Category Archives: Swimming

Springboard Diving

As a full-service aquatic consulting firm, we strive to design facilities that meet the needs of all user groups. While many aquatic sport facilities revolve around competitive swimming, we certainly do not want to neglect diving. While most university and high school teams only have 5-10 divers on their roster, they can be a secret weapon to propel a team over the competition. For instance, Purdue University finished in 13th place at the 2017 NCAA Championships with a final score of 106.5. The Boilermakers, Purdue’s diving team, scored 94.5 of the total 106.5 score for Purdue. Without the diving team, Purdue would have finished tied for 32nd place. Clearly, consideration should be given to a facility’s diving amenities.

Coincidentally, Purdue has one of the premier diving training facilities in the country, which includes a separate warm water diving pool with a massive 1-meter, 3-meter, 5-meter, 7.5-meter, and 10-meter diving tower. This facility has even attracted athletes like Olympic platform diving medalists Steele Johnson and David Boudia to train and compete at the university. While not every facility has the capacity or need for a platform as elaborate as Purdue’s, there are subtle ways to make your facility stand out when it comes to springboard diving.

There are two ways to mount a 1-meter or 3-meter springboard: on a stand or on a concrete platform. We tend to see a prefabricated, manufactured stand more often than anything else. These stands are made of heavy-duty aluminum and anchored to the deck using bronze deck anchors. The stands include handrails on both sides, as well as a ladder at the rear end of the board.

Shelby Bartlett, the four-time NCAA Zone qualifier and recently-appointed head diving coach at Saginaw Valley State University said that she prefers concrete platforms.

“They provide a more stable surface. Manufactured stands sometimes tend to shake, especially if they are older. And if the hand railings extend past the fulcrum, you can sometimes hit your hand on your walk down the board,” said Bartlett.

While manufactured stands are a good solution for low-level competition, Counsilman-Hunsaker has found that most high-level competitors prefer the more permanent solution that concrete platforms provide. These platforms also tend to be safer to travel up and down on.

Concrete platforms can be customized depending on the number and type of boards needed. Typically, we recommend providing two of each type of board to allow for multiple divers to practice simultaneously. Reinforcement for concrete platforms is designed by a structural engineer and is tested under both static and dynamic loads. A manufactured short stand is mounted to the concrete platform using bronze anchors and can come with or without handrails. If owners would prefer no handrails, they can be moved to surround the outside concrete platform to provide additional security on the elevated surface. This eliminates the risk of hands hitting the rails during divers’ approaches. In some jurisdictions, the concrete stairs leading to platforms fall under the design requirements of the International Building Code (IBC), which states that a maximum riser height for stairs is 7” with a maximum tread width of 11”. Both measurements are lower than that of most codes.

Counsilman-Hunsaker’s designed concrete stands have two intermediate steps bridging the elevation difference from the deck to the top of the one meter diving board surface.  There is a 10” riser difference between the deck and the first step, as well as between the first and second steps.  Between the second step and the top of the diving board, there is a 19-3/8” difference. Also, each step only has a “tread” depth of 4-3/8” at the deepest point.

While manufactured stands do not fall under the IBC, Counsilman Hunsaker can design custom stands to fit the gutter profile and meet requirements to provide a safer springboard experience.

Being leaders in aquatic design means presenting clients with all of their aquatic sport facility options. Determining the right diving amenities for you is just one of the many decisions we help make during the programming phase of design. Counsilman-Hunsaker has the tools to help guide your aquatic design to meet all user group needs.

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Underwater Pool Lighting: What You Need to Know

Underwater pool lighting is a surefire way to add to the wow factor of your pool. Pool lighting can enhance a pool’s visual appeal, add visibility or even change the overall mood of the pool with lights that change colors. With recent advancements in underwater lighting technology, it is important to understand the proper terminology, code standards and industry trends in order to successfully navigate the sometimes confusing world of underwater pool lighting.

Design of underwater lighting for the commercial pool industry has typically been based upon watts per square foot of water surface area. Wattage ratings for pool lights, however, are nearly obsolete, since incandescent lights are becoming a thing of the past. The latest and greatest lighting trend taking over the aquatics industry is light-emitting diode (LED) lighting. LED lights use much less energy and can last five times longer than a comparable incandescent light.

Wattage is a measure of how much energy a light bulb uses. In fact, it has nothing to do with the actual brightnLEss of a light bulb. Over time, consumers tend to gain a general idea of how bright a 60-watt light bulb is compared to a 100-watt light bulb. Because of this, people tend to associate the brightness of a light bulb based with its wattage rating. When looking at incandescent lights, this method for comparing brightness is useful. However, where other types of lights like LEDs are concerned, this method is useless.

The correct unit of measurement to use when measuring brightness is lumens. A lumen measures the amount of light that is emitted from a light source. One lumen is equal to the amount of light emitted from a standard birthday candle from one foot away. The ultimate goal is to produce the most light (lumens) with the least amount of energy (watts).

Many of the older swimming pool codes require 1.0 or even 0.5 watts/square foot of water surface area. Updated codes have taken the new aquatic trend of using LED-style lights into account, and have converted their measurement requirements to lumens/square foot. According to section 4.6.1.5.1 of the Model Aquatic Health Code, “Underwater lighting, where provided, shall be not less than eight initial rated lumens per square foot of pool water surface area.”

The location of underwater light fixtures in a commercial pool setting is vital to a safe and a visually-pleasing swimming pool. Depending on the shape and the intended use of the pool, a good general rule of thumb is to install light fixtures on opposing walls. For competition pools, it is not recommended to install fixtures at the ends of the pool, as swimmers need space for flip turns during competitions. It is important to ensure all tripping hazards and pool egress/ingress locations are adequately illuminated. This includes things like stairs, recessed steps, ledges and any slope transitions. Additional fixtures may be needed for swimming pools with deep water. For safety concerns, it is imperative that the entire floor of the pool is easily visible from the deck.

As fast as technology is progressing, it is important to stay up to speed on industry trends and terminology, even when it comes to items as simple as pool lighting. Knowledge of industry standards for lighting levels and fixture locations will guide owners to make informative and safety-driven decisions when lighting their pool. Luckily, Counsilman-Hunsaker is there to help ensure you have the latest industry knowledge available to you. Check out some of our latest projects and see our expertise today!

Starting Blocks and Water Depth: Is Your Pool Safe?

When it comes to the world of competitive swimming, there are stringent guidelines that everyone involved in the pool design process must take into consideration. This is especially true for water depths beneath starting blocks.

Starting blocks are raised platforms typically mounted on the pool deck at the end of competitive swimming lanes. In most installations, the height of the starting block platform above the water surface is less than 29 ½” above the water surface. Swimmers mount the blocks and push off from a crouched position, using the force from their lower bodies to launch into the pool. We’ve seen many technological advancements for modern day starting blocks, with the most recent changes being the addition of rear footrests and side handles, which can have an impact on a swimmer’s overall performance.

Because swimmers are diving with a lot of force, it is crucial to ensure that the water beneath the starting blocks, as well as a portion of the pool length ahead of the swimmer, is deep enough that swimmers will not injure themselves. Diving into water that is too shallow can result in devastating injuries.

Credit: Indiana University-Purdue University Indianapolis

If a swimmer hits their head on the bottom of the pool, a massive amount of force is transferred to the spine. This force can sometimes collapse the vertebrae that encircle the spinal cord, potentially leading to paralysis or worse. For this reason, it is important for an appropriate water depth to be maintained at the ends of pools where swimmers are diving into the water. In addition to this safety concern, sufficient water depth beneath a starting block can provide a swimmer with the best opportunity to maximize the performance of their start.

USA Swimming, the national governing body of competitive swimming in the United States, has its own set of racing start standards that vary based on swimmer experience and training. In pools with water depths less than 4’-0” at the starting end, all swimmers, regardless of skill level, must begin from within the water. In these instances, backstroke starting ledges are also not permitted. For pools that have water depths between 4’-0” and 6’-0”, a swimmer can utilize a starting block if they have been certified by a USA Swimming Coach. For water depths greater than 6’-0”, starting blocks are allowed for all swimmers, regardless of skill.

FINA, which serves as the international governing body of competitive swimming, has its own standards. The minimum depth at the pool’s end has to be 1.35 meters (about 4’-5”). But when it comes to all Olympic and World Championship events, pool depth must remain a minimum of two meters (about 6’-6”) throughout the entire field of play, with three meters (about 10’-0”) preferred.

It’s important to note that various industry organizations and jurisdictional health and safety departments all have their own defined standard, as well as several varieties of the standard based on different factors. For instance, some organizations have a defined range of water depth standards that are dependent upon the pool type or user. Others take it as a case-by-case basis, and vary the depth as appropriate. Additionally, there are local, state and municipal regulations that need to be considered. What is too shallow for one group may be sufficient for another.

At Counsilman-Hunsaker, we make things simple by recommending a minimum water depth requirement of 6’-0” (with 7’-0” preferred), that is to be maintained a minimum of five meters (16’-5”) from the end wall. This is a universal standard for all pools we work on, regardless of pool type or user, that ensures your pool will be competition-ready. These recommended water depths will also allow a swimmer to utilize a starting block with minimal risk to their health and wellbeing.

Swimmer safety is a top priority for Counsilman-Hunsaker. We take time to assess our systems and specifications to ensure we are designing pools that are not only functional and aesthetically-pleasing, but also keep swimmers safe and able to pursue aquatics for life. Be sure to follow us on social media for more aquatic design and operations information!