久久久久久亚洲,精品国产乱码久久久久久浪潮,无码aⅴ精品一区二区三区,男女性杂交内射妇女BBWXZ

Spiral Duct Sales Hotline:0757-8679-7137

What should be paid attention to when making and installing the spiral duct support?

  • Hits: 1098

As we all know, the spiral air duct is now widely used in the interior of the building. Its main function is to have excellent ventilation and ventilation effect together with the internal and external ends of the building. In the process of spiral air duct installation, a bracket needs to be installed to support and assist. What should we pay attention to when making and installing the spiral air duct?




What should be paid attention to when making and installing the spiral duct support?

I. in the process of making the bracket, it is required to strictly follow the national standards, select the section steel specification specified in the drawing set, and it is not allowed to change it at will.

II. All bolt holes on the air duct support shall be drilled, and gas welding method shall not be used to open holes.

III. the blanking of hanger shall be accurate. In addition, there shall be no lap weld in the middle of hanger.

IV. when the cross section of spiral air duct is small, the air duct suspender can be fixed on the floor with expansion bolts. When the air duct is large, the drilling shall be carried out in a certain way.

V. before installing the support, the center line of the air duct shall pop up the wall, column and floor surface, and then pay attention to the horizontal position and standard height of the support, in order to ensure the levelness and plane center position of the installed air duct

Vi. before the installation of bracket, the exposed part shall be derusted and painted with antirust paint.

VII. For low air duct, in order to prevent cold bridge, the contact surface between air duct and support shall be padded with wood block or wood block.

VIII. When the steel members are pre arranged on the walls and columns, the position and elevation of the steel members shall be checked before the concrete pouring of civil works.

QQ
WEIXIN
">
WEIXIN
0757-86797137
">
TEL
欧美av丰满白嫩尤物| 日本在线一区二区| 少妇口述3p刺激经历| 91老熟女| 亚洲一区在线日韩在线深爱| 特黄特色三级在线观看| 一本大道久久东京热无码AV| 哦┅┅快┅┅用力啊┅┅人妻视频| 国产精品成人一区二区三区| 日韩一级黄色| 五月激情久久| 久久国产欧美| 亚洲人成在线观看网站不卡| 无码人妻精品一区二区三区9厂| 国产精品国产三级国产av| 日韩AV片无码一区二区不卡电影 | 中文WWW新版资源在线| 尤物麻豆AV在线| 屯门区| 香蕉av久久一区二区三区| 与岳乱lun第50部分| 啪啪网站| 国内久久| 精品淑女少妇av久久免费| 精品国产乱码久久久久久1区2区| 久久99精品久久久久久琪琪| 91精品一区二区三区在线观看| 年轻bbwbbw高潮| 欧美亚洲日本| 真人性做爰试看20分钟| 日本加勒比在线| 黑人与饥渴少妇在线| xxxxwww日本| 久久人妻系列| 日韩第一页| 中国精品偷偷拍| 九色国产精品入口| 精品亚洲| 亚洲天堂男人天堂| 伽师县| 国内精品国产三级国产AV|