Newbie project questions

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I just found this web site - WOW!  I've looked at a lot of your projects you have posted.  I was hoping you could provide me with some advice for my upcoming projects.I always wanted to learn to weld, but never took the time in school to take a class.  I finally went out and bought an inexpensive wire feed welder.  I know, not your first choice, but it has worked well for the first couple attempts I've made.I would like to build some ATV implements for making food plots.  I would like to weld up a smaller trailer as well as a small plow / cultivator to pull behind my ATV.Trailer first - I would like to make it light weight / small.  I can't imagine ever putting more than 300 lbs or so in it.  I plan on welding a tongue to a frame with sides / corners and then putting plywood on it.  What size steel should I use for the tongue (I believe the hitch is 2.5" wide) 2.5" square 3/16th? 2.5" square 1/8th?  rectangular?  What about the side supports?  1.5" angle 1/8th?  Plow / cultivator - I plan on buying either some "shovel" cultivator blades or narrow plow "spikes" (i.e. 3-4" wide) and attaching them to a frame w/ wheels (to adjust height) attached to a tongue.  Same types of questions.  Tongue size?  frame size (I think this one will be key as it will get a lot of torque from the plowing)?I sure appreciate any suggestions you have from your experience.  I am just too new at this to have any sort of "feel" for the strength / properties of the steel yet.
Reply:Here's some basic plans: [url=] TRAILER[/url]
It's all in metric but it should give you a rough idea about the design.Common sense in an uncommon degree is what the world calls wisdom.
Reply:here in north la, it easy to find old small boat trailers. they can be modified into atv trailer very easily                                                            ken
Reply:just make sure that if you get a boat trailer  it isnt galvinzed or youll regret that purchase, that stuff is a killer.#1 its really bad health wise #2 its a major p.i.t.a. to weld and it will rust whre you welded it
Reply:arcdawgi think you need to research your replies more or at least state that it an opinion
Reply:well i would hope that my thread was viewed as a opinion, i have seen alot of boat trailers that are galvinzed up here. and i have done a fair share of welding galvinzed and it SUCKS, the fumes the quality of the weld adn the fact that it will rust after you take the coating off. nuff research for ya ?