Light steel structure
Fasteners for steel structural members include screws, nails, rivets, bolts, fasteners, etc.. The force components (screws with self drilling screws and self tapping screw connection), self drilling tapping screws for connecting 0.84mm thick steel plate above the tapping screw only for the connection between the gypsum board structure of sheet or plate thickness below 0.84mm, the commonly used self drilling screws or screws specifications only 3 ~ 5 a. In the secondary part of the structure, the nail can be used, such as a nail, a rivet or a fastener, etc. the fastener connection is also used to form a combined section. Light steel floor or wall connected by anchor bolt and masonry or concrete foundation, common nails for connecting components and wooden beams.
The floor from dense beam and floor, with edge beam in beam end caps, floor beam in the wall of the support, there must be enough supporting length. When the span of the floor beam exceeds 3.5m, it should be taken to strengthen the lateral stability of the beam. When the openings in the floor when the floor should be set around the edge beam. The floor must be reliably connected with concrete foundation, wooden beam or load-bearing walls. The floor and the components of strength, stiffness, stability and vibration of the floor should meet the design requirements.
The wall structure is composed of dense column and wall plates, the two ends of the bottom beam column wall or roof, wall panels provide lateral support to the wall, setting the X shaped shear support system when necessary. All the doors and windows walls must be set above the lintel lintel, can be used to box, or L shaped cross section, the section size shall comply with the design requirements. When the seismic fortification intensity is 8 degrees and above or the maximum wind pressure is 1.5kN/m2 (standard value) above, the shear wall should be set up and take measures such as pulling resistance. The wall and the foundation floor or wall and its components must be reliable connection, strength, stiffness and stability should meet the design requirements.
The roof also adopts dense beam system on the roof, roof and roof beam by roof beam. The roof (Heng Liang) and bearing wall beam, roof panel and roof beam, roof and gable end beam, truss beam and truss roof components must be Heng Liang or Heng Liang must have a reliable connection, roof supporting length enough on the bearing, in order to keep the roof in the installation and use of the stability and integrity of the roof, and Heng Liang the roof beam should be set up between the level of support, Heng Liang also should be set up and the oblique truss cable support. When on the roof or ceiling openings, the hole should be set around the edge beam. When the earthquake intensity is 8 degrees or above and the maximum wind pressure is 1.5kN/m2 (standard value) above, through the roof cornice shear wall connecting piece and reliable connection. The strength, rigidity and stability of roof system and its members should meet the design requirements.
In order to ensure the steel structure housing living with good performance, with the bottom floor, wall and roof insulation to take measures, such as in the light steel structure skeleton cavity filled with insulation cotton, spray liquid foaming material or with foam insulation board; residential walls, floors and roofs should also take the sound absorption, sound insulation and noise reduction measures. The building envelope should also take measures to prevent the occurrence of water vapor condensation.
Used for load-bearing structure of steel, are using Q345 or Q390 steel, when there is a reliable basis, you can also use other brands of steel. Thermal insulation material made of glass fiber, polyurethane board, rock wool board, plastic board and other lightweight materials. Waterproof material can be waterproof coiled material, modified asphalt, composite materials, etc.. The structural panel can be made of directional board, glued wood (bamboo) board, gypsum board, cement fiber board, cement wood board and other materials. Roofing materials can be used asphalt tile, metal tile, color cement tile and other lightweight materials. Exterior wall decoration materials can be used metal hanging board, veneer cement veneer, composite materials, etc.. Doors and windows using a variety of lightweight materials doors and windows. Light steel structure residential system has the advantages of steel structure, but relative to other structures, features become more prominent: the structure of light weight: the basic burden is small, can greatly reduce cost basis, especially in areas with poor geological conditions; seismic response of structure, for anti-seismic structure cost less, suitable for earthquake area; production, transportation, convenient installation, enclosure, reduce labor and machinery costs. Construction cycle is short: the investment return is quick, the fund risk is low, the investment efficiency is high. The factory production, on-site assembly: wet operation, noise, dust and waste less affected by climate; without the use of clay bricks, removable and recycling, in line with the national land policy and environmental protection policy and the strategy of sustainable development; component quality stability in standardized production plant, and is conducive to housing industrialization. The new lightweight enclosure material, no fuel, no mildew, no moth; a decoration in place, less maintenance; pipeline can be buried in the wall and floor structure; in thermal insulation, sound insulation performance than the traditional structure of the housing, so better residential comfort. The bearing capacity of the wall: the wall thickness of small, high efficient use of space increases, the actual unit of the light steel structure residential use area cost and brick structure cost close to. The light steel structure housing has good economic benefits.
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