In my opinion and experience, they will be unstable and want to roll.
They will almost certainly be more stable upside down than rightside
up. Most floating docks have one or more finger docks, which are the
narrow parts. If they're connected to each other perpendicularily,
this'll keep them from rolling. Putting a third barrel in the center
is only useful if you don't have enough floatation. It won't make it
any more stable. Probably the opposite. You don't have to buy
"floating dock hardware" to connect them together. Just get your local
metal shop to weld up some heavy hinges (2 per junction) with a
removable axis pin. Get everything hot dip galvanized.
-Maxime Camirand
About using used plastic barrels, check where they coming from and what were
they containing.
I had to give up the idea of using plastic barrels because they had been
used for the transport of toxic chemical.
With today's environnemental bylaws it would be safer to check with the
proper authorities.
The following suggestions are subject to you area and waterway regulations.
In some location the design will have to be much stronger to meet the marine
environnement of were you are building the floats.
As for the construction of the 3' X 16' floating docks 2" X 8" rough sawn
juniper is on the light side.
What I used was 3" thick by 10" wide. This size is not easy to get by, but
if you have access to a local (or portable) lumber mill it is no problem.
As for the decking 1/4" X 3" is light I used 2" thick by 6" wide.
You said you doing this on the cheap. I suggest that you use steel corner
plate bolted through the cross member and the side stringer. Nailing could
do for a short term but I do not recommend it.
news:1176994133.3...@o5g2000hsb.googlegroups.com...
Small world I see you are from NB I am on PEI. It is in a sheltered
cove about 4' deep. The barrels are clean. The decking is is 1-1/4" X
3" not 1/4" X 3. As for the corners I would put 4X4 post vertically
on the inside and through bolt the 2x8's with Galv. carriage bolts.
What about the amount of floatation. The barrels will support around
600lbs each if totally submerged, any idea how heavy the dock would be?
You are saying that you were to use Juniper lumber.
At time, Juniper is a localism and is used to describe other known lumber
trees species as Hemlock, Black spruce or Tamarack (Eastern Larch).
Please check http://www.macphailwoods.org/tree/larch.html and tell me what
species you are referring as Juniper.
I am refering to Tamerac or Larch, It is becoming very popular around
here for use in residential outdoor decks as it is resistant to rot.
The green weight of Tamerack is 3.9 lbs for 1 BF that is 1" thick X 12" X
12"
This wood varies in weight on a regional level. When you do the weight
calculation you can only be sure at a plus or minus 10%. What we did is we
build one dock with its floats as a prototype. Then we launched this dock
and checked its center of gravity and the immersion depth. Luckily
everything was acceptable. Then we started to build more docks.
Tamarack was used in the old shipbuilding of New Brunswick for a very long
time.
They will probably float too high, making the centre of gravity of the
docks too high, and therefore the docks will be tippy. But you can
partially fill the barrels with water to lower the centre of gravity.
You have the advantage of putting letting just as much water into the
barrels as you need to lower the docks.
With water in the barrels the docks won't blow about in the wind.
Take a look at http://www.tiedown.com/amarinedls.html for some
pointers on dock design?
I have no experience of the designs or products, but they may assist.
--
Richard
Nb "Pound Eater" Parkend G+S
"Governments are like Nappies, they should be changed often."
(For the same reason)
Mark,
I'm doing the same thing this summer. I've been looking at www.techstarplastics.com
for floats but they are $325 each from a local distributor. I've found
an interesting step by step dock building site at:
http://www.canadianfishing.com/dock/index.htm, fyi.
My dock will be 2 sections of 10ft wide x 16ft, so I'm looking at ways
to cut costs as well. I want the dock stable for 4-6 adults at the end
of the dock, sitting & enjoying a beer!
Some guys on the lake have 6ft wide docks with barrels and they rock a
fair amount. I would think a 3ft wide dock would flip over!
If you find any more info, please post/email.
Thanks,
---davr
>On Apr 19, 10:48 am, mark <m...@islandtelecom.com> wrote:
>
>
>>I am going to build some floating docks but before I re-invent the
>>wheel I would like to get some opinions. They will be 16' long by 3'
>>wide and at either end I would put a plastic barrel under it, inside
>>the frame. The frame would be 2X8 rough sawn Juniper and the decking
>>would be 1 1/4" X 3 . First of all would this be stable or want to
>>roll, should I put a 3rd barrel in the center? If the barrels were in
>>a framework but free moving could they act as rollers to help when
>>pulling the docks out of the water. The beach is very gradual. I am
>>doing this on the cheap so I am not buying any floating dock hardware,
>>brackets, plastic floats etc...Any other ideas would be appreciated.
>>Thanks
>>
>>
>I had a wooden dock about 7 ft by 9 ft - held up with 6 barrels - still too tippy for my likes - I pulled the barrels and added legs....
>
you might use more barrels and 1/2 fill them with water for ballast!
paul
>
>
>
I've found plenty of discussion on the topic at various locations
around the internet, but I can't seem to find any information about
where to get these 55gal plastic barrels that everyone keeps talking
about. All I can find are floats that cost approx $100 per 350lb of
lift. That's over my budget. I'm looking for cheaper options, like
barrels, but I have no idea where to find them. Little help here?
What are they worth to ship? I know of a few sources around here.
Terry K
To hook the sections of dock together you can use two sets of hot-
dipped galvanized eye bolts. Put two eye bolts on the ends of the two
docks you want to connect, with the set on one of the docks slightly
closer together than the other. Line up the eyes and run an
appropriate gauge and length of galvanized rod/threaded rod/pipe and
secure the ends with a pin/nut/cap- whatever works. On a three foot
wide dock, you would probably put the eye bolts about 2.5 feet apart.
This method of connecting docks is cheap, extremely strong and secure,
allows the dock sections hinge naturally with the movements of the
water, is easily taken apart, and provides for great lateral
stability. Oh, and did I mention cheap?
And no, I am not CEO of an eye bolt company :)
Michael Pierce
I just picked up 2 new but used bright blue plastic barrels from a
local farmer. They have 2 screw caps in the top. The local farmer
sells all kinds of barrels. They cost me $12ea (CAN). Both had been
used for food. I looked at the labels of the barrels and they were all
types; pickles, syrup, molasses, even eye contact solution. I would
recommend contacting a local large manufacturer of food products and
ask them if they have any to sell or who they sell their used barrels
to. Good luck.
Each pipe is held together with steel banding and includes gaps in the
boards for ladders, stowage, pet fish, spacer 2 x 4s, etc.
The 2 pipes are harnessed in figure 8 chains. The chains will soon be
held snug to the pipes with fence wire braces and threaded rod
tensioners, or possibly a few short staples. Fence wire braces corner
to corner will be added to stabilize pipes fore and aft.
The decks are 5' x 5'. 2 layers of the same 5' cedar, criss crossed,
nailed and clenched, with eye bolts at each corner.
The dock is held (pushed) offshore by an old lightning chewed aluminum
mast chained to a rock. The gangway is "T" sectioned, nailed up from 1
x 5s and a 1 x 4, with cross pieces at the ends.
The dock has been left out in the snow and ice, only floated up in
high water in the fall and floated down in the spring freshet. It is
being neglected to destruction. So far, 3 years and no signs of
failure. I expect the standard banding to rust out sometime in the
next 5 years. Rebanding the raft pipes will take about an hour,
provided I get it done before it all suddenly and completely
disintegrates. I may use stainless banding this time.
It was cheap, easy and fun to assemble. Can be muscled around myself,
if moved in pieces. It looks great!
I thought I sent this posting two weeks ago?
Terry K
sorry to ride a post.
only thing i would warn is make sure the barrels are not locked into
the dock.
if one gets a crack or hole in it its going to cause problems unless
it can fall out.
if it cant it will pull its section down as it fills with water.
naa im too dumb for that and i like to have dry feet.
fuel filters who needs fuel filters; a roll of papertowels and your all
set.
Pictures and plans on request.
Terry K