Project Goals
Perform as-built survey of truss connection details for dome trusses
Create scanned image of dome structure itself
Project Facts
All truss joint details were inaccessible
100-foot-high by 40-foot-wide dome scanning area
Scan time: 1.5 hours
Post-processing time: 1 hour
Project performed February 1998
Cyrax Benefits
Ability to measure inaccessible structures accurately and rapidly
Collection of additional measurements for future use
Ability to do as-builts without disrupting ongoing construction
Description
The location of the trusses and joints made them virtually inaccessible for traditional manual measuring methods. Even electronic total station measuring techniques were not feasible, as there was no reasonable way to attach EDM 'reflecting targets' to the bolts. Cyrax's reflectorless, remote scanning capability was able to overcome these problems and generate useful results.
All of Cyrax scanning was done from one setup on a balcony part way up the domed section of the hall. The unit was rotated and angled from this single setup to perform four different scans.
Another Cyrax advantage was that its use did not interfere with the ongoing construction work at the site. in addition to the practical benefit of using Cyrax, the City of San Francisco was interested in storing all information collected for potential future use.
All of the above work was performed through Bergen Industries for the City of San Francisco.
