Unitized Curtain Wall Left-right Mullion Connection Details is the core structural connection technology in unitized curtain wall engineering, specifically developed to meet the requirements of modern high-rise buildings for precise positioning between curtain wall units, efficient load transfer, and long-term sealing integrity. The system employs a high-strength 6063-T6 aluminum alloy extruded mullion as the main body, combined with stainless steel multi-directional adjustment mechanisms and pre-stressed locking components. Through a three-dimensional orthogonal slotted bolt connection design, it achieves dynamic tolerance compensation between adjacent units in the horizontal, vertical, and front-back directions (with an adjustment range of up to ±20mm), effectively absorbing deformations caused by building structural displacement, wind pressure deformation, and thermal stress, thereby ensuring the safety and adaptability of the overall curtain wall structure.

The node integrates a multi-layer sealing system: the first layer is an exposed weather-resistant silicone structural sealant that resists UV aging and rainwater erosion; the second layer is a closed-cell EPDM compression-type air seal strip, which forms an elastic sealing interface during unit interlocking; the third layer is an "equal-pressure drainage cavity" composed of an internal drainage membrane and air pressure balance holes, effectively preventing rainwater infiltration and condensation accumulation. All metal connectors undergo anti-corrosion treatment such as anodizing or fluorocarbon spraying and are validated through finite element simulation analysis and physical cyclic loading tests to ensure long-term performance stability under wind pressure resistance (meeting the national standard Level 12), seismic fortification (satisfying an 8-degree seismic design requirement), and fatigue loading.

This standardized node system supports factory pre-assembly and on-site rapid plug-in installation, significantly improving construction efficiency and reducing reliance on on-site welding and sealing. It is suitable for landmark architectural projects such as super high-rise office buildings, large transportation hubs, and irregular curved curtain walls that have stringent requirements for structural precision, project timelines, and long-term maintenance, providing a reliable, precise, and sustainable technical solution for unitized curtain walls.