Wood platform framing is the most common residential framing method in North America. The system consists of dimensional lumber (2x4, 2x6, 2x8, etc.) assembled into walls, floors, and roof structures. Platform framing builds the structure one floor at a time; each floor is completed with sheathing and bracing before the next floor begins. The typical framing sequence is: (1) foundation and sill plate installation, (2) floor joists and subsheathing, (3) wall framing, (4) roof framing, (5) sheathing and bracing, (6) installation of doors and windows. Sill plates are bolted to the foundation and serve as the base for wall framing. Floor joists span between support beams or walls and are typically spaced 16 inches on center (OC). Joist size depends on span and load; longer spans require larger joists or increased spacing. Headers above windows and doors distribute loads around the opening. Wall framing typically consists of 2x4 or 2x6 studs spaced 16 inches on center. Studs provide vertical support and attachment points for sheathing and interior finishes. Plates at the top and bottom of walls tie the studs together. Bracing prevents racking and improves lateral resistance. Wood bracing, plywood sheathing, or other approved methods provide bracing. Roof framing uses rafters or trusses. Rafters are individual members spanning from the wall plate to the ridge. Trusses are prefabricated frames combining rafters, collar ties, and web members that distribute the load structure. Proper nailing and bolting connections are critical for safety and durability. The International Building Code specifies connection details for various framing members.