Konstantin Valerievich, the impressive geography of objects around the world, in particular airports, for more than 25 years, undoubtedly is an sign of trust and unspoken evidence of the quality of the roofing system Riverclack. And, nevertheless, why, in your opinion, airports are chosen exactly by Riverclack?
- Riverclack is an extremely reliable system, given its unique waterproofing and high resistance to mechanical stress caused by wind and snow loads. What's more, it is a maintenance-free product.
Large infrastructure facilities such as airports cannot afford disruptions to operations and operations. Any renovation, especially on the roof, raises a number of safety issues that can affect the usual operation of the air terminal, with corresponding economic and rehearsal consequences. Not to mention the consequences that may arise during the forced complete replacement of poor-quality roofing. Roof reliability and durability play a key role in the selection of a roofing system.
Riverclack Roofing System on Airport Rooftops Around the World (we draw attention to the fact that an interval of 10 years is taken, from 2006 to 2016 - this is ¼ of all implemented projects (airports) for more than 25 years):
| International Airport Tocument / Panama, Panama City | 57,600 m2 | 2016 |
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Huari Boumedienne International Airport / Algeria, Algeria Riverclack® 550 painted aluminum / on-site profiling |
74,200 m2 | 2016 |
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Kurumoch International Airport / RF, Samara Riverclack® 550 aluminum painted RAL9006 |
11,000 m2 | 2014 |
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Mohammed bin Abdulazis Airport / Saudi Arabia, Medina Riverclack® 550 aluminum painted / on-site profiling |
90,000m2 | 2014 |
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El Nuevo Dorado / Colombia International Airport, Bogota Riverclack® 550 aluminum painted / on-site profiling |
69,000 m2 | 2014 |
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Izmir Adnan Menderes Airport / Turkey, Izmir Riverclack® 550 aluminum painted / on-site profiling |
30,000 m2 | 2013 |
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Pulkovo International Airport / RF, St. Petersburg Riverclack® 550 natural aluminum / on-site profiling |
45,000 m2 | 2013 |
| Istanbul Sabiha Gokcen Airport / Turkey, Istanbul Riverclack® 550 PVDF lacquered aluminum / on-site profiling | 42,500 m2 | 2009 |
| Enfidha-Hammamet International Airport / Tunisia, Hammamet Riverclack® 550 aluminum painted RAL9006 / on-site profiling | 26,500 m2 | 2009 |
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Tbilisi International Airport / Georgia, Tbilisi Riverclack® 550 painted aluminum / on-site profiling |
11,500 m2 | 2008 |
| Ankara Esenboga Airport / Turkey, Ankara Riverclack® 550 | 2006 |
The following example may seem like an exaggeration, but it is not at all the case. Once we were contacted from the Tbilisi airport to find a solution to the problems that arose related to the roof. The roofing was installed barely two years before competing material problems arose, but leaks began to emerge from the first weeks after the airport opened. In addition, the roof covering was blown off twice by strong winds. The airport operator, worn out by this situation, having seen live examples and evidence of our roofs being used on airport roofs around the world, no doubt requested a complete replacement of the defective roofing at Riverclack. Soon the Tbilisi airport received the replacement of the previous roof "convertible", as it was jokingly dubbed by the local press, with a new reliable roof of Riverclack.
Do you have an explanation why the roofing did not cope with the climatic loads? Is it the material used or the technology itself?
- In this case, more in the technology itself. Manufacturers often overestimate the capabilities of classic seam systems, especially for complex architectural forms of shells. The fact is that, unlike other seam systems, durable monolithic Riverclack clips allow free thermal expansion of the panels without abrasive wear of the material and guarantee unsurpassed resistance to wind pressure (suction). Due to the unique snapping mechanism of the lock, when the impact of the wind load increases, the panels are securely held by a clip, and the pull-off resistance reaches 7kN / m².
Moreover, the polyacetal resin-based clip material is an effective thermal and electrical spacer between the roof and the lower structure. With the Riverclack concealed fastening system, there are no through holes in the panels and free expansion of the panels.
It is important to note that the high-quality polymer resin from which the Riverclack clips are made is used in electronic devices (computers, laptops, mobile devices), the material remains stable at very high temperatures, and on the other hand, friction with panels decreases, which is important during thermal expansion of panels …
This means, firstly, that Riverclack clips will not degrade under the influence of high temperatures for many years, and, secondly, friction from movement of the panels during thermal expansion will also not affect the clips. Now imagine what happens when the holders and clips rub against each other?
Do you mean that in friction in traditional seam systems, it turns out mmechanical damage, which leads to the breakdown of the roofing, for example, in strong winds or other possible problems?
- Yes it is. As you already understood, the Riverclack system itself, its uniqueness, durability allows you to avoid such problems, in particular, with regard to the most serious (hurricane) wind loads.
Another unique and perhaps the most important feature of the Riverclack roof is its absolute waterproofness, even in flat areas, which is achieved thanks to a hidden drainage channel. The patented hidden channel of the Riverclack roof system is unrivaled by any other seam system.
In case of heavy rainfall, for example, water can drain slowly or linger on the roof for some time. In a situation where the water has nowhere to go, the water level rises and the profile quickly becomes submerged. But in the case of Riverk, it is the drainage channel that drains any water droplets into the gutter that can penetrate the flank of the castle, eliminating the risk of leaks in the building.
Are you saying that water resistance is achieved even in flat areas, without any slope? Shouldn't the roof have a slope of at least 1.5 degrees? And how is watertightness possible without sealing the drainage channel itself?
- According to Russian standards for a slope of 3%, Riverclack can be laid freely (SP17-13330 rev.1 ed.2.). However, based on our international experience, the Riverclack system can be used throughout the structure of a building with a minimum slope of 0.5% if the slope is less than 30 meters, and 1% if the slope is more than 30 meters. We have carried out various tests and have the appropriate certificates. I'll give you an example. In order to test our product in emergency situations, a pool was made with a bottom from Riverclack panels - without any seals or sealer seals. The pool was filled with full submersion of Riverclack panels and left in that state for 45 days. During this time, not a single drop seeped through the coating. After completely dismantling the test rig, only a few drops of water were found even in the drainage channel.
The water tightness of the Riverclack system is confirmed by the ASTM E2140 Standard Test Method for Water Permeation Through a Metal Roofing Panel System under Static Water Pressure with Test Report 456-0311T-11C and ASTM E1680-16 Standard Test Method for Verifying Air Permeation Through an Outer Sheath metal roofing panels.
This characteristic is very important, also in order to avoid problems associated with the penetration of sand and dust. We believe that traditional standing seam roofing systems can have big problems due to the fact that the system "breathes". Moreover, it must be admitted that moisture can also seep through the seams of traditional seam systems at a difference in temperature and humidity levels and get into the roofing "pie". In the case of Riverclack, such problems are out of the question.
In the roofing market, 3000 series alloys are widely used., including for the roof of airports. But, Riverclack was the first in the industry to use the 5754 H18 alloy machining technique. Why does Riverclack use this particular alloy, what are its advantages?
Why settle for less when 5754 is far superior to 3000 series alloys?
Riverclack knowledge and experience gained over 30 years of operation, as well as know-how allowed to achieve the perfect balance between endurance and elasticity of alloy 5754 H18 and learn how to profile this alloy to obtain the unique properties of Riverclack.
Did you know that only 5754 H18 Riverclack panels are capable of handling significant point loads without deforming at all. Alloy 3000 panels are unable to cope with such loads without adequate support in the form of a solid rigid element located under the panel, irreversible dents appear on their metal surface.
In other words, Riverclack panels can be walked on immediately after installation, without leaving any dents, even after numerous walks on their surface. What does this mean? The unsurpassed flexibility and resilience of 5754 H18 aluminum.
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zooming 1/5 Adnan Menderes Izmir Airport Provided by Riverclack
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zooming 2/5 Pulkovo International Airport, RF, St. Petersburg Provided by Riverclack
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zooming 3/5 Huari Boumedienne International Airport, Algeria Courtesy of Riverclack
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zooming 4/5 Kurumoch International Airport, RF, Samara Provided by Riverclack
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zooming 5/5 Tbilisi International Airport, Georgia, Tbilisi Provided by Riverclack
Agree, dents and other panel deformations are, at the very least, not aesthetically pleasing. For our company, one of the most important points, along with the reliability of the roof, has always been its aesthetics. We have always stated that only with Riverclack does roofing become an architectural value. This is confirmed by the portfolio of our projects, many of which have received the most important international awards in architecture and construction, for example, recent: Irina Viner-Usmanova Rhythmic Gymnastics Center, Grozny Mall Shopping Center and others.
The Riverclack panels are tested for resistance to foot loads in the laboratory: the forward / reverse movements of the pressure rubber piston foot constantly increase the point load on the Riverclack panels, simulating constant walking movements, demonstrating an incredibly high load resistance value of almost 400 kg. Tests in accordance with UNI EN 14782 have been carried out to ensure safe walking on Riverclack roofs. Pedestrian loads were simulated in a laboratory setting by applying a point load of 1.2 kN (approx. 120 kg) in the center of a straight section of the panel using a rubber piston sized to match the area of a human foot. Riverclack panels with a nominal material thickness of 0.7 mm and a clip pitch of 1.2 m do not require a continuous layer of hard wool underneath. The piston simulates the effect of a concentrated load of 450 kg on the middle of the panel (this value is much higher than the tolerances given in the pan-European standard UNI EN 14782). After removing the load, the panel returns to its original position completely unharmed.
Thus, 5754 H18 means any Riverclack roof is fully foot-load resistant without any threat to metal sheathing. Lightweight and tough, the 5754 aluminum-magnesium alloy is also widely used in the aviation, automotive and container industries.
Second, its excellent resistance to atmospheric and marine corrosion is ideal for marine applications where it performs much better than standard 3000 series alloys.
Comparison of coiled aluminum between alloys 3004 and 5754
| Aluminum alloy 3004 | Aluminum Alloy 5754 (Marine Alloy) | |
| Definition: | AS 3004; DIN AIMn Mg1: EN AW-3004P; JIS A3004P; NF A 3004 | DIN AIMg; EN AW - 5754; NF A 5754 |
| Corrosion resistance | Good | Excellent |
| Dynamic loads | Weak (plastic material) | Excellent (elastic material) |
| Tensile strength limit: N / mm2: | 220 | 320 |
| Yield strength, Rp0.2, N / mm2: | 170 | 280 |
| Using: |
- development and creation of warehouses -industrial seam roofs -welding of irrigation pipes -container sheet - road transport purpose |
- in a maritime climate, where strength and resistance to corrosive formation are needed - roof and floor use - chemical and nuclear welding - equipment and containers in fish processing and other food industries -professional list. |
Moreover, another significant point, our roofing system allows the use of panels with a lower thickness (0.7 mm and 0.8 mm) than other companies (min. 0.9 mm), while maintaining all its excellent characteristics.
Sounds more than convincing. However, you cited above the example of Shota Rustaveli airport in Georgia, explaining the reasons how and why the classical roofing system did not cope with the climatic loads, and in your practice, were there any unsuccessful examples when the Riverclack system itself, as they say, did not work? Kuromoch airport in Samara, for example?
- No, there are no such examples in our practice.
With all my professional confidence, I can say that the Riverclack system, compared to other roofing solutions on the market, can be said to be perfect. I think the examples given above, regarding its properties and capabilities in comparison with other classic folding systems, as well as constantly laboratory tests, numerous certificates, etc., are quite convincing. In our experience, only minor problems have rarely been encountered; all of them were caused by non-compliance with technical instructions during the design or during the installation process. In the case of Kurumoch Airport, it was the contractor's failure to comply with technical instructions during the installation of the substructure in combination with strong wind loads (hurricane) that played a key role.
Moreover, I want to note that at present, we are working on obtaining the Australian certificate of hurricane resistance of the roof (all tests have been passed, we are waiting for the issuance of a certificate), as well as the Miami-Dade certificate, the presence of which means compliance with the highest and strict requirements for hurricane-prone regions).
I also want to note that the problem was eliminated in the shortest possible time together with the Flatiron company. Riverclack has always supported its contractors to resolve any issue. We are a "full cycle" company. We manufacture, design, provide technical support. We are with a client 24/7. This is very important because, first of all, it is our reputation, the reputation of the Riverclack brand. That is why we have extremely positive feedback, both in the global and in the Russian market. Our team quickly gave a technical solution to the problem that had arisen, and it was fixed.
Another question is when, following all technical instructions, including during installation, the roof is torn off by the wind or there is a problem of leaks, as it happened, unfortunately, with Shota airport in Rustaveli in Georgia, then this is already a problem in the roofing system itself, which is not coped with climatic loads. The Riverclack standing seam roofing system has one of the highest wind pressure resistance ratings in the industry, absolute waterproofness, unrivaled properties of the 5754 aluminum used, and unique design characteristics. The Riverclack System has been repeatedly tested in independent laboratories to the strictest international standards, including DIN, EN, UNI, IEC, ASTM, UL, FM, Avis Technique, AS, GOST R and many others. Riverclack roofing systems have been accredited by world-renowned technical control and certification boards: ITC-CNR, DIBt, BBA, CSTB, TÜV, NATA and FM Approvals.
26 years have passed since the construction of the first airport. How has customer request changed?
- Without a doubt, there has been a big change in the conscience of clients in the selection of contractors. Whereas in the past we had to explain the importance of a single panel for the entire length of the roof, the inadmissibility of using feed-through screws on materials subject to thermal expansion, the importance of ease of installation and minimization of roof maintenance, today the customer himself finds answers to his questions in Riverclack.
By the way, as far as the installation process is concerned, the installation technology of the Riverclack roofing system is another great advantage of ours over the installation technologies of classic folded systems.
Installation of Riverclack panels is so simple that, roughly speaking, even a child can handle it.
Installation does not require a manual or mechanical seaming machine or preliminary drilling of the substructure. Pre-placement of clips is also unnecessary. The unique high strength Riverclack self-latching profiles are mounted by simply pressing the foot onto the specially designed polyacetal clip. The system does not require time-consuming and time-consuming preliminary placement of clips: their position on the crate is automatically determined during the installation of panels. The speed and ease of installation of Riverclack can bring significant cost savings during construction.
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zooming 1/6 El Nuevo Dorado International Airport Courtesy of Riverclack
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zooming 2/6 Ankara Esenboga Airport Photo © Ali Epikman / provided by Riverclack
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zooming 3/6 Rome-Fiumicino International Airport named after Leonardo da Vinci. Terminal 3 Provided by Riverclack
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zooming 4/6 Tocumen International Airport, Panama Provided by Riverclack
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zooming 5/6 Mohammed bin Abdulazis Airport, Saudi Arabia, Medina Courtesy of Riverclack
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zooming 6/6 Enfidha-Hammamet International Airport, Tunisia, Hammamet Courtesy of Riverclack
At the same time, I want to especially note that the installation technology allows you not to limit the length of the panels, even in the case of very complex architectural forms. Only with Riverclack is it possible to realize this unique possibility of panel continuity across the entire building structure.
I would especially like to note that the preparation of the editing subsystem plays a huge role, we have very high requirements for it. If it is mounted as accurately as possible, then there will be no problems. Yes, it is sometimes difficult for installation organizations, but on the other hand, this is a huge plus in the case of installing a roof of complex, irregular shapes, with bends and twists. Our panels are manufactured on high-tech equipment that most accurately repeat all the features of the roof, and if the requirements for the subsystem are not met and implemented inaccurately, then our clips will not allow the panel to be installed, thus ensuring the exact correspondence of the installation to the specified parameters.
Since we have already started talking about installation, tell us how the installation of calipers is carried out on your system? It's no secret that this is almost the main pain of every architect
- Safe operation of the roof is one of the most important issues. Absolutely any safety elements (snow barriers, fences, anchor lines, roof bridges, roof steps, etc.) can be easily and easily fixed on the Riverclack panel. The choice of these or those supports (supports) depends on the type of equipment installed, loads and other technical issues. The calipers are installed directly on the Riverclack locks, and, very importantly, without perforation of the panels and the whole coating. All our Russian projects are equipped with security systems.
Konstantin Valerievich, are there any special opportunities, technical solutions related only to this type of objects?
- There is a general trend that unites almost all infrastructure facilities. It consists in guaranteeing, in addition, of course, the durability of the roof, maintaining the comfort of the temperature and acoustic environment. In particular, in airport halls, where the lower part of the roof is the direct ceiling of the building, the premises require an adequate noise absorption system using sound-absorbing materials.
To reduce the reflective surface of airport roofs, it is possible to use aluminum with different finishes, for example Stuco or a special paint.
What's more, big projects provide architects with a tremendous opportunity to express themselves. This reinforces the growing trend towards bold architectural solutions, intricate, curved shapes. And Riverclack, through continuous technical development, the incredible capabilities of its own roof panels, can provide customized solutions to shape any architect's idea.
The Riverclack Roof System is truly the best choice for architects around the world.
What's next? What plans does the company have for the next 2021? Surely there are a couple of giants in mind?
- Of course have. Further only better, as they say. Just the other day, we completed the installation of the roof at the new Kuzbass ice rink in Kemerovo. This is our next giant, the official opening of which will take place in March 2021. It must be said that the palace is unique both in its functionality, and, if possible, transforming the arena for any kind of sports, and in its grandiose scale. The palace with an area of about 64 thousand square meters. meters is incomparable with any of the largest objects in Siberia.
Yes, indeed, Kuzbass will become the largest sports complex beyond the Urals
- I can confidently say that the roof of the ice arena is undoubtedly of architectural value. Taking this opportunity, I would like to thank our permanent contractor, the Flatiron company, which was mentioned above, and personally the General Director Alexei Popov, first of all, for the professionalism of his team, reliability, correctness and timeliness of the decisions made. With such contractors, airports, sports palaces, stadiums, in general, large-scale projects are easily conquered by Riverclack.
For the official opening of the palace in March, we will definitely give detailed information in a press release about the progress of the project and about all the features of the complex architectural form of the roof of this amazing object. Now I just want to note that the main feature of the roof on the ice rink blocks is a surface with a double curvature. The hemispherical shape of the roof, in contrast to flat roofs, requires special attention to detail. In order to obtain the correct placement of the roof substructure components and timely identify possible surface defects, Riverclack designers built a 3-dimensional mathematical model of the ice rink roof. The mathematical model of the Kuzbass ice rink took into account such parameters as a given roof geometry, radii of its surfaces, slopes of slopes, physical characteristics and capabilities of Riverclack roofing panels, as well as permanent and temporary loads inherent in the climate of the construction region (high snow and wind loads - Siberia, the Far North, the Far East).
We carried out a comprehensive analysis of the surfaces and, even before the start of work, discovered a number of problem areas, which made it possible to draw attention to them in a timely manner and issue a list of recommendations for eliminating defects at the installation stage. Here we worked well with Flatiron.
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Taking this opportunity, I would like to wish our dear customers and partners a Happy New Year and Merry Christmas! Contributed by Riverclack.
