[China Glass Network] 1. The curtain wall steel layout is not selected from hot dip galvanized or weather resistant layout steel Q235 or Q345. Extra Large Nitrile Gloves,Nitrile Mechanics Gloves,Safeguard Nitrile Gloves,Blue Nitrile Gloves Jiangsu Yijin Import and Export Trade Co., Ltd , https://www.dailysafecare.com
2. Regardless of the appearance of the steel or steel layout, the rust removal method, the rust removal level, the surface matching coating number and the total number of coating films, etc. of the underlying coatings are not well written. The rust removal level does not match the rust removal method during the project. The need for descaling and descaling quality is not met. The exterior layout of the steel layout should be hot dip galvanized or shot blasting. Try not to use rust and semi-mechanical rust removal.
3. The selection of protective coatings does not distinguish the level of external erosion effects. For example, indoor components are usually classified as weakly aggressive or non-erosive, and medium-sized anti-corrosive coatings can be used. Indoor swimming pools or outdoor gutters should be classified as moderately aggressive, except for table disposal. The hot-dip galvanizing or shot blasting should be used, and the coating should be made of high weather-resistant bottom and surface matching coatings. Stainless steel is recommended for outdoor gutter data.
4. Bolts, screws, nuts, etc., which are not written on the curtain wall, shall be qualified products of the standard manufacturer. The data shall be austenitic stainless steel or the surface shall be treated by hot dip galvanizing. The raw material statement, re-inspection statement and commodity of the steel shall be available. Certificate of conformity.
5. It is not stated that the silent steel members should be welded closed along the full length and ends.
Fourth, the question of curtain wall accounting 1. Curtain wall wind load accounting, "Glass curtain wall engineering skill standard" JGJ102-2003 (hereinafter referred to as the new standard), has been selected according to the "construction layout load standard" GB50009-2001, its gust coefficient βZ should be calculated according to the formula, not the original 2.25; wind The carrier type coefficient μS wall area is 1.2, and the corner area is 2.0, which is not 1.5. Some projects are still valued according to the old standard, and the wind load is too large.
2. The new standard rule glass and layout glue strength calculation does not consider the temperature effect, but many projects are still accounting for temperature stress.
3. The strength and deflection of the framed glass curtain wall, the full glass curtain wall, and the aluminum curtain wall panel are not considered to have a reduction factor η.
4. When calculating the deflection of curtain wall components, the new standard rules do not consider seismic loads and manipulate the original deflection value of 20mm.
(About aluminum alloy profiles), 15mm (on steel profiles); when calculating beam deflection, horizontal loads are separated from vertical loads and no deflection is combined. However, some projects are still being calculated according to the old standards.