Project Link & Video : https://opnarchitects.com/portfolio/rudd-public-library/
An industry/academic collaboration between OPN Architects and Iowa State University merged knowledge and resources to explore how augmented reality can enhance 3D printing. ISU researchers and OPN Architects’ Digital Practice Team tested materials, tools, and processes, resulting in 3D-printed concrete curvilinear forms that expand program space at a rural public library in Rudd, Iowa (population 348), which replaces one destroyed by a tornado.
One of the challenges of 3D printing concrete is the integration of reinforcement to add lateral stability and account for forces in tension. The researchers used AR to precisely bend rebar to be used as internal reinforcement to the correct shape. OPN developed this method to bend standard linear materials such as ½-inch EMT conduit into specific shapes by augmenting an inexpensive workbench-mounted rebar bender using Fologram for Rhino, a Microsoft Hololens 2 Mixed Reality Headset, and QR Markers to align the digital bending device with the physical one in AR space. The Grasshopper script was originally developed by Fologram (2024) and revised by OPN for this project.
AR visualization was also used during the calibration process prior to printing to confirm the object bounds and correct alignment as well as during printing to ensure precise rebar placement. Placement on site leveraged AR by visualizing each base point on the jig and points on the face of the library building.
Experimental technologies and techniques can bring an increased sense of risk and uncertainty. Utilizing AR can bridge these gaps by depicting hard-to-visualize concepts to ensure a mutual understanding and improve outcomes.
Team
Shelby Elizabeth Doyle, Iowa State University
Nick Senske, Iowa State University
Jacob Gasper, OPN Architects
Jamie Craine, OPN Architects
Hugh Soward, OPN Architects