Epiphytic-Retrofitting: Wooden Structures to Top Out Unfinished Constructions on the Galapagos by Paula Cano-Vergara, M. Arch ’24
University of Texas at Austin | Advisor: David Heymann
Epiphytic-Retrofitting: Wooden Structures to Top Out Unfinished Construction on the Galapagos Research explores potential applications of lightweight timber members to envision design possibilities that might lead to more environmentally responsive architecture, endemic to the Galapagos Island in Ecuador.
The study focuses on ten wood species, both endemic and introduced—Avocado, Bamboo, Black Carob, Cascarilla Cinchona, Guava, Galapagos Guava, Machinel, Mahogany, Matazarno, and Spanish Cedar—to explore how timber can replace conventional construction methods and address rapid urbanization and the prevalence of unfinished concrete structures.
The title emphasizes two concepts: “Epiphytic,” referring to plants that use other vegetation for physical support rather than nutrients, and “Retrofitting,” a sustainable method for vertical growth and densification. The project aims to protect the fragile ecosystem by reducing the exploitation of natural resources and restoring endemic vegetation. The proposed vertical expansion utilizes lightweight timber from six selected species to complete unfinished buildings, up to 5 floors total.
The structural capacity of each species is determined by grain structure, categorized into three main types: 1) Curvy and wavy, 2) Irregular, and 3) Straight grain. Structural elements are designed based on standard branch and trunk diameters and lengths, with Mahogany and Matazarno ideal for joints, Spanish Cedar and Guava for primary and secondary elements, and Avocado and Carob for cladding and decking planks. The proposal also includes three vertical growth strategies that prioritize efficiency by branching to the nearest points from the top element to the next floor, based on [the types of] tree branching: Dichotomous, Monopodial, and Sympodial. Additionally, trusses integrate the vertical elements and transfer loads to concrete frames ranging from 3x3m to 9x15m.
Despite common perceptions of timber as an unsafe and inferior material compared to its competitors, this research advocates for its potential in developing safe, low-carbon buildings. Timber supports better forest management, curbs deforestation, and promotes the use of locally-sourced materials. Additionally, the research serves to protect and contribute data records of remote geographies like the Galapagos Island, the “living museum and showcase of evolution.”
This thesis was selected for the Innovation and Material category, Fall 2024.
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