Section 6-9 - Flumes; Design and Construction (a) Each flume must meet the following design and construction parameters: - (i) It shall be watertight;
- (ii) The surface must be inert, nontoxic, smooth and easily cleanable;
- (iii) All curves, turns and tunnels within the path of a flume shall be designed so the impact of users with the walls of the flume or ceiling of a tunnel does not present a hazard;
- (A) The flume shall be banked so that forces on the bathers keep them safely inside the flume under all foreseeable circumstances of operation;
- (I) Bathers must not become airborne.
- (B) In the curved sections of a flume, the design of the wall of the flume must cause the outward thrust of the body of the bather to be dissipated towards the centerline of the flume.
- (iv) All slopes in a flume must be designed so the speed of the bathers does not reach a point at which a safe equilibrium of dynamic forces cannot be maintained on any curve or turn in the flume;
- (v) In sections of a flume where bathers can stop, provisions must be made by design or modification to prevent bathers from falling out of the flume;
- (vi) The construction, dimensions and methods of mechanical attachment of a flume must provide a smooth and continuous surface through the entire length of the flume;
- (A) Any misalignment of joints in a sectional flume must not exceed one-eighth (c) inch.
- (vii) The walls of any flume must be designed:
- (A) So the continuous and combined action of hydrostatic, dynamic and static loads, as well as normal environmental deterioration do not damage the flume bed to the extent of creating a structural failure that presents a hazard of injury to users; or
- (B) So that they do not require frequent patch repairs that may weaken the structural integrity of the flume.
(b) If a tube-type flume is used, it must be designed or ventilated to prevent a hazardous concentration of toxic sanitizing fumes under all circumstances of operation.