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Springboards

Springboards can be mounted on a stand or on a concrete platform.

When a stand is used it is critical to have the proper elevation.  This can be a challenge if the deck is sloped.  Duraflex does provide 3/16” phenolic shims should they be needed.  It is their recommendation that no more than 1/2” of shims be used for any application.

Counsilman - Hunsaker follows Duraflex’s recommendations for concrete platforms that use springboards are 2’-2” for 1-meter and 8’-9” for 3-meter.

In some jurisdictions, the building official has suggested the review of concrete stairs leading to platforms for springboard short stands is under the umbrella of IBC.  IBC states that a maximum riser height is 7” and maximum tread width is 11”, both of which are lower maximums that found in most codes.  CH should follow IBC for these diving designs.  In the past where we have exceeded the maximums allowed by IBC, it has been successfully argued on at least three different occasions in OH, VA, and WI that the concrete stair system is a considerable improvement on the industry standard of care, both from a safety and durability perspectives, which is a manufactured stand.  (Referencing images and cut sheets of a Durafirm stand) There are two intermediate steps bridging the elevation difference from the deck to the top of the one meter diving board surface (+3’ 3-3/8”).  There is a 10 inch “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.  It should also be noted that each step only has a “tread” depth of 4-3/8” at the deepest (center) point.

o    Refer to appropriate standard (FINA, NCAA, US Swimming & Diving or NFSHSA) for depths and tolerances.  CH Standard:  For one-meter springboards, a diving well depth of 12’-0” is the minimum; a depth of 12’-6” is preferred.  The minimum depth for all diving wells is 11’-2” at 26’-0” from the end wall.  If the facility has both a 1-meter and 3-meter diving stand, locate the 1-meter stand next to spectator seating.  For 3-meter springboards, a minimum diving well depth of 13’-0” is required, while a depth of 13’-6” is preferred.

Per NCAA codes, require the diving board overhang from pool wall to plummet to be 5’-0” min. or 6’-1” preferred.  CH standard is 6’-0” from pool wall to plummet for diving board overhangs.  If we were to show a smaller overhang than 6’-0”, it would require more deck space between the diving board and the wall behind, since CH requires a 4’ minimum of unobstructed deck behind the diving stand.

A 5’-0” minimum width of unobstructed deck behind the diving stand is required by most states – sometimes 4’-0” is allowed.

If a facility is planning on installing a diving stand, the facility’s deck must follow the other deck contour and be free from future anchors.  A bump-up is not allowed.  Spacers to level the stand must be provided later.

Duraflex offers stainless steel Hilti anchor inserts in case the contractor would prefer to pour the deck first and the go back, drill holes, and epoxy the anchors in.  This methodology serves to save on installation time and money.  However, the anchors will still need to be bonded so the PM should be aware of this requirement before recommending it to a contractor or an owner.  Hilti anchors may also be easier to use on retrofits.

The expected loads and forces generated by a diver on typical 16’ boards are as follows:

  • Load testing of Durafirm diving boards was done by both static and dynamic methods.
  • A 235 lb diver, by repeated bouncing of the board to gain maximum height ("trampolining the board") depressed the board 1.09 meters. By static loading the same board, Durafirm arrived at 1500 lbs to depress the board the same distance.
  • The board effects leverage of approximately 2:1, so the upload on the anchor end would be approximately 3,000 lbs. This force is a "jerk lift" load on the rear assembly of the stand.  An equivalent compression (with some of the force: rearward shear) is estimated for the front assembly ("main support") of the stand.

Pull-out testing of Durafirm’s bronze anchor was done for Barrish, Aldrich & Schroeter Consulting Structural Engineers of Sacramento CA by Lowry Testing Laboratories. Durafirm quoting the test report:

  • As requested, we performed a pull-out load test on January 17, 1979 on one of three bronze anchor units embedded in a concrete slab constructed for this test at the subject project. This type of anchor unit is proposed for use in the diving tower footings.
  • "The anchor unit in the middle of the three was loaded to a pull-out load of 16,200 lbs when the 5/8" diameter mild steel bolt being used in the loading system failed. The reaction load was applied to the test slab at two points approximately 22 inches away from the anchor unit.
  • "Results showed the tested anchor unit and steel bolt withstood a 16,200 lb load with no apparent distress in the anchor or surrounding concrete. Under the circumstances, no further testing was performed on this or the other two anchor units."
  • The Durafim bronze deck anchor is our design and certainly our recommendation for facilities that are pouring new decks and installing our 1M and 3M stands, and for constructing pedestals or platforms for installation of our short stands. Our factory has these anchors in stock and is able to ship UPS ahead of the shipment of the stands to be installed.
  • We will ask you for information about the installation when bronze anchors are ordered so that we can provide you with a full-size paper layout for the positioning of the anchors. From the paper layout you will need to make a plywood template to set and level the anchors in your deck. (see anchor installation instructions for 1M, 3M, or short stand.)
  • Because the position of the fulcrum/main support is different, relative to the anchor/ladder assemblies for different lengths & models of our diving boards, we will need to know the length & model (Duraflex or Maxiflex) of the board to be installed.
  • To send a layout showing the anchor location points we will need to know the deck elevation above water level, rate and direction of deck slope ( example: 1/4" per foot/slopes away) and the board model to be installed on our 1M and 3M Stands.
  • For our short stands we recommend the bronze anchors without exception. Do not construct your pedestal or platform without first ordering our bronze anchors.

Use Maxi-flex “B” boards only on high-end facilities including Universities and High Schools.  Use Duraflex diving boards for all other applications.

Consider the use of SoftSide safety padding by RenoSys, or similar product for fall zones behind 3-meter diving board ladders. The SoftSide product looks best if flush with the deck.  The project engineer should coordinate with the manufacturer during design for special considerations and dimensions.  The manufacturer should provide recommendation on safety padding thickness to address fall protection.  If possible, a standard ships ladders should not be used on 3-meter boards.  The industry standard for 3M boards is Duraflex and most divers want to use this board and stand.

According to Steve Volmacke at springboardsandmore.com, there is no safe and effective way to secure a 1 meter board up or away from the pool.  Options are to remove the board or to use a pulley assembly from the ceiling.  Such a pulley assembly is not available for purchase.  Durafirm was sued when a girl’s hand was crushed when she and her coach were lowering a board back down to the fulcrum.  They now say not to tip boards.  Counsilman-Hunsaker should be careful with what information is conveyed to the owner.

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