thumb|upright|Guastavino ceiling tiles on the south arcade of the [[Manhattan Municipal Building]]

The Guastavino tile arch system is a thin-tile vault system introduced to the United States in 1885 by Spanish architect and builder Rafael Guastavino (1842–1908). It was patented in the United States by Guastavino in 1892. The Guastavino Fireproof Construction Company operated from 1889 to 1962, and was headquartered in Woburn, Massachusetts, in a building of their own design which still stands; their records and drawings are preserved by the Department of Drawings & Archives in the Avery Architectural and Fine Arts Library.

Description

thumb|Guastavino tile vaulting in the [[City Hall station (IRT Lexington Avenue Line)|City Hall station of the New York City Subway]]

Guastavino vaulting is a technique for constructing robust, self-supporting arches and architectural vaults using interlocking terracotta tiles and layers of mortar to form a thin skin, with the tiles following the curve of the roof as opposed to horizontally (corbelling), or perpendicular to the curve, as in Roman vaulting. The technique is known as timbrel vaulting (because of its supposed likeness to the skin of a timbrel or tambourine), Catalan vaulting, or "compression-only thin-tile vaulting".

The Guastavino terracotta tiles are standardized, less than thick, and about across. They are usually set in three herringbone-pattern courses with a sandwich of thin layers of Portland cement. Unlike heavier stone construction, these tile domes could be built without centering. Supporting formwork was still required for structural arches which established a framework for the ceiling. The large openings framed by the support arches were then filled with thin Guastavino tiles fabricated into domed surfaces. Each ceiling tile was cantilevered out over the open space, relying only on the quick-drying cements developed by the company.

Guastavino believed that his system represented an innovation in structural engineering, as his tile system allowed for architectural solutions that were impossible with traditional masonry arches and vaults. Subsequent research has shown the thin-tile vault is comparable to the masonry vault, but with a lighter weight, permitting flatter arch profiles. These flatter profiles would produce unacceptable horizontal thrust if constructed in thicker, heavier masonry.

<gallery mode="packed" caption="Construction of Guastavino tile arches in McKim Building at Boston Public Library (1889)" >

Tile work on Guastavino arches, construction of the McKim Building - DPLA - d9ca27663b027769e3b2b9a0a5c8b00e.jpg |Steel I-beams framing the building provide structural support for Guastavino tile arches

File:Laying of Guastavino tile arches along Boylston Street, construction of the McKim Building - DPLA - 8ef5540ef15b92dccbea637ebf98e5a6.jpg |Formwork for shallow tile arches along Boylston Street

Rafael Guastavino stands on recently laid tile arch along Boylston Street, construction of the McKim Building - DPLA - 29495562be5d91a3030d053e066872e3.jpg |Rafael Guastavino inspecting recently laid tile arch along Boylston Street

File:Guastavino tile arches, construction of the McKim Building - DPLA - b4d39d880c2fbc93082bcb183a771277.jpg |Workmen filling in tile vault domed ceilings

Four completed Guastavino tile arches along Boylston Street, construction of the McKim Building - DPLA - 42dcce5fd9b22eaceccff602f3c81c19.jpg |Four completed tile domes along Boylston Street

Guastavino tile arches, Dartmouth Street side, construction of the McKim Building - DPLA - 05fbfee05d83ecc9d0b32970229408b9.jpg |Tile arches along Dartmouth Street

Guastavino tile arches and buttresses in entrance hall, construction of McKim building. - DPLA - 39549a43550a32ccf558f77b5a6413b3.jpg |Tile arches and buttresses in entrance hall

Guastavino tile arches and column in entrance hall, construction of the McKim Building - DPLA - bd3775697380308236af6227b5afc24b.jpg |Closeup of completed tile arches and column in entrance hall

Supporting partitions for floor over completed Guastavino tile vaults, construction of the McKim Building - DPLA - 9454bc525f40f943dfad25d25f982924.jpg |Guastavino tile vaults are strong enough to support the flooring above.

Underside of Guastavino tile arches comprising basement ceiling, construction of the McKim Building - DPLA - 10aea730ab745d5ffe7776dceb446363.jpg |Completed tile domed ceiling in basement

File:Load test for Guastavino tile arches along Boylston Street, construction of the McKim Building - DPLA - 14e2a49af8e0eb6c85077fd5334d9baf.jpg |Load testing of tile arches

</gallery>

Installations

thumb|Cafe at [[79th Street Boat Basin#79th Street Rotunda|79th Street Rotunda in New York City]]

Guastavino tile is found in many prominent Beaux-Arts structures in the United States, particularly New York and Massachusetts. It is also found in some non-Beaux-Arts structures such as the crossing of the Cathedral of St. John the Divine.

In September 2012, the Boston Public Library (Rafael Guastavino's first major architectural work in the United States) hosted the Palaces for the People exhibition highlighting Guastavino installations and their legacy; an expanded version was later exhibited at the Museum of the City of New York in 2014.

See also

<!-- Once this list grows too large, it should be spun off as a List of Guastavino architectural installations -->

  • Akoustolith, a Guastavino company tile product
  • Glazed architectural terra-cotta
  • List of architectural vaults
  • First Church of Christ, Scientist (Cambridge, Massachusetts)
  • Ed Koch Queensboro Bridge
  • Basilica of St. Lawrence, Asheville
  • Biltmore Estate
  • Grant's Tomb
  • Grand Central Oyster Bar & Restaurant

Notes

Further reading

  • Palaces for the People via Urban Archive, an interactive map of Guastavino installations in New York City from the exhibition shown at the Museum of the City of New York
  • Guastavino.net: documenting Guastavino's work in the Boston area. This page provides copies of writings and patents by the Guastavinos as well.
  • Rafaelguastavino.com: documenting Guastavino's work in New York City
  • "CONSTRUCTION OF A VAULT", Massachusetts Institute of Technology (shows method of construction)