What is the Advantage and Disadvantage of galvanized highway w beam guardrail company

Metal beam crash barriers are an efficient road safety device that protects the vehicle and its occupants in the event of an accident and acts as an outstanding visual aid for drivers, particularly at night.

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Metal beam crash barriers are located on approaches to bridge structures, at horizontal curves, and at locations where the embankment height is more than 3 m.

In this article, we shall discuss the material specifications, construction operation, erection, and advantages of metal beam crash barriers.

Material Specifications

1. The metal beam rail and the railing post shall be made of corrugated sheet steel beams of the class, section, type, and thickness as specified in the plans.
2. All complete steel rail elements, posts, terminal sections, nuts, bolts, hardware, and other steel fittings shall be galvanized.
3. All railing elements shall be free from rough or sharp edges and abrasions and shall not be kinked, twisted, or bent. 
4. Unless otherwise specified, the steel beam elements and terminal sections shall be galvanized (zinc-coated, 0.55 kg per square meter, minimum single spot).
5. All galvanizing works shall be done after fabrication.

Construction Operations 

1. The grade and line of railing shall be true and as shown in the plans.
2. The railing shall be carefully placed prior to fixing in place to ensure correct alignment, proper matching at abutting joints, and camber throughout its length.
3. The holes for field connections shall be drilled with the railing in place in the structure at proper grade and alignment.
4. If the sections are not galvanized, the railing steel posts shall be painted one shop coat (primer) and three coats of paint after erection.
5. Any part of the crash barrier below ground shall be painted with three coats of red lead paint.
6. The splices and end connections must be strong enough to allow the rail parts to reach their maximum design strength.

Installation of Posts

1. The holes must be excavated or drilled to the depth specified in the drawings, or the posts may be driven using permitted methods and equipment, providing they are constructed in the appropriate location and are free from deformation, burring, or other damage.
2. All post holes excavated or drilled must be large enough to allow for appropriate post-placement and enough room for backfilling and tapping.
3. The holes must be backfilled with chosen earth or stable materials in layers no thicker than 100 mm, with each layer properly tamped and rammed.
4. The post holes that are drilled in rock and holes for anchor posts shall be backfilled with concrete.
5. The posts for metal beam guardrails on bridges shall be bolted to the structure.
6. Anchor bolts must be placed at the appropriate location and height using templates and thoroughly verified.

Erection of Crash Beam

1. All guardrail anchors must be installed, and attachments must be fabricated and assembled in the locations specified on the drawings.
2. All bolts or clips used to secure the guardrail or fittings to the posts must be tightly pinned. 
3. Each bolt must be long enough to extend at least 6 mm through and beyond the entire nut.
4. In the case where such extensions might interfere with or endanger traffic, the bolts shall be cut off flush with the nut.
5. All railings must be built, pulled, and adjusted so that the longitudinal tension is consistent over the entire length of the rail.

Tolerance 

In a length of 3 meters, the posts must be vertical with a tolerance of no more than 6 mm. 

Advantages of Crash Barrier

1. Reduced Traffic Jams and Congestion

The crash barriers have a significant influence on decreasing traffic congestion and bottlenecks. Less traffic congestion leads to safer and more efficient driving.

2. Increased Road Safety 

The significant advantage of employing the crash barrier is enhanced highway and road safety, which results in fewer accidents. These crash barriers are intended to improve road safety by shielding cars and drivers from collisions.

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These crash barriers are useful in preventing an out-of-control car from entering the opposing lane, therefore avoiding direct collisions.

3. Low Maintenance

The crash barriers require less maintenance than any other type of road safety barrier. They are tough and can readily sustain severe hits. Furthermore, the crash barrier is designed to last at least 30 years with minimal maintenance.

Why galvanized steel guardrail is widely used?

galvanized steel guardrail are widely used in daily life, such as the fences surrounding residential areas, which are usually made of this type of guardrail, which is made of zinc alloy. So, what are the specific characteristics of galvanized steel guardrail?

• It has the characteristics of high strength and high hardness, and the galvanized steel guardrail has a beautiful appearance, bright colors, and rich colors. Users can choose different colors according to their needs and preferences. At present, galvanized steel guardrail have become the mainstream guardrail products used in residential communities.

• It is very easy to install because it adopts a non-welding insertion combination method.

• The thickness of the substrate is generally about 3 times that of stainless steel, and there are more than 500 colors for customers to choose from.

• The surface is treated with anti-oxidation powder electrostatic spraying technology, which effectively enhances the anti-oxidation ability of galvanized guard rail and has extremely strong corrosion resistance.

• The screws used are made of stainless steel material and have anti-theft functions.

In summary, galvanized steel guardrail is widely used in life because of the aforementioned advantages and are deeply favored by everyone. When customers choose galvanized steel guardrail, they can choose more suitable colors according to their needs and surrounding environment.

If there are special requirements, it can be customized according to various complex terrains and topography. The service life of this type of guardrail is extremely long, and it has good self-cleaning performance. After being washed by rainwater, it can be as clean as new.

How is the safety performance of galvanized steel guardrail?

The popularity of galvanized steel guardrail exceeds the imaginations of many people, and it has a wide range of applications, with many product types that can be used in residential communities, industrial parks, school venues, road projects, etc.

The galvanized steel guardrail adopts an assembly design, so how is the safety performance of galvanized guard rail? Assembly galvanized steel guardrail are assembled by mechanical equipment through punching and insertion. There is no problem of solder joints of welded guardrails becoming detached or rusting. The raw materials used are strong and have strong impact resistance.

The galvanized steel guardrail is fixed to the building body by expansion screws, so its safety is partly due to the product itself and partly due to whether the installation is implemented according to the standard.

If the galvanized steel guardrail product is installed improperly, it is very likely to produce safety risks. Firstly, the building body on which it is installed must meet the hardness requirements and be flat and cannot be in a loose state. When punching galvanized guard rail, it must be punched accurately, the expansion screw must also be of good quality, and the length should be suitable. In the installation process of galvanized steel guardrail, if these problems are handled properly, then its safety is not a problem.

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