Adopts With Amendments
Chapter 5
Floors
International Residential Code 2021
[F] 501.1 Application - Floors
Section 501.1 — Application - Floors. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 501.1.1 Floor Construction Scope
Section 501.1.1 — Floor Construction Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] 501.2.1 Floor Construction Scope
Section 501.2.1 — Floor Construction Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] 502.1 Identification
Section 502.1 — Identification. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.1.1 Wood Floor Framing
Section 502.1.1 — Wood Floor Framing. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 502.10 Framing of Openings
Section 502.10 — Framing of Openings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.11 Wood Trusses
Section 502.11 — Wood Trusses. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 502.2 Design and Bearing
Section 502.2 — Design and Bearing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.3 Allowable Joist Spans
Section 502.3 — Allowable Joist Spans. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.4 Floor Joist Bearing
Section 502.4 — Floor Joist Bearing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.5 Lateral Restraint - Joists
Section 502.5 — Lateral Restraint - Joists. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.6 Bearing
Section 502.6 — Bearing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.7 Lateral Restraint
Section 502.7 — Lateral Restraint. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.8 Drilling and Notching
Section 502.8 — Drilling and Notching. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 502.9 Fastening
Section 502.9 — Fastening. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 503.1 Floor Sheathing
Section 503.1 — Floor Sheathing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 503.1.1 Floor Joist Sizing
Section 503.1.1 — Floor Joist Sizing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 503.2 Wood Structural Panel Sheathing
Section 503.2 — Wood Structural Panel Sheathing. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
[F] 504.1 Steel Floor Framing
Section 504.1 — Steel Floor Framing. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 504.1.1 Engineered Wood Products
Section 504.1.1 — Engineered Wood Products. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R501 General Floor Construction
Section R501 — General Floor Construction. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R501.1 Floor Application
Section R501.1 — Floor Application. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R501.1.1 Floor Construction General
Section R501.1.1 — Floor Construction General. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R501.2 Floor Requirements
Section R501.2 — Floor Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R501.3 Fire Protection of Floors
Section R501.3 — Fire Protection of Floors. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] R502 Wood Floor Framing
Section R502 — Wood Floor Framing. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R502.1 Floor Framing General
Section R502.1 — Floor Framing General. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.1.1 Sawn Lumber
Section R502.1.1 — Sawn Lumber. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.1.2 End-Jointed Lumber
Section R502.1.2 — End-Jointed Lumber. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.10 Notching and Boring
Section R502.10 — Notching and Boring. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.11 Floors - Wood Trusses
Section R502.11 — Floors - Wood Trusses. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R502.11.1 Truss Design Drawings
Section R502.11.1 — Truss Design Drawings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.11.2 Truss Design Loading
Section R502.11.2 — Truss Design Loading. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
[F] R502.11.3 Bracing
Section R502.11.3 — Bracing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.12 Floors - Draftstopping
Section R502.12 — Floors - Draftstopping. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.2 Design and Construction
Section R502.2 — Design and Construction. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R502.2.1 Bearing Requirements
Section R502.2.1 — Bearing Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.2.2 Joist Framing at Bearing
Section R502.2.2 — Joist Framing at Bearing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.3 Allowable Joist Spans
Section R502.3 — Allowable Joist Spans. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.3.1 Sleeping Areas and Attics
Section R502.3.1 — Sleeping Areas and Attics. This section covers allowable building height, area, and number of stories based on construction type and occupancy. Refer to the official code text for complete requirements.
[F] R502.3.2 Other Floor Joists
Section R502.3.2 — Other Floor Joists. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.4 Joists Under Bearing Partitions
Section R502.4 — Joists Under Bearing Partitions. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.4.1 Floor Sheathing
Section R502.4.1 — Floor Sheathing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.5 Allowable Girder Spans
Section R502.5 — Allowable Girder Spans. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.5.1 Engineered Floor Systems
Section R502.5.1 — Engineered Floor Systems. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.6 Bearing - Floor Framing
Section R502.6 — Bearing - Floor Framing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.6.1 Bearing Stiffener Requirements
Section R502.6.1 — Bearing Stiffener Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.7 Engineered Wood Products
Section R502.7 — Engineered Wood Products. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R502.7.1 Sawn Lumber Joists
Section R502.7.1 — Sawn Lumber Joists. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.8 Floor Framing - Lateral Restraint
Section R502.8 — Floor Framing - Lateral Restraint. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.8.1 Drilling and Notching of Floor Joists
Section R502.8.1 — Drilling and Notching of Floor Joists. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R502.9 Fastening
Section R502.9 — Fastening. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R503 Floor Sheathing
Section R503 — Floor Sheathing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R503.1 Floors - Floor Covering Materials
Section R503.1 — Floors - Floor Covering Materials. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R503.1.1 Floor Sheathing Requirements
Section R503.1.1 — Floor Sheathing Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R503.2 Wood Structural Panels
Section R503.2 — Wood Structural Panels. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
[F] R503.2.1 Wood Structural Panel Floor Sheathing
Section R503.2.1 — Wood Structural Panel Floor Sheathing. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
[F] R504 Pressure-Preservative Treated Wood Floors on Ground
Section R504 — Pressure-Preservative Treated Wood Floors on Ground. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R504.1 Steel Floor Framing
Section R504.1 — Steel Floor Framing. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R504.1.1 Pressure Treated Wood Floor
Section R504.1.1 — Pressure Treated Wood Floor. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R504.2 Installation Requirements
Section R504.2 — Installation Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R505.1 Cold-Formed Steel Floor Framing - General
Section R505.1 — Cold-Formed Steel Floor Framing - General. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R505.1.1 Applicability Limits - Steel Floors
Section R505.1.1 — Applicability Limits - Steel Floors. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R505.2 Fill Under Concrete Slab
Section R505.2 — Fill Under Concrete Slab. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R506.1 Concrete Floor Finish
Section R506.1 — Concrete Floor Finish. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R506.1.1 Concrete Slab-on-Ground Floors
Section R506.1.1 — Concrete Slab-on-Ground Floors. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R506.2 Site Preparation for Concrete Floors
Section R506.2 — Site Preparation for Concrete Floors. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R506.2.3 Slab Vapor Retarder
Section R506.2.3 — Slab Vapor Retarder. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R507.1 General Decks
Section R507.1 — General Decks. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R507.2 Deck Materials
Section R507.2 — Deck Materials. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.