FLORALIS is a lightweight, prefabricated, multilaminar timber structure clad in Ethylene Tetrafluoroethylene (ETFE) using a novel articulated enclosure detail. It was designed as a proof of concept to protect Petrified Tree Stumps (PTS) at Colorado’s Florissant Fossil Beds National Monument from environmental conditions while allowing visibility to visitors. The project contributes to ongoing research in reciprocal diagram form-finding methods, design optimization, robotic fabrication and CNC strategies, and the use of laser surveying to assist manual assembly processes.

FLORALIS is a prototype for a future, larger pavilion that may protect Petrified Tree Stumps (PTS) at the National Monument. PTS are exposed to environmental erosion, most notably during daily freeze-thaw cycles. The pavilion prevents further erosion by forming an enclosure around the PTS, shielding the PTS from environmental conditions while beneficially not restricting the stumps’ visibility to visitors. The funnel shell geometry was materialized as an open polyhedral lattice made of sheet timber, while an ethylene tetrafluoroethylene (ETFE) foil encloses the structure.

To achieve consistency and accuracy, the sheet timber was milled using multi-axis Computer Numerical Control (CNC). Due to the pavilion’s geometric intricacies, requiring specific dimensions and miter angles for each piece, an Application Programming Interface (API) was developed to automate the transfer of milling data from the PGS model to CNC robot. In the enclosure, the aluminum channels supporting the ETFE foils were similarly mitered, and a 3D-printable articulated secondary structural connection was developed to affix the channels to the pavilion efficiently and accurately. On-site construction was assisted with digital twin models created from photogrammetry and laser surveying, allowing for in-situ changes.

The pavilion was assembled through three trips to the site in Florissant, Colorado, and it has been outfitted with sensors to track its thermal performance.