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Armanpey construction co
تاسیس : 1361 شماره ثبت : 44958
تاسیس : 1361 شماره ثبت : 44958
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بیمارستان عرفان ، تهران
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5/29/16
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Armanpey was established and started to work with the aim of promoting building industry and with employing proficient engineers in 1983. This company has cooperated with variety of governmental and non-governmental organizations.
As for increasing demand and extensive development of urban spaces, housing supply in a short time is always being raised as a big challenge. This company since 2004 with utilization of new technologies in building industry and inspection of new construction systems with ability of attracting and development in country’s construction market and also competitive with traditional systems which have low speed in construction and short lifetime, has worked in the area of prefabricated buildings design and construction with the use of LSF method (approved by Road ,Housing & Urban Development Research Center) and with the purpose of evolution in building construction industry of traditional systems. Utilization of Lightweight Steel Frame that briefly named LSF mostly used for maximum 5 floors buildings with residential, hospital, official and training applications.
LSF is one of the new technologies in civil construction field of the country and presents specifications such as significant weight loss, high speed construction and installation, increased safety against lateral loads, increased damp proof course and increased sound and heat insulations.
Lightweight Steel Frame
Prefabricated buildings with Lightweight Steel Frame (LSF) method get used dry run and mostly with the use of screw fittings and industrial production method. These buildings are formed from three main parts consisting of cold rolled steel sheets for structures, cement and plaster boards as cover for internal and external surfaces, and heat and sound insulations. LSF method in building construction has been utilized since 1950 in Canada, and has found a special place in building construction industry of developed countries because of owing many benefits such as high construction quality and appropriate seismic performance. In addition to developed countries, this method has been propounded in many other countries in the world.
This method has proved itself very well and at the present it is one of the fastest construction methods.
Some of the main advantages of LSF method are as shown below:
1- Building weight loss:
Cold rolled thin sections are lightweight and rigid and offer the highest ratio of resistance to weight in comparison with other building materials. Moreover, used panels are produced from specific methods in the factory and thus the ratio mentioned above is also raised. Therefore, structural weight in this method decreased by 50 percent on average compared with other prevalent methods.
2- Resistant against loads on building and earthquake:
This system resists against gravity and lateral loads (wind and earthquake) which determined according to national building regulations of Iran. It is essential to note that as owing to a significant decrease in weight of buildings, the lateral load caused by earthquake is reduced and therefore this system offers a very appropriate seismic performance.
3- Reducing construction time:
Lightness of components and simplicity of assembly and system applicability in all weather conditions and also, providing the working possibility of other building groups simultaneously and in parallel, the construction time is minimum. Owing to utilizing plaster and cement panels, building finishing operations are done fast and with a high quality. Consequently, it causes a significant reduction in construction time and rapid return on initial investment accordingly.
4- Increased the useful life of the building:
According to appropriate cover of structural elements, even with forming steel sheet for constructing desired sections, no cracks or other damages created on the cover. This type of cover causes high resistance against humidity, climatic and physical factors. Composing elements of the building have no attraction for insect invasions.
5- High resistance against heating, cooling and sound transfer:
For the reason of filling the space between panels with proper insulations such as rock wool and polyurethane foam, even in comparison with traditional made buildings, this system highly meets the 19th section of Iran's National Building Regulations. Furthermore, proper sound performance in internal spaces is the other advantage of this system.
6- Fire-resistant:
None of the composing elements is inflammable. Owing to covering structural elements with fire resistant prefabricated panels, structure in this system has outstanding fire-resistance.
7- Reduced materials wastes:
There is an ability of recycling materials. It is required to mention that waste and residual materials are minimal during building construction.
8- Reduction in costs:
All facilities in this system are simply accessible which cause a substantial reduction in maintenance cost of them. In addition, as for reducing construction costs and also appropriate heat transfer resistance that causes a considerable decrease in construction and operating costs, this system presents a very reasonable option for building constructions.
9- Expansion possibility of existing buildings:
As for relatively low weight of LSF system, by taking necessary cautions and measures, there are possibilities of adding to floors of existing buildings and it is the best system in this regard.
10- No need to special equipment:
Composing elements of LSF system are lightweight and therefore material parts are simply carried and replaced in different sections of a project.
11- Ease in construction and installation of facilities
12- By offering structural materials list, required parts produced according to project specifications and geometry in a short time in the factory and thus construction and installation of structures are done with a considerable reduction in the volume of operations and manpower.
13- Adaptability with environment:
Materials used in this system have no harm to the environment as it requires less traffic and transport at the project site during construction and also used materials can be reproduced for reuse.
14- Other benefits of LSF system:
- Design diversity and building construction with different views;
- Good-looking appearance;
- Simplicity in prefabricating and mass production;
- Quick and easy installation;
- High precision in construction;
- Increased building surface area because of wall thickness reduction;
- Ability to combine different types of lightweight and new materials with traditional materials;
- No need to formatting;
- No existence of creep and drop in ambient temperature;
- Ability to install all kinds of windows in this system;
- The possibility of changes in details of work;
- Less workshop space occupation;
- Since there is no need to special equipment, there is more safety in workshop;
- Flexibility in design because of high possibility of construction and production of all kinds of profiles;
- Diversity in building face design owing to ability to utilize a variety of types of façade materials;
- Meeting requirements and standards regarding building performance;
- According to production method of the elements, profiles are similar in terms of dimensions and shapes.
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سازه های ال اس اف از فولاد سرد نورد شده

مقدمه :

سیستم ساختمانی قاب‌های سبک فولادی سردنورد شده(LSF)

ساختمان پدیده یا محصول مرکب و تلفیقی است که حاصل فعالیت و دخالت تخصص های متفاوت علمی و اجرایی در رده های مختلف تصمیم گیری، طراحی وساخت است.

اولویت های ساخت





1) اقتصاد و هزینه

2) سرعت اجرا و زمان بندی

3) کاربرد سیستم قابلیت ها و ویژگی های فنی آن

قانون بودجه سال 1386 کل کشور، ویژگی های کلی فناوریهای نوین را مطرح کرده و مراحل و ساز و کارهای مورد نیاز را بیان داشته که از ارکان اصلی آن تایید فناوری از حیث فنی است که این مهم بایستی توسط مرکز تحقیقات ساختمان و مسکن تحقق پذیرد. این مرکز به عنوان مرجع تایید فناوری های نوین و شیوه های تولید صنعتی ساختمان معرفی شده و کلیه تولیدکنندگان و وارد کنندگان فناوری های نوین ساختمانی ملزم به اخذ "تاییدیه فنی" از این مرکز هستند.



کلیات

استفاده از اعضای فولاد سرد نوردشده از دهه 1850 میلادی آغاز گردید. ولی استفاده از آن تا انتشار اولین ضوابط انجمن امریکایی آهن در1946گسترش زیادی پیدا نکرد. اولین استاندارد طراحی بر مبنای تحقیقات انجام یافته در دانشگاه کرنل سال 1939 و با پشتیبانی AISI تدوین گردید. امروزه بدلیل کیفیت مناسب ساخت و سرعت بالا و مقاومت بالا در برابر زلزله از آن در کشورهای انگلستان، امریکا، کانادا، استرالیا، ژاپن و... استفاده می کنند.



ساختمان های پیش ساخته فولادی سبک (Light Weight Steel Frame)به LSFموسوم بوده که بصورت خشک وعمدتا با استفاده از اتصالات پیچی بکار می روند.این ساختمان ها از 3جزءاصلی شامل:مقاطع متشکل از ورق های فولادی سرد نوردشده برای سازه،صفحات تخته گچی به عنوان پوشش رویه درونی ولایه عایق حرارتی وصوتی تشکیل می شوند. کاربرد این ساختمان ها به عنوان یک سیستم سازه ای مستقل و اکثرا درانبوه سازی ساختمان های دوطبقه، دفاتر و ساختمان های تجاری کوچک، واحدهای صنعتی و سالن های ورزشی یک طبقه است. یک سیستم سازه ای باربر ثقلی است که قابلیت ترکیب شدن با سیستم سازه ای دیگر، مانند دیوارهای بتن مسلح سازه ای را دارد. در ساختمان های کوتاه بصورت سیستم سازه ای مختلط بکار می رود. استفاده از اشکال مختلف آن طبق آیین نامه مجاز بوده است. مقاطع آن دارای ابعاد متنوع و محدوده تغییرات ضخامتی بین 2.5 تا 6/0 میلیمتر می باشند. اتصال LSFبه شالوده به واسطه کلاف افقی با مقطع c، شکل می گیرد. اجزاء قائم به عنوان عضو باربر ستونی در بارهای ثقلی عمل می کند، برخی از این اعضا در دهانه مهاربندی جانبی سازه علاوه بر بار ثقلی، متحمل نیروهای ناشی از بار جانبی هم بوده که تحت نام وادار(stud) در سیستم معرفی شده اند. سقف این سازه ها متشکل از تیرچه های فلزی سردنوردشده است. تیرها و تیرچه ها عمدتا دارای مقاطع با اشکال cوz می باشند. پوشش سقف با دال بتنی در صورت یکپارچگی لازم بین بتن و پروفیل فولادی تیرچه، می تواند به عنوان سقف مرکب فلزی طراحی شود. LSF، بمنظور باربری جانبی سازه در امتداد اصلی متعامد، از دهانه های بار برجانبی استفاده می شود

(Load Bearing Wall).دهانه های باربر به 4روش ایجاد شده: سیستم دهانه های مهاربندی با اعضای قطری، سیستم دیوار برشی با ورق فولادی نازک، سیستم دیوار باربر با پوشش OSBو سیستم دیوار برشی بتن مسلح؛ که مهاربندی با اعضاء قطری برای ساختمان های تا 2طبقه مسکونی و سیستم باربر جانبی دیوار برشی بتن مسلح تا 4طبقه مسکونی مجاز است.انتقال حرارتی کم، آن را برای استفاده دائم مانند: ساختمان های مسکونی با مشکلاتی روبرو می سازد ولی عملکردش برای استفاده های منقطع مناسب است. عملکرد صوتی دیوارها و سقف های ساخته شده درصورت رعایت تمهیدات پاسخ گوی انتظارات تعیین شده مقررات ملی ساختمان می باشد. مواد تشکیل دهنده LSF بار حریق ندارند و لیپروفیل های سرد نورد شده مقاومت کمی در برابر حریق دارند و بایستی بخوبی محافظت گردند، که یکی از دلایل کاربرد گچ به عنوان پوشش داخلی رسیدن به این هدف است.

از عمده مزایای LSF کاهش جرم ساختمان، کاهش هزینه در مصالح، نیروی انسانی و زمان احداث پروژه هاست. بکارگیری این روش در ساختمان های 5 طبقه کشور بارعایت تمهیدات خاص مقدور می باشد
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A great example of possibilities with LSF (Light Steel Frame) construction.
"By constructing the house in steel, the architects were able to leave much of the land intact by only having the footings disturb the ground......"

A great example of possibilities with LSF (Light Steel Frame) construction.
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LSF system
LSF alternative building and construction solutions provider Silverline Group is undertaking 82 projects in the com.. http://ow.ly/pMeLC
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