Hot-rolled H-beam

Hot-rolled H-beam is an economical and efficient section steel with a cross-sectional shape similar to the English letter "H". It is formed by rolling steel billets through a rolling mill at high temperatures.

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Hot-rolled H-beam

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Details Introduction

Hot-rolled H-beam is an economical and efficient section steel with a cross-sectional shape similar to the English letter "H". It is made by rolling steel billets through a rolling mill at high temperatures.

Classification According to the ratio of flange width to height, it can be divided into three types: wide flange H-beam (HW), medium flange H-beam (HM), and narrow flange H-beam (HN). Among them, the height and flange width of HW H-beams are basically equal, mainly used for steel core columns in reinforced concrete frame structures, and mainly used for columns in steel structures; the height and flange width ratio of HM H-beams is approximately 1.33-1.75, commonly used as steel frame columns in steel structures, and can also be used as frame beams in frame structures bearing dynamic loads; the height and flange width ratio of HN H-beams is greater than or equal to 2, mainly used for beams.

Features

High structural strength : Compared with I-beams, it has a larger section modulus, which can save 10%-15% of metal under the same load-bearing conditions.
Flexible design style : When the beam height is the same, the bay of the steel structure can be 50% larger than that of the concrete structure, making the building layout more flexible.
Light structural weight : Compared with the self-weight of concrete structures, it is lighter, which can reduce the foundation treatment requirements of building structures, simplify construction, and reduce costs.
Good seismic performance : Steel structures mainly made of hot-rolled H-beams have good plasticity and flexibility, high structural stability, and are suitable for building structures that bear large vibration and impact loads. They have strong resistance to natural disasters and perform well in building structures in multi-earthquake zones.
Increase usable area : Compared with concrete structures, the cross-sectional area of steel structure columns is small, which can increase the effective usable area of the building by 4%-6%.
Low production cost : Compared with welded H-beams, it can significantly save labor and materials, reduce the consumption of raw materials, energy, and labor, has low residual stress, and has good appearance and surface quality.
Convenient construction : It is easy to machine, connect and install structures, and it is also easy to dismantle and reuse. The construction speed of steel structures using hot-rolled H-beams is about 2-3 times that of concrete structures, and the capital turnover rate is doubled.
Excellent environmental performance : Compared with concrete, dry construction can be adopted, which produces less noise and dust; the amount of soil taken for foundation construction is small, and the damage to land resources is small; after the service life of the building structure expires, the amount of solid waste generated by demolition is small, and the recovery value of waste steel resources is high.

Material and specifications

Material : The main materials are Q235B, SM490, SS400, Q345, Q345B, etc.
Specifications : Hot-rolled H-beams have various specifications and models. Their external dimensions mainly include parameters such as width, height, flange thickness, and web thickness. The requirements for these dimensions are clearly specified in national standards and can be selected and designed according to specific engineering needs.

Application areas

Construction field : Widely used in beams and columns in steel structures for industrial and civil buildings, such as factory buildings, frame structures for high-rise buildings, etc., and can also be used for stairs, roof trusses, load-bearing walls, etc.
Bridge field : It can be used for crossbeams, supports, etc. in bridge structures and is a commonly used material for large-span steel bridge components.
Mechanical manufacturing field : Commonly used for supporting structures of mechanical equipment and processing of metal components, such as the base and supports of large equipment.
Mining engineering field : Can be used for mine support in mining engineering, etc., and can withstand complex underground stress environments.
Other areas : It can also be applied to industrial equipment structures in petrochemical and electric power industries, frame structures for shipbuilding, main beam supports for trains and automobiles, port conveyor belts, and highway barrier supports, etc. Application in the photovoltaic industry
Photovoltaic support : It is the main application field of hot-rolled H-beams in the photovoltaic industry. Whether it is a large-scale ground-based centralized photovoltaic power station or a distributed photovoltaic power generation project, such as rooftop photovoltaic, fish-light complementary, and agricultural-light complementary projects, the support system often uses hot-rolled H-beams. For example, Trina Tracker used hot-rolled H-beams instead of the high-frequency welded H-beams commonly used in the industry for the columns in the Dongying Huiyang 400MW fish-light complementary project to ensure that the tracking bracket can operate safely for 25 years.
Other structures of photovoltaic power stations : In photovoltaic power stations, in addition to the supports that directly support photovoltaic modules, some auxiliary structures such as the building structures of substations and power distribution rooms, as well as the supports used to fix cable trays, pipelines, and other facilities, may also use hot-rolled H-beams.

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