IRC 2021 · Model
Chapter 5: Floors
41 sections in this chapter of the IRC 2021 model text — not Model's amended edition.
502.1 General Wood and wood-based products used for load-supporting purposes shall conform to the applicable provisions of this section.
Plain-English guides for this chapter
- Deck Ledger — IRC R507.9.1.3, IRC R507.9.1.1, R507.9.1.2
- Floor Joist Spans — IRC R502.3, Table R502.3.1(2), IRC Table R502.3.1(1)
- Deck Footings — IRC R403.1.4, R507.3.2, IRC R403.1, R507.3
- Notching & Boring — IRC R502.8.1, IRC R502.8.1
- Deck Stairs — IRC R311.7.1, IRC R311.7.5.1, R311.7.5.2
- Roof Snow Load — IRC Table R301.2, IRC R301.2.3
- Vapor Retarders — IRC R702.7, IRC R702.7
- Garage Floor Slope & Drainage — IRC R309.1, IRC R309.1
- 502.1General
- 502.1.1Sawn lumber
- R501.1Application
- R501.2Requirements
- R502.1General
- R502.1.1Sawn lumber
- R502.1.2Prefabricated wood I-joists
- R502.10Framing of openings
- R502.11.1Design
- R502.11.2Bracing
- R502.11.3Alterations to trusses
- R502.12Draftstopping required
- R502.2Design and construction
- R502.2.1Framing at braced wall lines
- R502.2.2Blocking and subflooring
- R502.3Allowable joist spans
- R502.3.1Sleeping areas and attic joists
- R502.3.2Other floor joists
- R502.4Joists under bearing partitions
- R502.5Allowable girder and header spans
- R502.6Bearing
- R502.6.1Floor systems
- R502.7Lateral restraint at supports
- R502.7.1Bridging
- R502.8Cutting, drilling and notching
- R502.8.1Sawn lumber
- R502.9Fastening
- R503.1Lumber sheathing
- R503.1.1End joints
- R503.2.1Identification and grade
- R504.1General
- R504.1.1Unbalanced soil loads
- R504.2Site preparation
- R505.1Cold-formed steel floor framing
- R505.1.1Applicability limits
- R505.2Structural framing
- R506.1General
- R506.2Site preparation
- R506.2.3Vapor retarder
- R507.1Decks
- R507.2Materials
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