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What lead times, logistics planning, and crane requirements impact unitized curtain wall installation?
Lead times for unitized curtain walls include design finalization, shop drawing approval, fabrication, transportation, and site erection; typical fabrication lead times range from several weeks to multiple months depending on project scale and customization. Early engagement of the façade manufacturer is essential so panel fabrication can proceed in parallel with structural works. Logistics planning must consider site access, delivery routes, weight and dimension restrictions, and storage space. Transportation constraints—oversized loads, height and width limits, and local permit requirements—can dictate maximum panel sizes, often necessitating panel segmentation or on-site assembly. Crane selection is critical: capacity to lift the largest panel at the required outreach, availability of tower crane time, and hoisting height influence erection sequence and productivity. Lift plans must include rigging points, spreader bars, and wind limits for safe lifts. Just-in-time delivery sequencing reduces on-site storage demands but requires precise coordination; delays in fabrication or customs clearance can cause crane waiting or schedule disruption. Temporary protection measures for panels in storage (weather covers, upright bracing) are necessary. Finally, contingency planning for customs, port handling, and strike or weather delays should be part of the logistics risk register to avoid project schedule slippage.