美国黄色片一区二区三区,欧美韩日亚洲影视在线视频,国产人妻大战黑人20p,免费无码又爽又刺激高潮的视频免费 ,国产在线丝袜精品一区免费,国禁国产you女视频网站,少女たちよ在线观看动漫4,免费啪啪视频一区

        What are the key points of construction for fireproof glass doors

        2020-03-27 2148

        Construction requirements of fireproof glass door

        (1) fire doors are divided into two types: wooden and steel. The products must meet the fire performance required by the planning, and the production unit products with production license must be approved by the industrial safety department.

        All metal components shall be arc welded, and the weld shall be free of defects such as unmelted, incomplete penetration, porosity, crack and burn through. After the steel framework is straight, it shall conform to the standard regulations, the products shall have factory certificate, and check with the drawings to see whether it conforms to the planning regulations.

        (2) the fire door device shall be flush with the wall in the opening direction of the door leaf.

        (3) the installation of wooden fireproof door frame and leaf is the same as that of wooden door frame and leaf.

        防火玻璃門

        (4) the fireproof door shall be about 20mm smaller than the opening size of the device. The door frame shall be firmly connected with the wall body. The open space shall be filled with heat-resistant materials. The device shall be flat and straight to prevent sawing. If there is unavoidable sawing, the sawing surface shall be coated with fireproof paint for one time. After the hardware part of the device is cut, the cutting part shall be coated with fireproof paint for one time. The expansion bolt shall be used for the connection between the fireproof door and the wall. If wood brick is used, fireproof treatment shall be carried out, Fire doors shall be equipped with door closers.

        (5) when the fireproof door leaf of reinforced concrete door frame is installed in the cutting opening of door frame, the gap between the leaf and the frame shall be adjusted to make the door leaf straight. The upper and lower door shafts shall be on the same vertical line. When they are firmly welded with the embedded iron of the door frame, the position shall be calibrated to prevent displacement and deformation. The position of the upper and lower pins, latches and handles shall be, and then welded firmly after trial assembly. After the completion of the device, conduct repeated opening and closing tests. After passing the inspection, paint the door frame and apply fireproof paint on hardware parts.

        Article source: fireproof glass door http://m.wan-xin.net/


        主站蜘蛛池模板: 国产成人精品一区二免费网站| 日本xxxx色视频在线观看| 99久久久69精品一区二区三区| 亚洲av永久青草无码精品| 97人妻无码免费专区| 无码精品a∨在线观看十八禁| 久久精品丝袜高跟鞋| 伊在人亞洲香蕉精品區| 人妻网站成熟人妻VA网站| 国产情侣一区二区三区| 色伦专区97中文字幕| 国产午夜激无码AV毛片不卡| 亚洲中文字幕av一区| 激情啪啪精品一区二区| 精品偷拍一区二区三区| 国产区人妖精品人妖精品视频| 丝袜美腿一区二区在线观看| 亚洲av一二三又爽又爽又色| 车致| 欧美日韩高清一本大道免费 | 天天射天天操天天综合网| 国产一区二区内射最近人| 色优网久久国产精品| 毛片av中文字幕一区二区| 道孚县| 福利网在线| 亚洲av激情一区二区| 中文字幕在线一区乱码| 亚洲成AV人国产毛片| 久久久亚洲女精品aa| 亚洲欧美日韩精品久久亚洲区色播 | 国产va精品免费观看| 国产V日韩V亚洲欧美久久| 人妻少妇看A偷人无码电影| 97超级碰碰碰久久久观看 | 日日碰狠狠躁久久躁蜜桃| 久久免费少妇高潮免费| 关岭| 亚洲成精品动漫久久精久| 亚洲国产欧美日韩在线人成| 亚洲欧美人成视频一区在线|