An aluminum mullion section aligns with glazing sized per elevations and specifications, positioned four inches from the face of construction. A sealant over a backer rod seals the joint between the storefront assembly and the concrete tilt-up panel, maintaining a three-eighths-inch clearance. The concrete tilt-up panel is detailed on structural drawings. General notes reference 2019 CBC Section 2406 for minimum frame lap over glass edge, minimum glass clearance, and required glass supports.
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