Engineering:One-plus-five

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One-plus-five style apartment buildings in Austin, Texas

One-plus-five, also known as five-over-one, or a podium building,[1] is a type of multi-family residential building commonly found in urban areas of North America.[2][3] The mid-rise buildings are normally constructed with four or five wood-frame stories above a concrete podium (usually for retail or resident amenity space). The one-plus-five style of buildings exploded in popularity in the 2010s, following a 2009 revision to the United States-based International Building Code, which allowed up to five stories of wood-framed construction.[4]

Description

Apartment buildings in Long Branch, New Jersey featuring three wood-frame stories over a concrete podium

The first recorded example of one-plus-five construction is an affordable housing apartment building in Los Angeles built in 1996.[5] The wood-framed one-plus-five style is popular due to their high density and relatively lower construction costs compared to steel and concrete.[6] One-plus-five buildings often feature secure-access interior hallways with residential units on both sides, which favors a U, E, C, or right-angle building shape.[5] The exteriors of one-plus-fives often contain flat windows, rainscreen cladding, and Hardie board cement fiber panels.[2]

These buildings are also sometimes called a Wrap or Texas Doughnut, which describes a multifamily building which is wrapped around a parking garage in the center.[7][8] This style is common in areas with higher minimum parking requirements.[5]

Criticism

One-plus-five buildings are often criticized for their high fire risk[9] as well as their blandness.[2][5][10] Some cities and jurisdictions have considered additional regulations for multi-story wood-framed structures. The city of Waltham, Massachusetts called for legislation to prevent the construction of multi-story wood-framed buildings, which was introduced following a fire at an under-construction wood-framed condominium in the city.[11] The borough of Edgewater, New Jersey introduced a resolution calling on the state of New Jersey to enact stricter fire safety regulations for wood-framed buildings, following a large fire that occurred in the wood-framed Avalon at Edgewater apartments in 2015.[12]

See also

References

  1. ↑ WoodWorks Wood Products Council. "What is the code compliance path that allows podium-style stacked buildings? Are there limitations on the number of podium stories?". https://www.woodworks.org/experttip/code-compliance-path-allows-podium-style-stacked-buildings-limitations-number-podium-stories/. Retrieved August 12, 2019. 
  2. ↑ 2.0 2.1 2.2 Sissom, Patrick (December 4, 2018). "Why do all new apartment buildings look the same?". Curbed. https://www.curbed.com/2018/12/4/18125536/real-estate-modern-apartment-architecture. Retrieved February 23, 2019. 
  3. ↑ Fesler, Stephen (2018-05-23). "City Council Allows Taller Wood Buildings, Reforms Street Vacation Process and Advances Waterfront LID" (in en-US). https://www.theurbanist.org/2018/05/23/city-council-allows-taller-wood-buildings-reforms-street-vacation-process-advances-waterfront-lid/. 
  4. ↑ "Multi-Story Wood Construction". Engineering News-Record. March 26, 2012. https://www.awc.org/pdf/education/des/ReThinkMag-DES515A-MultistoryWoodConstruction-140210.pdf. Retrieved February 23, 2019. 
  5. ↑ 5.0 5.1 5.2 5.3 Fox, Justin (February 13, 2019). "Why America’s New Apartment Buildings All Look the Same". Bloomberg Businessweek. https://www.bloomberg.com/news/features/2019-02-13/why-america-s-new-apartment-buildings-all-look-the-same. Retrieved February 23, 2019. 
  6. ↑ Azoff, Rachel A. (July 1, 2009). "Multifamily Developers Turn to Wood-Frame Construction to Cut Costs". Multifamily Executive. https://www.multifamilyexecutive.com/design-development/construction/multifamily-developers-turn-to-wood-frame-construction-to-cut-costs_o. Retrieved February 23, 2019. 
  7. ↑ Kostelni, Natalia (June 27, 2014). "Developer to break ground on apartment complex in King of Prussia". Philadelphia Business Journal. https://www.bizjournals.com/philadelphia/blog/real-estate/2014/06/developer-to-break-ground-on-apartment-complex-in.html?page=all. Retrieved February 23, 2019. 
  8. ↑ Holstein, Amara. "A Fresh Flavor of the Texas Doughnut". Build A Better Burb. http://buildabetterburb.org/a-fresh-flavor-for-the-texas-doughnut/. Retrieved February 23, 2019. 
  9. ↑ Sperance, Cameron (August 3, 2017). "CRE Hypes Safety Of Wood-Frame Construction In Wake Of National Fires". Bisnow Boston. https://www.bisnow.com/boston/news/multifamily/fire-inspired-end-of-wood-frame-construction-could-halt-affordable-housing-77348. Retrieved February 23, 2019. 
  10. ↑ Portillo, Ely (December 19, 2015). "Why so many of Charlotte’s new apartments look alike (and why some are calling for change)". Charlotte Observer. https://www.charlotteobserver.com/news/business/article50548575.html. Retrieved February 23, 2019. 
  11. ↑ Laidler, John (August 1, 2017). "Waltham fire spurs call for tighter state building code". Boston Globe. https://www.bostonglobe.com/metro/2017/08/01/waltham-fire-spurs-call-for-tighter-state-building-code/PdmqXCmlZxecwDlSnelYMN/story.html. Retrieved February 23, 2019. 
  12. ↑ Curley, Michael W. (March 23, 2018). "Edgewater wants law to prevent fires like Avalon". Bergen Record. https://www.northjersey.com/story/news/bergen/edgewater/2018/03/23/edgewater-nj-prevent-fires-avalon-assembly-senate/449604002/. Retrieved February 23, 2019. 




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