Seismic-resistant ceiling: Seismic retrofitting of the music hall ceiling with lightweight materials! Lattice fixed ceiling.
The seismic retrofitting of the music hall ceiling can be done without the so-called "semi-structural" steel framework! An integrated ceiling using lightweight materials [grid-fixed ceiling].
The renovation of the music hall ceiling is said to have no choice but to adopt a so-called "quasi-structural" approach... However, there are cases where the plan is not progressing due to various issues. Challenges of the music hall ceiling renovation: 1. Acoustic aspect: Changing the shape of the ceiling alters the acoustics. 2. Structural aspect: The existing structural framework may not withstand the load of steel reinforcement required for "quasi-structural" conversion. 3. Design aspect: "Quasi-structural" conversion through steel reinforcement requires structural calculations. 4. Construction aspect: In the case of "quasi-structural" work, cranes cannot be used for lifting steel to the ceiling, causing difficulties. 5. Construction aspect: There are many ceiling installations such as catwalks and air ducts, making it impossible to assemble steel frameworks. The construction method that overcomes these challenges is the "Lattice Fixed Ceiling." The Lattice Fixed Ceiling is an evolved form of the TEC method, achieving a seamless ceiling with lightweight materials! What can be achieved with the "Lattice Fixed Ceiling": 1. Acoustic aspect: A "seamless" ceiling can be created, allowing for the reproduction of complex shapes, eliminating the need for further acoustic design! 2. Structural aspect: It can support a load almost equivalent to the original suspended ceiling. 3. Design aspect: No structural calculations are needed due to the lightweight material system. 4. Construction aspect: The lightweight materials allow for lifting using winches or manual labor. 5. Construction aspect: It can be assembled while navigating around ducts and other installations.
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basic information
Features of the Grid Fixed Ceiling: - Developed by advancing the ceiling substrate system technology using square pipes (TEC method). - Compatible with specific ceilings. - The ends are secured to the walls, eliminating clearance and achieving a gapless ceiling. - Due to the "gapless" ceiling secured at the ends, it is not classified as a "suspended ceiling" as defined in Notification No. 771. - Achieves a horizontal allowable load of 7000N and a natural period of less than 0.1 seconds, resulting in an "integrated ceiling" that moves together with the structural framework during an earthquake. - Even when the ceiling height exceeds 2m, it can be accommodated by adding horizontal reinforcements every 1.5 to 2m. - The spacing between suspension bolts is acceptable at 1.2m pitch. - Obtained architectural technical performance certification from Bureau Veritas Japan (No. BVJ-PA22-003). There are numerous cases where music halls that were turned down by other companies have been renovated with the grid fixed ceiling.
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Applications/Examples of results
Music halls, multipurpose halls, atrium entrances, gymnasiums, etc. <Track Record> Kansai Airport Central Monitoring Room (Osaka) Fujieda City Citizen Hall Okabe Large Hall (Shizuoka) Sugiyama Jogakuen University Elementary School Gymnasium (Aichi) Tsuru City Uguisu Hall Large Hall & Small Hall (Yamanashi) Kusatsu City Amica Hall (Shiga) Kyoto Institute of Technology Center Hall & Foyer (Kyoto) Kamishihi Sansan Hall (Fukui) *This is the track record of member companies of the Seismic Ceiling Promotion Association.
Detailed information
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Grid fixed ceiling
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Company information
The Wilby Building Materials Division is a professional group specializing in sports facility construction and flooring finishing work. 【Building Materials Division】 ● Sports Facility Business: Centered in Hokuriku and Niigata, we engage in specialized construction related to sports facilities such as swimming pools and gymnasiums, as well as flooring work for various facilities. ● Building Sales Business: We provide high-value flooring products that are not available in conventional offerings, such as scratch-resistant flooring "Cattina" and natural wood composite flooring "Alpito." ● Good Floor Business: As the domestic importer of concrete chemical products from the U.S. company LATICRETE, we offer various concrete flooring solutions, including "Seal Hard." ● Environmental Business: We propose and sell installation services for products such as "Painted Insulation Material Gain," "Cool Roof," "Seismic Ceiling WILL-TEC Method," and "Nano Zone Coat." 【Construction Division】 We construct numerous low-cost steel frame buildings for logistics facilities such as distribution centers and warehouses, as well as commercial facilities like supermarkets, home centers, drugstores, and fashion malls throughout Japan. We provide consistent services tailored to customer needs, including land development, design, and comprehensive construction.