Every outdoor bench must survive rain, snow, UV radiation, and the inevitable chemistry of a thousand sitting humans. That is why our factory treats the junction between the legs and the seat not as a simple step, but as a critical structural marriage. The process begins with CNC-milled mortises or pre-drilled pocket holes on each seat slat, depending on the model. Our operators then slide the legs into precision-built steel jigs that lock the angle, width, and parallel alignment to within 1.5 millimeters of the drawing spec. Once locked, we drive A2-70 stainless steel lag screws through the seat's underside into the leg's embedded brass inserts. This design is deliberately gap-free: the brass insert bites into the wood grain, while the screw's thread creates a radial compression that fights loosening from thermal cycling. For benches with tubular steel legs, we use a hidden flange bracket system that is welded and then bolted through oversized drilled holes, allowing for minor field adjustment. Every single joint receives a bead of marine-grade polyurethane adhesive before final torquing. The adhesive cures into a rubber-like film that kills chattering fatigue. After each bench leaves the jig, a dedicated inspector torque-tests every fifth bolt with a calibrated wrench and performs a lean-test with two 120-kilogram loads placed on the seat's outer quarter points. We log those numbers with the bench's serial number. The result is a connection that feels rock-solid on day one and stays that way after a decade of park weather. It is not just assembly; it is a controlled act of structural prophecy.