Yes! All type of bridges are safe, provided they are designed and executed properly. There are many factors that decide the type of a proposed bridge. It could be the span of bridge, depth of river, asthetics, budget restrictions, availability of materials, etc.
The Tacoma Narrows Bridge was built in a location with high winds. High velocity winds can create an aerodynamic instability called flutter. Flutter may be mitigated by a stiff structure. That bridge was very flexible in torsion (more commonly known as twist). There were many warning signs of a disaster - the bridge had wild oscillations in high winds many times before it collapsed. If you ever see a video of a stop sign rotating about its post in a hurricane, as often done by on scene news crews, the phenomenon is completely analogous. Of course, during "normal" winds, the stop sign would not flutter - during the hurricane the wind speed exceeds the speed when we see the onset of flutter. All aircraft are designed to ensure the maximum speed of the aircraft is below the speed at the onset of flutter for its wings and other lifting surfaces. Here as well, the wing design may be stiffened if required to raise the flutter onset speed. After the Tacoma Narrows Bridge collapsed, many bridge designs were reviewed by engineers to ensure they would not have the same fate. The Whitestone Bridge, which crosses the East River from Queens to the Bronx in New York, was one that was stiffened by side bracing to raise the torsional stiffness and remove the concern about flutter. To my knowledge, that bridge was never subject to winds at a high enough speed in its pre-stiffened state to induce severe oscillations like those seen on the Tacoma Narrows Bridge.
advantages of depth first search?
Total Depth - cover
what is the standard depth of stairs
A "depth gauge micrometer" is used by engineers. A depth gauge micrometer is a precision instrument used to measure various depths of different items.
A micrometer can perform all of those measurements
*Micrometer have a rotary handle and whereas vernier have a slider. *Micrometer is for measuring diameters while vernier is for measuring inside & outside diameter as well as depth. *Least Count of Vernier Caliper is 0.02mm *Least Count of Micrometer is 0.01mm
The tree should be planted to the same depth as it was grown before lifting.
Drops off to an abyss depth of 500 ft underneath the North tower.
The magnet on the surface and the metal 300 ft down - no. Lowering the magnet to the metal, then lifting - yes.
the best accurateIn the estuary the charted depth (which can for most general purposes be considered as the depth at low water) is about 20 metres at its deepest . To get the depth of water at Mean High Water Springs (MHWS) you can add about 5 metres to that depth. At Mean High Water Neaps (MHWN) you only need to add about 4 metres.At London Bridge the charted depth is about 1.8 metres. Add about 7.1 metres to get the depth of water at MHWS and 5.9 metres at MHWN.Given it is 215 miles long and continually in motion there would be hundreds of ever changing measurements.
Use a chart which shows the depth of water to plot where you want to go and where you are.
Yes! All type of bridges are safe, provided they are designed and executed properly. There are many factors that decide the type of a proposed bridge. It could be the span of bridge, depth of river, asthetics, budget restrictions, availability of materials, etc.
There's no single right answer that will cover any 20' sloop, the size and shape of the keel the form of the hull and how the sails are ballanced will all affect what size rudder is needed, as well as the shape of it. Also the answer will depend on what handling characteristics are desired. As for just the depth of the rudder, usually it will go to slightly less depth than the keel when the keel is at it's deepest. Some lifting keel yachts, especially smaller ones, also have a lifting rudder.
The usual engineering principles apply: the lightest possible beam has the greatest depth, with suitable struts along the length.
the best accurateIn the estuary the charted depth (which can for most general purposes be considered as the depth at low water) is about 20 metres at its deepest . To get the depth of water at Mean High Water Springs (MHWS) you can add about 5 metres to that depth. At Mean High Water Neaps (MHWN) you only need to add about 4 metres.At London Bridge the charted depth is about 1.8 metres. Add about 7.1 metres to get the depth of water at MHWS and 5.9 metres at MHWN.Given it is 215 miles long and continually in motion there would be hundreds of ever changing measurements.