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O PT IMIZATIO N O F BIM I N FR EE- FO R ME D D E S IGN a Busan Cinema Center is a landmark feature of Busan and is a dedicated theater for

the BIFF (Busan International Film Festival), which is one of the top film festivals in Asia. The building incorporates a theater, indoor and outdoor cinemas, convention halls, office spaces, creative studios, and dining areas in a mixture of sheltered and linked indoor and outdoor public spaces. The design of these spaces supports a flexible and hybrid functionality that can be used both during the annual festival period and a dayto-day use without interruption. The building is designed by Coop Himmelb(l)au, the world famous architects from Austria, and Daesung C.P Engineering adopted Tekla’s Building Information Modeling (BIM) software to produce the detailed shop drawing.

O Dureraum spans 32,137 square meters and has a 4,000-seat outdoor performance hall with excellent facilities. It is composed of three separate buildings: Cine Mountain, BIFF Hill, and Double Cone. The buildings range from 4 to 9 stories high with a combined total floor space of 54,335 square meters. Cine Mountain Functions: Multipurpose entertainment center: Haneulyeon Theatre and Three multiple theatres (Cinema I, Cinema II, and Cinematheque.)

Big Roof Length: 163 meters Width: 61 meters Weight: 4,000 tons

BIFF Hill Functions: Convention center, Executive office of BIFF

Small Roof Length: 99.2~120 meters Width: 65.8 meters

Double Cone Functions: CafĂŠ, Restaurant, Bar, Lounge, and VIP entrance during the film festival

THE L O N G E ST C A N T I L E V E R E D R O O F IN T H E W O R L D O The essence of Dureraum’s beauty is its super-sized roof known as the Big Roof, which is 163 meters long and 60 meters wide with an 85 meters cantilever portion and weighs 6,376 (metric)tons, making it the longest cantilevered roof in the world. Using the Double Cone as its pillar, the Big Roof stands 165 meters high and supports a facility 21 meters above the ground. The front and back of the Big Roof were completed on the ground level, and were hoisted up on a tower crane before being attached where the Double Cone is supporting the structure.


ACC U R AT E C A M B E R V A L U E O The underside of the Big Roof is designed as a rolling cloud (free curved surface shape), and the top of Big Roof is a plane structure having a circular-shaped opening. The cambering function in Tekla let the team apply accurate camber value to the Big Roof. “The most challenging part was to put an accurate camber value considered the deflection of the cantilever because of its self-load after construction. Tekla’s BIM software showed all aspects of the model by setting multiple views and it decreased the number of detailing errors. We could do this with 2D shop drawing, but it is time-consuming and it also contains too many errors, but with Tekla we saved time and money.” says Donghyuk Lee, Drawing office manager of Daesung C.P Engineering

WHO: BUSAN METROPOLITAN CITY WHAT: LONGEST CANTILEVER ROOF WHERE: KOREA(SOUTH) WHEN: 29 SEP 2011 The roof of the Busan Cinema Center (South Korea) features a cantilever that extends 85 m (278 ft 10.45 in) from its single cone-shaped column support. longest-cantilever-roof

LIF T U P MET H O D O When the ceremony was held to celebrate the completion of the frame work of the Big Roof, it drew attention for applying the Lift-up method to the architecture. According to HanJin Heavy Industries (Constructor of the Busan Cinema Center), the lift-up method for the longest truss structure was new and advanced.

더블콘 F R O M C O N C E P T U A L D E S I G N TO DETA I L ED DES I GN O The Double Cone is the only vertical structural support for the large cantilevered roof acting as a large, singular column as an exposed structure. Therefore, it was significant to set up the direction of each steel frame’s face. “In the conceptual design phase, we underwent trial and error to set up the modeling direction of each diagonal steel member. The Double Cone consists of three different circle sizes and the steel members of each have different angles of rotation. We came up with an idea to create a beveled central point with NEC (New Engineering Consultants) technical support. One very challenging aspect of the project was to apply accurate angular values to all the members because each inner side has a different angular value with the beveled central point as the center. However, Tekla’s realistic simulation allowed us to detect, prevent clash, and complete this work with much less time and without errors.” says Donghyuk Lee, Drawing office Manager of Daesung C.P Engineering

Daesung C.P Engineering Daesung C.P Engineering is 3D detailed shop drawing company with more than 20 years experiences and is located in Busan, Korea. Daesung C.P Engineering has been working on lots of projects with Korean major construction and engineering companies like Samsung engineering, HHI(Hyundai Heavy Industries), HHIC(Hanjin Heavy Industries and Constructions), and Lotte E&C. Daesung C.P Engineering has been using TEKLA to general buildings, free formed buildings, and Plant since 2000. Their notable work is Busan Cinema Center and currently they are working on Lotte World Tower.

D E C IDIN G T H E D I V I S I O N PO I N T O Tekla improves the collaboration and communication between the constructor, fabricator, and shop detailer, and thus fulfills the user’s needs more accurately. The vaules of center of gravity from Tekla improve the efficiency of operation of tower crane in the constuction site.

SIG N IF IC AN T I N C R E A S E I N A C C UR A C Y O Double Cone and steel work ramp (Pedestrian overpasses) have a streamlined shape, all their structural steel members have different angle of rotation. Thus, it is impossible to draw the coordinates of the structural steel members on the execution drawing with 2D shop drawing. “We were able to improve the accuracy with minimized errors by inputting accurate data to each member through Tekla 3D modeling. Tekla contributed to improvement of the detailing quality and kept the model and drawings consistent when changes happened without errors in the fabrication and erection. Tekla is the optimum solution to increase work efficiency.” says Byungwook Kim, Project Delivery Director of Daesung C.P Engineering

“Double cone consists of built-up members and each has a different weld bevel value. We were able to apply an accurate weld bevel value to all the members through Tekla 3D Model, and it helped us deliver the project ahead of schedule with virtually zero errors. We saved a lot of time, manpower, and money thanks to Tekla.” Byungwook Kim, Project delivery Director of Daesung C.P Engineering

FREE- FO R M E D D E S IGN WI TH TE K LA O Tekla model contains all the information related to the entire work process including conceptual design, detailing, fabrication, and construction based on detailed modeling and improved communication amongst all parties involved in this project. “We were able to finish Busan Cinema Center project successfully based on Tekla’s strong functions and excellent NEC(New Engineering Consultants) support. Adopting Tekla to this complex project was the best choice we ever made. We will definitely use Tekla again for future projects.” - Byungwook Kim, Project Delivery Director of Daesung C.P Engineering


a With an ambition to multiply its customers’ potential to think and achieve big, Tekla provides a BIM (Building Information Modeling) software environment that can be shared by contractors, structural engineers, steel detailers and fabricators, as well as concrete detailers and manufacturers. The highly detailed as-built 3D models created, combined and distributed with Tekla software enable the highest level of constructability and production control. Centralizing building information into the model allows for more collaborative and integrated project management and delivery. This translates into increased productivity and elimination of waste, thus making construction and buildings more sustainable.

T With its software, Tekla Corporation drives the evolution of digital information models and provides more and more competitive advantage to the construction and infrastructure industries. Tekla software is used worldwide to model all types of buildings. Tekla was established in 1966, and today it has customers in 100 countries, offices in 15 countries, and a global partner network. Since 2011, Tekla has been a part of the Trimble Group.

Tekla is a registered trademark of Tekla Corporation in the European Union, the United States and in several other countries.