I ran across one of my favorite engineering videos recording the collapse of the Tacoma Narrows Bridge, AKA Gallopin Gertie. I hadn’t seen this video since high school physics class.
- Construction Start:  Nov. 23, 1938
- Construction Finish:  July 1, 1940
- 4 months later it collapse on  Nov. 7, 1940 – Caused by resonance vibration due to steady 42mph wind speeds.

The footage from November 7, 1940 was shot by Barney Elliott and his business partner Harbine Monroe who owned a nearby camera store in Tacoma – http://www.camerashoptacoma.com/.

Search YouTube for some more great videos on this collapse. Here is another one with some good information Tacoma Narrows Bridge Collapse.

The next bridge at this location was built with Stiffening Trusses instead of solid girders.

The National Renewable Energy Laboratory is currently building a new 220,000sf office building on their Golden, CO campus. It’s a ZERO Energy building meaning that it will produce the same amount of energy that it consumes, what a novel idea. Here’s a great video they’ve released with more information about the project.
Congrats to the team – Haselden Construction, RNL, Stantec, & NREL .

This project has been one of the “early adopters” using JobSiteVisitor to manage their job site photos. Haselden Construction has not only been using the program to manage their progress photos but they’ve also taken advantage of our web-cam integration.

We certainly could use more ZERO Energy projects like this across the country. It’s great to watch this project progress, what a wonderful building.

The following time-lapse videos were made from progress photos taken by Haselden Construction
Project – One Steamboat Place in Steamboat, CO.

Central Wing – North Elevation

West Wing – North Elevation

Construction of the new Phipps Gallery Renovation:
Denver Museum of Nature & Science

Special Thanks to:
Haselden Construction – Denver Museum of Nature & Science – Klipp – CB Richard Ellis

Video Produced by:
Alpine Light Pictures, Inc.

Encore Electric has been using JobSiteVisitor.com to document the progress of the Denver Courthouse.
Here’s a view of the Front Elevation, thanks Encore.