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Topic: Boat Bouyancy/Floatation  (Read 1358 times)

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Offline Capt. Hook

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Boat Bouyancy/Floatation
« on: August 30, 2013, 03:20:57 pm »
Been doing a lot of research for my new boat, thought I would share the information I have found.
Herewith the SAMSA requirements
 
« Last Edit: August 30, 2013, 03:29:24 pm by Capt. Hook »
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Offline Capt. Hook

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Re: Boat Boutancy or Floatation
« Reply #1 on: August 30, 2013, 03:27:03 pm »
Here are the materials approved by SAMSA
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Offline isivuba

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Re: Boat Bouyancy/Floatation
« Reply #2 on: August 30, 2013, 04:44:04 pm »
 :tkx: Capt...... :+ cred:

Offline John F

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Re: Boat Bouyancy/Floatation
« Reply #3 on: August 30, 2013, 06:36:37 pm »
Very helpful. Thanks!

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Offline fishingum

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Re: Boat Bouyancy/Floatation
« Reply #4 on: August 30, 2013, 06:57:13 pm »
 :tkx: for the post. Glad to hear sva is also flotation. I bought the sva 45 in 25mm to use as cushioning on my coffin hatches as seating and around the gunnels for cushioning the knees.The salesman at sondor in jhb told me that sva retains its shape much better than spx after being compressed but the downfall is it can't be used as flotation. :dunno:

Offline Slim Dusty

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Re: Boat Bouyancy/Floatation
« Reply #5 on: November 10, 2017, 06:41:31 am »
Morning,

Capt. having read your attached SAMSA Doc's, I cannot find any clause specifying the need to fill HDPE buoyancy bottles with "Beads" (assuming polystyrene type)

Can somebody please shed a little light in this regard...
I own a 16'6 Kincat, 2007 model, which was built when Peter was still alive, I am confident that he would have used the correct HDPE Bottles, as required by SAMSA, when constructing his Ski-boats.

My Factory Buoyancy Certificate, as issued by Z-Craft expired in August of 2017.
I have taken the Boat to a reputable boat dealer, whereby I have now been told that the bottles do not comply, supposedly not HDPE, and are also to be filled with beads, as per SAMSA requirements.

Has anybody else out there had the same issues specifically with a Z-Craft Hull?

Any advice would be appreciated.
« Last Edit: November 10, 2017, 06:21:17 pm by Slim Dusty »

Offline Slim Dusty

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Re: Boat Bouyancy/Floatation
« Reply #6 on: November 10, 2017, 06:22:53 pm »
Well a turn of events, the Bottles are not the approved HDPE bottles, checked myself for peace of mind.
One of the bottles I took out even had a hole in it, not from damage, it was installed as such.

Very Disappointing to say the least, especially from what used to be a stalwart in the Boating Industry.
 swr swr swr

The dilemma now is, do I install Foam, HDPE Bottles, or Sondor Foam below the Deck...
I am swayed towards HDPE Bottles, but would also consider Foam
Can anybody advise on personal experiences with said products and where they have possibly failed or worked successfully.

Thanks...
« Last Edit: November 10, 2017, 06:23:50 pm by Slim Dusty »

Offline fishing mike

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Re: Boat Bouyancy/Floatation
« Reply #7 on: November 10, 2017, 07:39:37 pm »
Hi Dusty
i am currently busy with the same project and my boat was filled with 2l milk bottles. i have drainage plugs on all compartments and therefore might have some water ingress and that eliminates the two part foam.
With new bottles they can only give me a buoyancy  cert. for a year.
The sonder foam does not absorb any water and with a bit of extra cost they will give me a 5 year certificate.
In my opinion it is best to do it properly and use the sondor foam.

Offline Slim Dusty

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Re: Boat Bouyancy/Floatation
« Reply #8 on: November 10, 2017, 09:47:20 pm »

Evening Mike,


2ltr Milk Bottles, bliksem, thatís no good.

Walking around the boat dealer workshop this afternoon, they showed me some of the bottles they had removed from some of the boats they have been working on........

Shocking to say the least,as a boat owner it certainly makes you question what could be under your own boats deck.


Good luck with your buoyancy installation, the Sondor Foam with a 5 year cert. is definitely the way to go, certainly hope it works out for you.


Hopefully you back on the water by December
 :fshn:

Offline shu vawda

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Re: Boat Bouyancy/Floatation
« Reply #9 on: November 15, 2017, 12:58:03 pm »
Hi dusty.


This topic can be quite a dilema as different boats react differntly to bouyancy.For example a butt cat performs poorly if foam is replaced with bottles or sondor but becomes a dream machine if it has foam.I have been through this exercise on my previous boat and the foam added alot of rigidity to the hull.In saying this you have a Z craft which has thick fibreglass and may be fine with bottles but i thick the foam may be better.


On the topic of foam,Installation being done correctly is key.Using good quality foam and a good drainage system will keep you going for years to come.


Hope this helps.


Offline Slim Dusty

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Re: Boat Bouyancy/Floatation
« Reply #10 on: November 15, 2017, 09:55:34 pm »
Well I made my decision, going with the Sondor Foam....
I was not convinced with the bottles.

Holding thumbs that there are no more Gremlins lurking beneath the Deck.

Offline Slim Dusty

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Re: Boat Bouyancy/Floatation
« Reply #11 on: November 15, 2017, 10:01:58 pm »
Hi dusty.


This topic can be quite a dilema as different boats react differntly to bouyancy.For example a butt cat performs poorly if foam is replaced with bottles or sondor but becomes a dream machine if it has foam.I have been through this exercise on my previous boat and the foam added alot of rigidity to the hull.In saying this you have a Z craft which has thick fibreglass and may be fine with bottles but i thick the foam may be better.


On the topic of foam,Installation being done correctly is key.Using good quality foam and a good drainage system will keep you going for years to come.


Hope this helps.


Evening Shu Vawda,

Noted and Thanks....

However not too concerned as the boat had bottles previously, so Hull behaviour should not change.
Possibly the Sondor Foam might add additional weight to what Closed Cell Foam or Bottles would??

Cheers


Offline Slim Dusty

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Re: Boat Bouyancy/Floatation
« Reply #12 on: Today at 05:33:26 pm »
Collected my Boat on Saturday...

Buoyancy for 5 years and C.O.F. 2018 Sorted!!

Now I am ready to hit the Ocean again!!

 :sreel: :fshn: :dor: :wahoo: :cout: :yft: