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Mobile Floors

Mobile floors fall into the category of motorised equipment and must be designed in compliance with European standard for “machines” and the regulation standards of swimming pools – EN13451 especially paragraph 11. We supply a certificate of compliance to the European Community Standards “CE” for all our equipment.

Mobile floors allow the manager of the pool to adjust the depth of the pool. In a minimal amount of time he can change its use from sports training and competitive swimming, to baby and toddler swimming sessions, school swimming lessons through to aquaerobics and aquabike sessions.

For diving pits, it allows the pool manager to restrict access to deeper depths for divers without sufficient training.

There are several types of mobile floors: suspended, floating and supported. We can offer all three solutions, but in most cases the final option chosen is the supported floor.

Supported Floors

The vertical movement can be provided by pinion wheels moving on rack guides fixed vertically to the pool walls.

The movement can also be achieved by pantograph A-frame lifting jacks, these are fixed to horizontal threaded rods fixed to the pool floor and the simple moving apart or tightening of the jacks via the rotation of the rod will lift or lower the floor.

Floor on pantograph jacks  Floor on rack and pinion gear

It is this system that we recommend for the vast majority of sports, therapeutic, learning or recreational pools, because its deck can be adapted to the most complex pool shapes. There are many advantages to this system:

  • It will operate even when the tank is empty. This is useful when purging the pool since it will function in dry conditions, so it can be moved vertically to allow for full cleaning and servicing of the pool walls and mobile floor, and can also serve for example in the diving pits, as a safe platform for the cleaning and maintenance team avoiding the need for scaffolding or access ladders.
  • The mechanism allows for spare space under the floor. A trapdoor in the decking allows the passage of a cleaning robot for a regular cleaning of the bottom of the pool.
  • Capable of supporting up to 60kg/m² when dry, it fully complies with all EU EC standards and the platform level cannot deviate more than 1cm from one side to the other.
  • The guide rails ensure that a constant 8mm gap is maintained between the moving floor platform edge and the perimeter pool sides
  • We can specify a platform decking in a stainless steel finish but our standard decking elements are made of polyester with a polyurethane foam core. This lightens the structure and reduces the mechanical stress and wear points, which ensures a long life for our equipment. It also reduces surface evaporation and heat loss to the water in the raised position and so helps regulate air temperature and water heating in the pool hall.
  • The mobile floor is highly stable, so it can be walked on and used as a dry area when in high position. This can increase the decking area if the maximal loads are respected and also acts as fall protection safety device. We recommend to systematically put the floor in its high position when the pool is out of use.

Floating floors

The platform is lighter than water; the decking is made of floating caissons and is held to the bottom of the pool basin by a system of cables. There are several disadvantages to this system. The pull on the cables and the pool floor is very high (e.g. 170 tons for a 21m X 7m floor size), and the passage of these cables through pulleys generates stress fatigue and added wear requiring regular replacement of cables.

Sometimes divers are required to re-adjust cable tension. When purging the pool, the system requires extra handling to install braces to hold the floor up at a certain level, so to allow access below the floor for maintenance and inspection.

The 13451-11 standard states that a floor must withstand 60kg / m² and the level shift from one side to the other of the floor must not exceed 1cm. It is difficult to meet these obligations with this system: for example it is not possible to reliably predict the number of users moving across the floor at one time, and the movements they will induce during aqua gym sessions or at the end of a session.

Suspended floor

Heavier than water, the decking is upheld by cables. The cables are shorter and are submitted to less strain than with a floating floor, their replacement is therefore less costly and less frequent.

The passage of the cables through the pool wall cannot be done in a strictly watertight way, so this system presents the disadvantage of not being able to be hidden in the technical gallery since the pulleys must be installed above the waterline. It is rarely used now that pools with overflow systems are becoming widespread.