DUOL Company DUOL has been active on the market since 1992 and throughout this period Duol has successfully attained the position of one of the most significant suppliers of fabric structures. Duol success results from excellent price-quality ratio which is ensured by our in-house team of specialists, our own production facility and certified quality. With our individual care to clients we are experts at finding the most suitable solution and giving our clients best value.
More than 1100 covered sport facilities over the world have been designed, produced and installed under the DUOL trademark. Our objects incorporate the latest innovations in design, fabrics, anchoring, mechanical, electrical and energy saving systems. We consider it our obligation to continually develop our fabric structures and continuously invest in employees and latest technology in order to continue to be perfect business partner for our clients. Dušan Olaj CEO
TECHNICAL PERFECTION Every component in DUOL air dome benefits from 20 years of experiences and high investment in R&D.
DUOL engineers the structure to meet the same code requirements established for permanent buildings. All DUOL’s constructions are produced according to the European standard EN 13782. This standard specifies safety requirements which need to be observed at design, calculation, manufacture, installation, maintenance, operation, examination and testing of mobile, temporary installed tents more than 50 m2 ground area. The content of this European Standard collects the different existing national regulations and guidelines as far as possible.
DUOL’s final product is certified with ISO management system 9001 as well in compliance with standard EN 13782, means we keep in all calculations reserve as requested with this standard.
AIR DOMES Changing climate it is no longer guarantee for non-stop seasons, that’s why many of investors ask to cover their sports areas. Air supported structures are perfect cover to keep sports facilities active despite the weather conditions whatever they are.
With Duol air-supported structures a variety of professional and recreational sports and recreational activities can be played year-round, in any kind of weather. DUOL Air Domes offer the advantage of quick erection and the possibility of permanent or seasonal use. Air domes are always cost effective! This is possible due the fact that air supported structures do not require concrete, steel or wooden supporting construction. Air is only supporting system provide the amount of clear span space needed for. The short investment cycle involved and their long durability ensure high profitability. The special design of DUOL domes gives consumers the same level of comfort they are used to with traditional sports buildings.
AIR DOMES MINIMUM INVESTMENT -
MAXIMUM RETURNS
DUOL air supported structures are revolutionary structures offering unparalleled cost benefits over conventional construction methods. Cost of design, manufacture, site preparation and installation are all a mere fraction of those of conventional construction. Unlike traditional structures, Duol structures also require less paper work.
AIR DOMES SEASONAL STRUCTURES
Quite often it is profitable to have the air structure in place only for wintertime activities and remove air dome during the summer months.
During last 20 years Duol has covered over 1100 sport courts and as a clear market leader enjoys the confidence of customers all over the Europe, Scandinavia, Russia, Middle Asia, Balkans and Arabic world. The reason for the success of DUOL turnkey projects is its in-house manufacturing, engineering and design department along with its team of experienced project managers and assembling personal who offer unique solutions based on the individual needs of the customers.
FC Lokomotiv Moscow
Imatra, Finland
PRESTIGUE REFERENCE OBJECTS
Klaukkala
Kauhajoki
FC Tromso
Zheskazgan – 15000m2 big
PRESTIGUE REFERENCE OBJECTS
Hveragerdi, Iceland
Stadion Yantar - Moscow
Seinajoki
Turku
PRESTIGUE REFERENCE OBJECTS
Dinamo Volgograd
FC Kontu
Hockey arena Sochi
FC Turku
PRESTIGUE REFERENCE OBJECTS
Copenhagen
Brussels
Trondheim
Food processing plant air domes
EXPERIANCES IN ALL SPORTS FOOTBALL
EXPERIANCES IN ALL SPORTS TENNIS
EXPERIANCES IN ALL SPORTS POOLS
EXPERIANCES IN ALL SPORTS HOCKEY
EXPERIANCES IN ALL SPORTS MULTISPORT
EXPERIANCES IN ALL SPORTS HANDBALL
EXPERIANCES IN ALL SPORTS GOLF
DIRECT SUPPLIER DIRECT SUPPLIER
We manufacture, install and maintain the products we sell. We are not simply “brokers,� selling components manufactured by others and relying on a disconnected group of vendors to perform the follow up and warranty services demanded by an air, frame or tension structure.
Our manufacturing experiences, best quality materials and ISO 9001 production quality guaranties you best product warranty of its kind.
DIRECT SUPPLIER
Duol does not sew or “heat seal� together its fabric. We use Electronic high frequency (HF) welders to attach fabric panels in a way that equals the original strength of the fabric. This increases the life of the structure, prevents undesirable air loss, and eliminates costly maintenance and repair.
DUOL production facility
DIRECT SUPPLIER Duol directly provides you with: • plan of foundation, • manuals, • technical characteristics, • sketches, • certificates, • structural drawings, • calculations, • and others…. sealed by a professional engineers for the owner’s use in obtaining all necessary documents.
In early stage Duol team can also calculate estimated total energy usage.
Duol provides you with all structural drawings and calculations.
Duol provides you with all structural drawings and calculations.
COSTUM DESIGN COSTUM DESIGN
Do you need to design a fabric structure to meet a certain thermal insulation? Do you want specific shape of the dome? Need a specific color? Duol’s proprietary, high strength fabric has a wide variety of options available to meet your needs and Duol engineers are there to assist you.
We understand our clients and we propose a solution meet the specific requirements of the given project. Whatever combination of activities you can imagine for your facility, we can provide you with a turn-key, custom designed air-supported structure to cover it. Utilizing our proven technology, we are able to roof an area of practically any reasonable size, be it a single tennis court or a large football pitch.
STANDS, SHOWERS, WARDOBES ‌ Duol can supply all the elements (stands, wardrobe, toilets) necessary to provide a finished product for recreational or professional use.
STANDS, SHOWERS, WARDOBES …
QUICK INSTALLATION QUICK INSTALLATION
After design approval we design, manufacture and install turnkey structures in a matter of weeks. Installation is simple, quick and cost effective. The dome is hand-over to the client after air structure detailed maintenance course with complete operation & maintenance manuals for the air structure covering and the equipment included.
INSTALLATION PROCESS 1. PREPARING FOUNDATIONS Preparing foundations, drilling and inserting anchors (build in anchors are added within filling with concrete).
2. STRETCHING THE MEMBRANE During stretching and joining membrane additional help from local peoples are required (usually 20-25), fore some hours. Pallets with membrane are placed on the right position by crane or lift fork. Before placing doors on spot, foundations for them must be ready.
INSTALLATION PROCESS 3. PLACING HEATING-INFLATION UNIT Before placing heating-inflation unit on the spot, foundations for them must be ready with all necessary electric cables and pipes for fuel or gas.
4. ANCORAGING MEMBRANE Anchoring system depends on the type (seasonal or permanent) and on the size of air dome. Pipes or L bars are usually used for fixing the membrane.
INSTALLATION PROCESS 5. INFLATING THE DOME Inflating of the dome is done in windless conditions. Inflating takes 20-50 min depending of the size of the structure.
6. INSTALING LIGHTING To install direct lights dome must be deflated, that means procedure depends on all the conditions as for inflating of the dome.
AFTER SALE SUPPORT After you purchase Duol air dome you relay to most experienced group of professionals in the world. For all of our customers, we are available 24 hours a day, 7 days a week. Some of our after sale services: • Seasonal air supported structure installation and takedown • Yearly maintenance • Air supported structure inflation system maintenance and service • Inflation system retrofitting • Heating and/or cooling system maintenance • Fabric retrofitting • Emergency maintenance • Air supported structure relocation & moving
AIR GENERATORS DIRECT SUPPLIER We are only fabric company designing air generators specially for air domes.
DIRECT SUPPLIER
Each Duol air structure is equipped with a mechanical system that is customdesigned to fit exact specifications to maximize energy efficiency.
Duol air generators are started-up and warranted by Duol’s factory-trained and authorized technicians. DUOL air generators production facility
AIR GENERATORS DIRECT SUPPLIER
By designing our equipment specifically for the use for air supported structures, we have refined our controls, air distribution and quality to the best in the industry. Benefits of Duol custom designed air generators: Improved modulating system (up to 35% saving) Smart energy-saving mode In calm conditions, blower units operate at only 50% capacity, greatly reducing running costs Optimized combustion, thanks to condensing chamber Reduced hot air stratification Mounted on anti-vibration basis - silent operation Special insulated sandwich panels resistant to extreme low temperatures Other Quality stainless steel frame different energy sources: gas oil, hot water, electricity, gas; Control panel on board – Easy manual operation Environment friendly with zero carbon monoxide (CO), minimum nitrogen oxides (NOx) and low carbon dioxide emissions
EMERGENCY UNIT Reliability and safety are the most important features of Duol structures, and the emergency source of power is a critical item that must not be left to chance. Duol emergency units, special designed for air domes, include three models: SD 1 SD 2 SD 3
The difference between the units is in the flow of air. Each model has three possible versions: STANDARD STANDARD + ANEMOMETER MODULATING
DUOL air generators production facility
EMERGENCY UNIT The emergency unit consists of diesel engine or/and 380V electric motor, connected to a centrifugal fan, that provides constant pressure inside the dome in normal conditions. Emergency unit automatically starts when the pressure inside the dome is low, the main power is interrupted, in high wind speeds. The pre-calibrated factory operating pressure is ca. 200 Pa or according to specific user requested. When the pressure drops below of security limit the electric motor become operational. Diesel engine intervenes only when the electricity fails. Our system of double engine diesel and electric providers a substantial savings – 50% of energy the electric operational system under normal atmospheric conditions (windless, snow, heating) can maintain the pressure inside the dome instead of the main generators.
ENERGY SAVING OPTIONS WIND SPEED DETECTION SYSTEM Our wind speed detection system is the most advanced automatic system available. It uses modern computerized controls for interior pressure, heating and monitoring. The emergency unit is switched on by the system in case of strong wing in order to maintain the right pressure inside the air dome. AIR GENERATORS WITH MODULATING SYSTEM The control system proportionally decreases or increases burner’s heat output as the appliance temperature approaches the set point. There is an automatic variation of the burner’s heat output depending on requirements. With this system you can optimize consumption. This system provides up to 35% saving. (In non-modulating system there is only one firing rate here: on or off and it fires at its maximum rate whenever the burner is on.)
TRANSPARENT MEMBRANE Transparent membrane offers even grater light transmission, offering additional energy saving and pleasant indoor environment.
ENERGY SAVING OPTIONS INTELLIGENT ENERGY CONTROL (INTELLERGY) Duol has integrated a state of the art Intelligent Energy Control (Intellergy) into the inflation unit to enhance system controllability, stability and efficiency. Intellergy offers constant real-time supervision of the air domes activity and vital technical data with alarming. This DUOL high-tech system is connected to various sensors and relays which are gathered in the main unit and from there transferred through LAN internet cable or GPRS signal to the internet server. Data is there processed, logged and displayed in a different graphs and tables. For each data an alarm can be adjusted to inform the air domes user with SMS on mobile phone. In this way the customer has total surveillance over the air domes pressure, temperature, lighting, alarms ‌ For some selected parameters remote managing can also be adjusted (lighting, heating...). DE-STRATIFICATION SYSTEM De-stratification system improve temperature distribution in the space and reduce the time needed to reach the Ta, this in turns reduce the time the heaters are Without De-stratification system With De-stratification system turned on. It is designed for quiet operation.
DUOL DMSTM DMSTM (Double Membrane System) is innovative air pocket solution which greatly reduce energy consumption.
DMSTM comes with three variants. Standard DMSTM provides thermal insulation of 3.05 W/m2K, while DMS PlusTM provides thermal insulation down to 1.74 W/m2K and E-DMS PlusTM down to 1.43 W/ m2K (measured at Finnish Research Institute VTT). DMSTM thermo (Double membrane system without thermal ) is available for best thermal insulation.
FABRIC CHARACTERISTICS Standard Duol membranes are UV resistant, but with use of special lacquering finish like Polyvinylidene fluoride (PVDF) or Titanium dioxide (TiO²) this resistance is even better, what increases materials quality and lifetime.
DUOL DMS PLUS DUOL implements advanced membrane coating, which is self-cleaning to preserve perfect white color of membrane for many years and for many dismantling and assembling procedures. AESTHETIC PERFECTION Duol membrane technology is a warranty that DUOL air domes are object of admiration among visitors and local community and are object where people love to gather.
YOUR BENEFITS: • • • • • •
High and consistent transparency & luminosity Whiteness, visibly cleaner surface Greater resistance to chemicals Less cleaning cost Ecological friendly due to reduced energy and water usage for cleaning Folding of membrane doesn't case damage to coating materials. This offers easy storage of membrane during seasonal removal.
FABRIC CHARACTERISTICS DURABILITY / LIFE EXPECTANCY In DUOL double membrane system, the replacement of the membrane is not required and the life expectancy is extended to 40+ years, based on tests, experiences and existing projects.
NATURAL LIGHT As both membranes are highly translucent, the use of lighting system is not required during the daytime, what leads to big electric energy savings. FIRE RESISTANCE All membranes are fire retardant, certificated by following certificates: M2/NFP 92-507, TEST 2/NFPA 701, CSFM T19, B1/DIN 4102-1, BS 7837, B1/0N0RM B 3800-1, M2/UNE 23.727, VKF 5.3/SN 198898 and others. RIGIDITY With mechanical resistance and specific porosity design our fabrics provide excellent dimensional stability, structural strength and wind protection. Thanks to DUOL expanded double membrane system, the DUOL domes are very rigid and vandalism resistant. In case of any damage on the outer membrane, the inner membrane still hold the proper air tightness and consequently pressure – air dome stability.
FABRIC CHARACTERISTICS STORM PROTECTION DUOL dome has an automatic safety back-up system, which control the air dome pressure and stability in case of storm and high wing. SNOW The shape of the air dome, which is designed depending of its size and considering the weather conditions of its destination, totally flat surface and lacquering finishes, ensure that the snow slides form the air dome. CONDENSATION Thanks to excellent insulation, achieved by DUOL expanded double membrane system, there is no condensation inside the air dome. Condensation is on inner side of the membrane and in between all layers. ENVIRONMENTAL COMMITMENT Lightweight and durable, Duol fabrics are also 100% recyclable.
SPACEDOMETM SpaceDomeTM insulation system developed by Duol is only air-dome insulation system to efficiently reduced al three types of heat transfer: conduction, convection and radiation. It is made from high-tech materials developed in space technology with lowest thermal conductivity of any solid material.
SpaceDomeTM has better thermal performance than
standard double membrane system. With SpaceDomeTM system air dome heating and cooling costs are reduced to the level of a conventional building which is outstanding achievement.
SPACEDOMETM
Outer shell dome Outer air layer shell dome Encapsulation SpaceDomeTM is made from 7 layer system which is specially designed to reduce convection, conduction and radiation.
SpaceDomeTM Encapsulation
Inner air layer shell dome Inner shell dome
SPACEDOMETM
Pure material delivered from factory.
Production of 7 layer system.
SpaceDomeTM insulation is ready for shipment.
SpaceDomeTM during installation process.
Word most energy efficient air dome is finished.
ALL WEATHER COMFORT Duol DMSTM membrane system provides resistance to harsh climatic conditions and ensures the high temperature insulation. For maximum energy savings DMSTMThermo and SpadeDomeTM insulation system are available.
Duol heating units safely and efficiently heat the air structure to the desired temperature and humidity. Air conditioning system is available as well, and is custom-designed for each project’s specific requirements.
EXTREME WEATHER CONDITIONS DUOL air domes are located around the world in a variety of climates - from cold and windy Kamchatka to hot deserts in Middle East.
DUOL air supported structures are designed according to local weather conditions and are engineered to withstand most of unusual weather conditions and natural disasters.
EXTREME WEATHER CONDITIONS
Duol is expert in designing air domes for extreme weather condition. We enhance all elements (membrane, air generators, anchoring system‌) to withstand extremely low temperatures with strong winds and heavy snow.
EXTREME WEATHER CONDITIONS Duol advanced technology allows installing air domes in extreme weather conditions without any cables support.
In fact only one Duol air dome is supported with cables. This air dome is installed in Kamchatka in far east of Russia, where winds quite often reach speed more than 50 m/s, alongside with heavy snow. For other climate areas there is no need for cable support with Duol technology.
DUOL DOUBLE MEMBRANE SYSTEM vs CABLE NET SYSTEM INSULATION DUOL double membrane system provides excellent thermal insulation from 3W/m2K to 1.74W/m2K, measured at Finnish Research Institute VTT. This is achieved by inflating the interspaces between two membranes with air (approx. 50-100 Pa, compared to the air dome inside pressure). This slight overpressure ensures that the membranes are always inflated, while the static air is an excellent insulator. Compared to cable net system, which total thickness is only a couple of centimeters narrow, and offers a very poor insulation. FIRE RESISTANCE All membranes are fire retardant, certificated by following certificates: M2/NFP 92-507, TEST 2/NFPA 701, CSFM T19, B1/DIN 4102-1, BS 7837, B1/0N0RM B 3800-1, M2/UNE 23.727, VKF 5.3/SN 198898. Compared to cable net system, the layers are not fire safe, in fact they are extreme flammable, which presents a great risk to the whole of the structure. DURABILITY / LIFE EXPECTANCY In DUOL double membrane system, the replacement of the membrane is not required and the life expectancy is extended to 40+ years, based on tests, experiences and existing projects. Compared to cable net system, where the layers have to be replaced every couple of years also due to friction between cables and fabric. INTERNAL PRESSURE The pressure kept in the DUOL domes is minimal, from 150-250 Pa in normal situations, what ensures perfect stability in all weather conditions and less energy consumption. Compared to cable net system, which due to its weight requires much bigger internal pressure (250-400Pa) which leads to much bigger electric energy consumption.
DUOL DOUBLE MEMBRANE SYSTEM vs CABLE NET SYSTEM CONDENSATION Thanks to excellent insulation, achieved by DUOL double membrane system, there is no condensation phenomenon inside the air dome. In cable net system, because of poor insulation and big thermal bridges,there is big risk for condensation on the outer side of the dome. LOSE OF TRANSLUCANY Duol fabric has self-cleaning characteristics and is absolutely maintenance free. Cable net system is great obstacle for self-cleaning mechanism. Cables on the outer side of the membrane prevent the dirt, organics microorganism‌ from sliding of the surface. Dirt cannot be totally removed, therefore translucency is reduced what represents great costs for the client. RIGIDITY Thanks to DUOL expanded double membrane system, the DUOL domes are very rigid and vandalism resistant. In case of any damage on the outer membrane, the inner membrane still hold the proper air tightness and consequently pressure – air dome stability. Compared to cable net system, where in case of any membrane damage there are big air losses and the structure stability is jeopardized. SNOW The shape of the air dome, which is designed depending of its size and considering the weather conditions of its destination, totally flat surface and lacquering finishes, ensure that the snow slides from the air dome. Compared to cable net system, where cables on the outer side of the membrane prevent the snow from sliding of the surface, which lead to the snow accumulation and consequently to air dome collapse. SEASONAL INSTALLATION / DISMANTLING As two membranes are welded together, the installation process is extreme fast. Membrane should only to be spread, connected and anchored and the erection of the dome can be made. This operation can take only a few hours. The same is in seasonal dismantling. As the cable net system requires spreading of different layers, connecting them and afterwards installation of metal net, the installation/dismantling process in significantly longer and costs are higher.
AIR DOME ELEMENTS
LIGHTING SYSTEM Duol high intensity metal halide lightning systems utilize the highly efficient optical reflectors to provide maximum lighting uniformly on the playing surface. The inner ambient of the dome is lighted by proper quantity of the halogen lamps in two different modes: directly or indirectly. At direct lighting the lamps are mounted on the membrane to give light on the sports field directly, at indirect lighting the lamps are installed on the metal poles and light up.
LIGHTING SYSTEM In order to maximize the amount of light in the dome, we design our lighting system to reflect off of the curved dome surfaces and bounce back to the floor. The key is the highly reflective fabric liner which was specially formulated for need of reflectivity.
Benefits of DUOL lights technology: High optical efficiency Highly durable, low maintenance Energy efficient Eco-friendly Natural spectrum light Hit, dust and moisture resistant
LED LIGHTS Duol’s innovative DuoLedTM lights are ideal solutions for all sport areas, environments and conditions - from single tennis court to football stadium and everything in between. In addition to the huge savings in electricity, DuoLedTM also offer significant savings due to reduced maintenance and replacement costs thanks to Led’s durability and longer lifespan.
We replaced the “traditional” lighting with DuoLedTM. Previously, the power consumption was higher than 5 kWh and the average illumination was not satisfactory. The old lights were close to end of life cycle and seldom exceeded 200 Lux on the ground. By adopting the DuoLedTM, tennis court is now using less than 2,5 kWh with over 350 Lux average lighting and remarkable uniformity.
LED LIGHTS Advantages of DuoLedTM: - High uniformity and energy saving (between 50 and 75%) - Reduced glare, particularly during smash/volèe - Solid State Components (high resistance to accidental damages) - Life cycle higher than 50.000 hours, against the average 8.000, - Lower maintenance cost - Greater consistency in light delivery over the time - No warm up time, instant light up - No emission of UVA and UVB rays, doesn’t contain hazardous substances - IP65 certified for outdoor use
The higher investment costs of DuolLedTM (blue line) is repay in two and a half years on average (time depends on local electricity price and on lights usage per day).
ANCHORING SYSTEM It is many possibilities, how to connect the membrane to the concrete beam. The rings with peg crossed by a metal tube or grounding anchor with metal tube are used for temporary assembling – seasonal use of the dome. For permanent assembling the anchoring is done by metal profiles. The anchors are mounted in to the concrete beam in a distance 1m, around the perimeter. The anchoring in some situation could be done also by auger anchors, without any concrete foundation. Auger anchors are grounded directly to the ground in the depth of 2mt.
With DUOL advanced anchorage system air loss around the base perimeter is greatly reduced, providing savings on inflation.
ANCHORING SYSTEM PIPE SYSTEM
Small to medium domes Fast installation/dismantling
ANCHORING SYSTEM L OR U PROFILES SYSTEM
Medium to big size air domes Perfect tightness
ANCHORING SYSTEM DUOL anchorage system is design to leave no protrusions above grade when the structure is removed.
ANCHORING SYSTEM The membrane can be anchored in the concrete beam also with use of ground anchors, directly into existing ground.
SECTIONAL RECONNECTION For large air structures and many seasonal structures, it is desirable to limit the size of a single section of the fabric envelope. A series of long aluminum or wooden bars create an air and water tight flexible seal that is covered by heavy duty fabric to eliminate leaks.
REVOLVING DOOR One unique feature of air structures is their doors which are specifically designed for the continuous positive pressure environment. There are three main types of doors used in air structures: Revolving Doors for normal entry into the dome, Pedestrian Doors and Emergency Exit Doors.
Revolving Doors are specially built to withstand the building pressure pushing in both directions on the panels without fatigue failure. Brush seals minimize air losses while maintaining smooth operation. The doors include large glass panels to see other users, and the housing is made from maintenance free aluminum.
PEDESTRIAN DOOR Pedestrian Doors are used for wheelchair access, for hand-truck deliveries and they are suitable as entrance for disabled people. Two doors are built in a frame with a short connecting tunnel creating an airlock system, thereby maintaining the building pressure and minimizing air loss. The frame and doors are also built from aluminum for long life and include vision panels for safety.
EMERGENCY DOOR The primary purpose of emergency door is to give an emergency means of egress. Standard dimensions are 143cm x 220cm. The frame and the door leaf are made by metal construction. The door leaf has small circle window.
TRANSPORT TUNNEL Large equipment such as trucks can be brought into air structures by the use of a transport tunnel. Two large overhead doors at each end of the tunnel are interlocked so that only one door may be open at a time. Transport tunnels use high strength doors and are available with remote control switches and key locks. The roof of metal construction is covered by polyester fabric coated with PVC foil. Walls of the tunnel are closed by metal sheets.
WINDOWS Although the air structure fabric is translucent, it is not transparent. Even so, windows are an optional feature.
CONNECTING OPTIONS Air structures can be attached to other buildings in a variety of ways.
If the need arises for a larger facility, expanding or modifying an air structure is a simple procedure and can be accomplished with a minimum of disruption. Our dome can be shortened, prolonged or relocated at any time, even doors, tunnels and connections to buildings can be added additionally.
DIVIDING CURTAINS Dividing curtain splits your exercise area into more units.
CUSTOM DESIGN
AIR DOME PERSONALIZATION DUOL air domes has possibility to place advertisements/symbols of comunity/logos on air dome. They can be various sizes and colors.
AIR DOME ADVANTAGES SAFETY VIEW
The air supported structure is an autonomic object, means in emergency situation it is maintained by itself. Emergency heating unit provides the stability of the dome in a time of blowing unit default or in a case of electricity break-down. Each dome is equipped with certain number of emergency exits according to the dimension and purpose of the dome. Fabric is fire-retardant and all mechanical equipment meets standards. Unique structural design of air dome allows to stand heavy wind and snow loads and unlike conventional buildings, there is less danger of collapsing debris in an earthquake.
ENERGY AUTONOMY SEISMIC SAFETY WEATHER RESISTANCE APPROVED AND VERIFIED CALCULATIONS SAFETY DESIGN AND PLANNING
WeCare WeCare At DUOL, we strive to reach the highest level of quality in our business and we aim to make sure that your decision in choosing an air dome would be easier as possible. WE CARE ABOUT OUR CLIENTS. WeCare is a concept specially developed with our clients in mind. Quite simply, our goal is to make to more transparent to choose correct solution of air supported structure – even if you will not buy it from DUOL. Responsibility beyond the doors of DUOL Company – the WeCare concept is also caring about what goes on beyond our company doors. We invest a lot of time and resources in developing new technical innovation, as well as finding future green oriented, client-friendly solutions for all levels of our operations. WeCare is our promise to you, that you will get from us best product, designed to your need exclusively.