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From Historic DVDS Free Shipping Professionally Produced DVDS over 100 titles to choose from ................all Featuring Bonus Song (Blue) from A.D.H.D. Recording artist Rockman Be sure to add me to your favorites list!
3 shorts run time....
US Steel produced 16:42,
this film to brag about their bridge building subsidiaries, and rightly so. If you have crossed a BIG suspension bridge and wondered about how the heck it was built, this film will tell you. An entertaining combination of technical detail and one-of-a-kind footage.
TACOMA BRIDGE COLLAPSE..3:53
I've always been fascinated by this even myself. It was shown in one of my engineering classes. One thing we have to keep in mind is that engineering is an ever evolving area. At the time, no one would have though to apply wind tunnel testing to a bridge or some of the more exotic methods.It is quite possible that this bridge would have withstood hurricane force winds. The lower velocity winds that tore it apart hit a resonant frequency of the bridge. Winds of radically different speeds might very well have been no problem.
4:35.....
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On May-19-08 at 10:50:35 PDT, seller added the following information:
Historical Events.... Vintage History! Welcome to the Internet's top resource for premium Historical DVD's. Browse our easy to use website to find the product you are looking for. With many Catagories to choose from, famous events, great disasters, early Soundies and much more. See how the early pioneers created and shaped the way for many of the inventions we still use today. Professional produced DVD's With FREE Shipping in the USA DVD's will Ship Within 5 days and delivery within 2 weeks We Accept PayPal and all Credit cards for payment
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