(1) a large number of steel sandwich quality issues that exist within the steel itself in the rolling process, has exceeded the national standards requirements, you can request sent to verify steel mills, steel mills or return in consultation with the replacement treatment; (2) if the number is less sandwich technology sector and the owners can seek advice, feedback to the mills, to take remedial measures on construction problems, according to the results of non-destructive testing, the use of the site in question gouging away with all over the depth of their own, and then with an equal strength welding material filled, after completion of the surface treatment, after a predetermined time for NDT inspection, while the same members sampled for physical and chemical testing, to meet the design specifications You can continue to use; (3) Under the supervision of the parts cut off the witness again to meet the conditions put on the plate, replaced parts for non-load-bearing and non-essential parts or use as an auxiliary steel structure design, completed After a predetermined time after the NDT inspection, make a record. Photovoltaic solar PV mounting bracket is a special bracket of solar photovoltaic systems in order to be placed, installation, fixing the solar panel design. PV mounting products at ground mounting system, flat roof mounting system, adjustable angle roof rack system, inclined roof rack system, column bracket system. In order to make the whole photovoltaic system to get the maximum power output, combined with geography, climate and solar resource conditions of the construction site, the solar modules toward certain steel items, arrangement and spacing fixed support structure, usually steel and aluminum alloy, or a mixture of both. Steel maintenance _ _ Peng Jian Zhongshan Steel Steel Ltd. of Dongguan City, Peng Jian provided by steel. Steel Co., Ltd., Dongguan City, Peng Jian (dgpengjian.cn) strong, credible, in Dongguan, Guangdong steel industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement Peng Jian innovative ideas will lead into the brilliant steel and you work for a better future!