【正文】
in identification of steel structure coating quality and coating thickness is an important parameter, therefore determination of coating thickness is an important project. Coating thickness measurement generally magic thickness tester is used to test, have the product at home and abroad. Domestic magic coating thickness gauge material testing in tianjin factory of the product, name is QCC type A magic thickness gauge. With magic thickness gauge, adjusted the instruments, make it has normal work performance. Must first determine the measurement range, the first leg of 0 ~ 50 microns, the second leg of 0 ~ 500 microns. When measured in the probe contact coating to be tested. Determination of first to remove the coating surface dirt and oil, in case influence precision. When testing coating according to the specific circumstances to determine, first, through the instrument to determine presence of coating, because coating under the action of a longterm environmental damage until disappear coating, coating or not is an important parameter of coating. Because the presence of residual coating is an important structure corrosion level line, is also a permanent evaluation of important boundaries. (3) the steel structure roof deflection measurement General span steel roof truss is larger, such as 21, 24, 30 m), measuring the deflection of more difficult, have to use a lot of force to pull the wire, and wire request has a certain tensile strength. When measuring the key to seize steel wire straightening, the measurements are accurate. At the same time, it is better to have a pleted record, the original steel roof truss ever an arch or deflection value after construction. The two values was determined to determine roof stress and deflection under load values. Often due to construction installation, of course, there is the arch, arch after still have after use, the measured deflection value is negative deflection, as a result, the measured values must indicate the positive and negative value. When the deflection is measured to determine best protection, namely, general in the cross point is determined. Such as the clinometer determination of drawn steel wire in case of obstacles in the middle. Such as Angle steel, wire, etc., must be in advance expenditure point on both ends right now, in order to make steel wire straightening. Advance expenditure point, measure the deflection values must be minus the average of the two fulcrum height, is39。 Welding ball is must be the diameter of the pipe welding according to the standard, then the tensile pressive tests are carried out。 Quality inspection。Analyses to detect the steel structure of building material Abstract: the article briefly introduces the construction steel structure material properties and detection methods, focusing on the steel structure detection method and quality detection method in this paper, the analysis, to ensure the quality of light steel structure, steel structure material performance into full play. Key words: steel structure inspection。 Steel structural materials。 Quality evaluation Steel structure detection in individual ascension detection technology at the same time, pay attention to the development a