Beam ordinary beam and light beam to the edge of the wing root cause gradual thinning, there is a certain point of view, the ordinary beam and light beam model with its waist-high cm number of digits to said different web and flange thickness and flange width specifications to waist high (h) × leg width (b) × waist thick (d) of the coin number, such as "general workers 160 × 88 × 6", it means that waist height 160 mm, width 88 mm legs, waist thick as an ordinary beam of 6 mm. / "Light 160 × 81 × 5", it means that the high waist of 160 mm, a width of 81 mm legs, waist and 5 mm thick beam of light. Ordinary beam model specifications can also be said that the model represents a few centimeters high waist, such as general workers 16 #. The same beam waist high, if several different legs wide and thick waist, plus abc in the model to the right to be different, such as general workers 32 # a, 32 # b, 32 # c and so on. Hot-rolled ordinary beam specifications for 10-63 #. Hot-rolled ordinary beam size upon the agreement between the supply of 12-55 #. Beam is divided into ordinary beam, light beam and H-beam three. Ordinary beam, light beam flange is variable cross-section by a thick web portion, the outer thin; H-beam: HW HM HN HEA HEB HEM such as I-beam flange is equal section ordinary beam, light word Steel has become the national standard, ordinary 10 # I-beam is equivalent to I100 internationally (such as 10 # channel also corresponds to channel U100) (because the standard implementation of the different countries, resulting in their specifications have subtle differences) H type also called wide-flange steel beam, HW HM HN from European standards, HEB is the German standard I-beam, which HW, HN beam has been widely used and produced in our country. HEA HEB HEM on many German plan would see, in the domestic market is still very difficult to buy. Steel works in the country, if you can use less steel welding and other specifications splicing. The large, then, consider the use of the mechanical properties generally comparable HW, HN steel instead. HW beam is mainly used for reinforced concrete frame structure column steel core columns, also known as King of the steel column; mainly used in steel column HM steel flange height and width ratio of approximately 1.33 ~ 1.75, mainly in steel used to make steel frame columns frame structure to withstand dynamic loads to do with the frame beam; for example: device platform HN steel flange height and width ratio greater than or equal to 2; I-beam is mainly used for general purposes the equivalent beam HN steel; ◆ whether the word is a common type of steel or lightweight, due to cross-sectional dimensions are relatively high, narrow, so the cross-sectional moment of inertia of two spindles quite different, therefore, generally only used directly in their web plane flexural members will form a lattice or force its members. For axial compression members or perpendicular to the plane of the web as well as curved components are not appropriate, which it has significant limitations on the scope of application. ◆ H-beam are efficient and economical cutting surface profiles (there are other cold-formed steel, pressure plate, etc.), due to a reasonable cross-section shape, they can make steel more play performance, improve the carrying capacity. Unlike ordinary worker is h-shaped steel flanges were widening, and the inner and outer surfaces generally parallel, so that makes it easy to connect with high strength bolts and other components. Constitutes a reasonable size series, complete model, ease of design choice. Scope