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I-steel beam (also known as English name I Beam), is the section shape of strip steel i-beam.I-steel divides ordinary I-beam and light I-beam, H type steel three. Is the type of groove shaped steel section shape.
I-steel beam (also known as English name I Beam), is an H-shaped steel section. I-steeldivides ordinary I-beam and light I-beam, H type steel three. The I-shaped steel is widely used in various building structures, bridges, vehicles, bracket, machinery etc..
The reason of ordinary I-beam wing root and light I-beam to the edge of the progressively thinner, has a certain angle, the ordinary I-beam and light I-beam model is the Arabia digitalwith the waist high cm number to represent, web, flange thickness and width of flange to the different specifications to waist high (H) x width (leg b) * waist thickness (d) without number representation, such as "general 160 x 88 x 6", namely said waist high of 160 mm 88 mm in width, legs, waist thickness of 6 mm is ordinary i-beam. / "light 160 x 81 x 5", namely said waistheight 160 mm, width of 81 mm legs, light I-beam waist thickness is 5 mm. Ordinary I-beamspecifications are available models said, type representation of waist high cm, such asgeneral 16#. Waist high same I-steel, if there are several different wide legs and waist thick,need to add a B C to be the difference in the types of the right, such as general 32#a, 32#b,32#c etc.. Hot rolled ordinary I-beam specifications for 10-63#. Hot rolled ordinary I-beamspecifications of both sides of supply and demand supply for 12-55# protocol.
The basic difference
I-beam are divided into ordinary I-beam, light I-beam and H type steel three.
Ordinary I-beam, light I-beam flanges on the web is variable cross section of thick, outer thin;H type steel: HW HM HN HEA HEB flange HEM I-beam is uniform
Ordinary I-beam, light I-beam has formed the national standard, the common 10# I-beamequivalent to the international I100 (such as the 10# channel also equivalent to channel(U100) for countries to implement different standards, resulting in subtle differences in their specifications)
H sections are also called the wide flange steel, HW HM HN derived from the European standard, HEB is the German standard I-beam, where HW, HN I-steel has been widely used in our country and production. HEA HEB HEM seen in many German design will, in the domestic market is also very difficult to buy. In the domestic steel structure engineering, if less, you can use the other specifications of steel plate welding assembled. And a large quantity of words,usually consider the use of mechanical properties and equivalent HW, HN type steel instead of.
HW I-beam is mainly used for reinforced concrete frame column steel column, also known asreinforced steel column; in the steel structure is mainly used for the column
HM type steel height and width of flange is roughly 1.33~~1.75 used for steel frame columnsin frame structure under dynamic load is used for the main frame beam in steel structure; for example: equipment platform
HN type steel height and flange width ratio is greater than or equal to 2; mainly used for beam
Use ordinary I-beam equivalent to HN steel;
The I-shaped steel whether ordinary or light, because the section size are relatively high,narrow, so the moment of inertia of the cross-section of two spindle difference, therefore, can only be used directly in the web plane bending component or its component lattice stress components. The axial compression member or in the perpendicular to the web plane and curved components are not used, thus in their application range is limited.
The H steel is efficient and economic cutting surface profile (there are other cold-formed steel, steel etc.), owing to the section shape is reasonable, they can make the steel higher effectiveness, improve the bearing capacity. Different from the ordinary I-shaped flange type H steel was widened, and the internal and external surface is usually parallel, which can facilitate the connection with high strength bolts and other components. Its size to form a series of reasonable, model complete, easy to use design.
The scope of application
Ordinary I-beam, light I-beam, because the section size are relatively high, narrow, so themoment of inertia of the cross-section of two main sleeve difference, thus in their applicationrange is limited. The I-steel should be based on the requirements of design drawings for choice.
The size design
H steel is efficient and economic cutting surface of steel (there are other cold-formed steel,steel etc.), owing to the section shape is reasonable, they can make the steel higher effectiveness, improve load ability. Different from the ordinary I-beam is flange type H steelwas widened, and the inner and the outer surface is usually parallel, which can facilitate theconnection with high strength bolts and other components. The composition of a reasonablesize, model complete, easy to use design.
In structure design, selection of I-beam should be based on its mechanical properties,chemical properties, weldability, structure size and the reasonable choice of the I-beam touse.
Flange type H steel are of equal thickness, a rolling section, there are composite section is composed of 3 blocks of plate welding composition. Ordinary I-beam are rolling section,because of the production process is poor, the flange edge 1:10 slope. H type steel rolling is different from ordinary I-beam with only one set of horizontal roll, because of its wide flangeand no inclination (or slope is very small), so it will be a group of vertical roll at the same timerolling, therefore, the rolling technology and equipment than the conventional mill complex.The maximum rolling H steel of domestic production can be the height of 800mm, more thanonly welding composite section.
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