A model of green building?

In recent years, construction materials have been developing rapidly, which has led to the emergence of many buildings in the field of construction that are excellent in all aspects. Here, we would like to focus on a new type of building that has been widely used in developed countries such as Japan and North America in recent years -------- light steel keel system housing. It has a series of product advantages such as environmental protection, green, high degree of factoryization, etc., and has a very good performance in earthquake resistance, hurricane resistance, energy saving and other properties.

I, the basic structure

1, the basic structure of the wall

Exterior wall is composed of decorative layer, thermal insulation layer, waterproof vapor barrier, structural skeleton and gypsum board. The exterior decorative layer can be made of various textures and styles of building materials such as metal hanging panels, engineering small hanging panels, exterior bricks, exterior stone and so on. The thermal insulation layer can be any wall between R13-R30 according to the climate. Waterproof vapor barrier with one-way breathing effect.

2, floor system

Floor system mainly consists of dense rib joists, structural panels, ceiling. The joists are made of cold-formed thin-walled steel as load-bearing structure; the structural panel is oriented strand board OSB; the ceiling is gypsum board.

3. Roofing system

A new type of steel structure pitched roof is adopted, with the basic structural form: pitched beam, structural panel, waterproof layer and heat preservation layer, and decorative panel. Decorative roof panels are made of panels including composite roof panels, color embossed buckled tiles, colorful glass tiles, metal locking seam panels and colorful glass fiber tiles, etc., with variable color shapes and strong bonding and leakage prevention ability.

4, fittings

All the node fittings for residential use according to the standard matching parts required by different parts of the building, including internal and external edging of doors and windows, air-permeable ceiling of cornice, edging of mountain wall, standard gutter system, waterfall system and so on.

5, materials

Lightweight steel skeleton steel is hot-dip galvanized cold-formed thin-walled steel, strength index is 33ksi or 50ksi (converted metric 230N/mm2 or 340N/mm2); galvanized steel according to the thickness of a number of grades (Gage), from 12-20gage (converted metric 2.58mm -0.88mm) Another important indicator is the amount of galvanization, the amount of galvanization in the U.S. specification is mainly divided into three cases of application, which is G40, G60, G90 (converted metric galvanized amount of 95-126g/m2, 157-189g/m2, 252-283g/m2). Among them, G40 is used in non-load-bearing wall parts (such as partition walls, suspended ceilings, etc.); G60 is used in ordinary load-bearing wall parts; G90 is used in coastal areas or subtropical regions.

6, structure

Light steel villa adopts cold-formed steel as the skeleton of the structural system, local according to the building requirements of other structural components. Light steel skeleton spacing commonly used 300, 450 or 600mm modulus, the wall skeleton section height is generally 89mm or 140mm, the floor skeleton is generally 200 ~ 400mm high. So that the wall and floor space can provide convenient conditions for any pipe and network in the residence.

Two, excellent performance

1, seismic, wind, reliable

Compared with the traditional concrete structure, the self-weight of the light steel building is only equivalent to 1/4-1/6 of the brick-concrete structure; the wall keel after sealing structural panels and gypsum boards, the formation of a very rigid plate-ribbed structural system; and steel's excellent physical and mechanical properties make the lightweight steel structure homes have a Overall rigidity, high strength of components, light structural weight, in the earthquake, hurricanes and other rare disasters under the performance is far better than other structural forms of housing, there are experiments to prove that when the wind speed reaches 70m / s, light steel keel system building is still intact. For weak foundation areas, steel structure houses can reduce foundation cost and the probability of uneven settlement. The steel structure system can be accurately designed and analyzed, making the structural reliability of steel structure homes better than brick and mortar homes.

2. Anti-corrosion, fire prevention and durability

The use of corrosion-resistant galvanized steel in steel structure houses greatly enhances the corrosion resistance and durability of the main structure of the building, and the service life of the metal structure part can be up to about 100 years. Reasonable construction measures can ensure the fireproof performance of the steel structure; structural creep, flooding or suffering from termites, rats and other pests will not occur in steel structure houses.

3. Heat insulation, sound insulation and energy saving

The special wall structure of light steel structure residence brings you a new experience of warm in winter and cool in summer and excellent privacy. Composite lightweight and high-strength buildings, walls and panels ensure your need for heat insulation, moisture-proof and sound insulation. Walls filled with thermal resistance value between R13-R30 insulation cotton, its thermal insulation effect is greatly superior to traditional masonry, experiments have proved that 100mm thick R19 insulation cotton is equivalent to 1000mm thick brick wall; insulation cotton and insulating glass with the use of sound insulation indicators up to 40 weighted decibels or more, in addition to greatly reduce the noise pollution, insulating glass can also block 58% of the sun and 82% of ultraviolet rays; this makes the sound insulation index to 40 weighted dB above, in addition to greatly reduce noise pollution, insulating glass can also be 58% of the sunlight and 82% of ultraviolet rays; this effectively isolates indoor and outdoor heat transfer, keeps the room temperature stable, and greatly saves energy. Measured data show that the average energy consumption of steel structure houses is 1/3-1/2 of that of brick-concrete houses.

Three, affordable and convenient

1, short construction period

All the components are prefabricated in factories, and the on-site installation doesn't need large-scale installation equipments, so the workers need less, and the assembling is fast, and the construction period is greatly shortened.

2, low cost

Short supply cycle and stable price of materials; for the same house, steel structure can greatly reduce the initial foundation cost of construction by comparing with concrete or other structures with light weight.

3, fast turnover

Shortening the construction period can reduce the developer's costs (management costs, finance costs, sales costs, etc.), optimize the capital turnover, resulting in a virtuous cycle of capital. The opportunity cost can be fully utilized to create secondary wealth.

4, easy to decorate

Wall keel opening, so that your pipeline arrangement in place at once, free of drilling holes in the wall of all kinds of trouble. Delivery of the use of the rough room, only need to carry out appropriate soft decoration and installation of equipment, you can easily move in.

5. Increase area

The wall of light steel structure is composed of multi-layer functional composite materials. Under the premise of guaranteeing the strength, stiffness and thermal performance better than that of brick-concrete wall, its thickness is far less than that of brick-concrete and wood structure wall, which can increase the area of use by about 5%-8% compared with that of the traditional building, and bring you the greatest benefit in the unseen world.

Four, comfortable and modern

1, enjoy the "free space combination" of the residence

The lightweight and high strength of steel, and the flexible selection of steel structure system provide the maximum freedom for the combination of residential space. On the one hand, the steel structure can provide super-large **** enjoyable space, and at the same time, the architects can freely arrange the functional space according to the design needs without sticking to the position of the load-bearing wall.

2. Enjoy a "breathing" house

The inner wall of steel structure house is made of fireproof gypsum board. Gypsum board in addition to the fireproof function, there is a feature often unnoticed, which is the gypsum board has a breathing function, can be in the rainy season to absorb a lot of moisture in the indoor air, so that the indoor air to stay dry, and in the fall and other dry times will be released to regulate the humidity of the room. So living in a house surrounded by gypsum board is much more comfortable than a house built of masonry and cement.

3, enjoy "high quality" of housing

Shanghai steel quality ISO guarantee, all other subtle components of housing, including the high standardization of each screw, to eliminate the worry of bad construction. The automated design, factory manufacturing, and assembly of steel structures provide a platform for the productization of the entire range of housing materials. 95% productization and specification of building materials means better quality, more choices, faster speeds, and more economical prices.

Fifth, ecological and environmental protection

The new building culture of the 21st century advocated is to create an ecological environment and ecological buildings with the best quality community environment and architectural landscape, and the best structural form. The waste utilization rate of steel is 100%, which means that it can be completely recycled and reused, therefore, steel is a truly environmentally friendly building material and there will not be any environmental pollution problems caused by construction waste. In today's world, which emphasizes on protecting land, forest and earth, isn't the wonderful nature + non-polluting steel structure your first choice?

Sixth, fast construction

In the 21st century, time means money. Especially in the construction industry, if the construction time of a house can be shortened by two thirds, it will save more capital for property developers or owners. And the most outstanding advantage of lightweight steel housing is manifested in its construction and installation. North American assembly housing system is a large number of finished products and semi-finished building materials, so the construction and installation speed is very fast, to a villa, for example, the construction of the construction from the foundation to the completion of the finishing touches, the entire residential construction process takes only 3 months of time; in contrast, the ordinary concrete villa construction period from the foundation to the completion of the 5 months, but also another 2 months of finishing touches, costing a total of ***7 months time before the owner can move in. The total time spent is ****7 months before the owner can move in.

VII. Conclusion

This article describes the comprehensive advantages and characteristics of the light steel keel system, I believe that light steel housing will become a trend in the twenty-first century residential development. Take this article to let more people can recognize the light steel residence, accept the light steel residence. So that this new building system can flourish in the next few years.

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