{"id":1552,"date":"2008-09-17T14:16:44","date_gmt":"2008-09-17T18:16:44","guid":{"rendered":"https:\/\/engineering.jhu.edu\/magazine-archive\/?p=1552"},"modified":"2014-12-17T14:17:04","modified_gmt":"2014-12-17T19:17:04","slug":"designing-minds-bridge-buddies","status":"publish","type":"post","link":"https:\/\/engineering.jhu.edu\/magazine-archive\/2008\/09\/designing-minds-bridge-buddies\/","title":{"rendered":"Designing Minds: Bridge Buddies"},"content":{"rendered":"
\"Civil<\/a>
Civil engineering students created theoretical plans for the renovation of Gilman Hall, including this plan created by undergraduates Jesse Richter, Zach Rosswog, and Josh Hoagland.<\/figcaption><\/figure>\n

Few visitors to Homewood\u2019s gilman Hall realize that the second floor passage leading into the Hutzler Reading Room is built on a steel girder truss bridge spanning what was once an open courtyard. Decades ago, that breezy courtyard was enclosed to provide a home for the university bookstore, with the store\u2019s ceiling suspended from the trusses above. Plans for the renovation of gilman Hall now under way call for the removal of the bridge, to be replaced with a soaring glass-roofed atrium.<\/p>\n

But 15 Civil Engineering seniors in their capstone Design and Synthesis II class were asked to imagine a different future: How could the goals of the three-year, multimillion dollar gilman Hall renovation be achieved while at the same time preserving and incorporating the second floor
\ntruss bridge?<\/p>\n

\u201cOur theme has been preservation engineering,\u201d says Michael Palantoni \u201908, explaining that the first step in preserving any structure is first finding out how it\u2019s put together. \u201cPart one is an existing condition survey, which means doing a detailed structural analysis of the building in its current state.\u201d In several hard-hat visits to the construction site, students went at the passageway with hammers and saws to see past finished walls, floors, and ceilings for a good look at the bones of the bridge.<\/p>\n

\u201cWe probed into the bridge by taking out sheet walls to see the old steel connectors,\u201d Palantoni says. \u201cIt was an interesting challenge. The roof is very complex and involved.\u201d Site visits gave the students an opportunity to do field drawings and take careful measurements, which they subsequently employed to calculate the strength and capacity of the existing structure. On another visit, the site construction supervisor took them from the basement to the attic level of gilman Hall for an up-close look at building practices from nearly a century earlier. \u201cYou can see how columns change in size as they descend through the building,\u201d reports Palantoni. He adds, \u201cYou don\u2019t see structural brick nowadays, and you know when you see a three-foot-thick brick wall you\u2019ve got some pretty serious structural elements.\u201d<\/p>\n

After probing, measuring, and calculating, the students were ready to begin designing. They broke into groups of three and began imagining new uses for an old bridge. \u201cThe biggest thing in trying to use an existing structure is figuring out how to do it economically,\u201d says Zach Rosswog \u201908. \u201cOur group opted to keep existing steel columns in place, but proposed welding steel plates to their sides in order to increase load capacity.\u201d<\/p>\n

In final presentations each of the five student groups had to solve a complex set of design criteria, which called for allocating space for a 1,500-square-foot lecture hall, creating mechanical space at or below the second floor level, preserving the existing bridge while adding north\/ south traffic flow to its east\/west axis, and covering the final structure with a glass roof above the fourth floor level. Most of the groups opted to strip the bridge of its original brick cladding to expose and highlight its steel truss structure. Proposals also included adding new stairways or separate bridge walkways to accommodate north\/south pedestrian traffic. Each team made a detailed presentation before their classmates
\nand a group of engineering faculty and construction experts, who critiqued the work.<\/p>\n

The students found that when moving from theory to practice, experience counts. \u201cThe biggest challenge in any project, but especially something like this, is generating an actual way of accomplishing your concept,\u201d says Palantoni. \u201cIt\u2019s connecting what you want to do with what actually exists, and resolving all the structural issues.”<\/p>\n","protected":false},"excerpt":{"rendered":"

Few visitors to Homewood\u2019s gilman Hall realize that the second floor passage leading into the Hutzler Reading Room is built on a steel girder truss bridge spanning what was once an open courtyard. Decades ago, that breezy courtyard was enclosed to provide a home for the university bookstore, with the store\u2019s ceiling suspended from the…<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[75],"tags":[],"class_list":["post-1552","post","type-post","status-publish","format-standard","hentry","category-research-development","issue-fall-2008"],"acf":[],"yoast_head":"\nDesigning Minds: Bridge Buddies - JHU Engineering Magazine<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/engineering.jhu.edu\/magazine-archive\/2008\/09\/designing-minds-bridge-buddies\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Designing Minds: Bridge Buddies - JHU Engineering Magazine\" \/>\n<meta property=\"og:description\" content=\"Few visitors to Homewood\u2019s gilman Hall realize that the second floor passage leading into the Hutzler Reading Room is built on a steel girder truss bridge spanning what was once an open courtyard. 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