Chapter 24 — GLASS AND GLAZING

Section 2411 — [OSHPD 1, 1R, 2, 4 & 5]-THERMAL BARRIERS IN ALUMINUM MULLION SYSTEMS

2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California

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2411.1 General.

2411.1 General. The requirements of this section address the use of thermal barriers composite in aluminum mullion systems. The ther- mal barriers shall consist of either poured and debridged or mechanically locked pre-formed construction. The thermal barrier systems used shall be those tested and complying with AAMA TIR-A8. The thermal barrier manufacturer, formulation number or insulating strut size/material and aluminum extrusions shall be consistent between testing, design and construction. Exception: Single-story Type V skilled nursing or intermediate care facilities utilizing wood-frame…