Hello, Im currently doing my first trailer rebuild and want information of what type of metal to use to restore the main frame and where in the United Kingdom to obtain this metal. I have a aluminium trailer an old caravan base approx 17ft long. 13ft bass. It’s currently only three beams Supporting it and I need to weld either four to five new ones. What suggestions would you suggest for type of metals to use and where to buy these. They will need to be able to be welded to the chassis to support 1000KG on the main frame. Please help as this is my first big project as previously only some smaller trailers. This is to be turned into a utilities trailer which will have a box frame around.