Fireproof and high airtight ceiling inspection opening [45-minute semi-fireproof structure compatible product]
SPC-F4545-J45
Ceiling inspection openings with a 45-minute semi-fire-resistant structure that do not pose a fire safety issue 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 (according to our test values), so it is possible that continuity of fireproof coating cannot be ensured in quasi-fireproof structures or reinforced ceilings. By using a fireproof ceiling inspection opening, 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 providing a site-manufactured box-shaped fireproof coating above the ceiling inspection opening; however, the measures for fireproof coating have become a burden on the site. This product eliminates the need for a box-shaped fireproof coating, leading to a reduction in construction labor on site. ■Ensuring High Airtightness A recess is provided to maintain the elasticity of the airtight material. It has high airtight performance equivalent to JIS A 4706 (sash) airtightness grade A4 (according to our test values). ■Special Column Published by Noboru Yasui, Representative of Sakura Design Group First-Class Architect Office "What are the precautions for fireproof coating required in quasi-fireproof and fireproof buildings?" ↓Click the related link↓
Inquire About This Product
basic information
When using in a 45-minute fire-resistant structure, please use ceiling materials that comply with the specifications of the notification (*). * Notification No. 1358, Article 3, Item 3 of the Ministry of Construction, Heisei 12. The fire performance test results are based on our company's testing. This product is not certified. <Main target buildings> 〇 Wooden single-family houses 〇 Wooden two-story apartment buildings 〇 Wooden non-residential buildings * Please use in accordance with various laws and regulations. 【Specifications】 Color: White Material: Decorative frame: ABS, Frame: SGCC (hot-dip galvanized steel sheet) thermal expansion sheet Ceiling opening dimensions: 457×457mm Ceiling material cutting dimensions: 418×418mm Substrate material cross-section dimensions: 45×45mm or more Packaging: 1 unit/case Regular price: 21,600 yen/unit (excluding tax) Accessories: Installation screws 1 bag (φ3.8×38mm, 8 pieces)
Price range
Delivery Time
Applications/Examples of results
For more details, please refer to the PDF document or feel free to contact us.
catalog（2）
Download All Catalogs
Company information
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 "unmatched." By utilizing our original ideas and technologies, we create distinctive and unparalleled products that cannot be replicated by other companies, and we believe that contributing to the housing industry is our value. To make Japanese homes last longer and to ensure that people can live with peace of mind for years to come, Joto will continue to challenge itself with "unique" manufacturing as a housing material manufacturer.