Framing is the structural skeleton of a building that supports floors, walls, and roof, typically constructed from wood (most residential construction) or steel (commercial and larger buildings). Wood framing uses dimensional lumber (2x4s, 2x6s, etc.) assembled into wall studs, floor joists, and roof rafters or trusses. Steel framing uses metal studs and beams. Framing defines room shapes, supports building loads, and provides surfaces for attaching interior finishes and exterior cladding. Building codes specify framing requirements for structural adequacy, fire safety, and energy efficiency (insulation cavities). Framing inspections verify proper construction before walls are enclosed. Quality framing is essential for building durability, energy performance, and structural integrity. Advanced framing techniques optimize material use while maintaining strength. For municipal buildings, framing decisions consider long-term durability, maintenance requirements, and life-cycle costs.