Steel truss floor plate of steel structure Truss floor bearing plate with steel bars as the upper chord, lower chord and belly bar, through resistance spot welding connected truss is called steel truss. The composite bearing plate, which is connected to the steel truss and the bottom plate through resistance spot welding, is called the steel truss floor plate. The mechanized production of steel truss floor plate is beneficial to uniform spacing of steel bars, uniform thickness of concrete protective layer, and improve the construction quality of floor plate. Prefabricated steel truss floor bearing plate can significantly reduce the amount of on-site steel binding, accelerate the construction progress, increase the construction safety guarantee, and realize civilized construction. Prefabricated templates and connectors are easy to disassemble and assemble, can be reused many times, save steel, and meet the requirements of national energy conservation and environmental protection. Product details TDV, TDM type steel truss floor bearing plate is a combination of steel truss which is processed into steel truss in the factory, and welded into the steel truss and galvanized steel plate bottom die. With many advantages such as "economy, convenience, safety and reliability", it is a floor bearing plate product that can enhance customer value. After more than ten years of development, it has been widely used in the floor or roof structure of prefabricated steel structure buildings and concrete buildings. TDD assembly detachable steel truss floor bearing plate is a composite formwork which processes the stressed steel bars in the floor plate into steel truss in the factory, and connects the steel truss with the formwork through plastic fasteners and self-tapping nails. After the concrete has reached the design strength, the bottom mold is removed, and the putty or paint is directly plastered to form the bottom effect consistent with the cast-in-place reinforced concrete floor.
Frame steel structure house Frame steel structure house refers to a house composed of beams and columns connected with steel bars to form a load-bearing system structure. Its main advantages are: flexible space separation, light weight, saving materials; It has the advantage that it can be more flexible with the layout of the building plane, and is conducive to the arrangement of the building structure that needs a larger space; The beam and column components of the frame structure are easy to be standardized and customized, and it is easy to adopt the integrated structure to shorten the construction period. Application Frame steel structure is often used in multi-storey, high-rise and super high-rise, long-span buildings, such as schools, hospitals, office buildings, dormitories, automobile 4S shops, exhibition halls, comprehensive exhibition halls, commercial complexes and so on.
Five installation techniques for steel structures
1. Positioning measurement According to the design data, the horizontal elevation, axis and column spacing of the foundation are remeasured. The top surface of the foundation is marked with a cross line of two axes, which is used as the positioning basis of the installation column. 2. Install the column In order to eliminate the influence of the error in the manufacturing of the column length on the column elevation, before hoisting, 1m is measured from the bull leg parallel downward as the section of the theoretical elevation, marked with obvious marks, and used as the benchmark for adjusting the column elevation. On the upper surface of the bottom plate of the column, mark the cross line of the vertical and horizontal axis through the center of the column, which is used as the reference for the installation and positioning of the column. When installing the cross lines on the column and on the foundation, use a level to correct the column elevation according to the theoretical elevation mark on the column, then use a cushion block to cushion the column, and tighten the anchor screws. Then use two theodolites to correct the vertical degree of the column from the two axis directions, and use double nuts to tighten the bolts after meeting the requirements. For the columns of single unstable structures, temporary protection measures can be taken with the aid of air reinforcement cables. For columns designed with intercolumn supports, you can install intercolumn supports to enhance structural stability. 3. Crane beam installation Before the installation of the crane beam, it should be checked, and it can be installed when the deformation is not exceeded. After the single piece of crane beam is hoisted into place, it should be bolted to the bull leg in time, and the connecting plate between the upper edge of the beam and the column should be connected, measured and adjusted with a level and warp meter, and the bolts should be tightened after meeting the requirements. 4. Roof beam installation The roof beam should be inspected before assembling on the ground. When the deformation of the component is not excessive, the friction surface of the high-strength bolt connection is free of sand and other debris, and it is confirmed that the friction surface is smooth and dry, it can be assembled on the ground. During assembly, oil-free sleepers are used to cushion the components, and wooden bars are used to support both sides of the components to enhance stability. The assembly of the roof beam of the steel structure house takes the two columns as a unit, and the unit should be inspected after splicing: the straightness of the beam; Spacing dimensions of bolt holes connected with other components (such as columns). Tighten the high-strength bolt after the adjustment test meets the requirements. 5. Install accessories Roof purlins and wall purlins are installed simultaneously. Purlin before installation, check the deformation of the component, such as excessive treatment, remove the surface of the component oil, sand and so on. Several purlins are hoisted together as a group, and the purlin slope is checked after a span is installed. It is required that the straightness of the purlin be controlled within the allowable deviation range, otherwise the connection bolt (plus pad if necessary) is adjusted.
Steel structure 9 features 1. Energy saving and environmental protection products with high residual value can be recycled 100% 2. Strong bearing capacity High strength material, strong structural bearing capacity node structure is simple 3. Excellent seismic performance At present, the best structural form of seismic resistance in building structures 4. Large span and flexible spatial arrangement can maximize the free combination space utilization of different spans and column distances 5. High degree of factory components 100% factory 6. Transport is convenient for free transfer of trucks 7. Install easy bolts to secure the connection 8. The construction period of short components and accessories in the factory, the site is only assembled 9. The assembly rate of Class A prefabricated building is much higher than 91%, which belongs to class AAA prefabricated building
Corrosion prevention and surface coating
1. Shot peening and rust removal + epoxy zinc-rich primer + epoxy iron cloud paint + polyurethane paint 2. Shot peening and rust removal + epoxy zinc-rich primer + epoxy iron cloud paint + chlorinated rubber top paint (chloro-sulfonated polyethylene) 3. Shot peening and rust removal + epoxy zinc-rich primer + epoxy iron cloud paint + (silicone modified polyurethane paint, silicone modified acrylic paint) Fluorocarbon paint) Note: 1. Pay attention to the positioning of anchor bolts during construction. 2. Repeatedly compound the axis positioning and perpendicularity of each steel column 3. Processing of connection joints between steel column and steel beam or tie rod 4 roof plate installation lap, fixed, etc. other steel structure buildings : In addition to making a reasonable choice according to the characteristics of steel structure, the application scope of steel structure must also be comprehensively considered in accordance with China's national conditions. At present, the application of steel structure in industrial and civil buildings in China is roughly as follows: 1, heavy plant structure The steel skeleton is often used in workshops where the lifting weight of the crane is large or its work is heavy. Such as metallurgical plant of open hearth, converter workshop, mixing furnace workshop, priming workshop; Heavy machinery factory casting workshop, hydraulic press workshop, forging workshop, etc. In recent years, with the large number of applications of grid structure, steel structure is also used in general industrial workshops. 2. Large span structure Such as aircraft assembly workshop, hangar, dry coal shed, Great hall, gymnasium, exhibition hall, etc., all need large-span structure. Its structural system can be grid, suspension, arch and frame, etc. 3. Tower and mast structure Including the mast structure of the tower, such as TV tower, microwave tower, power transmission tower, drilling tower, environmental and atmospheric monitoring tower, radio antenna mast, broadcast mast and so on. 4, multi-storey, high-rise and super high-rise buildings The skeleton of multi-storey and high-rise buildings can be made of steel structure. Multi-storey frames in industrial buildings and high-rise or super high-rise buildings such as hotels and restaurants should adopt frame structure system, frame support system, frame shear wall system. In recent years, steel structure has been gradually developed in this field. (5) Structure subjected to vibration load and earthquake action In the workshop with a large forging hammer, the direct power of the skeleton is not large, but the indirect vibration is extremely strong, and the steel structure can be used. Steel structure is also suitable for structures with high earthquake resistance requirements. 6, plate shell structure Such as large oil depot, oil tank, gas depot, blast furnace, hot blast stove, funnel, chimney, water tower and various pipelines. 7. Other structures Such as trestle, pipeline support, derrick and offshore oil platform. 8, removable or movable structure Commercial, tourism and construction sites for mobile houses, mostly light steel structure, and connected with bolts or fasteners.
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