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In French door construction, “L-section” and “Z-section” generally refer to specific profile shapes of the structural Galvanized Iron (GI) or steel components used for framing and reinforcement. These materials are chosen for their strength, durability, and resistance to rust and weather conditions. L-Section Material Description Material: Typically Galvanized Iron (GI) or steel, often with a powder-coated finish for added protection. Shape: A right-angle profile, resembling the letter “L”. Function: Primarily used for framing or reinforcing corners and edges of the door frame or panels, providing a solid, clean edge. Properties: Offers strength, stability, and helps maintain the structural integrity of the frame, especially at joints. Z-Section Material Description Material: Also commonly Galvanized Iron (GI) or steel, available in various gauges (thicknesses). Shape: A profile that resembles the letter “Z”. Function: Used in door frames or panels where additional rigidity or stability is required, or to fit specific design needs. In some industrial applications, “Z” blade type louvers are also used in steel doors for air flow control. Properties: Provides significant structural support and can be used for creating door frames that require enhanced strength and rigidity.