Ordinary beam and light beam of the wing to the edge of the root cause of the gradual thinning, there is a certain point of view, the ordinary beam and light beam model with its waist-high cm number of Arabic numerals, abdomen plate, flange thickness and flange width of different 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 the high waist of 160 mm, leg width of 88 mm, 6 mm thick waist ordinary beam. / "Light 160 × 81 × 5", it means that the high waist of 160 mm, leg width of 81 mm, thick waist light beam 5 millimeters. Ordinary beam model specifications can also be used, said that waist-high models of a few centimeters, such as general working 16 #. The same beam waist high, if several different legs wide and thick waist, plus abc model the right to be different, such as general workers 32 # a, 32 # b, 32 # c and so on. Hot-rolled ordinary beam specifications for the 10-63 #. Hot-rolled ordinary beam specifications supplied by the agreement between the 12-55 #. Beam is divided into ordinary beam, light beam and H-beam three. Ordinary beam, light beam flange is variable section by a thick web portion, the outer thin; H-beam: HW HM HN HEA HEB HEM and other 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 beam beam, HW HM HN from the European standard, HEB German standard I-beam, which HW, HN beam has been widely used and produced in our country. HEA HEB HEM in many German plan would see, in the domestic market is still difficult to buy. In the domestic steel works, if you can use less steel and other specifications for welding splicing. And 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 roughly 1.33 ~ 1.75, mainly in steel used to make steel frame columns to withstand dynamic loads to do frame by frame beam; for example: device platform HN steel flange height and width ratio is greater than or equal to 2; the main purposes for the ordinary beam girder steel equivalent HN; ◆ work word steel, whether ordinary or light, because cross-sectional dimensions are relatively high, narrow, so the cross-sectional moment of inertia of two spindles quite different, therefore, generally only directly for 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 suitable, which it has significant limitations on the scope of application. ◆ H-beam cutting surface profile belongs to efficiently and economically (there are other cold-formed thin-walled steel, pressure plate, etc.), due to a reasonable cross-sectional shape, they can make steel more play performance, improve the carrying capacity. Unlike ordinary it is h-shaped steel flange was widened, and the inner and outer surfaces generally parallel, so that makes it easy to connect with high-strength bolts and other components. Constitute series reasonable size, complete model, ease of design choice. The scope of the ordinary I-beam, light beam, due to the cross-sectional dimensions are relatively high, narrow, so the cross-sectional moment of inertia of the two main sleeve quite different, therefore, generally only directly for their web plane within 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 suitable, which it has significant limitations on the scope of application. The use of beam shall be chosen according to the requirements of design drawings. Sized H-beam cutting plane belonging to efficient and economical type of steel (Others are cold-formed thin-walled steel, pressure plate, etc.), due to a reasonable cross-sectional shape, they can make steel more play to the effectiveness and improve the bearing capacity of the CD. Unlike ordinary beam it is H-beam flanges were widened, and inner and outer surfaces generally parallel, so that makes it easy to connect with high-strength bolts and other components. Constitutes a reasonable size, complete model, ease of design choice. In the structural design of the beam selection should be based on its mechanical properties, chemical properties, weldability, structure, size and other reasonable choice of beam for use. H-beam flange welding process are of equal thickness, there are rolling cross-section, but also by the composite section consisting of three plate welding. Ordinary beam are rolling cross-section, because the production process is poor, inner flange edge has a 1:10 slope. Rolled H-shaped steel beam with only a level different from the common roll, because of its wide flange with no inclination (or slope is very small), and thus should be added a set of vertical rolls simultaneously rolls, thus its rolling mill technology and equipment than the general complexity. China can produce the maximum rolling H beam height of 800mm, more than the combined section can be welded. H steel flange suitable for narrow beam or bending member, and wide flange h Type