When I bought a steel patio kit, I thought I would put one of its square hollow section (SHS) steel posts on the existing balcony so I ordered it in two and half meters. However, I have changed my mind and would like to make the patio larger and put the post in the ground. Therefore, I need a post that is five meters long.
Is it okay to extend the existing post instead of getting a new longer one? What is the best way of doing it? I thought welding would be the way to go but I am not sure as I couldn't find any information or instructions on the internet around how to do it best. The existing post is 100x100x3mm and powder-coated. The extra length that I can get for extension will be galvanized and in the same size or possibly thicker, i.e., 4mm.