The Facade Atlas
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University Centre at Ahmedabad University

Location
Ahmedabad,India
Design firm
SPA Design
Typology
Educational
Years
2016–2020
Status
Complete

Facade facts

Facade summary
An expressive, climate-responsive skin featuring deep horizontal concrete overhangs,floor-to-ceiling glass curtain walls,and external metal screens,suspended above an open public undercroft.
Documented intention
The design aimed to establish a high-performance envelope that minimizes solar gain in Ahmedabad's harsh semi-arid climate while maximizing physical and visual transparency. By elevating the building and leaving the ground floor empty, the facade acts as a giant parasol that shades the public domain.
Street relationship
The building's lack of a ground-floor facade establishes an immediate, seamless connection with the campus pedestrian paths, drawing people naturally through and under the structure.
Climate relationship
The entire envelope behaves as a passive climatic system. The deep horizontal slab overhangs shade the recessed double glazing from the high summer sun. The open-air ground level creates a shaded microclimate that utilizes the stack effect to pull cool breezes through the campus courtyard.
Window pattern
A continuous ribbon window configuration stretching horizontally across the building facade.
Glazing
Double Glazing (DGU) with high solar factor control and low-emissivity (Low-E) coatings.
Depth
Extremely high depth due to the structural setback of the glass line from the outer face of the concrete portal frames.
Rhythm
A strong, repetitive structural rhythm set by the massive,evenly-spaced concrete portal frames.
Exposed Concrete
Exposed Concrete — Primary portal columns,floor plates,roof structure,and overhangs — Rough,board-marked,cast-in-situ finish
Glass (Double Glazed Units)
Glass (Double Glazed Units) — Continuous curtain walls on the upper floors — Low-E high-performance coating
Structural Steel
Structural Steel — Roof-level trusses and suspended structural hanger rods — Painted/Coated anti-corrosive finish
Metal Louvers and Mesh
Metal Louvers and Mesh — East and West facade screens — Powder-coated
Stick Curtain Wall System
An aluminium-framed, floor-to-ceiling glass curtain wall system set back from the floor edges to benefit from structural shading.
Structural Suspended Envelope
An unconventional structural facade system where perimeter loads are suspended from roof-level steel trusses, leaving the glazing line entirely free of structural column interruptions.
External Shading Screen System
Vertical powder-coated metal louvers mounted externally to frame structures to filter direct sunlight.

Tags

Curtain Wall System

Description

The envelope of the University Centre is a highly complex architectural system derived from its structural logic. The entire building is supported by massive cast-in-situ concrete portal frames. Steel trusses span between these portals at the roof level, from which intermediate floor slabs are hung. Consequently, the facade has no structural columns at its perimeter. On the upper floors, the facade is composed of continuous floor-to-ceiling glass curtain walls. These glazed volumes are set back from the structural edge, creating deep horizontal balconies that cast shadows over the glass, preventing direct solar exposure. The east and west elevations, which receive the most intensive sunlight, are shielded behind vertical metal louvers and screens. The ground floor lacks any physical facade, remaining completely open to the campus to encourage air circulation and informal gatherings.

Visual analysis

To the observer, the facade presents a stark tension between weight and weightlessness. The monumental, rough-textured concrete portals and solid top-heavy formwork represent mass, while the deeply recessed, highly transparent glass bands and thin suspension rods communicate lightness. The deep shadow lines cast by the concrete overhangs add three-dimensional depth and dynamic contrast.

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Sources

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