Beam bridge is the oldest and the simplest kind of bridge. It is additionally known together a girder bridge or stringerbridge.

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the generally is composed of one or much more spans which are supported by an abutment or pier at each end.


In the past, lock may have taken the kind of a log throughout a stream however today, castle are more familiar to united state as huge box steel girder bridges. Assorted kinds that material deserve to be provided to develop a beam bridge, choose wooden planks, stone slabs, reinforced concrete, or steel.

Beam Bridge is composed of a strict horizontal structure (a beam) and two supports, one at every end, to remainder it on. These materials directly assistance the downward weight of the bridge and any web traffic traveling end it. If two or much more beams room joined rigidly together over supports, the bridge becomes continuous.

A beam bridge demands to be stiff. It requirements to resist twisting and bending under load. Normally, the deck that a beam bridge is do of reinforced concrete or metal.

The dimension of the beam, and also in particular the height of the beam, controls the distance that the beam have the right to span. Large flange rolled kind beam bridges are typically the many cost-effective form of beam building and construction that is used for beam bridges with quick spans.

There are numerous different types of beam bridges. Varieties of building could encompass having countless beams next by side with a deck across the peak of them, come the key beam either side sustaining a deck between them. The key beams can be I-beams (also known as H-beams), trusses, or crate girders.

Many criticize their structure, if others worship their simplicity and also aesthetics. Stop go v some pros and cons the beam bridges.

Table of Contents

Pros the Beam BridgeCons the Beam bridge

Pros of Beam Bridge

1. Basic Construction

Beam bridges architecture is taken into consideration to be of the most basic designs the all species of bridges. The simplest kind of Beam leg merely is composed of one very long beam the is sustained at either finish with a pier. Expanded bridges utilizing this architecture may usage multiple piers to support the load of the passenger traffic that wake up above.

2.Minimal structure Cost

Beam bridge is one of the most affordable bridge-building options that are obtainable today. The is a good way come save an important money on the building of necessary infrastructure along with design simplicity.

When you need to attach one point out to one more throughout any type of type, this advantage tends to be why the is the first choice thought about by most communities. These bridges can provide a useful alternate to arch and also suspension bridges. A beam leg is taken into consideration for locations that space cash poor, much more widely supplied in urban and also rural areas.

3.Faster construction Process

The beam bridge commonly doesn’t take much time to construct in comparison to other varieties of bridges. Because most beam bridges today room a combination of steel and also reinforced concrete, a structure project does not take long to complete. But it also depends top top the size and the ar of the project. In rural locations where transport of product is the major problem might increase construction time.

4. Helpful in almost any Location

If you encounter a leg while walking along a nature path, there is a greater chance of gift a beam bridge. Although girlfriend will discover that part beam bridges work better than others because of your placement location, this style is valuable in a selection of situations.

It is the most typical bridge supplied in highway and railroads. In highways, it can quickly and effectively provide enough support and also offering room for website traffic to flow beneath in ~ the exact same time. Indigenous walking trails to interstates, this bridge design is proven to it is in effective.

5. Multiple style Options

Beam bridges consist of one really long beam the is supported at either finish with a pier. Many beam bridges usage a side-by-side beam design that patent a deck to rest on height of the supports.

You would have actually the piers, then the under supports, and then the deck. This placement functions well through its simplicity to create a leg that works nearly anywhere. Developers can use H-beams, girders, or trusses to manage the horizontal stresses that the framework will encounter end time.

Cons of Beam Bridge

1. Limitation of the size of the Bridge

Beam bridges are often only provided for fairly short distances because, unequal truss bridges, they have actually no built-in supports. Due to the fact that the supports for a beam bridge are typically an extremely far apart, it can be daunting for the leg to preserve its structure integrity over the long haul.

With existing technologies, a single span deserve to handle about 100 meters of size for contemporary weight requirements. Anything longer than that will require extr spans, which deserve to be connected together as required to kind a much longer bridge.

2.Sagging Issues

Sagging is a usual problem v the beam bridge. The bridge’s tons will reason a bottom pulling effect. This result becomes more and more pronounced as weight is added to the bridge’s load.

Because there is no weight transfer developing on the supporting structures of a beam bridge, repetitive hefty weight on a details location can cause the leg to begin to sag. The is why you will check out some weight limits posted on small bridges in landscape communities.

3. Negative Aesthetics

The conventional beam leg looks a little like a table. You have the deck ~ above top, the support below, and piers that occupational to support the weight. By many, they room thought of as the most boring of all bridge designs. Simplicity and cost-effective construction may be an advantage, but most of the time, the is not aesthetically pleasing. There is nothing architecturally fascinating about this architecture since the looks like any kind of other roadway.

4. Gets undermine Over Time

Most beam bridges have actually an typical lifespan that 50 years or less. Beam bridges at some point wear out over time from the wear and tear of sustaining the load from the deck. Also when you use reinforced concrete and steel because that the bridge, a expectations that receives hefty traffic could have a rated expectancy of just 25 years. At some point, however, beam bridges will should be replaced.

5. Not constantly Cost-friendly

Beam bridges might be the cheapest architecture to construct from an median standpoint. However, it deserve to be expensive, also for short spans.

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A cheap product for beam bridges is concrete. However, concrete on its own is not solid enough come stand approximately high pressures of stress and anxiety (pulling). Concrete needs to be reinforced v expensive stole mesh that boosts the cost of construction.