Ping Ya Industry and Trade of steel doors and accessories material requirements: (3) mounted on the steel fire door locks, hinges, latches and other metal parts is not lower than the melting temperature of 950 ℃. (4) mounted on a fire door hinge, and may not use two-way spring, single door closers should be located. There must be room (5) double doors covered slit plate, and the installation of door closers and order, etc. (except fire doors normally closed). (6) should be established door seal groove. Tank should be fitted into the seal groove by non-combustible material. Ltd. Yongkang Ya Ping "technology to create quality, service embodies the perfect 'for the purpose, and always adhere to the" people-oriented Which is good quality wood doors, wood doors factory direct quality excellence, beyond the self-innovation' entrepreneurial spirit of quality wood door, adhere to the characteristics of high-quality wood doors wholesalers, professional road, based on the market continuously to improve product quality and service plant, we continue to meet our customers' needs and work together with our customers a sincere cooperation, for constructing a harmonious society and achieve win-win situation and work! My company operating in good faith, timely delivery! welcome friends from all over the world to work together! wholesaler of high quality solid wood doors, Jinhua quality wood doors, Trade and Industry Ya Ya modeling diverse levels by Yongkang Industry and Trade Limited. Yongkang Ya Ping Ltd. (www.ykpygm.com/) strong, credible, Zhejiang Jinhua doors industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve the level of innovative ideas will lead into the elegant splendor of Industry and Trade and you work for a better future!