A major advantage of arch bridges is the fact that they are structurally sound for short spans, while a major disadvantage includes the amount of building materials needed to construct an arch bridge, even if it is of short length. Other advantages of arch bridges include the inexpensive costs of building materials such as stone and brick, and the ability to build more arches to span a wider distance.Continue Reading
Another disadvantage of an arch bridge is that the bridge requires more support from the sides than a normal bridge. An arch bridge must be situated where there are structurally sound banks or abutments in order to help support it.
An arch bridge is aesthetically pleasing, but it can be difficult to find local materials for the construct of the bridge. In modern times, concrete is a popular material to build an arch bridge, however, it is much more costly than stone or brick.
The modern version of the arch bridge is known as the long-span through arch bridge. While not as aesthetically pleasing, it is a structurally sound bridge comprised of lighter materials. It can be made of steel and will cover a longer span. An example of this type of bridge is the Sydney Harbor Bridge that is found in Australia.Learn more about Architecture
An interesting fact about beam bridges is that the world's longest bridge is a beam bridge called the Lake Ponchartrain Causeway; it is nearly 24 miles in length. Beam bridges are not normally used for long distances because they weaken when the supports are far apart. A long stretch is actually composed of multiple beam bridges that have been put together using a process known as daisy chaining.Full Answer >
One advantage of wearable computers is that a user is in constant interaction with his computer, but a disadvantage is that these computers are heavy. As a user goes from place to place with his computer, it offers him flexibility to work from virtually anywhere. In addition to convenience, the device is not misplaced because it is always on the owner's body.Full Answer >
Perhaps the greatest advantage of leasing a vehicle is a lower monthly payment; the biggest disadvantage is the lack of ownership at the end of the lease. Whether or not a lease is the right decision ultimately depends on the motorist's lifestyle and preferences, cites 'Edmunds.'Full Answer >
The main advantage of WiMAX is that it allows high-speed wireless Internet connections over a broad coverage area, while the main disadvantage is that it is expensive to install. Companies and municipalities set up WiMAX networks to provide home or mobile Internet access throughout an entire city or county.Full Answer >