Visitors take the elevator up the top floor’s observatory deck to see the breathtaking city panorama. Families and couples dine or drink champagne by the window glistening with city lights. It is the celebratory scene of US National Skyscraper Day on September 3.

This rather glamorous day commemorates the birthday of an American architect, Louis H. Sullivan also known as “father of skyscrapers” who built one of the earliest. Since then, the onset of skyscraper construction has brought about the advanced construction technology around major cities of the world.

As skyscrapers are typically approximately 40 floors (492 ft, 150 m) or taller, its construction involves impeccable framework and state-of-the-art technology for upmost safety— to support its weight and protect its habitants from natural disasters. To achieve such a feat calls for steel, the sole material relied for its unique high-strength-to-weight ratio.

Empire State Building, Landmark of the City that Never Sleeps

Originated from “Empire State”, the nickname of New York, this sparkly landmark featured in the silver screen to popular songs is the prestigious international icon of New York City. A reason why we are probably most familiar with this particular skyscraper. Located at the heart of Manhattan, the west side of Fifth Avenue, the multi-colored tower lights of the Empire State Building take the lead in decorating the city’s night skyline. Originally built as a symbol of hope during the nation struggling through the Great Depression, this famed landmark has been recorded as the tallest building in the world for 40 years in between 1931 to 1971 with its magnificent 102-story status and height reaching up to 1,454 feet (443.2 m) including its antenna.

All the while it had exceeded the height of the tallest skyscraper in the vicinity, the Chrysler Building, by as much as 204 feet. It took a tremendous amount of manpower of 3,000 workers to complete the construction in record time—as short as 13 months. The Empire State Building set the record as the tallest skyscraper in the world, a title retained until the completion of the World Trade Center in 1972.

Visitors to the 360-degree open-air observation deck on 86th and 102nd floor observatory attracts around 4 million visitors where expansive sunrise and night view of the entire city and beyond is visible, overlooking the Central Park, Hudson River, and Statue of Liberty.

Designed to withstand the building’s heavy gravitational pull and strong winds, the structural frame of the building took 57,000 tons of steel columns and beams that formed a 3-D grid throughout.

Dubai’s Burj Khalifa, the Mega Tower Overlooking the Earth

Located in the exuberant city of Dubai, this thin, needle-shaped skyscraper is gaining more and more prestige each year as millions of visitors marvel at its glamorous status of 829.8 meters (2,722 feet). This $1.5 billion-worth super scraper is currently the tallest architecture in the world since its construction in 2009. Taking five years to complete, more than 12,000 workers took part in the process for what is twice the height of Empire State Building and three times that of the Eiffel Tower in Paris.

This superstructure taking center stage in the scenes of “Mission Impossible: Ghost Protocol”(2011) where Tom Cruise pulls an edgy stunt scene moving about the walls of the building with suction gloves, gaining further worldwide stardom.

The city’s breathtaking skyline is observed  from “At the Top” deck on the 124th floor where the neighboring country, Iran’s shores can be seen during days of high visibility. In the making of this magnificent structure, 31,400 metric tons of steel rebar was used.

Lotte World Tower, Guaranteed Security among the Clouds

POSCO provided 41,000 ton-worth of high-strength steel for the construction of Lotte World Tower(Source: Tourmate)

Soaring 555 meters into the clouds, Lotte World Tower situated in Jamsil, Seoul, is the fifth tallest skyscraper built incorporating the newest cutting-edge technology. It is the home to world’s highest glass-floored observation deck creating a thrilling sensation of vertigo on the 117th to 118th floor. The observation deck reveals Seoul’s mountainous landscape afar during the day.

Leading edge construction technology from around the world was integrated into the process, and POSCO’s exclusive technology played a considerable part in the project. Thick plates (usually over 100 mm) applied in the domestic market was no more than 80 mm. However, to construct the highest building in the domestic scene, POSCO supplied 41,000 ton-worth of 120 mm thick plates and HSA800 high-strength steel. HSA800 is POSCO’s world premium product of which is highly suitable as the construction material for high-rise buildings. Even a 1mm² amount of HSA800 could support a human being weighing 80 kg (176 lb) without trouble.

Shanghai Tower, the World’s Greenest Skyscraper

Shanghai Building is spotlighted as a sustainable mega-tall tower(Source: Asiantowers)

China’s tallest, and the second tallest in the world, the Shanghai Tower is one of the recent high-rise construction recognized for its efforts in sustainable architecture. Towering 632 meters high, this China’s newest architectural invention prides on the world’s fastest elevators, highest hotel, and restaurants, as well as the tallest observation deck.

By reducing the amount of construction material needed by 25 percent, it saved approximately $58 million in construction costs. It collects rainwater and reduces wastewater for energy conservation while combining the cooling and heating power system that cuts tons from carbon footprint. Furthermore, the engineers installed 200 wind turbines at the top of the power which generates about 10 percent of the building’s electricity.

Quintessential Steel in High-rise Buildings

Use of steel delivers a range of advantages aside from stability. High-tech steel used for construction enables thinner walls making for more spacious interiors and more windows. The most crucial element is the safety aspect which steel delivers. Natural disasters pose a great threat to tall buildings from typhoons to fire hazards. As the quality of steel high-strength steel used in the construction of mega buildings is high, the resilience and ductility provide a significant advantage.

POSCO’s exclusive technology, HAS high-strength steel is an example of a material that is resistant to earthquakes. It is 1.7 times stronger than regular steel while 30 percent lighter in weight. A perfect high-strength steel that absorbs strong vibration.

In Japan, the country often hit by earthquakes, high strength steel is highly preferable for good welding and economic value. Up to 880 N/mm² in yield strength (tensile strength 1,000 N/mm²) is highly preferred.

The tense competition for reaching new heights in mega-tall buildings are still underway. Saudi Arabia’s Jeddah Tower will soon become the tallest in ranking, setting aside Burj Khalifa. Its expected height reaches above 1,000 meters, and Dubai’s Creek Tower is expected to be completed in 2021 as an observation tower rising up at 1,300 meters. With the advent of Jeddah Tower towering above 1 km, an even newer era of skyscrapers will begin where steel frames will play an even more significant part of the future’s architecture—raising efficiency in limited city spaces while creating installation artwork befitting in the creation of the Megacity.

Having discovered the architectural wonders of the world that have reached new heights through the application of steel, a tour to any of the tall buildings may now hold new meaning. Cheers to the pinnacle of human design.

Steel and Skyscrapers: A Brief History

The history of skyscrapers dates back to the second half of the 19th century when steel became a cornerstone of the world’s industrial economy. Steel framing and steel reinforced concrete made “curtain-wall” architecture possible, which led to the world’s first skyscrapers. Steel further evolved the capabilities of skyscrapers, allowing them to reach new heights. From the humble beginnings of the first skyscraper, the Home Insurance Building, built in Chicago in 1895 and standing 42m, skyscrapers now reach extraordinary heights.

Here are the four tallest skyscrapers in four of the regions of the world today. 

Burj Khalifa, Dubai, Middle East

Rising to 829.8m over the gulf city of Dubai, the Burj Khalifa is the tallest building in the world. Designed by Skidmore Owings and Merill (SOM), the Burj Khalifa used a bundled tube design and a composite of steel and concrete to reach its record height. The Burj Khalifa employed a bundled tube system which is a system of construction that uses an interconnected frame of steel tubes. Thirty-nine thousand tons of steel rebar was needed for the construction. The Burj Khalifa houses a mix of residential, corporate and retail space.

Shanghai Tower, Shanghai, Asia

Standing 632m, the 128-story Shanghai Tower is located in Shanghai’s financial district of Lujiazui, Pudong in China. Though currently still under construction, following its topping out in 2013, the Shanghai Tower is the tallest building in China and the second-tallest building in the world, surpassed only by the Burj Khalifa in Dubai. The Shanghai Tower is the tallest of a group of three adjacent supertall buildings in Pudong and is composed of three important design strategies, the asymmetry of the tower’s shape, its tapering profile and its rounded corners, all of which will allow it to withstand typhoon wind forces common in Shanghai. 

One World Trade Center, New York, North America

Designed by the same firm that designed the Burj Khalifa, the 104-story One World Trade Center reaches a height of 417m. Including the spire, its total height is 541m (1,776 ft.), a tribute to 1776, the year the U.S. won its independence. Surpassing the Willis Tower (formerly Sear’s Tower) in Chicago, the One World Trade Center is the tallest building in the U.S. The tower’s structure is designed around a strong, but lightweight, steel frame made of beams and columns. The lighter structures enabled savings in greenhouse gases and a 30 percent decrease in carbon emissions during construction. There are 70 elevators and nine escalators in the One World Trade Center. (Image: http://bit.ly/1DsqmBK)

The Shard, London, European Union

The Shard is a 72-story glass pyramid tower, rising above the city of London. It was completed in 2012, and stands 245m. The design uses an intelligent combination of steel and concrete. Steel structures were used from the ground floor to the 40th floor. From there to the 69th floor, concrete replaces the framing material, before the design reverts back to steel. Construction required 12,000 tons of steel.

As the world continues to grow and urbanize the ability to adapt building structures and materials will continue to evolve. Steel will continue to be essential in helping the world’s buildings reach new heights.

The infographic below shows how each of these four gravity-defying structures compare. See how each stack up in height and the amount of steel necessary to make each possible. (Image: http://bit.ly/1eUAFTc)

The images that cross your mind may seem apocalyptic, or even impossible to fathom. There is barely a part of our lives today that is not influenced by the metal, and it is not an exaggeration to say that steel is perhaps the most significant component of the modern world. Without it, civilization as we know it would cease to exist. Let’s take a look at a few ways the world would be a different place without steel.

Skylines would be incredibly boring.

Structures such as skyscrapers and towers would be inconceivable without steel supports and cables. Therefore, buildings would be low-rise at their tallest, making densely populated cities devastatingly uncomfortable. It’s hard to imagine a world without the likes of the Burj Khalifa, the Eiffel Tower or the Empire State Building, all of which utilize steel as a main construction component.

We’d have very few options for dinner.

The food we eat today has been refined in factories with steel tools, processed with steel equipment, baked in steel ovens and preserved in steel cans. It is delivered to us via steel trains on steel rails, or by steel trucks over steel-reinforced roads. As such, in a world without steel, our food sources would be limited to what could be cultivated locally and the possibility of faminewould be persistent.

Getting in touch would take for-ev-er.

(Image source: http://bit.ly/1dgLFuc)

Without steel to manufacture telephones, computers or even mail trucks, we would be stuck relying on less than efficient carrier pigeons (which were actually a thing a few thousandyears ago) or the pony express. So much for instant connection.

Reading material would be extremely limited.

(Image source: http://bit.ly/1tNFW6q)

Newspapers, magazines and books we read today are mostly printed on a steel press. Even the paper is made from wood which is cut with steel implements and processed in steel machines. Mind you, there wouldn’t be any steel-plated pens, either, so quills would be used to write and copy the material. Of course, there might be bronze movable type printing, but it would still take a very long time and amount of patience to carry out.

Disease would run rampant.

Stainless steel has contributed greatly to improved sanitation in hospitals, restaurants and other public environments, and has helped to save the lives of millions. Easy to clean, it is more hygienic, impervious to corrosion and scratch-resistant, and is capable of standing up to harsh sterilizers, heat and heavy use, preventing deadly bacteria from surviving on its surface. Without it, the constant threat of diseases such as Ebola and measles would be very real.

Unemployment would rise and the economy would crumble.

Crude steel production reached 1.66 billion tons worldwide in 2014 which only says one thing about our world… it’s growing. It’s estimated that more than 95 countries are producing steel today, with more than two million employees worldwide, and a further two million contractors and four million people in supporting fields. Without this vital industry, the world economy would suffer and many people would be without jobs.

A glimpse into the world of steel

Fortunately, we do live in a modern world where steel does exist and its importance is clear. Yet few people tend to notice it, or understand how it works. Which is why TenarisUniversity, in conjunction with the World Steel Association’s steeluniversity, has launched the massive open online course (MOOC), “Introduction to Steel.”

This lively online learning program will feature the basics of steel melting, steel’s historical and cultural context, its relationship with society and the sustainability of a world supported by steel by utilizing everyday examples, demonstrations and film footage of steel making. Additionally, it will encourage community interactions between students and the professor.

“We believe in the highest standards of education to develop people all around the world,” Rolando Lange, Director of TenarisUniversity noted. “With this MOOC, we hope students will get passionate about steel as a material and learn about the critical role it plays in our society.”

Comprised of a four-hour framework, the course is open to all free of charge. It starts on June 2 and will run for two weeks. Registration is now open. Click here to enroll in the class, or for more information.

The mere mention of the city conjures up images such as towering skyscrapers, luxury hotels and mysterious desert dunes.

But compared to its neighboring emirates, this “Miracle in the Desert” has very few gas reserves. As such, Dubai began preparing for the post-oil era long before its onset. The large increases in oil prices after the Gulf War of 1990 encouraged the city to focus its efforts primarily on free trade and has since transformed into a global hub for trade and logistics.

Now, countries throughout the Middle East are looking to Dubai, which is considered the world’s most strikingly modern and prosperous city, as a model of success.

Seeing the potential of the region, POSCO opened its first office in the Middle East in Beirut, Lebanon, in 1975. Later, in 1998, the steel company opened the Dubai presence of its Singapore office, which was promoted as the Dubai office in 2006.

Currently, there are four employees working at this location who oversee POSCO activities in 19 countries: 14 in the Middle East and 5 in North Africa.

In response to changing marketing conditions, the Dubai office is working to increase the sales of products by focusing on reinforcing its solution-based marketing capabilities. It is also working hard to promote POSCO’s innovative solutions to its clients ordering construction projects, and is seeking to create new business opportunities with other Middle Eastern offices of POSCO affiliates.

To get an idea of where the future of POSCO is headed in terms of construction, it only makes sense to take a look at some of Dubai’s most impressive architectural projects of the past which used steel as a construction material. Here are three of them:

Burj Khalifa

Also known as the “Jewel of Dubai”, this 164-story building is the tallest free-standing structure in the world. The building took about five and a half years to build, and used over 31,400 metric tons of steel rebar. Laid end to end, this would stretch over a quarter of the way around the world!

The Burj Khalifa has since become a symbol of the wealth and progress embodied by the Persian Gulf city and currently houses a mix of residential spaces, corporate suites and the Armani Hotel Dubai, the world’s first hotel designed and developed by Giorgio Armani himself.

Princess Tower

(Image courtesy of Wikipedia)

Also a record-breaker, the Princess Tower is the world’s tallest residential tower at 414 meters and 107 floors. The building boasts 763 luxury apartments, including a number of penthouse apartments overlooking the Palm Jumeirah, a dramatic artificial archipelago that resembles a palm tree.

Yet the most impressive aspect of the Princess Tower is its grandiose exterior, which includes a decorative dome that sits atop the building like a giant crown. The dome, which was finished in February 2012, has a mast on the top of it, which weighs 110 tons and is made of aluminum and steel.

O-14

(Image courtesy of Archdaily)

O-14’s façade is an inventive merger of structure and solar shading that is based on a perforated exoskeleton that challenges the concept of an office building altogether. The 1,300 openings in the tower’s shell create a sensational show of natural light that allows for a unique and ever-changing interior space, and permits cool air to filter through the building, thus saving energy.

The outer concrete and steel skin of O-14 also play a fundamental role in supporting the inner tower with an array of linking beams. Eliminating the need of interior columns creates more floor space, and as such, more areas for rent.

Considering the fact that Dubai is seemingly always under construction, and in constant pursuit of breaking even more world records, it’s certain that the demand for steel and POSCO’s services will continue to increase.