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27th April 2014, 02:24 PM #46GOLD MEMBER
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They are responsible for certifying that it complies with the VSB regulations on the day as regards brakes, tyres fitted, lighting, attachment of safety chains, grade thereof and hitch rating being adequate for the registered mass.
As you say, they cannot be held responsible for workmanship, maintenance and design outside those parameters covered by the relevant standards.
In the scheme of things, Gazza's trailer would have been a fairly simple build if he had been able to get the material rolled as he originally believed possible. The design utilised no welding of Ally in structural areas, (even the hitch could have been attached without welding of the Ally).
If anything, the use of trusses, while very effective in the right application, introduce a greater unknown into the build over a section of known and certified mechanical properties.
In many ways we are both on the same side.
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27th April 2014, 04:55 PM #47Senior Member
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- NSW
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ok thanks karl looks like i will give the alloy welding a miss, how about a bolt together steel trailer in the same way the aluminium trailer was going to be built? may look a little poxy tho being bolted i will have to look around for other steel trailer ideas or just buy a trailer already built
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27th April 2014, 06:33 PM #48
Bolted together steel trailer.....for God's sake why?
The art and science of weded steel boat trailers is pretty well established....the welding and engineering are both trivial matters.
With the time and energy spent considering this aluminium red herring.....you could have built a small welded steel boat trailer.
cheersAny thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.
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27th April 2014, 06:49 PM #49Senior Member
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- Aug 2009
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- NSW
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because my welding sucks and i dont have a nice flat newly laid piece of cement most people will have as a starting point to lay out the steel, these are my attempt at DC TIG welding steel get my drift? lol
Picture 047.jpgPicture 046.jpgPicture 045.jpgPicture 044.jpgPicture 041.jpg
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26th March 2015, 10:51 PM #50
I can see the main problem your having with that TIG welding... TIG and Galv dont mix well
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26th March 2015, 11:05 PM #51Member
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- Dec 2012
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27th March 2015, 09:28 AM #52Senior Member
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- NSW
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i would have loved to build my own aluminium trailer but seems i cant mate and the aluminium trailer would have been bolted together so no need for welding like a steel trailer
i did download the plans from Glen L's web page but lost the plans on my old computer
ive since found a great deal on a pre built trailer altho its only gal steel but its cheap at under 2k i think thats a better option
still open to ideas on the aluminium trailer idea's as that is my ideal trailer i would much prefer if anyone can think of an idea or way around bending the aluminium I beams but to buy one pre built i would be looking at around 5k which is well out of my budget
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27th March 2015, 01:27 PM #53Member
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- Dec 2012
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- WA
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People have been trying to build a better mousetrap (aka Boat trailer) and galv steel still wins every time.
Think of boat traiers as a consumable item.
A chain is a s strong s its weakest link, and your fasteners and their mounting points are going to it
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27th March 2015, 02:16 PM #54Senior Member
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- Aug 2009
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- NSW
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yeah Aufitt biggest problem of building the Glen L trailer was the hassle with galvanising i was quoted rediculous prices plus hiring a car trailer two times to tow the trailer to the galvanizers to be dipped (sydney to newcastle twice)
how long do u guys think the Tectyl i think its spelt product can hold back rust on welds?
ive found a new company just now who passed me onto another company than another one onto another company and they charge only $3.20 a kilo for galvanizing and they are local but a hassle getting the trailer to and from there
i called a few shops about the C section steel and im getting mixed results some are trying to sell me steel C beams other are trying to sell purlins with 1.5mm wall
the Glen L plans say to use C section steel 3" tall by 4.1lb whatever that is anyone know? maybe its 4.1lb per foot length of steel C section?
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27th March 2015, 02:29 PM #55Senior Member
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- Sep 2008
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Galvanising is too difficult for me. My projects are typically made from duragal/supagal (so I can leave a junkyard of metal lying around the backyard and it stays good for a while). Older projects I painted with a brush, minimal prep (bit of sugar soaping and slapping on too much primer and paint). They are holding up really well, all out in the weather.
I also did an experiment documented on here where I tried lanolin spray. I made up a project out of duragal pipe, sprayed down my raw weld zones with lanolin and many months later or maybe a year and there isn't a spot of rust. It's just sitting in the garden. I'm very impressed.
Now I have a spray painting set up and I anticipate that will be even more awesome than my brush overpainting technique. The couple of projects I've sprayed down look great and seal well. I reckon they'll do just as well as the brush.
Another example is a boat trailer I built a couple of years ago frequently exposed to salt water and the elements. Built out of duragal and all welds brush painted with cold gal and then overcoated with duragal paint. I also slapped a bit around outside the weld zones where I could be bothered. I know that one will succumb eventually but there is no visible rust yet.
Long story short, galvanising is great but not the only way.
Brush painting sucks and I hate it more than almost anything. Spray painting is great though.
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27th March 2015, 10:14 PM #56Senior Member
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i built this a few years ago a trailer frame but getting it to the glavanizer was going to be a real pain in the ass, now im driving a small 4 cylinder hyundai which i dont think could tow a car trailer plus the boat trailer frame so using C section steel thats already galvanized would be a very good option as it would give access to the welds on all sides to coat with something
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28th March 2015, 12:28 AM #57Member
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- Dec 2012
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- WA
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In my state (where we pay twice anywhere else in the world), can Galv a frame for $600, that's 20% he cost of a boat trailer for a 5m 1350kg boat.
Couldn't build an ally OR steel trailer for that unless its such a full on custom that even Bulldog o Dumbuyer dont have a model to suit?
An outboard is 15k, a decent hull Is 20k, what is the boat its going on?
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30th March 2015, 11:02 PM #58Senior Member
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- Aug 2009
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- NSW
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while out fishing on the weekend in port hacking a south sydney river system my mate pointed out a chained up trailer at the boat ramp was for sale so i went over and had a look, price on the trailer was $650 i thought that cant be right so i called up the owner later on that night and picked it up today
2008 model 4.8 meter (actual boat length) drive on trailer and the price was $650 plus it has 5 months registration, LED lights, spare wheel, i couldnt believe it no rust at all
its probably not ideally built to suit the boat im building but ill take some better pictures during the day and shoot them off to the boat designer and ask where should i place rollers or more skids
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30th March 2015, 11:45 PM #59
There are a whole pile of presupositions, that realy should be chalenged.
1. not being able to do something or do something well is not a good reason to do it whole lot more complicated way.....it just does not work.......so if you cant weld......don't try to build a trailer......it would be simpler and cheaper to learn to weld or get someone else to do it.
2. galvanising is not the bee all and end all of rust prevention.......the reason commercial trailers are hot dipped galvanised is that it is relativly simple and relativly cheap to do so.
3. galvanising is a tempoary measure...exposed to salt water and the eliments the galvanising will eventually disapear.
4. you can do a pretty good job of preventing rust using paint...in fact chose your paint well and pay what is needed and it will outperform galvanising.........both my brother and my brotherinlaw have boat trailers that are hand painted and show no signs of rust after many years.
cheersAny thing with sharp teeth eats meat.
Most powertools have sharp teeth.
People are made of meat.
Abrasives can be just as dangerous as a blade.....and 10 times more painfull.