Replacing Diving board anchor bolts - Are SS wedge bolts a good option?

mikeingeorgia

Active member
Jul 3, 2015
42
Atlanta
My diving board anchor bolts are horribly rusted. I've found that my local fastenal has 1/2" anchor wedge bolts with a pull out strength of 4,400 pounds each. That seems sufficient, so what do you think about it as an option?
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,238
Tucson, AZ
Being that a failure could really hurt someone, I do not think anyone at TFP would recommend anything outside the manufactures recommendations. Perhaps contact them and ask.
 

Zrock

Well-known member
Jun 21, 2016
280
bc
What does the manufacturer recommend? I've never looked into what mounts a diving board. The wedge bolts are only going to be as strong as your concrete. For the first little while they will continue to tighten everytime someone uses the diving board. The wedge action could create enough pressure to actually split your concrete. Have you looked into the epoxy style anchors? I have used them for other things and they hold tight once set..
 

Donldson

TFP Expert
LifeTime Supporter
Jun 12, 2009
4,589
NW Ohio
Anyone else have any thoughts that need not represent the owner of the website?
Yep, call the manufacturer and see what they say. Don't know why you feel that is some impossible dream, they probably have a phone number and someone to answer it and everything. This advice is my own and 100% not affiliated with the owner of the website, since that seems to be important to you.
 

proavia

LifeTime Supporter
TFP Guide
Feb 6, 2015
1,991
Chandler AZ
Anyone else have any thoughts that need not represent the owner of the website?
I don't think the member who first responded is representing the owner of the website - even if he is a moderator on this forum. Pretty much any member is going to recommend the safest way to tackle your project.

Honestly, I wouldn't take a chance on anything outside of the manufacturers recommendations. While those wedge bolts may have a pull out strength of 4400 pounds, they may not hold in the concrete or other substance they are installed in. Also, I doubt they were tested for the side loads that would be encountered from people jumping on and moving around on the diving board - especially over time.

There is a lot more load put on the mounting area due to the distance from it to the end of the board, the weight of the person using it and several other factors.

Another consideration - if someone were to get injured because of the failure of the wedge bolts or surrounding mounting area, your insurance company won't pay out because they aren't the approved installation method.

I'd lean toward contacting the manufacturer for their take on it. Also, talking with a local pool builder who installs diving boards may yield some other options.
 

mikeingeorgia

Active member
Jul 3, 2015
42
Atlanta
I'll call them. Nothing personal to the moderators, however I know that there is always a tendency to stay away from potential liability. Sometimes a logical solution exists anyway. It is hard to believe that everyone just repours the slab considering that epoxy bolts are sold by inyo.
 

tim5055

Mod Squad
TFP Expert
LifeTime Supporter
May 11, 2014
11,050
Franklin, NC
The other thing to ask the manufacturer is where does the bonding wire attach. If it uses the bolts you plan on replacing you will need to consider a way to include the bonding wire (which may be burried in the concrete).
 

mikeingeorgia

Active member
Jul 3, 2015
42
Atlanta
Well... Surprisingly they just suggested using an epoxy kit to place new bolts. She said that the epoxy kits include instructions for bonding. However I'm not sure this really serves a purpose due to it being a fiberglass diving board.

I have not found any published data on the pull out strength of epoxy, so I'm not really feeling like I'm on a path to a best solution unfortunately.

- - - Updated - - -

Epoxy Kit | Swimming Pool Parts Accessories | S.R.Smith
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,238
Tucson, AZ
Great to hear that they had a recommendation.

I would be much more comfortable with the epoxy bolts, especially as they are marketed for diving board installation, than I would for wedge bolts where this might be outside their design limits.

There may still be some concerns if the epoxy bolts are longer than your existing deck thickness ... although there should be a footer there already.
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,238
Tucson, AZ
Interesting. The funny thing is that they charge $250 for 3 6 inch bolts and a $35 tube of simpson strong tie epoxy.
Wow, I agree that seems a bit excessive. Personally, I might be inclined to source some grade 8+ threaded rod myself if I could save that much.
 

proavia

LifeTime Supporter
TFP Guide
Feb 6, 2015
1,991
Chandler AZ
Wow - that does seem excessive. But I think you're on to something Mike. Maybe some high grade stainless steel threaded rod, washers and nuts. Take some pics of your progress and post them here.

As for the bonding with a fiberglass board, I think it might have something to do with water making contact via the deck - bathers and splashout can create a circuit between the metal of the board, the pool water and other surfaces. Again, best to be safe - and easier to do now while you are installing the new hardware.
 

mikeingeorgia

Active member
Jul 3, 2015
42
Atlanta
Does the same concern exist about the circuit exist if the entire base is also fiberglass? The only metal is the 3 bolts into the ground and the two that hold the board to the base.

If it does, I'm thinking I can possibly weld a connection to one of the previous bolts, but that would require an additional drilled hole in the bottom of the base which I really wouldn't want if it's not necessary.

I'm thinking that their instructions for the epoxy kit don't say anything about bonding, but I don't know for sure.
 

CJadamec

TFP Expert
Apr 29, 2016
2,390
Quaker Hill, CT
If there is no metal core in the board and no metal in the base there is nothing to bond to. The bolts don't have enough surface to require bonding and they will be imbedded in the bonded concrete deck.
 

tfbrown60

Member
Mar 10, 2016
13
Hurricane , WV
When i saw the $ for the kit, I ordered the simpson epoxy on line and got the ss bolts, nuts, and washers local . Cut the old studs off(not ss) with a grinder ,hammer drilled new holes a couple of inches back and epoxied the new studs in place. Did this a little over a year ago . So far no problems. My board and base are fiberglass, I did not add any bonding . If you did bond the three studs are not connected together with a jig anymore, would you need to run a bond to all three studs ?