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IBC Chapter 26 — Plastic

Updated Mar 26, 2026

Plastic materials in construction: foam plastic insulation, light-transmitting plastics, plastic veneer, fiber-reinforced polymer.

IBC Ch26: 2603 foam plastic insulation must be separated from interior by thermal barrier (1/2in gypsum) or pass NFPA 286 room-corner fire test. Ignition barrier: attic/crawl spaces (1/2in fiber cement, 23/32 wood). SPF (spray foam): must comply with 2603 + fire testing. 2606 LPSP (light-transmitting plastic panels): skylights, wall panels — Class CC1 or CC2 fire performance. 2607 plastic veneer: max 300 sf panels, 40 ft height (Type I/II buildings). FRP (fiber-reinforced polymer): 2612 — composite columns, beams, panels. Polycarbonate: 2607.5 — impact resistant, used for security glazing and roof panels.

TAGS

IBC plastic foam insulation FRP skylight

DETAILS

code year

2024

code section

Chapter 26

RELATED KNOWLEDGE

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.

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.

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.

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.

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.

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.

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