Structure and properties of solid and dynamic load tests measuring 4.1 for large, complex steel structures can be carried out in situ non-destructive real load testing, inspection and structural properties directly. Structure and properties of solid charge according to the provisions of this standard test conducted in Appendix H. Loading coefficients and determine the principles according to the provisions of Appendix H.2 determine steel canopy can also be adjusted according to specific circumstances. When the bearing capacity of 4.2 pairs of structures or members of doubt, can be a prototype or full scale model load test. Tests should be entrusted to specialized institutions have sufficient equipment capabilities were. Should develop a detailed test program before the test, including test purpose, the specimen selection or production, loading device, measuring points and test equipment, procedures, and test results of the assessment methods to load. Appendix H to develop test programs can be steel, and shall be subject to the consent of the parties before the test. 4.3 For large and important new steel structure system, should the actual structural dynamic tests to determine the structure of dynamic parameters such as vibration periods. Dynamic test should comply with the provisions of Appendix E of this standard. 4.4 stress steel rods, the choice of resistance strain gauges or other effective method for testing according to the actual conditions. Steel Development: should focus on three major areas of concern should be the relevant national authorities in accordance with the development of industry development steel construction, offshore oil engineering equipment, steel homes, steel bridges and other three areas, if taken seriously, and policies to encourage , can achieve the goal of doubling the industry. Offshore oil production in 2015 to reach 100 million tons, marine engineering equipment business goal is to provide a lot of equipment for 1500 m - 3000 m deep sea mining, industry must improve the level and scale; steel residential line with environmental protection, energy saving and reduction row and cycle of economic policy, industrialization, standardization of steel residential products have broad and unlimited market space; 590,000 national highway bridge steel bridge less than 1%, the rapid development of the railway system, the new line to the bridge on behalf of the road, 80 % are prestressed concrete bridge. The steel bridge in Japan accounted for 41 percent, the United States accounted for 33%, we can see that China's steel bridge market demand and industrial development there is a great gap between the developed countries. Steel construction program, Peng Jian steel (certified), provided by the Dongguan City, Guangdong Steel Steel Ltd. Peng Jian. Steel Co., Ltd., Dongguan City, Peng Jian (dgpengjian.cn) is Dongguan, steel leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Peng leader in steel construction with the staff warmly welcome all inquiries negotiations to create Peng build a better future for steel.