What Structural Support Is Needed for Aluminum Cladding Facades?

Aluminum cladding systems rely on an engineered support structure to transfer loads safely to the building frame. The primary support is an aluminum or stainless-steel sub-frame comprising vertical mullions and horizontal rails. Mullions, often extruded with dovetail channels, attach to the building structure via stainless-steel anchors embedded in concrete or bolted to steel beams. Horizontal rails slide into mullion channels, allowing panel attachment with concealed clips or brackets. Thermal break inserts—polyamide strips within mullions—interrupt conduction paths, enhancing insulation. Adjustable brackets accommodate construction tolerances and differential movement due to wind sway and thermal expansion. For high-load applications, reinforced steel back-borders behind panels distribute forces evenly. Expansion joints at fixed intervals prevent stress buildup. Sealant-lined gaskets and backer rods between panels ensure airtightness. Engineering calculations confirm the system’s capacity to withstand wind, seismic, and dead loads. By specifying quality sub-frames, anchors, and detailing, aluminum cladding facades achieve both structural integrity and aesthetic precision.