Fire-resistant and airtight ceiling inspection opening [60-minute semi-fire-resistant structure, compatible with reinforced ceilings]
Ceiling inspection openings compatible with 60-minute semi-fire-resistant structures and reinforced ceilings that do not pose fire safety issues even when installed on fireproof covering lines [Special column now available].
■Ensuring the Continuity of Fireproof Coating The fireproof performance of our conventional products (made of aluminum) is approximately 28 minutes (based on our test values), so it is conceivable that continuity of fireproof coating cannot be ensured in quasi-fireproof structures or reinforced ceilings. By using fireproof ceiling inspection openings, continuity of fireproof coating can be secured. ■Simplification of Construction To ensure the continuity of fireproof coating, there are cases where various methods are employed, such as installing a site-manufactured box-shaped fireproof coating above the ceiling inspection opening; however, these measures can become a burden on the site. This product eliminates the need for a box-shaped fireproof coating, leading to a reduction in on-site construction effort. ■Slimming Down the Visible Width for Aesthetic Appeal Compared to products that comply with 45-minute quasi-fireproof structures, the visible width has been narrowed, and the base material has been painted for a cleaner appearance. ■Consideration for Safety During Opening, Closing, and Inspections Since ceiling materials become heavier in 60-minute quasi-fireproof structures or reinforced ceilings, a fall prevention chain is standardly equipped to prevent the lid from opening too forcefully during inspections. ■Special Column Published by Mr. Noboru Yasui, Representative of Sakura Design Group, First-Class Architect Office "What are the important points regarding fireproof coating required for quasi-fireproof and fireproof buildings?" ↓Click the related link↓
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Please check the "corresponding announcement specifications" listed in the catalog and use this product. *The fire resistance performance test is based on our company's testing. This product is not certified. It is a product that has demonstrated performance equivalent to 60 minutes of semi-fire resistance. <Main target buildings> 〇 Wooden three-story apartment buildings 〇 Wooden three-story schools 〇 Wooden non-residential buildings 〇 Properties with reinforced ceilings *Please use in accordance with various laws and regulations. 【Specifications】 Color: White Material: Frame/SGCC (hot-dip galvanized steel sheet) thermal expansion sheet Ceiling opening dimensions: 457×457mm Ceiling material cutting dimensions: 434×434mm Substrate material cross-section dimensions: 30×35mm or more Packaging: 1 unit/case List price: 29,800 yen/unit (excluding tax) Accessories: 1 bag of mounting screws (φ3.8×38mm, 8 pieces)
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We listen to the voices from the field and develop and manufacture with free thinking. That is the motto of Joto's manufacturing. Joto's building materials are described as "unique," which means not just "interesting" but in its original sense of "one-of-a-kind" and "unparalleled." We believe that our value lies in creating distinctive and unique products that cannot be replicated by others, utilizing our original ideas and technologies, and contributing to the housing industry. To make Japanese homes last longer and ensure that people can live with peace of mind for years to come. As a housing material manufacturer, Joto will continue to challenge itself with "unique" manufacturing.