Ventilating expansion screeds used for ventilation of air spaces under horizontal or protected vertical surfaces must be made of No. 26 galvanized steel for which areas?

Ventilating expansion screeds used for ventilation of air spaces under horizontal or protected vertical surfaces must be made of No. 26 galvanized steel for which areas?

• A. Eaves
• B. Corridors
• C. Canopies
• D. All of the above

Answer: (D)

Ventilating expansion screeds vent air spaces under horizontal or protected surfaces, so the metal chosen must resist moisture and weather exposure. No. 26 galvanized steel provides the necessary corrosion resistance and enough strength for the vented design. Eaves, corridors, and canopies all fall into areas where ventilation is needed under surfaces that are exposed or semi-exposed, so the same material specification applies to all of them. Therefore, the requirement covers all of the listed areas.

Ventilating expansion screeds vent air spaces under horizontal or protected surfaces, so the metal chosen must resist moisture and weather exposure. No. 26 galvanized steel provides the necessary corrosion resistance and enough strength for the vented design. Eaves, corridors, and canopies all fall into areas where ventilation is needed under surfaces that are exposed or semi-exposed, so the same material specification applies to all of them. Therefore, the requirement covers all of the listed areas.