2 VST – Composite Permanent framework system The development of the patented VS composite formwork system began back in the early 1980ies. Up to this day we have implemented hundreds of housing projects, hotels, restaurants, business and industrial buildings, leisure facilities and social institutions all over the world by using this technology.The experienced team of engineers has determined a goal - to develop the VST System, which would become a leader in the construction market
3 VST System technologyThe patented VST-System is based upon the principle of permanent formwork, where the formwork stays in the object after all works on site. The casings of the VST system are made by 24mm thick cement bonded particle boards (CBPB), the boards are assembled in the VST-factory in one finished item. Prior to joining the boards the reinforcement steel is placed according to the project in the panel. To join the plates a special patented steel profiles are used which are attached to the boards with special steel bolts. Application of aforementioned profiles ensures even panel thickness and admission of pressure until complete concrete hardening has occurred.The wall and slab elements are acting together as composite shell they will be assembled together on site and will finally be poured with concrete (self compacting concrete) to get their final stability. The CBPB remains from both sides in the building as permanent formwork with high quality pre finishing.This system is used for walls, ceilings, stairs and other special element creation.Constructing with VST system retains all advantages of reinforced concrete panel constructionHigh resistance against pressureHigh resistance to the tensile strengthHigh resistance to dynamic loadsAt the same time the benefits of wooden buildings are not lost:Necessary favourable micro climate for livingSmooth surface temperature of the CBPB
4 VST System advantages compared with traditional building methods 1. Short construction timeThe VST system requires very short times for erecting raw superstructures. The simple and effective assembly of the panels on site and the omitting of striking-out the frame work and basic-plaster work including dry-out periods, will shorten the process time on site down to 50% compared with traditional systems. Also finishing works can start in relatively short period of time after concrete has dried out. Assembly time of Multi-storey building of one floor of m2 for 5 people worker team is one week.2. High qualityThe assembly quality and accuracy is measured in mm. Before painting or wallpaper adhesion, internal wall finishes require only minimal internal seam finish. Exterior walls require minimal catch-adhesive consumption for heat isolation strengthening. As the system offers high level of exactness, the final object will be accurate the security risks are reduced to minimum, therefore significant reduction of insurance costs is possible.3. Size variations and opportunities of large-scale coverageBy using VST system there is great potential to create a specific panel sizes designed specifically for each object. The system allows reducing the need for columns.4. Correction of communicationsIf the customer desire requires changing an existing electrical location, there is possibility of adjustments before concrete – filling, because everything is transparent and adjustable.5. Little space requirementsThere are advantages to build in urban, density populated areas panels will be delivered and assembled just in time, no additional space needed, for storing the materials or specific building equipment.
5 VST System advantages compared with traditional building methods 6. Particle board functions depending on the seasonThe boards act like a jacket and protect the concrete against frost in winter or against too quick dry out in summer. The reduction of working time in winter leads to cost reductions.7. Concrete has high stability and sound insulationDue to the fact that the whole building is monolithic concrete casting, such a system construction is regarded as stable and reliable in earthquake regions.8. Low load capacity handling equipment necessityTaking into account that in the building site will be moved and assembled empty panels, the freight moving equipment can be with low carrying capacity, as well as costs will be reduced because of relatively short mounting time.9. Complete absence of construction waste after assemblingCleaning and waste will be minimised significantly as well, therefore the costs for waste management will be close to zero.10. Low cost of transportation from the factory to the building site, due to the small cargo weightOne track is for up to 100m2 (building useful area). Transportation costs do not exceed 15 EUR per m2.11. Building conditions suits nearly all weather conditionsDue to the fact that 60% of the entire processes take place inside the factory therefore into secure surrounding, on building site there is only mounting and concreting. Consequently, the reduced dependence on weather conditions and at the same time costs.12. The most important is the fact that all the aforementioned advantages are significantly reducing the total construction costs and completion times.
6 VST system advantages compared with reinforced concrete building methods VST-System-panel light weight allows the saving of transport and assembly costs. One track is for up to 100m² (building useful area). Transportation costs do not exceed 15 EUR per m².The concreting will be done on site; therefore VST System will not have any joints between the panels, compared with the finished panel assembly.The walls and the slabs will be poured together and create a massive concrete structure.If there is a need to reduce the size of a room during the construction, than it is very easy to transform the current panel in to desired size.Communication corrections. If the customer desires to change an existing electrical location, there are possible all types of corrections, before concrete filling. From the top everything is transparent and adjustable.
7 VST wall system technical description The patented VST-system is based upon the principle of permanent formwork, where the formwork stays in the object after all works on site. The shells of the VST- system are formed by 24 mm thick cement bonded particle boards (CBPB). They will be assembled in the VST - factory in several processes in an industrial way. As the connecting elements only self- developed steel clips (spacers) will be utilized. The spacers will be fixed with galvanised screws on the inner face of the Board without any appearance on the visible side. All the connections between the single VST- walls will be created as an 8 cm wide and 1-2mm deep mill or a 12 mm wide and 6 mm deep V- shaped joint. On building site the joints should be treated according to supplier’s instructions. All VST – Wall elements will be fully manufactured and fitted with lifting units and placed in special transportation cases.
8 VST wall system technical description VST – Walls can be used for vertical or pitched use on siteAll needed openings (doors windows, etc.) and wiring will be built in at factory according to the project.Reinforcement will be built in at factory according to drawings or requirement for each projectStandard Wall types:1. D=17,5cm (d=12,7cm);2. D=20,0cm (d=15,2cm);3. D=21,5cm (d=16,7cm);4. D=23,0cm (d=18,2cm);5. D=25,0cm (d=20,2cm);6. D=30,0cm (d=25,2cm).The overall thickness of the VST – Wall D (measurement in architectural drawings) element will be given by the thickness of the concrete core d and the thickness of the CBPB on each side.Other wall thicknesses can be manufactured after request and reconfirmation.
9 VST – Slabs technical description The VST-Slab elements type HT consists from CBPB (thickness 24mm) and special cap - profiles for horizontal or pitched slab areas. The single slab – elements will be assembled in factory to packages of maximum size 2,4m x 6,00 mThe cap-profiles will be screwed on top of the CBPB with screws 5/24mm in a distance of 40,0 cm. Height of cap – profile is 50 mm, total height of VST-slab-element is 75mm. The reinforcement bars size is calculated according to following calculation: 3,93cm2/mThe bottom surface of the slab must be treated according to supplier’s instruction
10 VST system special element description With the VST formwork solution all elements of load-bearing structure can be provided. In addition to main construction elements we can offer:VST fringe boardsVST column elements (rectangular or quadratic) based upon structural analysis, reinforcement will be fitted into the VST element in factoryVST beams elements (rectangular or quadratic) based upon structural analysis, reinforcement will be fitted into the VST element in factoryVST stairs elements - straight flights and landings including fringes to form risers, reinforcement will be fitted into the VST element in factoryVST capitels (shear heads) – to raise resistance against punching of slabsVST window boards – solution to provide the possibility to place a window in the thermal insulation areaVST wall heating – a special pipes (hot water) built into the wall panels, creating a wall heating elements (including all necessary taps and connections) fully compliant to thermal requirementsVST corners and T-crossing details – providing the possibility to build in reinforcement on site