Structural · S-ED3KK

Typical Small Opening in Floor Slab

Materials

Elements

Floors / Slabs Decks Reinforcing Roof / Floor Openings

About this detail

This detail governs small penetrations cutting no more than two adjacent webs in a twelve-inch module metal deck with concrete topping. Openings must be blocked out and the deck left intact during concrete placement, allowing deck removal within the opening area only after the concrete has fully cured. Steel angles measuring 3-3/4 inches by 1-3/4 inches by 1/4 inch are placed on top of the deck and must extend three webs past the deck opening on typical installations. Specific dimensional spacing thresholds dictate whether nearby openings are treated independently or combined into a single group requiring heavier reinforcement. Individual holes less than six inches in diameter cutting no more than one web require no additional reinforcement.

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