an official journal of: published by:
Editor in Chief: RAFFAELLO COSSU


  • Daniel Marshall - Department of Architecture, Massachusetts Institute of Technology, United States
  • Caitilin Meuller - Department of Architecture, Massachusetts Institute of Technology, United States
  • Brandon Clifford - Department of Architecture, Massachusetts Institute of Technology, United States
  • Sheila Kennedy - Department of Architecture, Massachusetts Institute of Technology, United States

DOI 10.31025/2611-4135/2020.13967

Released under CC BY-NC-ND

Copyright: © 2020 CISA Publisher

Editorial History

  • Received: 27 Jan 2020
  • Revised: 23 Mar 2020
  • Accepted: 06 Apr 2020
  • Available online: 23 Jul 2020


The average builder in the USA provides a warrantee for 10 years, and the US Department for Energy calculates that US office buildings have an average lifespan of 73 years. No building is permanent, and all will face demolition at some point. When a building comes to the end of its safe and useful lifespan, there is no method for re-using the material in new buildings, instead, all constructions today require virgin material. This is a problem for sustainability because US cities, like most other global cities, require cyclical replacement of ageing buildings, and therefore perpetual resource extraction. This paper provides techniques for computationally arranging materials after the demolition and unmaking of architecture. Rather than downcycling concrete into low-value aggregate or melting float glass into opaque bottles methods are shown for this material to be indexed, re-machined and algorithmically arranged into new assemblies. These assemblies are conceived of as holding patterns; an indexed library of materials that are put into useful architectural arrangements, but ready to be disassembled towards some future use. These holding patterns are used as infill to the city rather than landfill beyond. Rather than building for sixty-year life spans, the project offers an imagination of eternal re-constructions that can learn from the carcass of past buildings. Based on rough estimates  2016 could be the first year where there exists more than one trillion tons of concrete on earth. More than the total weight of living trees on the planet (Crowther et al. 2015; USGS, 2018). This paper begins to develop new aptitudes for re-fitting misfit material rather than consuming evermore.



Ahuja, R.K., Magnanti, T.L., Orlin, J.B., 1993. Network Flows: Theory, Algorithms, and Applications, Prentice Hall

Brooks, S., Smith, C.A.B., Stone, A.H., Tutte, W.T., 1940). The Dissection of Rectangles Into Squares, Duke Math Journal 7, 312–340,
DOI 10.1215/S0012-7094-40-00718-9

Clifford, B., 2017. The Cannibal’s Cookbook: Mining Myths of Cyclopean Constructions, Matter Publishing

Cormen, T., Leiserson, C., Rivest, R., Stein, C., 2001. Introduction to Algorithms (second ed.), MIT Press and McGraw-Hill

Crowther, T.W., Glick, H.B., Covey, K.R., Bettigole C. […], 2015. Mapping tree density at a global scale, Nature 525, 201–205,
DOI 10.1038/nature14967

de Graaf, R., 2017. Four Walls and A Roof the complex nature of a simple profession, Harvard University Press

de Graaf, R., 2017. How Architecture Should Adapt to Climate Change, Time Magazine

Enns, J., 2010. The New Non-Standard, Thesis Dissertation

Environmental Protection Agency, Office of Resource Conservation and Recovery, 2018. Construction and Demolition Debris Generation in the United States

Fearnside, P., 2016. Environmental and Social Impacts of Hydroelectric Dams in Brazilian Amazonia: Implications for the Aluminum Industry, World Development

Gardner, J., 2018. Beneath the rubble, the Crystal Palace! The surprising persistence of a temporary mega event, World Archaeology 50, 185–199,
DOI 10.1080/00438243.2018.1489734

Ghosn, R., El Hadi, J., 2016. Geographies of Trash, Actar

Ghosn, R., El Hadi, J., 2016. Trash Peaks, Seoul Biennale

Turan, I., 2016. From sink to stock: the potential for recycling materials from the existing built environment, MIT Thesis

Koren J., 2017. Why builders of big L.A. projects are making concrete with gravel and sand shipped from Canada, L.A. Times

Jacobs, J., 1961. The Death and Life of Great American Cities” New York: Random House

Koolhaas, R., 2002. Junkspace, October 100, 175–190,

Lynn, G., 2008. Recycled Toy Furniture, Universität für angewandte Kunst Wien

Mckinsey&Co, 2017. The growing importance of steel scrap in China

Moe, K., 2017. Empire, State & Building, Actar

Mollica, Z., Self, M., 2016. Tree Fork Truss – Geometric Strategies for Exploiting Inherent Material Form” in Advances in Architectural Geometry

Mueller, C., Ochsendorf, J., 2015. Combining structural performance and designer preferences in evolutionary design space exploration, Automation in Construction

N.Y.C. Department of Buildings, 2018. DOB Permit Issuance: a list of permits issued by department of building since 1989

Staib, G., Dörrhöfer, A., Rosenthal, M., 2008. Components and systems - Modular building: design, construction, new technologies, Detail Magazine

Thompson, A., An evolved circuit, intrinsic in silicon, entwined with physics, Springer LNCS

U.S.E.P.A., Office of Resource Conservation and Recovery (2018) Construction and Demolition Debris Generation in the United States

U.S. Energy Information Administration, 2018. International Energy Outlook

U.S.G.S., 2018. Minerals Commodity Summaries: Cement Statistical Compendium

Witt, A. et al. 2017. Mine the Scrap, at Ars Electronica Export, Berlin, Germany