{"id":13241,"date":"2023-02-17T02:29:49","date_gmt":"2023-02-17T10:29:49","guid":{"rendered":"https:\/\/essential.construction\/news\/explainer-diagrid-structural-framework-urbantoronto\/"},"modified":"2023-02-17T02:29:50","modified_gmt":"2023-02-17T10:29:50","slug":"explainer-diagrid-structural-framework-urbantoronto","status":"publish","type":"post","link":"https:\/\/essential.construction\/news\/explainer-diagrid-structural-framework-urbantoronto\/","title":{"rendered":"Explainer: Diagrid Structural Framework | UrbanToronto"},"content":{"rendered":"

\"-\"<\/a>
\n<\/p>\n

\n

Ever run into the word ‘diagrid’ and wonder what it means? This week’s Explainer<\/a>\u00a0delves into this specialized structural framework, in use since the late 19th century. Although the building method was not originally popularized, diagrids are popping up in many modern projects all over the world today. So, why do some buildings use diagrid structures, and how is it unique to other frameworks?<\/p>\n

30 St Mary Axe in London, image by Marcus Mitanis<\/span><\/p>\n

A portmanteau of diagonal grid, the diagrid is a visible architectural element of several recent world-famous buildings. Beyond its eye-catching aesthetic value, the framework of diagonally intersecting metal, concrete, or wood yields structural benefits. Providing strength and stiffness to buildings, particularly those with complex geometries, a diagrid framework requires less structural steel, by up to 25 percent, than a conventional steel frame.<\/p>\n

Hearst Tower in New York City, image by Marcus Mitanis<\/span><\/p>\n

The diagonal members support gravity loads and lateral forces instead of the usual vertical columns. Buildings that utilize the diagrid system are generally free of intrusive interior columns, giving way to large and open floor plans.\u00a0When the steel members are sheathed in glazing, it not only highlights the unique structural elements of the building, but creates an environment with an abundance of natural light.<\/p>\n

The Bow in Calgary, image by Flickr Antoine 49 via Creative Commons<\/span><\/p>\n

The diagrid system, however, is arduous to implement; complicated computer models and construction methods require experienced engineers, architects, and contractors. For steel diagrid structures, the prefabrication process can add significant costs to the project. Similarly, concrete diagrid structures require a vast amount of formwork.\u00a0<\/p>\n

Award-winning British architect\u00a0Norman Foster<\/a>\u00a0has earned a global reputation for his firm’s diagrid-rich designs. The Hearst Tower in\u00a0New York City<\/a>\u00a0\u2014 which utilizes 21 percent less steel than a typical design \u2014 is one of the most famous examples of a diagrid framework. Two of Foster’s other designs, 30 St Mary Axe in\u00a0London<\/a>\u00a0and The Bow in\u00a0Calgary<\/a>, are among their other most lauded works. In Toronto, Foster + Partners’ design for The One<\/a> does not feature a diagrid, but its design shares some of the principles of diagrid design through the “hangers” that support the corners of the building, their loads supported from the perimeter supercolumns.<\/p>\n

The One in Toronto, does not have a diagrid structure, but shares some principles with diagrid design, image courtesy of Mizrahi Developments<\/span><\/p>\n

Have any other construction and development related terms that you would like to see featured on Explainer? Share your thoughts and questions in the comments section below!<\/p>\n

* * *<\/p>\n

From 2015 to 2017, UrbanToronto and its sister publication, SkyriseCities, ran an occasional series of articles under the heading\u00a0Explainer<\/strong><\/em>. Each one took a concept from Urban Planning, Architecture, Construction, or other topics that often wind up in our publications, and presented an in depth look at it. It’s time to revisit (and update where necessary) those articles for readers who are unfamiliar with them. While you may already know what some of these terms mean, others may be new to you. We are publishing or updating and republishing\u00a0Explainer<\/strong><\/em>\u00a0on a weekly basis. This article is an update of\u00a0one by Marcus Mitanis<\/a>\u00a0that was originally published in 2017.<\/p>\n

* * *<\/p>\n

Do you have other planning terms that you would like to see featured on\u00a0Explainer<\/strong><\/em>? Share your comments and questions in the comments section below!<\/p>\n

* * *<\/p>\n

Want to read other\u00a0Explainers<\/strong><\/em>? Click on the magenta\u00a0Explainer<\/strong><\/em>\u00a0box at the top of the page.<\/p>\n

* * *<\/p>\n

UrbanToronto has a research service,\u00a0UrbanToronto Pro<\/a>, that provides comprehensive data on construction projects in the Greater Toronto Area\u2014from proposal through to completion. We also offer\u00a0Instant\u00a0Reports<\/a>, downloadable snapshots based on location, and a daily subscription newsletter,\u00a0New Development Insider<\/a>, that tracks projects from initial application.<\/p>\n<\/div>\n