewage or wastewater
				  through it.
"TRIMMER VALVE" means a flow adjusting device that is used to
				  proportion flow over the skimming weir and flow through the main suction line
				  from the main outlet or the vacuum cleaning line.
"TURNOVER TIME" means the period of time required to
				  circulate a volume of water equal to the pool capacity. SECTION R326.2.18
				  DEFINITIONS "U".
"UNDERWATER LIGHT" means a fixture designed to illuminate a
				  pool from beneath the water surface, further defined as:
1. "DRY NICHE LIGHT" means a light unit
				placed behind a watertight window in the pool wall; or
2. "WET NICHE LIGHT" means a watertight and
				water-cooled light unit placed in a submerged, wet niche in the pool wall and
				accessible only from the pool.
"UPPER DISTRIBUTION SYSTEM" means those devices designed to
				  distribute the water entering a permanent medium filter in a manner so as to
				  prevent movement or migration of the filter medium. This system shall also
				  properly collect water during filter backwashing unless other means are
				  provided. SECTION R326.2.19 DEFINITIONS "V".
"VACUUM PIPING" means the piping from the suction side of a
				  pump connected to a vacuum fitting located at the pool and below the water
				  level to which underwater cleaning equipment may be attached.
"VELOCITY" means a measurement of the motion of liquids
				  usually expressed in feet per second.
"VERTICAL" means a truly plumb line of surface running
				  perpendicular to the plane of the horizon. SECTION R326.2.20 DEFINITIONS
				  "W".
"WADING AREA" means the portions of a pool having water
				  depths of two (2) feet or less.
"WALLS" means interior pool wall surfaces consisting of
				  surfaces from the vertical to a forty-five (45) degree slope.
"WASTE PIPING" means piping that conveys wastewater.
"WATERLINE" means one (1) of the following:
1. The waterline for the skimmer system shall
				fall in the midpoint of the operating range of the skimmers.
2. The waterline for the overflow system
				shall be established by the height of the overflow rim or the mid-level of
				surge weirs, if present.
"WIDTH OR LENGTH" means the actual water dimension taken from
				  wall to wall at the waterline.
"WINTERIZING" means the procedure for preparing pools from
				  freezing weather. The term includes chemical treatment of the standing water,
				  plus physical and chemical protection of the pool and its equipment against
				  freezing.
"WORKING PRESSURE" means the maximum operating water pressure
				  recommended by the manufacturer.
SECTION R326.3 STRUCTURAL DESIGN.
SECTION R326.3.1. Prior to construction, rehabilitation, or
				  alteration of a permanently installed residential pool, plans and
				  specifications shall be submitted to the local authority when required by local
				  ordinance for review, approval, and issuance of a permit to construct or
				  rehabilitate.
SECTION R326.3.2. The structural design and materials used
				  shall be in accordance with generally accepted structural engineering
				  practices. Sand or earth shall not be permitted as an interior finish in a
				  swimming pool.
SECTION R326.3.3. In all outdoor pools, the pool shell and
				  appurtenances, piping, filter system, pump, motor, and other components shall
				  be so designed and constructed to facilitate protection from damage due to
				  freezing.
SECTION R326.3.4. The surfaces within the pool intended to
				  provide footing for bathers shall be designed and constructed to provide a
				  slip-resisting surface. The roughness or irregularity of such surfaces shall
				  not provide an abrasion hazard to the feet during normal use.
SECTION R326.3.5. The colors, patterns, or finishes of the
				  pool interior shall not obscure the existence or presence of objects or
				  surfaces within the pool.
SECTION R326.4 MATERIALS OF CONSTRUCTION.
SECTION R326.4.1. Swimming pools and all appurtenances
				  thereto shall be constructed of materials that:
1. are nontoxic to humans and the
				environment;
2. are impervious and
				reasonably enduring;
3. can
				withstand the stresses that the pool was designed to receive;
4. will provide a watertight structure with a
				smooth and easily cleaned surface without cracks or joints, excluding
				structural joints; and
5. a
				smooth, easily cleaned surface finish shall be applied to, attached to, or
				installed.
SECTION R326.5 DIMENSIONAL DESIGN.
SECTION R326.5.1. No limits are specified for the shape of
				  swimming pools except that consideration shall be given to the shape from the
				  standpoint of safety and circulation of the swimming pool water.
SECTION R326.5.2. 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.
SECTION R326.5.3. There shall be construction tolerances
				  allowed on all dimensional designs. Overall length, width, and depth in the
				  deep end may vary plus or minus three (3) inches. All other overall dimensions
				  may vary plus or minus two (2) inches unless otherwise specified.
SECTION R326.6 WALLS.
SECTION R326.6.1. Walls shall not be greater than eleven (11)
				  degrees from plumb for a minimum depth of two (2) feet nine (9) inches from the
				  waterline in deep areas or two (2) feet three (3) inches in the shallow areas.
				  Below these depths the wall may be curved to join the floor. An exception to
				  this section is walls on Type 1 and special purpose pools shall be plumb as is
				  shown in Section R326.10.9, Figure R326.10(5).
SECTION R326.7 FLOOR SLOPE.
SECTION R326.7.1. Floor slopes shall be in compliance with
				  the following:
1. All slopes shall be
				uniform.
2. The slope of the floor
				from the shallow end wall towards the deep end shall not exceed one (1) foot in
				seven (7) feet (1:7) to the point of the first slope change.
3. The point of the first slope change shall
				be:
3.1. defined as the point at which the
				floor slope exceeds one (1) foot in seven (7) feet (1:7); and 3.2. not less
				than six (6) feet from the shallow end wall.