Which standard must penetrations in smoke barriers adhere to for protection with approved firestop systems?

The standard that governs penetrations in smoke barriers, particularly regarding the use of approved firestop systems, is UL 1479. This standard is specifically designed to evaluate the firestop systems' ability to prevent the passage of fire and smoke through openings in walls or floors, including those related to various types of penetrations.

When a building has penetrations in its smoke barriers, it is vital that these openings do not compromise the integrity of the barrier. Firestop systems, which are evaluated according to UL 1479, provide tested performance criteria for ensuring that any openings created by pipes, cables, or ducts do not allow smoke and flames to travel through them.

The other standards listed, while relevant to fire and safety materials and methods, do not specifically address the requirements for firestop systems in smoke barriers. Therefore, UL 1479 is the most appropriate standard for ensuring that smoke barriers maintain their protective qualities when penetrated.