A brief analysis of light steel structure residential properties

 
Technical specification of low-level cold-formed housing construction "(JGJ227) will be implemented on December 1 this year, which marks the light steel structure housing a legal basis. Light steel residential construction is an inevitable trend of the housing industry, its development will promote the improvement of the standardization of China's residential building, industrialization and the level of modernization.
Light steel residential construction generally refers to cold-formed steel load-bearing skeleton, building envelope, separated structure and roofing materials residential buildings with lightweight materials, components and parts produced in a factory processing in the factory pre-assembled or transported to site for assembly.

Structural performance
(1) lightweight floor system
The floor by the cold-formed C-shaped steel floor beams and shop floor beam structural panels. Floor beam span 3.6m ~ 6.0m, floor beam height of 200 ~ 300mm, floor beam spacing of 600 mm. On the pre-opening in the floor beam web, so for the pipeline crossing and arrangement is very convenient. Structural panels are usually oriented strand board; can also choose a 40mm fine aggregate concrete and then pouring on the OSB. Light floor depending on design requirements, and can withstand a maximum load of 500 kilograms per square meter.
(2) wall structure
The load-bearing walls by the column, the top guide beams and bottom guide beam, support, wall structure panel. Column for the C-shaped light steel components, the wall thickness suffered loads, usually of 0.75 ~ 2mm column spacing is generally 400 ~~ 600mm column of the bottom opening upward bottom guide beam, column top opening down top guide beams; to improve the stability of the wall and column of the height range of the general wall and column equipped with two horizontal steel brace or strut. This wall structure layout, and can effectively withstand and reliable transfer of vertical loads, and convenient layout.
In order to resist horizontal wind loads and seismic role in light steel residential system, the lateral force resisting system, shear wall can be wall structural panels, cross bracing, or K-type support in the form. Structure as a shear wall panel can be directed particle board, gypsum board, cement fiberboard, and thin steel plate. Reliable connection through the connection between the upper and lower floors to effectively pass the horizontal shear force and uplift.
(3) the roof structure
The roof structure using light steel truss as the main load-bearing structure of the roof. The spacing of the roof truss roof loads can be arranged in accordance with 300 ~ 1200mm. The roof truss upper light purlins, purlin span can be 1800mm.
Roof envelope according to the needs of customers using the traditional cement tiles, ceramic tile, or a stylish colorful asphalt tile or color STONE COATED METAL ROOF.
The entire roof system is the space truss of the roof insulation can be integrated to the inclined roof peace ceiling of two parts, the middle of the space can be ventilated, so that the whole building is more breathable, can breathe housing.
Corrosion Protection

BlueScope Steel Australia R & D centers, research data analysis, galvanized steel and galvanized steel are used as structure AND STONE COATED METAL ROOF AND STEEL MATERIAL and exposed to the outside of the building, coating rate of consumption vary greatly. Even within the same building, the construction of each part of the sealing effect, resulting in inconsistency of the atmospheric corrosion environment. Galvanized coating the surface of two materials, aluminum and zinc, aluminum is easier to corrosion, extremely dense AL2O3 aluminum oxide covered the surface of the steel plate, cut off from contact of coated steel with external corrosive environment. Life expectancy of galvanized layer in the indoor environment is much longer than the life of the structure we require, you can reach more than 200 years; between the ventilation environment is very good plate life expectancy can reach 75 years.
Energy saving performance
Light steel structure system, lighter weight and flexible structure to meet the structural strength requirements on the basis of good integration of the thermal energy-saving technologies, apart from in the wall between the wall and column filled with glass fiber, also adopted in the wall exterior insulation and finish "approach of the side of the paste layer of insulation material, effectively cut off the thermal bridge through the wall and column to the wall panels; glass fiber filled the floor between the floor beams, reduce the heat transfer through the floor; within between the wall of the wall and column filled with glass fiber, reduce the heat transfer between the indoor wall.
Fire Performance
Light steel structure exposed in the high temperature of 550 ° C, generally in about 15 minutes will be the loss of load-bearing capacity and collapse. Paint, composite, or thickening of envelope material in the building envelope, use some of the fire performance better materials, to ensure that the residential fire safety performance specification requirements.
From a practical point of view of the light steel structure villa, light steel structure house after a special fire to meet fire code requirements. National fixed fire extinguishing systems and fire-resistant component quality monitoring center in the actual inspection, BlueScope Steel is equipped with double-sided double-layer gypsum board wall fire resistance test, the bearing wall can reach the fire endurance of 1.22 hours.
Sound insulation
Light steel structure house due to the force components, lighter weight, and the middle is basically a hollow structure, it is easy to form the tympanic membrane "effect, so the impact of poor sound insulation. In order to meet the complex requirements of the air noise and impact noise can be used in light steel residential interior and exterior wall and floor joists filled with glass wool, to effectively prevent the spread of the audio portion through the air. The tests showed that the fill glass wool to make the air sound insulation of the structure has been further improved to achieve more than 50dB, before processing of the building envelope, will be able to reach the requirement of having lived.
Moisture resistant
In the standard configuration of the light steel housing, the periphery of the entire wall using one-way breathing paper on the entire wall moisture-proof seal. This seal can be isolated from outdoor moisture into the interior at the same time, avoid harmful substances in the outdoor atmosphere corrosion of metal materials, can also exclude the moisture of the room. Gypsum board used in the entire wall is the wall to breathe. Breathing paper and damp proof membrane metal products and dry space in a sealed long life, but also allows the indoor air is more dry.
With aluminum foil veneer, cotton insulation in the roof can be completely isolated from the humid air to enter, to avoid metal structures directly exposed to outdoor corrosive environments.
In addition, light steel AND STONE COATED AND STEEL ROOF TILES light weight characteristics. Convenient transportation for some of the traffic is not convenient in mountainous and rural, can reduce the cost of the entire transport, can also reduce the scene of heavy machinery use, thus saving the construction period and construction costs.
Light steel material itself is not high-tech, but due to the processing characteristics of the steel, the maximum extent possible to achieve the factory processing to reduce the cycle time and cost of the construction site.
Steel as the main raw material of light steel housing system more environmentally friendly, 100% of the steel can be recycled, dry construction throughout the construction process to reduce significantly the nature of water resources use and pollution, and also greatly improved the scene The speed of construction.
All aspects of performance can be seen, light steel structure house compared to the traditional architecture has a great advantage in the people's living standards are improving, we have reason to believe that new light steel structure house with lower cost Let everyone live better.
EDITED BY STONE COATED STEEL ROOF