20. YEAR OF TUCSA
Turkish Constructional Steelwork Assosiation, established in 1992, carries the honor of the 20. Year in 2012.
WHAT ARE THE EXPECTATIONS OF STEEL BUILDING ARCHITECTS, ENGINEERS AND FABRICATORS FROM STEEL MATERIAL PRODUCERS?
SteelOrbis Market Talks Bursa Meeting was held on 24 February 2012 in Almira Hotel. During the meeting organized by SteelOrbis, steel building fabricators and steel construction material producers came together by courtesy of Turkish Constructional Steelwork Association (TUCSA). Tuncer Çakmaklı (Tuncer Çakmaklı Architecture), Onur Güleç (OGP Engineering), Dr. Selçuk İz (İz Engineering), Selami Gürel (Metal Yapı), Güvenç Temizel (Borçelik), Kerem Külekçi (Borusan Mannesmann Pipe) ve Dr. Kağan Yemez (ArcelorMittal DS Rozak) were speakers of the "The Expectation of the Steel Buildings from the Steel Sector" panel session moderated by TUCSA Vice President H. Yener Gür'eş. Some of ideas arisen during the meeting we compiled below for the ones that missed…
Tuncer ÇAKMAKLI: "The question of economy of the steel disappears when you can bring out architectural design and engineering solutions."
Onur GÜLEÇ: "In order to achieve success in a steel project, it is the best way that the architect, the engineer and the manufacturer work together from the beginning of the project."
Selçuk İZ: "When I design a system in a space frame, it becomes light, when I design it by using hot rolled profiles it can naturally be heavier. I mean, all designers result in the same value under the same weight, with the same specifications. Each project has to be designed and solved in itself. "
Selami GÜREL: "[To audiences] Invest in steel buildings, and we can realise your dreams. But first of all the government, and banks and the insurance sector have to support this field."
Güvenç TEMİZEL: "We have high level of technical knowledge, we can easily meet the demands of the steel construction sector."
Kerem KÜLEKÇİ: "We have such a small number of manufacturers who really know the norms of constructional steel, and mention about these norms when they procure the material. We see lots of wrong choice and misused material unfortunately."
Kağan YEMEZ: "The engineers have to believe in that they can find the material they need for the project. Steel fabricators want it to finish fabrication rapidly, in order to achieve this speed the required steel materials have to be easily supplied and erected."
Nedret OGAN, the owner of Double Tree By Hilton Avcılar, the first high rise steel construction in Turkey:
"This building is the reality of Turkey"
Up to now, I've completed millions of m2 of constructions. But I always said "Wish I build a steel construction before I die, make it for Turkey, I should be that person". I wanted to be called as "The constructor to have built the first high rise steel building of Turkey" in the literature. As the owner, I supported the idea of this building to be made of steel. Our architect was also very ambitious. This is the result of a co-operation. This is the reality of Turkey. Someone in Turkey had to do this.
2683 tons of steel were used in this building. I imported the steel from ArcelorMittal, here I would like to thank them, they really helped me a lot, I brought the steel from Luxemburg to Gebze, then to Ankara for fabrication, then I brought to Avcılar for erection. I completed the steel structure less than a year, almost in 7-8 months. I have built a building which is 110 meters high, 32 floors, clever building, green, sensitive to the environment by also using solar energy.
I believe that this building is one of the strongest buildings in Turkey. I would like to thank to our architect, our engineer, our manufacturer, professors who mentored us during the project and our steel supplier. It was a great team work. A great knowledge and experience has been created.
EGE PARK BALÇOVA SHOPPING MALL BOWLING HALL TERRACE ROOF
Title of the Project: Ege Park Balçova Shopping Mall Bowling Hall Terrace Roof
Owner: KTZ Real Estate Consultancy Co.
Revision Architect: Gözde Günüzalp – İDA Design Consultancy
Statics Designer: Orhan Aslan – Adapark Engineering
Main Contractor: Onurel Construction LLC.
Steelwork Fabricator: TAYKON LLC
For a project to design strong and esthetical building, it was decided to use a steel lattice beam made of hot rolled products with wide flange and H section plate girders. Steel trusses for 25 m span and to bear heavy loads were designed as one-piece due to the structural reasons. It would have caused some fabrication and transportation difficulties, but all the mentioned problems have been eliminated by a well planned spadework. Consequently, delivery and erection have been completed in time as planned.
ALSANCAK INDOOR SPORTS CENTRE REVISION
Title of the Project: Alsancak Indoor Sports Centre Revision
Owner: Turkish Volleyball Federation
Revision Architect: Taylan Güyer -Artek Architecture
Statics Designer: Halil İbrahim Pehlivan
Main Contractor: Vera Elkon Joint Venture
Steelwork Fabricator: TAYKON LLC
Considering that the building does not have enough infrastructure for certain games, it was planned to increase the capacity by revising the existing structure. As the building capacity has increased, the area of the roof to be covered became larger. The construction of such a building in the most crowded point of the city brought out some physical difficulties as well. Even though it had looked complex and costly at the beginning, the management of the project with realistic planning and intellectual teams made the job easier and provided the ability to finish it before the promised time.
Before starting fabrication of the project, all necessary controls from architectural, structural and mechanical applicability point of view have been done. Consequently, all potential problems were eliminated by making detailed calculations and developing alternative solutions on the white paper. Erecting such a volumetric construction at the city centre, without affecting the city life, was the greatest problem for us. Steel structure has been modelled by 3D modelling system before the fabrication process. The problems which may come out during production, delivery and installation phases have been foreseen in this modelling study. For the solution of these potential problems, steel structure was divided into optimum number of pieces by using the applicable connection systems, and then easy delivery and erection plans were prepared.
If we need to talk about the production process in steel construction, standard profiles made by S235JR material were generally used. Besides, the connection plates were also S235JR. The 10.9 quality bolts were used in connection details. All of the fabrication processes have been done according to DIN 18800-7 and EN 3834-2 standards. The 3D spatial design used in steel structure made it necessary to apply precise measurement controls during the fabrication. First of all, the template mechanism which is going to be the main body of the building was prepared, after that all of the steel trusses were manufactured by determining the inner calibres.
In order to avoid the waste of time at the construction site, rehearsal erection was done in the factory, final erection and health & safety plans were prepared according to the results of rehearsal erection. Parts were transferred above top of the building, and by the help of 3 winches installed to the current building, and the erection was rapidly completed in a short period of time.
In spite of various difficulties stemmed from its dimensions and erection limits in comparison with other traditional steel buildings, this project has been delivered before the promised time by means of the realistic working programmes and foreseen solutions. During these processes, the emphasis on health and safety can be considered as one of the most important factor in delivering the project without any problems.
FENERBAHÇE INTERNATIONAL SPORTS HALL ÜLKER ARENA
Fenerbahçe International Sports Hall Ülker Sports Arena, has a capacity of 13.500 people. The height of main hall is 28 meters. At the Arena, load bearing capacity of the roof, the dimensions of the gates to enter inside, the ability to take many lorries in makes it possible to perform worldwide productions here in this Arena.
With 6 changing rooms as well as 5 more small changing rooms, Ülker Sports Arena is able to host many international sports organisations easily.
The Arena with a capacity of 13.500 people, 44 lodges, restaurant with the view of the hall, private areas, a small sports of 2.500 people capacity for both training and games, brings many initials into life in Turkey.
Technical Information
Basketball audience 12.500
Concert audience 13.100
Basement Floors (parking area): 31,700m2
Arena Floors: 43,850m2
Total: 67.000 m2
Project Date : 2008-2012
Title of the Project: Ülker Sports Arena
Owner: Sağlam Construction
Architectural Design: DDG, Ömerler Architecture
Statics Design: Balkar Engineering
In the plan, Ülker Sport Arena has an architectural geometry that is formed of the combination of two half circles with different centres. The foundation of the building is raft foundation with pile, and the main structure made up of reinforced concrete. Since the roof has wide span, it was designed as steel structure. The first two storeys above the foundation of the Arena are used as parking area. Basketball court which has international dimensions, tribunes, meeting hall, suites, VIP, changing rooms etc. takes place above the parking floors. Within the project, there are 4 more blocks to utilise for different purposes one of which is for training in addition to the Arena.
The foundation elevation of the Arena is -7.00 and upper elevation of steel roof is +37.50. Floor heights are, 3.20 m at the first basement, 3.80 m at the second basement, and 6.11 m, 5.79 m, 3.92 m, 8.68 m and 5.80 m at the other storeys. The maximum distance between the vertical load bearing columns of the building is approximately 120 m.
Ülker Sports Arena is designed in accordance with the Turkish Earthquake Code (DBYBHY 2007). As well as Turkish standards and regulations, European and American codes and standards like Eurocode 2, UBC and ACI318 were also used. The building takes place on the 1.degree earthquake zone and the building importance multiplier is accepted as 1.2 Lateral and vertical loads on steel trusses during the operations, have been also taken into consideration in the design of the roof. In addition to these loads, loads of mechanical system, the scoreboard, sheeting, snow, etc. were also calculated.
The C30 and C35 class concrete and the S420 class concrete reinforcing bars were used in the building. For the constructional steelwork, St37, St52 and higher quality structural steel was used.
The concrete system of the building is made of frames and curtains. The structural system of the building was designed as column/curtain+beam+plate. Columns and curtains are placed on ground plane at each earthquake direction, according to the rules which imposes that the centre of gravity and the centre of rigidity of the building should be close to each other. According to the architectural requirements of the building, the structural system is made up of radial and tangential axis. Dimensions of columns are 250/100cm for the steel roof bearing columns, while the other columns are 120/100cm, 100/100cm and 80/80cm. The beams connecting the columns to each other are 100/60cm (on the first floor) and 100/80cm (on the upper floors), and so the main frames are created. While the main structural beams of the tribunes were the inclined concrete beams which were produced at the construction site, the precast elements produced at the factory were used between those concrete beams.
The steel roof system consists of 8 main steel trusses with spans between 55 to 90 m and beams and bracings vertical to steel trusses to maintain the stability of the trusses. Besides, there are stability bracings at the roof platform. Upper and lower flanges of trusses were made of thick and wide flange HD profiles. In order to carry additional weights, a special platform (Rigging Structure) at the roof was designed. This platform was made at the lower headings level of trusses. Such a system was necessary above the court, to help establishing a scene for some activities, carrying lighting and mechanical equipments. The platform is connected to the main trusses with traverses which have a system like a grill on both sides. Two main trusses with the widest span, and taking place in the middle of the roof are also to carry the scoreboard as an additional weight. In order to maintain the homogenous distribution of the lateral loads on the roof which may caused by an earthquake, elastomer bearings which have certain horizontal rigidity were used.
Architect Bünyamin DERMAN:
"STEEL IS LOSSING ITS PRIORITY IN DESIGN ..."
The reasons of that we rarely see the steel constructions in Turkey are totally the cost and that such a tradition has not been settled yet. Let's think about it, in factory constructions, when the span reaches to a certain width, they say "let's change it with steel", concrete is not preferred. Why? Because the cost is much better in steel in this case. We are in such a situation, of course we cannot think of a material other than steel for special buildings, for projects such as stadiums or airports. You can do everything with every material, but on the topics like being economic, flexible in design, in form, steel is of course a flexible material, it is light, you can use it for any wide spans you like.
The disadvantage of the steel is protection, and in fact, the most important factor increasing the cost of the steel is fire protection. The other advantages are already known by everyone. Fast production, production at the work at the workshop, clean finishing etc. everyone knows and cares for these points. And when you look at the material production, H profiles came to Turkey late and expensive. Normally, it is very difficult to construct a building with the steel made in Turkey. Very hard, it is produced up to a certain point. I think, the material usage process in architecture in Turkey is not like the ones in America or Europe. We do not have such a tradition, detail tradition. Our engineers have not improved themselves much in this way. We have very capable engineers, I keep them apart, but in generally, we started to observe improvement in design engineering lately. We need to work more together.
We slowly started to learn about steel. Before the last 10 years, buildings with huge dimensions were not built. International experience of the contractors and the construction sector, the huge projects by designed by Turkish architects have naturally accelerated this progress. We had just one or two airports, but now, there is one in nearly every city, and this type of buildings are mostly made of steel. When you examine the roof system, I can easily say that the 70% is steel. When this type of projects become a current issue, the architects gain experience on this field. Steel was used in industrial structures, but it has not serve the improvement of steel design so much. Now, we have more steel construction experience. The subject of the construction is very important. I like the exposed steel, I don't like to cover it. For me, it is worth to demonstrate the fineness of the steel in structures. In my architectural point of view, when you achieve something, you have to show it honestly. Why do we ask for details from our engineers, because of this reason. In fact, the steel improved a lot, in the way of design language, together with the designers. The materials are also improving, as the demand increases. Incredible structures have been built in the world by using high-tech steel materials. I mean, there is magnificent progress in steel. The materials gain meaning with the designers. When you use the material effectively, you can make it esthetical, stylish and cheap.
A TURKISH BRAND IN PAINT: POLİMİKS
Polimiks; was established in 1987 under the name of "Taç Boya", in order to supply the material need for qualified paint and side materials in industry sector, foremost automobile industry. Taç Boya, changed the name of the marketing company, Taç Boya Kimya San. Ltd. Şti., which was established to spread and strengthen the registered trademark "Polimiks" in 2009 as Polimiks Boya Pazarlama Ltd. Şti. Since the day of establishment, Polimiks has been always improving itself, expanding the range of product and services, and executing the production, paint shop management, technical service and sales- marketing activities together. With its becoming stronger structure, Polimiks focuses on developing production technologies with its R&D activities, developed non corrosive systems for industrial sector, floor coating and strengthening products for marble and construction sector, epoxy and polyurethane moulding resin and coating systems for electronic sector. Polimiks also supplies the need of wider and more specific application areas with special products.
With a customer oriented approach, Polimiks is applying technical support programmes emphasising on high quality, reliability, respectful to the environment, highly efficient, meeting the customer expectations, and considering Polimiks as a solution partner of its clientele.
With this perception, Polimiks gives project support to its customers for cost-effective solutions by determining the right paint system to meet the requirements after analysing the surface to be painted and environmental conditions of location where painted material will be used. As the projects start, they help to get the maximum efficiency from the paint system used during the painting process, by making measurements and analysis in place with certified paint inspectors. Polimiks Technical Support Team supports its customers by giving educations and training to painters and QA&QC personnel on painting and application techniques in order to improve their qualifications. With the field test reports prepared by certified technical teams after the technical inspections, the customers can deliver the inspection activities to Polimiks and with these reports, contribution to the communication and approval process between the owner of the project and the contractor is provided during the realisation of the project. Polimiks has; ISO 9001:2000 Quality Management System, OHSAS 18001 Work Health and Work Safety Management System, ISO 10002:2004 Customer Satisfaction and Complaint Management System, Water Regulations Advisory Scheme documents.