What is a steel beam? Steel beams, beams made of steel. Well, the use in life is also very common. For example, the crane beams in the workshops in our lives, the work platform beams, the floor beams in multi-storey buildings, the purlins in the roof structures, etc. all use steel beams. However, these seemingly simple steels are not simple, different structures, and different sizes of steel beams determine their different roles. Since we have to say what the size of steel beams is , we must first understand what steel beams are, what kind of steel beams are there, and the use of steel beams in our lives!
What is a steel beam
The first is very simple. It can be explained literally. The beam made of steel is called steel beam. At the same time, the steel girder is also known as the "Universal Beam" (English name) and is a long strip steel material with a section of I-shape. I-beam is divided into ordinary I-beam and light I-beam, H-beam three. The types of steel beams are also divided into type steel beams and composite beams.
Steel beam size
General Worker 20a:
Section height H=200mm;
Section width B=100mm;
Foil thickness tf=11.4mm;
Web thickness tw=7mm;
Cross section area A=3555mm2;
Inertia moment Ix=23690000mm4;
Inertia moment Iy=1579000mm4;
Section modulus Wx=236900mm3
Steel beam classification
Steel beam
Hot-rolled I-beams or channel steels are used (see hot-rolled section steels), and lightweight beams such as purlins can also be cold-formed Z-shaped steels and channel steels (see Cold-formed steels). The profiled steel beam is simple to process and inexpensive, but the section size of the profiled steel is limited by certain specifications. When the load and span are large, and the profile steel section cannot meet the requirements of strength, rigidity or stability, the composite beam is used.
2. Composite beams
Made of steel plate or steel welded or riveted. Due to the cost of riveting materials, often based on welding. The commonly used welded composite beams are the I-shaped section and the box-shaped section composed of the upper and lower flange plates and the web. The latter is more wasteful and the production process is more complicated, but the bending rigidity and the torsional rigidity are large. It is suitable for situations where there is lateral load and high torsional resistance or beam height is limited.
Steel beam price
The price of square steel beam is 20.00 yuan/piece. The square steel beam can save about 15% of the steel structure steel. When calculated according to the plastic theory, it can save 20%-40%. When calculated according to elasticity, the steel structure is under construction under steel beams. The steel consumption for temporary support is about 80% of temporary support. The steel structure reduces the cost by about 10%. Liang Gaoneng reduced by 10%-15%. With increased bending stiffness, deflection of the beam can be reduced by about 30%. Shock resistance, impact resistance, can reduce the impact factor of 20%. High cost performance.
Note: This price is for reference only! Due to geographical differences, of course, the price will be different. For more details on the prices, please refer to the local distributors!
Steel beam manufacturers
Jinzhong Steel Trading Company
Address: No. 101, Huitong North Road, Yuci District
Jinzhong Yixinyuan Steel Trade Co., Ltd.
Address: G108, Yuci District, Jinzhong City
Guangdong Zhejin Steel Co., Ltd.
Address: Block D4, Shanghai Oupu Steel Market, Shunde District, Foshan City
Steel beam installation quality requirements and processes
For the installation process of steel girders, we need to know the overall process flow, that is, construction preparation → measuring and releasing lines → steel girder installation → measuring and calibration → welding → inspection and acceptance
One of the important points to be noted in the installation and operation of steel girders is the installation sequence of the first girder and the second girder. Be sure to maintain the order of installation of interior, exterior, and top and bottom. Only in this way can it be installed naturally.
When the steel girder is installed, the main girder is lifted into position and aligned. This process can be preceded by a crowbar, and then the punch can be adjusted so that the relative position of the relevant component is relatively fixed. The next step is the placement of steel beams and related temporary fixing aspects. Before the steel beam is hoisted, the surface of the steel beam must be kept clean; the floating rusted connecting plate and the friction surface must be cleaned in time. Lifting the steel beam requires preparation for the already fitted connecting plate, at which point the bolts are already installed.
When the steel beam lifting adjustment is in place, pay attention to the horizontal position of the steel beam to ensure proper installation. Once the steel girder is in place, it is necessary to dispose of the connecting plate in time, and if it is found that the hole has a misaligned joint, it should be dealt with promptly. It is generally possible to adjust the cross-pitch with the punch and use the ordinary bolts for the temporary connection. In addition, the number of ordinary mounting bolts must be more than 30% of the total number of nodes, and at least two, according to the specification. When the steel beams in any frame are installed, measure the correction in time.
Editor's summary: In the designer's world, it is necessary to boldly and realistically imagine the responsibility for designing the perfect solution; but more importantly is the need for architects, steel beams, bricks, cement, etc. that require countless precision calculations. Their imaginary structure becomes a real existing object.
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