Plenty of folks would bolt together a store-bought kit or pay a shop to weld up a chassis, but Father Son DIY Garage went the other route and cut every stick from scratch for a custom steel utility trailer frame and tongue. That hands-on approach shows in the fit-up, and it makes for a great watch if you are planning your own rolling base.
The layout is a 10-foot by 6-foot-7-inch rectangle. Side rails are a pair of 10-foot pieces of 2-inch square tubing with 3/16-inch walls, tied together by four internal cross members at 4-foot-8-inch each. The central tongue is heavier stock, 1/4-inch square tubing, running roughly 3 feet ahead of the front rail, and side bracing tubes welded to the chassis help reinforce it. Triangular corner gussets stiffen the frame, and leaf spring hanger brackets are set 24-7/8 inches apart. The bracing tubes get miter cuts at 67.5 degrees.
The sequence is methodical: perimeter and cross members are cut outdoors with a cold-cut chop saw, then the work moves into the garage onto leveled support bars sitting on four jack stands, including some homemade threaded-rod leveling stands. Squaring comes from corner squares plus diagonal tape measurements, joints get a 45-degree bevel ground in, and welding runs from tacks to full multi-pass beads. One thing still open: the maker has not said which filler rods went into those welds.
Project by Father Son DIY Garage. Watch it on their YouTube channel: