Home›Knowledge›IBC Chapter 19 — Concrete
📋 Codecodesconcrete

IBC Chapter 19 — Concrete

Updated Mar 25, 2026
Structural concrete design and construction requirements, referencing ACI 318 with IBC modifications for durability, reinforcement, and special systems.

Section 1901: General — structural concrete designed and constructed per ACI 318 as modified by this chapter. Section 1902: Definitions — plain concrete, reinforced concrete, prestressed concrete. Section 1903: Specifications for tests and materials — ASTM standards for cement, aggregates, water, admixtures, reinforcement. Section 1904: Durability — exposure categories (freezing/thawing, sulfate, corrosion). Minimum cover requirements. Maximum w/c ratios by exposure. Air entrainment for freeze-thaw. Section 1905: Concrete quality, mixing, and placing — per ACI 318. Field-cured cylinders for stripping verification. Section 1908: Modifications to ACI 318 — IBC-specific seismic provisions, anchorage to concrete. Section 1910: Minimum slab provisions — slab-on-ground minimum 3.5 in thick. Section 1907: Minimum reinforcement — per ACI 318 plus IBC additional requirements.

TAGS
IBCconcreteACI-318reinforcementdurabilitystructural
DETAILS
code year
2024
references
["ACI 318-19"]
code system
IBC
code section
Chapter 19
RELATED KNOWLEDGE
📋 Code
IBC 903.2.1 — Group A Occupancies (Sprinkler Requirements)
Automatic sprinkler system required throughout buildings with Group A occupancy where fire area exceeds 5,000 square feet, or overall building area exceeds 12,000 square feet, or occupant load of the fire area exceeds 300.
📋 Code
IBC 903.2.7 — Group M Occupancies (Retail Sprinkler Requirements)
Automatic sprinkler system required in Group M (mercantile) occupancies where fire area exceeds 12,000 square feet or building is more than three stories above grade.
📋 Code
IBC 903.2.11.3 — Buildings 55 Feet or More in Height
Automatic sprinkler system required throughout buildings with a floor level having an occupant load of 30 or more that is located 55 feet or more above the lowest level of fire department vehicle access.
📋 Code
IBC 1015.1 — Exit and Exit Access Doorways Required
Two exits or exit access doorways required from any space where occupant load exceeds the table values. Spaces with occupant load exceeding 500 require a minimum of 3 exits. Spaces exceeding 1,000 require 4 exits.
📋 Code
IBC 1017.2 — Exit Access Travel Distance
Maximum travel distance from any point in a building to an exit shall not exceed 200 feet unsprinklered or 250 feet sprinklered for most occupancies. Specific occupancies have modified limits.
📋 Code
IBC Table 601 — Fire-Resistance Rating Requirements
Specifies minimum fire-resistance ratings for structural elements based on construction type (Type I through V). Type IA requires 3-hour rated structural frame, 2-hour floors, and 1.5-hour roof.
← Back to Knowledge Garden