Construction

POSCO delivers not only the high quality, high strength steel used in skyscrapers but also a
wide range of solutions for optimal construction including welding, design and performance testing, writing a new chapter for the erection of high rise buildings.

For the construction industry, POSCO is a dependable supplier of structural steel and highly functional finishing materials featuring diverse designs and good performance. Our products for civil engineering are extensively used for large scale suspension bridges and girder bridges.

Interior and Exterior

It is the major finishing material determining the interior and exterior of a building by using steel with various patterns and colors, and the panel that provides a safe and sound environment through insulation and fire resistance securement. This steel features a lower vulnerability to rust under the atmospheric influence and a good resistance to corrosion. The internal and external steels are less rusty and corrosion resistant in the atmosphere than the general steels, and weather resistance steels, PosMAC or stainless steels are applied.

Related Products
Weather Resistance Steel(HR) Weather Resistance Steel(Steel Plate) GI/GI(H) PosMAC Pos Treatment Steel Austenitic Series(300 Series) Ferritic Series(400 Series)

Construction Application Technology

[INNOVILT Fantasia] #1 The New Library of SNU, Kwanjeong Is Shining with Steel

▲ Source: Seoul National University Library Kwanjeong White Paper (2016)The main building of the Central Library, located in the heart of Seoul National University (SNU) Gwanak campus, was completed in 1975 with the design from Seung-woo Lee. Built to reflect modernism, which was at its height at the time, the building has been well used for over 40 years without much change. It is not necessary to give many titles such as “The best” or “Having the largest number of books” to SNU’s library since it is a significant place with history, where countless students have passed. However, as times changed, more was expected from the library, and the need for expansion became apparent. Bookshelves were lacking space, and the reading rooms were also becoming too small to provide for all the flooding students. So, in 2013, SNU decided to construct “Kwanjeong Building” as an extension building of the central library.▲ Source: Seoul National University Library Kwanjeong White Paper (2016)

A Large Open Indoor Space

SNU Library Kwanjeong faced some challenges in its construction — like in all other buildings — since it had to meet the following conditions: 1. The Kwanjeong Building had to be directly connected to the main building, and 2. the central stairway between the library and the student center, and the pathway to the east of the library had to be preserved in its original state. To achieve this task, SNU had no choice but to select the narrow piece of land between the Central Library and the College of Pharmacy as the construction site for the expansion. Instead of initiating the original plan, which was to build the library higher, an L-shaped design plan was selected, covering the right-hand side and upper part of the Central Library. This was a measure to secure the scenic view that stands behind the library as well as to keep with the height restrictions of Gwanaksan Mountain. The construction method adopted here leaves a gap between the main building’s rooftop and the Kwanjeong Building, giving it an illusion — as if a new floor was added to the main building.The Kwanjeong Building took a horizontally long-form, reaching 165 meters to secure maximum interior space. The floor plan of the sixth, seventh and eighth floors, shows that there aren’t any columns or walls passing through the middle, other than the pillar located near the elevator. The sixth floor consists of a multimedia plaza and a computer lab, and reading rooms are located on the seventh and eighth floor, so these three floors are where many students are likely to use at all times. Since there aren’t any columns here, the students can feel much comfortable and a sense of openness as well. A truss — weaving linear frameworks into triangular nets to withstand heavy weight — structure reaching 112.5 meters wide is supported by the two core mega columns standing at both ends of the building. In reality, using a long span truss structure in a large scale building is quite rare. The key to realizing this structure is POSCO’s high performance construction steel called HSA 650(High-performance Steel for Architecture 650). With a yield strength of 650 MPa and tensile strength of 800 MPa, HSA650 is capable of supporting a weight of 80 kg per 1㎟. Simply put, the SNU Library Kwanjeong is an architecture where excellent materials meet construction techniques.▲ The outer wall of Kwanjeong was made with a trapezoidal module curtain wall. For the purpose, the Steel Curtain Wall was selected, since it enables atypical designs and shows higher structural performance compared to other materials.

A Facade Filled with the Lights of the Mountains and Sky

Besides its structural merits, Kwanjeong Building catches the eye with its shining exterior. Tae-Yong Yoo, the architect in charge of the project, mentioned that the concept of the design was about “light” — something that has been and will be existing in the future as well. He said, “I started designing by setting a small architectural element that projects light. And this element was repeated to make up a whole.” His intentions are well displayed on the building facade, the exterior of the building. The exterior wall was built by applying the steel curtain wall and anodizing panels — a plated panel with a film that is produced while oxidizing aluminum surface — in a repetitive manner. These panels were tilted to 16 degrees considering that they highly reflect the strong summer sun. So this exterior wall is capable of reflecting and letting in sunlight at the same time.

[Architect’s Pick : INNOVILT Steel Curtain Wall]

Curtain walls aren’t new to modern architecture. However, due to structural issues, they need to be used carefully in the case of high buildings like Kwanjeong (4.5 meters). Especially if the exterior wall is to show an atypical design, a curtain wall made of steel would be most appropriate choice. In the case of Kwanjeong, the frames of the curtain wall that hold the glass and anodizing panels are slim and neat-looking. This is possible because they are INNOVILT Steel Curtain Wall made with POSCO’s World Top Premium Product, ‘PosMAC’. PosMAC is a ternary alloy coated steel composed of zinc, magnesium, and aluminum. When exposed, the coating forms a highly stable and dense film layer called “Simonkolleite.” This enables the product to demonstrate an extra protective layer — a ternary alloy layer whose density is much higher than that of conventional galvanized steel sheet. PosMAC is 10 times more corrosion-resistant than conventional steel.The facade was made to reflect the sunlight from early morning till sunset, and relieve the heaviness it might impose on the overall landscape. The spacious indoor area with cores on each side, and the harmony of glass and anodizing displayed on the exterior with a slim well-finished frame might be considered as key features of SNU Library Kwanjeong. And INNOVILT Steel Curtain Wall plays a hidden role behind the scenes here.PrevNext Curtain WallHSA650INNOVILTINNOVILT FANTASIAKwanjeong LibrarySeoul National UniversitySNUSNU LibrarySteel Curtain Wallsteel products for construction
[INNOVILT Fantasia] #1 The New Library of SNU, Kwanjeong Is Shining with Steel
[You Know What?] POSCO Steel Bridging Places Around the Globe
One common problem famous cities around the world face would be ‘traffic.’ So most cities are busy building tunnels, bridges, and expanding highways to resolve this issue. Australia’s Melbourne is also known for its heavy traffic. According to INRIX, a US traffic information analyst, Melbourne ranked 17th among the world’s most congested cities in 2018.▲ Aerial view of WEST GATE TUNNEL, Melbourne, Australia. Nine bridges that connect each section of the city will be newly constructed.(Image source: WEST GATE TUNNEL website)That’s why the WEST GATE TUNNEL project started. Previously, for a single day, 200,000 cars had to rely solely on the WEST GATE Bridge to enter the city center from Melbourne’s harbor. The new project is a large-scale infrastructure project that builds nine new bridges and one twin tunnel to solve this problem. It runs about 5 km from Melbourne to Docklands, with construction in progress beginning in 2018 and estimated to be completed by 2022.Not many people would know that the company behind connecting the bridges of Australia is a Korean company from more than 8,000km away.

l Melbourne’s Bridge Created With Korean Steel!

POSCO is one of the top three domestic companies in annual sales (FY2018). It is not only a Top Player in the domestic market but also a Global Player that exports about 45% of its total sales. POSCO provides all the steel plates for the nine bridges of the WEST GATE TUNNEL project. Of course, winning this project demanded intense work from POSCO’s marketing, production, quality, and research institutes.First of all, POSCO presented an idea of applying steel products with higher quality and lower cost than the previously requested steel specifications the client. At the same time, POSCO took the lead in bidding with high specs steel that can’t be easily produced by competitors.POSCO overseas subsidiaries also joined in. POSCO-China took a three to four-hour trip every week to persuade Zhenhua Port Machinery Company Limited (ZPMC). ZPMC is the bridge construction company for this project. To reduce the cost of loading and unloading, POSCO-China suggested utilizing ZPSS’s Zhangjiagang Pier. ZPSS is POSCO’s stainless steel manufacturing subsidiary in China.At the same time, Pohang Works entered into a “joint operation” to get the ACRS review done within a short time. On the day of the on-site evaluation, all relevant departments cooperated with a 24-hour response system.Eventually, POSCO was chosen as the supplier of the entire steel plates for the bridges of the WEST GATE TUNNEL project. Steel supply began in July last year and ends in May this year. The WEST GATE TUNNEL project will be a solution to alleviate the troublesome traffic congestions in downtown Melbourne. In addition, almost nine hectares of new open space will be created, with over 14 km of new and upgraded walking and cycling paths. This project is aiming to improve the quality of life for Melbourne citizens — it isn’t just a tunnel and bridge construction project.<span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span><span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span><span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"><span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start">?</span></span>

l The Longest Suspension Bridge in the World — ‘ALL POSCO STEEL’

POSCO is also a part of the suspension bridges that cuts through straits. Even on the current longest suspension bridge in the world.The Çanakkale 1915 Bridge is being built in the city of Çanakkale, northwestern Turkey. It is expected to become the longest suspension bridge in the world with a total length of 3,563m and main span distance of 2,023m. In the past, people had to take a boat that came every 30 minutes or so to cross the strait. However, with the bridge completed, it is expected to be a 10-minute drive to reach the other side.The construction will be finalized by 2023 to celebrate the 100th anniversary of the Republic of Turkey — However, the Turkish Parliament Chairman said it could be completed in 2022, one year ahead of the original plan! The scale for the construction is immense for a single project with a budget of 3 billion dollars, and 128,000 tonnes of steel products. It’s no wonder that leading companies around the globe worked hard to win the contract.▲ Aerial view of the Çanakkale 1915 Bridge, Turkey. The red tower symbolizes the Turkish flag color. The height of the tower reaches 318m. (Image source: KSCE Journal of Civil Engineering, January 2020)POSCO was the winner of the intense competition. POSCO succeeded in winning all orders for steel plates and wire rods for the bridge. POSCO’s marketing representative attributed the success to three factors — premium steel supply, solutions to better process steel, and service to ensure perfect quality from production to transportation and storage.Generally, for a bridge construction project, the construction company, manufacturer, and the steel supplier are determined after the design is completed — like the Australian WEST GATE TUNNEL project mentioned above. However, the case was different for the Çanakkale 1915 Bridge. It was a “Design-Build*” project, meaning that the design and construction were carried out simultaneously. In other words, this project needed a solution for the steel application from the initial design stage. The competition wasn’t about just the price, and non-price competitiveness was the secret. This was, of course, one of POSCO’s strengths.*A business model in which the architect-contractor cooperates from the design stage before the design is completed. This is different from the general method where construction is progressed after the design is completed.POSCO actively held solution briefing sessions for local contractors. The key to winning the project was to quickly dig in from the design stage, which was crucial in a “Design-Build” project. POSCO promised the production of wide-ranging materials to minimize local processing costs, welding solutions for steel plates over 100mm thick, and steel storage and inventory management services utilizing POSCO-Turkey Nilufer Processing Center (POSCO-TNPC), an automotive steel processing center in Turkey. Initially, POSCO received an order of 35,000 tons of steel plates for the bridge towers. This later on advanced to a contract of 52,000 tons of steel plates for the decks and 41,000 tons of wire rods — resulting in a build of an ‘All POSCO STEEL’ bridge with a total 128,000 tons of steel.POSCO’s steel supply for the Çanakkale 1915 Bridge is now nearing its end. It will be finished by April this year. Since its start in 2018, the journey for the project lasted for nearly three years — including the preparation period. However, this is not the end since POSCO’s after-sales service will continue even after the steel supply is complete.POSCO’s Sang-Il Lee of the Construction Steel Materials Marketing Office, who participated in this project said, “This was a large project that I would never have been able to handle alone. We could win this contract thanks to the many employees who joined and came together. I’m glad to see that POSCO enhanced its status as a global player with this project. I would love to visit and see with my eyes once the Çanakkale 1915 Bridge is complete.”Bridges could be considered one of the pinnacles of modern civilization. Looking at a far stretched bridge might make one marvel, “Wow, how did people build that? Human technology is amazing.” The ‘people’ who make this amazing structure isn’t far away. Even today, the bridges connecting the world are supported by POSCO’s steel. Çanakkale 1915 bridgeMelbourneTurkeyWEST GATE TUNNELYou Know What?
[You Know What?] POSCO Steel Bridging Places Around the Globe
POSCO’s PosMAC Barrier Saves the Trees
In the middle of a bleak city street, trees deliver a fresh breather for the pedestrians. These street trees are typically managed by the local governments as part of the “Urban Forest Landscape” project under the auspices of the Korea Forest Service. Not only do they create a pleasant ambiance for pedestrians, but they also provide many practical benefits, such as absorbing fine dust and mitigating urban heat island effect.Around these roadside trees, however, sidewalk blocks are often found to be misplaced or even broken. The recent typhoon Lingling turned so many street trees in Korea, upside down inside out. Korea’s epic poem Yongbieocheonga features trees with deep roots that never sway, even in the face of the strongest winds. But outside the poem, keeping the trees steady and strong requires an actual solution. In POSCO’s partnership with its customer, MYSTECH Co., LTD., there might be an answer the industry has been looking for. Meet PosMAC Barrier, the result two companies’ latest collaboration, at POSCO Newsroom.▲ The aftermath of the recent typhoon Lingling

l Water Supply: the Key to Urban Forest Maintenance

From 1988, Korea carried out extensive afforestation policy, especially for roadside trees — and since 2000, the country has been planting 600,000 roadside trees every year, accelerating the progress of the country’s urban forest landscape project. However, planting trees is one thing, maintaining is another. In 2017, Korea Land & Housing Corporation released a new study on the reasons behind roadside trees defect in Gyeonggi Province. The study revealed over 35% of trees defects were due to water shortage.Underground water shortage causes abnormal growth in roots as they outstretch themselves for an alternative water source. These roots soar above the ground, breaking down the sidewalk blocks. Or, these roots overgrow underground, making the ground uneven.With sufficient water supply, a tree grows countless fine roots. These fine roots firmly ground the tree. Otherwise, a tree solely relies on the main root with no firm grip. A strong typhoon like Lingling could topple over such trees.When tree roots are not kept under control, they can damage underground utilities like sewer pipes. Worse, it could cause dangerous sinkholes. Maintaining roadside trees require a huge financial commitment in the form of taxes — proper water supply can help deal with many problems in maintaining roadside trees.

l PosMAC Barrier, a Sustainable Solution Recycles Rainwater

So, how to keep the trees hydrated? POSCO, together with its client company MYSTECH CO., LTD., is providing an innovative solution with the PosMAC Barrier, a tree barrier made of POSCO’s high-strength and corrosion-resistant PosMAC. PosMAC Barrier protects rainwater storage and water tank.PrevNextUnder the leadership of CEO Jin-Hwan Kim, MYSTECH CO., LTD. was founded in 2002. The company produces specialized products for roadside facilities such as sewer covers and protection plates for trees. POSCO’s relationship with the company dates back to 15 years ago when the two companies’ R&D endeavors led to the creation of sewer coverage that prevents odor — across the globe, the first of its kind. After the years of focused work on developing an eco-friendly technology for tree growth, MYSTECH reached out to POSCO in 2017.POSCO’s collaboration in MYSTECH’s research can be attributed to the high bar set for the material. Since MYSTECH’s rainwater storage tank stays underground, it must withstand the underground pressure and resist corrosion. An ordinary steel plate would require much thicker coating, making it difficult to manufacture. Stainless steel could have been the alternative material if it weren’t for its high cost.Enter PosMAC, rust-free and one of POSCO’s WTP (World Top Premium) products which provided just the right solution for MYSTECH’s dilemma.*PosMAC: POSCO Magnesium Aluminum Alloy CoatingPosMAC is a ternary alloy coated steel composed of zinc, magnesium, and aluminum. When exposed, the coating forms a highly stable and dense film layer called “Simonkolleite.” This means the product creates an extra protective layer, a ternary alloy layer whose density much higher than that of conventional galvanized steel sheet. PosMAC is 10 times more corrosion-resistant than conventional steel.The high-strength PosMAC’s tensile strength is 400Mpa or up. Because of this, PosMAC can hold rainwater for a long time even in the corrosive environment such as soil or chloride-rich roads. It is also strong enough to withstand root pressure. To ensure optimal design and development of the product, POSCO provided full support to the R&D endeavor by forming a research team with MYSTECH and the RIST (Research Institute of Industrial Science and Technology).Gwang-Ho Ko of POSCO Construction Steel Solution Group summarized the strength of the PosMAC Barrier: “It is a strong and eco-friendly steel product that addresses the fundamentals of urban forestation. The Barrier controls the uplifting of tree roots and recycles stored rainwater to provide water to the roots when needed.

l Two Years of Testing Proves, “PosMAC Barrier Saves Trees”

Above the ground, the only visible part of the PosMAC is its main body and the cover, but underneath the ground, there is a water tank.When it rains, rain accumulates in the tank, and a water discharge pipe located towards the direction of root discharges rainwater, providing much-needed water to the roots during the periods of water shortage. The filter located in the upper body guards off foreign substances, and a water inlet allows in additional water supply when necessary. The water tank can hold 45 liters of water per unit and can be selectively installed from one side to four sides. One set of the water tank can hold up to 180 liters of water.이전다음POSCO and MYSTECH completed the commercialization and the patent registration (patent 10-2108-0162207) for PosMAC Barrier. Over the past two years, the product received rigorous testings to help verify how much it contributes to tree growth. PosMAC was installed for the tree on the verge of perishing, and the trees with too many roots also received the Barrier treatment.The result was incredible. After two years of installation, it was clear PosMAC Barrier made huge difference. PosMAC Barrier even revived dying trees, sprouting green leaves shortly after the installation.PrevNext

l PosMAC Barriers to Go Nationwide

Last April, a policy seminar at Korea’s National Assembly introduced PosMAC Barrier as an ideal steel solution to address climate change. The seminar generated momentum in raising awareness on how water shortage could trigger damages to urban forestation. It also created opportunities for PosMAC Barriers — numerous local governments are turning to the product as a solution to deal with damaged roadside trees.Since then, the PosMAC Barrier has been installed for 255 trees across Korea. POSCO and MYSTECH are currently conducting pilot projects in collaboration with Seoul, Jeonju, Suwon and Korea Forest Service. Local governments are currently undertaking urban forestation projects and POSCO is proactively supporting its client companies to meet the growing demands across the country.A local government official said, “Conventional tree barriers merely set boundaries for the tree protecting them from the footsteps of pedestrians or vice versa. As the need for proper management and tree growth escalate, we’re realizing that PosMAC Barrier is providing an excellent solution.”He added, “Urban forestation can truly benefit from this kind of innovative brand-new technologies. Not only does PosMAC provide sufficient hydration to the trees, but it’s also extremely cost-efficient. Compared to conventional tree barriers, the cost difference is minimal.”In collaboration with MYSTECH, POSCO is putting forward eco-friendly marketing to expand the application of POSCO’s LID (Low Impact Development) steel products. As part of the plan, the company is carrying out a marketing strategy to install POSCO Barrier in the landscaping businesses of large construction companies as well as for public roadsides facilities.MYSTECH CEO Jin-Hwan Kim said, “The roots of roadside trees trapped underneath concrete pavement suffocate and perish. Every year, precious resources are being wasted just to remove these dead roots.”He continued, “Time and again, our collaborative research demonstrated that PosMAC provides a nip-it-in-the-bud solution to this problem. Now, it is time for us to see beyond the domestic market and head to the global stage. We are set to establish PosMAC as the go-to steel product when it comes to environmental sustainability.Right next to POSCO Center at the heart of Seoul’s Gangnam district, PosMAC is protecting trees. With deep faith and confidence in the product, the company installed PosMAC for dying trees. Needless to say, PosMAC saved the dying trees! Roadside trees are essential elements of urban living. Unlike other urban facilities, it breathes and brings life to cities, so it requires more sustainable and long-term management. PosMAC Barrier, POSCO’s sustainable steel solution, is bringing life and vitality to roadside trees and thus, urban life. MYSTECHPosMACPosMAC BarrierSteelSaveEarthTree barriers
POSCO’s PosMAC Barrier Saves the Trees
POSCO C&C’s New Color Steel to Take on Fire
In 2010, a mass fire burns in Busan multi-purpose building triggered an alarm for Korean authorities. What started as a tiny spark on the fourth floor spread all the way to the 38th-floor rooftop in less than 30 minutes. Flammable exterior wall panels were to blame for the quick spread.After the Busan fire, Korean government banned combustible finishing materials for buildings over 30 stories (120m) to prevent similar mass fires. Despite the new legislation, mass fires continued — even in smaller buildings.After the devastating hospital fire in Miryang last year, the government is now set to enact new legislation mandating non-combustible finish materials for buildings over 3 stories. For the construction industry, the new law is practically a ban on all combustible materials.Now, POSCO C&C is addressing the industry and the government concerns with a new innovative product: a non-flammable color steel sheet. POSCO Newsroom reports. 

l Hardly Burns, Hardly Fumes

On July 5, POSCO C&C(POSCO Coated & Color Steel Co., Ltd), unveiled the company’s non-combustible color steel for the first time.Most fire casualties occur when victims inhale smoke or toxic gases – which is what POSCO C&C tried to address when they developed the new non-combustible steel. How did the company develop a new building material that hardly burns and hardly fumes?(1) KS F ISO: Non-combustibility TestPOSCO C&C primarily focused on developing a product that meets the KS F ISO criteria, set by the Korea Conformity Laboratories (KCL).The non-combustibility test measures the burning behavior of a material. Test material is placed into a furnace. The furnace heats the material at 750°C for 20 minutes. The maximum and equilibrium temperatures are measured, as well as the mass reduction of the material.To meet the KCL standards, the difference between the maximum temperature and the equilibrium temperature should remain below 20°C — and the mass reduction should be 30% or less.▲ Non-combustibility test conducted by POSCO C&C. The test materials are heated at 750°C for 20 minutes — then the maximum temperature, equilibrium temperature, and mass loss rate are measured. (Image source: POSCO C&C)Normally, when a test material catches fire, the temperature rises quickly — by over 20℃. For conventional color steel plates, the temperature increase is around 80 ~ 100 ℃. As for POSCO C&C’s non-combustible color steel, the temperature difference between the maximum and the equilibrium levels is within 20°C.When a material burns, a certain level of mass reduction is expected — the volume reduction signifies the amount of materials burnt. As for color steel, most weight of its weight comes from the steel portion. This means color steel retains most of its mass even in the event of a fire.<Non-combustibility Test: Criteria>(2) KS F 2271: Toxic-gas TestThe second criterion POSCO C&C strived to meet was the toxic gas test, KS F 2271. In this test, eight laboratory rats were put in a rotating wheel measuring how long they can rotate until they stopped — this time is defined as ‘action stop time.’The running rats were exposed to the fumes produced by the POSCO C&C non-combustible color steel. KS F 2271 requires the action stop time to be longer than 9 minutes — which means the rats must continue to move at least for 9 minutes.The KS F 2271 assesses the toxicity of gases generated by test materials predicting the required time for evacuation. The non-combustible color steel produced by POSCO C&C satisfied the 9-minute requirement set by the KS F 2271 thereby proving its suitability in securing evacuation time by minimizing the amount of toxic gases during a fire. 

l POSCO C&C’s Non-combustible Color Steel vs Conventional Color Steel

<Non-combustible vs Conventional Color Steel>As for the corrosion resistance and water tolerance, the POSCO C&C non-combustible color steel was on par with the Polyglycerol Sebacate (PGS), conventional building materials.With the hardness level of H, non-combustible color steel was more solid than PGS, whose level was at H. Ultimately the result means that non-combustible color steel is more resistant to scratches.As for the thickness level, the situation is slightly complicated. POSCO C&C representative Tae-Yol Park says, “If we solely focus on producing non-combustible steel, thin steel sheets are better. But what we’re trying to produce non-combustible color steel, without compensating the qualities the conventional color steel offered — in terms of color variations, durability, etc. in which cases it’s actually better to have thicker steel sheets.”In this aspect, POSCO C&C was able to boost the thickness of its non-combustible color steel, while retaining the key qualities for the conventional color steel. The company’s R&D effort to boost the thickness even more is ongoing.In addition to the non-combustibility test (KS F ISO) and the toxic-gas test (KS F 2271), POSCO C&C administered an internal test, a torch heating test. Both the conventional PGS and the new non-combustible color sheet were put through the testing.When torched, PGS left a clear pattern, whereas non-combustible left relatively blurry patterns. According to Park’s explanation, clear patterns mean the material burnt more.Park also noted that the non-combustible color steel produced far fewer fumes than the PGS. Albeit a simple comparative experiment, the low fume generation signifies that POSCO C&C’s new product is less likely to generate toxic fumes — which will help to secure more visibility and evacuation time in case of a fire emergency.

l POSCO’s Non-combustible Color Steel, What’s Next?

Color steel sheet is used as building exterior materials, so safety is the top priority. However, the aesthetic element is also crucial. Currently, non-combustible color steel plates are available in various tones of the following three colors: beige, grey and white.▲ Non-flammable color steel is currently available in three colors: beige, grey, and white. The R&D endeavor continues to diversify the color tones (Image Source: POSCO C&C).The colors are limited to the three tones because the current priority is to ensure the non-combustibility of the new product. POSCO C&C will continue the R&D endeavor to expand the color patterns into solid colors as well as metallic colors.

l POSCO C&C to Prioritize Safety and Sustainability

Non-combustible color steel has various usages. It can be used on walls, roofs, or even as solid structural material. Considering its non-flammable characteristics, however, it can best serve its intended purpose when used on the ceiling or as an interior material.POSCO C&C’s lead researcher In-Kyu Kim addressed the challenges behind developing the non-combustible color steel sheet. Maintaining non-combustibility without compensating the qualities of the conventional color steel was the hardest, especially considering the two-month time constraint to obtain the official certification.Despite repeated challenges and obstacles, POSCO C&C successfully developed an innovative product that will help protect buildings from fires.Not all obstacles are gone — low-price, low-quality color steel from China makes it so easy for the industry stakeholders to opt for a quick fix over safety. The wider application of high-quality non-combustible steel can help save lives, ultimately enhancing overall safety across the country, Kim adds.What’s next for POSCO C&C? The company will continue the endeavor to help build safer buildings. Going forward, POSCO C&C will also continue developing ground-breaking products focusing on environmental sustainability and safety. Color Steel PlateNon-combustibility TestNon-combustible Color SteelPOSCOPOSCO C&CToxic-gas Test
POSCO C&C’s New Color Steel to Take on Fire

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