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The 6th International Project and Construction Management Conference (e-IPCMC 2020)

Author(s): Merve Ceylin Atikoğlu, Gelareh Tanideh, Sahra Shakouri and Aisan Gharbi Oskouei

Title: Comparative Life Cycle Carbon Footprint Analysis: A Case Study of Concrete-framed, Steel-framed and Timber-framed Tiny House

Abstract: The selection of building materials not only requires material properties and initial costs but also carbon emissions over the life of the building. This study compares three commonly-used building materials, namely concrete, steel, and timber, by life cycle assessment (LCA) methodology based on their carbon footprint. A 25 m2 tiny house located in Ankara, Turkey, is designed as concrete-, steel-, and timber-framed structures. While the structural design of the systems showed variations, the architectural, mechanical, and electrical systems are considered the same. OneClick LCA plugin for Revit Architecture is used. The system boundary includes product stage, construction stage, and end of life stage; but excludes use stage due to rough assumptions for inventory and impact analyses in Turkey. Results revealed 462 kg CO2e for concrete, 447 kg CO2e for timber, and 420 kg CO2e for steel. The primary source of CO2e belongs to production and end of life phases. All three cases have approximately the same CO2 in the production stage, but the construction stage is higher in concrete case, while the end of life stage is higher in timber case. The results are expected to increase awareness of global warming potential of selected materials that lead to sustainable construction.