Aquatic Technology Pool & Spa, "Creating Water as Art."™

Aquatic Technology Pool & Spa, "Creating Water as Art."™
Pools as an art form - the way it should be!

Wednesday, August 14, 2013

Technology resolves swimming pool ADA compliance issues

Technological advancements have resolved inherent dangers of swimming pool lighting around disabled swimmers.

It's a matter of sensitivity

Having consulted, designed, built and remodeled a number of aquatic facilities specifically for disabled persons, I have become aware of a number of issues that most swimming pool designers and builders would never consider - burns.

The lenses on underwater incandescent swimming pool lights, though water cooled, can get blistering hot.  A normal person's nervous system would sense the heat and they'd move their limbs away from the intense heat.

However, a paralyzed person does not feel their tissue burning or blistering from contact with the hot glass lens.

Technological innovation to the rescue

Two decades ago, fiberoptic lighting was introduced to the swimming pool industry.  I immediately realized that this was the solution to the safety issue of hot glass lenses.  

However the lumen output of fiberoptics were limited.  To achieve the minimum illumination required in a pool or spa required many lights, large fiberoptic cables and a lot of illuminators (light sources).  Sometimes additional overhead lighting was also required.

In the past few years LED lighting has advanced to the point where it is now a viable alternative to incandescent bulbs.  Bubble LED's never achieved the light output or lifespan that was required in a commercial application.  However, CREE (chip) LED's now rival the output of quartz halogen lighting, without the heat or energy consumption.

The dangers of burns from underwater pool lights can now simply be avoided through the use of CREE led light fixtures.  And because they are low voltage fixtures, they are also inherently electrically safe.  GFCI and electrical bonding protection is not required on most of these fixtures.

Safety through innovation and application!

Paolo Benedetti - Aquatic Artist 
"Creating water as art."™ 
Aquatic Technology Pool and Spa ©www.aquatictechnology.com

Friday, July 26, 2013

Fixed price swimming pool designs are a scam

It is impossible to deliver a fixed price swimming pool!  There are just too many variables...

Every property is different

The pricing model cannot hold true for every property.  There are just too many variables...
The soil conditions vary from lot to lot in the same neighborhood and the required strength of the concrete shell will vary significantly.
Access to property and the required excavation equipment will differ.
The distance to the dump site for the dirt spoils varies, as do the fuel and trucking costs.
The size of properties and setback limitations are different.
The lines of sites from the owners & neighbors property differ.
Existing utilities and locations vary and may require upgrading or longer installation runs.

Hydraulics, Safety and Energy Efficiency

Piping sizes cannot be the same for ever project.  The longer the pipe lengths the more restrictions.  The pipe diameters need to be increased to reduce the added friction.

Using the same size pipe, regardless of the pump size or distance creates excessive line velocities.  This equates to an unsafe condition at the suction inlets and potential hair or bather entrapment.

Excessive line velocities are also a tremendous waste of energy.  The pumps must work harder and hotter to overcome this back pressure.  Destined for failure from the start....

Generic Engineering


The structural engineering used on these projects is a generic, a one size fits all plan.  They meet the MINIMAL requirements, but are not guaranteed to meet the conditions for your site.

How can they do this?  Because most building departments do not enforce the International Building Code requirement that the structural engineering be designed to overcome the surcharges placed upon the structure.  Some cities (Los Angeles for example) require soils reports with swimming pool plans and structural engineering.  They require that the soils engineer review the structural plans to ensure that the engineering meets his minimum requirements.

Simply put, the swimming pool must be strong enough to prevent structural failure (cracking) from loads placed upon the shell.  These loads come from adjacent structures & buildings, up or down slopes, retaining walls, winds, snow, saturated soils, expansive soils, uplifting soils, seismic events, surf or tides - anything that will place a force on the pool.

Generic structural engineering is totally worthless, if the structural engineer has not reviewed the site and a soils report (geotechnical investigation).  The structural engineer simply cannot validate the strength requirements without a soils report that defines the conditions below the surface.  

These "package" price pools totally disregard the strength requirement, by placating homeowners with a pool builder's own "structural warranty."  This warranty does not warrant the pool against cracking - only that the pool will "hold water."  That means when the pool does crack, they will patch only the crack - thereby restoring the watertightness.  And, when they patch the crack, they will not repair the plaster surface.  

Would you accept cracking of your home's foundation, a dam above you in a canyon or a bridge you drive on?  Of course not, but they seem to think that this is acceptable.

Price Changes

You want a site specific structural engineering?  That's extra!
You don't want the pool equipment 10 feet from the pool?  That's extra!
You want to change the shape of the pool or steps?  That's extra.
You want something other than white plaster?  That's extra?
Oh, you wanted the spa heated?  A heater is extra.
You want a gas line to feed fuel to the heater?  That's extra too.
You want a tile other that the 6 blue tiles we offer?  That's extra.
Oh, you want remote controls of the pool & spa?  That's extra too!
You want drains in the pool deck?  Those are extra?

It is the old bait and switch routine to which we all try to avoid.

Remember, YOU GET WHAT YOU PAY FOR!

Paolo Benedetti 
Aquatic Artist, Watershape Consultant, Expert Witness 
"Creating water as art."™ 
Aquatic Technology Pool and Spa 
©www.aquatictechnology.com