Do not cheap out on the coating or the wall thickness. Your carport is protecting a $30,000+ vehicle. A $200 difference in steel is nothing compared to a collapsed roof five years from now.
You are on the right track. The 2.5-inch square tube is the backbone of most residential and light commercial carports. But before you hand over your credit card at the local steel yard, there are a few critical things you need to know about sizes, coatings, and local suppliers. 2.5 galvanized square tubing for carports near me
The Ultimate Guide to 2.5” Galvanized Square Tubing for Carports: Sourcing, Strength, and Local Buying Tips Do not cheap out on the coating or the wall thickness
Buy a small can of cold galvanizing spray (ZRC or Rust-Oleum brand). Spray every cut, drill hole, or weld immediately. This restores cathodic protection. Should You Just Buy a Pre-Fab Carport Kit? Here is the honest truth: If you are building a simple 18’x21’ carport, a pre-fab kit from a national brand (like Versatube or Rhino) often costs less than buying raw 2.5” tubing locally, plus you get engineered plans and hardware. You are on the right track