Cedarburg Covered Bridge Measured by Laser

WGN 49-46-01

 

Ozaukee County, Wisconsin, April 15, 2010 - A 134-year-old covered bridge was given laser treatment Thursday. Two scanning lasers were used to measure each piece of the historic bridge, inside and out, and the distances between planks and trusses and ceiling beams and floorboards.

William Krueger, vice president of SightLine, uses a 3-D laser scanner to document how the covered bridge was constructed. The scanners were moved several times along the length of the bridge to ensure all sides of boards were measured by the lasers.

Continuous scanning - recording 120,000 measurements per second - created 3-D images of the structure. The scanners were moved several times along the length of the bridge to ensure all sides of boards were measured by the lasers. The information will provide a detailed, as-built description to benefit workers in the future.

The 120-foot span was built in 1876 to cross Cedar Creek using a Town Truss.

For the story and photos, go to: http://www.jsonline.com/news/ozwash/91002129.html.