VISOTECH VISOTECH. Phone: ABN: as published on

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1 VISOTECH Phone: ABN: VISOTECH as published on For the latest version of this content visit:

2 Table of Contents Table of Contents Vibration Isolation Systems 1 Applications Vibrations can be controlled wherever they happen. 1.1 Floating Floors Basic Spring Element Systems 1.2 Gas and Diesel Generators 1.3 Buildings 1.4 Earthquake Protection Benefit from Experience of Many Decades Protecting Highly-Sensitive Facilities 1.5 TMDs for Bridges 1.6 Machinery and Equipment 1.7 Floating Slab Track 1.8 Piping Systems 1.9 Printing Presses 2 Featured Projects 3 About 4 Contact 4.1 Contact Us

3 Vibration Isolation Systems VISOTECH is an Australian company specialising in the supply of vibration isolation systems Australia wide. 3

4 1 Applications Tuned Mass Dampers under Millenium Bridge in London Vibrations can be controlled wherever they happen. VISOTECH is an Australian company specialising in the supply of vibration isolation systems. From small pumps and generators to entire buildings. VISOTECH can treat all vibration issues. Backed by GERB, the German experts in this field, VISOTECH now makes these latest technology high quality systems available to our Australian and New Zealand customers. The advantages offered by GERB systems are highly sought after by mechanical contractors and acoustic specialists. In situations where up to 99% vibration isolation is required, such as hospitals or office complexes, springs are extremely capable solutions. This is why Visotech Australia supplies GERB spring isolation systems to some of Australia and New Zealand's most sensitive and high profile projects. Visotech Australia, backed by the expertise and 100+ year experience of GERB engineers, can design and supply the most sophisticated custom solutions to address excessive vibrations. Visotech Australia vibration isolation systems range in size. The smallest spring systems are used for small plant and equipment such as pumps and generators. The largest spring systems are used to support entire buildings or power stations. No application is too large for GERB technology. Visotech also designs and supplies high-tech visco damper systems. These are used in pipe systems and any application where damping rather than isolation is the main concern. 4

5 Another specialised application where Visotech/GERB can assist is with the design and supply of tuned-mass dampers. These are used to conteract sway induced by wind or humans in structures such as pedestrian bridges or tall buildings. This complex area of engineering is one of GERB's great stength. This is recognised by the fact that GERB tuned mass dampers have already been used extensively on some of Australia's most iconic recent projects. Rail isolation is also a major field of activity for Visotech/GERB. The floating slab track systems are particularly interesting solutions for highly populated areas. Of course, solutions to isolate buildings from the vibrations generated by rail in close proximity are also very common. GERB has extensive experience and project references for such projects. A recent addition to the GERB range of specialised solutions is a spring damper combo custom designed for the vibration and acoustic isolation of swimming pools. The design of concrete swimming pools in multi-residential high-rise complexes is becoming the norm. But when these pools are above inhabitable space, the noise and vibration at pool level needs to be eliminated. GERB has developped a solution that gives 98% isolation, but also limits the height required under the pool shell to only 150 mm! The springs are delivered pre-compressed, allowing for minimal deflections under emptying and filling cycles required for the maintenance of the swimming pool. A new product also developped by GERB for the Australian and New Zealand markets is a range of seismic spring mounts with internal restraints. Designed to meet the requirements of AS1170.4, these mounts can also include internal damping in the form of Sordino wrap or separate fluid dampers. This range is perfectly suited to gensets in hospitals and any other disaster recovery infrastructure. 1.1 Floating Floors 5

6 Embedded jack up Spring Elements Floating floor and room-within-a-room structures VISOTECH Australia represents state-of-the-art technology to control vibration and structureborne noise within buildings. This technology is used to separate TV, broadcasting or recording studios, recital & rehearsal rooms as well as theatres, discos, fitness studios and HVAC areas dynamically and acoustically from the surrounding environment. For more than 50 years GERB has been innovating and developing spring elements for floating floor and room-within-a- room structures based on the application of steel coil springs. This system guarantees highest attenuation values due to extremely low system natural frequencies. At system natural frequencies ranging from 7 Hz down to 2.5 Hz GERB steel spring elements provide the most efficient solutions in protecting highly sensitive areas from mechanical vibration and structure borne noise. Mitigation of structure borne noise and vibration starts at frequencies as low as 4 Hz thus giving the GERB system an advantage over elastic pad material. Basic Spring Element Systems GERB offers a variety of spring element systems for floating floors. In addition to a large number of steel springs of different elasticity and load capacity there are several element systems available designed for a wide range of applications: 6

7 1. Embedded jack up Spring Elements Embedded in the concrete slab, jack-up type spring elements are a preferred choice in terms of simplified installation, high flexibility/readjustability and low system height. 2. Supporting Spring Elements Supporting type spring elements arranged below the floating slab are designed to carry high and concentrated loads and can easily be adjusted to the actual loads if required post installation. All spring elements can be provided with additional damping thus further improving the system s damping and attenuation performance. 1.2 Gas and Diesel Generators Spring Unit with Viscodamper and Spring Supported Gen Set (MHI) Elastic Support of Gas and Diesel Generators Large gas and diesel engines are used for many purposes, i.e. trains, ships and for local power generation. In all cases, foundations for these engines must be both economical and effective. Elastic support of this equipment meets these requirements. Visotech Australia has been working with some of Australia's leading mechanical contractors on various co-gen and tri-gen power plants on high profile projects recently. GERB spring isolators are specified and used because they provide up to 99% vibration isolation. This high isolation is paramount in buildings such as hospitals or high-end office complexes. During operation, some of the oscillating forces and moments generated by the engine are balanced internally; remaining forces and moments are transmitted into the foundation. 7

8 Normally, both the engine and generator are arranged on a common rigid foundation. In case of small equipment this would be usually a steel frame. Larger generators usually have a concrete foundation that is often provided to balance the dynamic forces of the engine with a corresponding mass resp. to channel the dynamic and static forces into the subsoil or substructure. However, even a massive concrete foundation will not prevent the transmission of dynamic forces into the subsoil and therefore effecting the building and its surroundings. This can create vibration problems. While settlement problems can be solved with an expensive pile foundation, the transmission of disturbing dynamic forces can rarely be limited with conventional foundation methods. Any subsequent alteration of the foundation is expensive, and in any case this requires tremendous work and a shut-down of the generator for quite some time. GERB Spring-Viscodamper combinations allow the installation of diesel generators in almost any location: whether in the sub-basement of a hotel or on the 30th floor of a high rise building, in a diesel centre or in a Nuclear Power Plant. Dynamically uncoupling the machine foundation from the substructure using spring elements and Viscodampers - provides an excellent solution to eliminate vibration and structure-borne noise at the source and to protect the immediate vicinity and neighbouring buildings. The GERB system provides the following advantages: The machine foundation is dynamically uncoupled from the surroundings with high isolation efficiency (up to 98%) The transmission of structure-borne noise is virtually eliminated The foundation mass and therefore the foundation size can be substantially decreased. Ground water problems can be avoided with a foundation that does not require a deep pit. Spring elements can be easily adjusted in case of substructure settlement. The size of the diesel generator building can be reduced. The elastic support system can be designed to protect gas and diesel generators against damage in seismic zones. 1.3 Buildings 8

9 Spring supported cinema building close to a railway station Siegburg, Germany Vibration Isolation of Buildings The isolation of entire buildings from outside vibrations is a very specialised field of expertise. Visotech Australia/GERB have been working on such projects for many years now, all over the world. We can work with architects and engineers to design and supply vibration isolation systems customised to each project's exact requirements. As population density increases in major cities in Australia and New Zealand, attractive plots in central and convenient locations often come with a major disadvantage specifically, vibration or structure-borne noise that might be caused by: Metro or other well used railway lines, heavy truck traffic passing by on uneven roads or nearby bridges, heavy machinery being operated in neighboring industrial facilities. Noise and vibrations can significantly reduce the general value of properties. And quite often the extent of ground-borne vibration tends to be initially underestimated. Indeed, it is only once the building has been completed that the consequences are fully felt with floors vibrating, and walls and floors becoming the radiating surface of secondary noise. Unfortunately, subsequent counter-measures are often difficult to implement or even outright impossible or if there is a solution it is likely to take up considerable amounts of time and money. Therefore, to avoid costly problems in the future, it is imperative that both the building owners and architects consider this highly important issue at an early stage. The reality is that conventional foundations cannot do much to prevent the transmission of 9

10 disturbing vibrations onto the building. Measures at the vibration source are often not possible or insufficient. Furthermore, structural measures taken in the building seldom prove to be successful and may actually constrain the creativity of the architect or building owner, or alternatively the functionality of the building. Eventually, to eliminate risks for people, machines or buildings, it might well become necessary to implement special measures to the building s foundations, whether it be a residential or office building, a hotel or retirement home, a concert hall, conference center or a modern facility with vibration-sensitive production. GERB base isolation by steel spring support gives you such an opportunity. 1.4 Earthquake Protection High Voltage Reactors with Earthquake Protection California, USA Earthquake Protection for Machinery, Buildings and Equipment With the Newcastle earthquake and the more recent Christchurch event in mind, Australian and New Zealand architects and engineers are taking earthquake protection of infrastructure and buildings very seriously. Visotech can help with very the design and supply of specific and customised earthquake protection systems. Numerous countries have to live with the constant threat of earthquakes. Not only are machines, technical equipment, buildings in danger of being damaged or destroyed, but life-essential facilities and human life itself are also at risk. GERB has taken up the challenge of providing solutions that protect against such natural disasters. Engineering, project development, suitable devices and all necessary support can be supplied from a single source. 10

11 Benefit from Experience of Many Decades GERB has been supplying earthquake-proof, visco-elastic devices for heavy machinery of various kinds for decades. For example, appropriately designed elastic supports have been protecting turbo generators in both conventional and nuclear power plants in many countries against damage from earthquakes. These ideas have been developed consequently, and nowadays efficient seismic protection strategies can be provided for machinery, technical equipment, buildings and many other kinds of structures. Spring elements and dampers are effective against ground settlements, vibrations and structure borne noise and can successfully be used for earthquake protection purposes. During many years, it has been proven that machines, equipment and buildings with such devices have survived powerful earthquakes in many seismically prone areas of the world. Protecting Highly-Sensitive Facilities GERB s fields of activities include providing solutions for reliable protection against earthquakes for conventional, nuclear and petrochemical facilities as well as high-voltage installations such as substation equipment and other fields. Natural earthquakes with combined horizontal and vertical excitation frequently produce very high stress and strain levels in structures as well as unacceptable accelerations. Systems comprising helical spring elements and Viscodampers have proven to be particularly suitable against these effects. 11

12 1.5 TMDs for Bridges Millennium Bridge London, GB (Vertical TMD and Horizontal TMD) Tuned Mass Dampers for Bridges, Buildings and other Tall Structures Wide span structures such as bridges, stairs, and roofs, as well as tall, narrow structures such as chimneys, antennas, masts and buildings, can be easily excited to high vibration amplitudes in their first or higher eigenforms. Excitations can be caused by wind forces, pedestrian traffic, machinery or earthquakes. Natural frequencies and damping are typically low for these structures. With GERB tuned mass dampers (TMD), these vibrations can be easily reduced. All GERB TMDs, both vertical or horizontal, have three main components: Spring or pendulum Oscillating Mass Viscodamper (viscous fluid damper). Every TMD is exactly tuned to the main natural frequency of the structure. Although TMDs have been well-known for a long time, it is still difficult to provide exact tuning and predefined system damping. Furthermore, the three components must not change their dynamic properties over time, even when exposed to variable weather conditions. GERB has worldwide success in designing and manufacturing TMDs with masses from 20 to 10,000 kg, and vibration frequencies from 40 to as low as 0.3 Hz. To protect against vertical vibrations, GERB TMDs are equipped with helical compression springs and Viscodampers. For horizontal and torsional vibrations, GERB supplies TMDs with leaf springs or pendulums, and Viscodampers. 12

13 1.6 Machinery and Equipment Air Conditioning System with Spring Units Elastic Support of Machinery and Equipment The most common use of Visotech GERB vibration isolation solutions in Australia and New Zealand is with plant and equipment. Eliminating these vibrations is important both for the health and safety of workers near these machines, but also for the machines themselves. Excessive and long-term vibrations can cause undue wear and misalignment in plant and equipment, requiring expensive repairs or full replacement, as well as shut down time. From small pump and gensets to large coal crushers and printing presses, Visotech can design and supply a GERB vibration isolation system to eliminate up to 99% of vibrations. Compressors Reciprocating compressors have major moving masses (piston, connecting rod, crank shaft), which are in many cases not very well balanced. While balanced multi- cylinder compressors can be installed in most cases directly on springs with only a steel frame as an interface, 1-cylinder machines need a rather big additional mass to limit the dynamic response deflections, which could be a concrete foundation or a steel plate. Compared to a conventional installation, elastic support with GERB spring elements will provide typically a 90% vibration control effect.rotating compressors are typically better balanced and run with higher speed. In case of a conventional installation they often cause a high level of structure borne noise. When placing these compressors on GERB spring elements, this noise will be completely suppressed. Crushers, Mills and Shredders 13

14 Depending on the type of equipment and dynamic loads in vertical and/or horizontal direction, these machines need an additional foundation, which in case of elastic support will reduce and limit the system response amplitudes resulting from shock, random or periodical excitation. This foundation will also increase the overall stiffness and stability of the system. Fans The most common fans are ID-, FD- and PA-fans of axial as well as centrifugal type. Their imbalances caused by wear and tear during operation result in periodical dynamic forces, which are fully transmitted into the foundation and beyond. Therefore, fan foundation design must consider not only static but also these dynamic loads resulting ultimately in a foundation concept which is practical as well as acceptable in both the technical and economical way. Spring support of fans can conveniently meet these requirements. World-wide acceptance of this concept as a state of the art technology is of course our best evidence. Conventional fan foundations typically require very massive RCC-blocks but this huge mass alone cannot stop the transmission of vibration into the soil/surrounding at all. It is mainly meant to suppress the detrimental effects of unintentional system resonances, which cannot be ruled out in this case, with very little knowledge of the exact dynamic properties of the soil. Furthermore there is also the risk of settlements, especially uneven settlements due to these vibrations. It is, therefore, common practice to support the conventional foundation at several meters below ground level where the soil bearing capacity is much more than adequate for just the static loads. Such a conventional foundation should therefore be replaced by a better alternative. GERB recommends dynamic uncoupling of the fan foundation from the soil by means of spring units equipped with high quality, fatigue free coil springs and non-ageing Viscodampers. This system provides the following advantages: Instead of a massive RCC-block, the fan foundation is reduced to a RCC-slab of very limited thickness and the dynamic behaviour of this system can be exactly calculated. System natural frequencies are far away from the speed of the fan ensuring a very smooth running of the fan itself. The fan foundation can be dynamically fully uncoupled from the sub foundation and soil. The vibration isolation efficiency is very high and may reach more than 90%. The substructure below the spring system can be designed for the dead load of the machine and its RCC-deck only. It may be reduced to either walls or frames which will conveniently rest on the soil without settlement problems. Piles, wherever required for a conventional foundation, can be greatly 14

15 reduced in numbers or even fully eliminated. The highly flexible spring support combined with Viscodampers will even result in lower stresses in the machine itself i.e. an increase in bearing life, longer maintenance free periods and higher machine availability. This foundation concept represents, therefore, an economic and timesaving solution providing besides good vibration isolation an excellent protection against settlements and even against earthquakes. The danger of uneven settlements is greatly reduced due to following reasons: The soil is only statically loaded, while most settlements after commissioning are caused by dynamic loads Up to a certain extent uneven settlements are automatically levelled out due to the flexibility of the springs. If settlements should in spite of all this reach critical dimensions, they can easily be corrected by shimming on spring level in a few hours. Condensers The spring support of a condenser is not for the purpose of vibration control, but to reduce the load reaction caused by its heat expansion in the connected equipment, for example a turbine nozzle. GERB spring elements provide sufficient elasticity to limit such reactions to a permissible level, preventing in this way high cost for analysis and design of the connections or for expensive bellows. Boiler feed Pumps Boiler feed pumps are basic power plant equipment. The driving part (motor or steam turbine) is connected directly or via a gearbox with the pumps.if these pumps are elevated - in earlier days they were generally sitting on ground level - it is very economic instead of giving them separate table foundations to integrate them into the structure of the turbine building. In this way spring elements and Viscodampers are the interface between the equipment (together with its foundation) and the building.although the speed resp. speed range of boiler feed pumps is typically high (> 1000 RPM), the springs have still to be very flexible to guarantee an efficient uncoupling of the spring supported system from the substructure. GERB spring elements can easily be adapted to such requirements. Steam Turbines The elastic support system for turbine generator foundations has been widely accepted during the past 30 years by the industry. The GERB system jointly developed with leading turbine manufacturers - was applied for the first time in the German Nuclear Power Plant STADE in

16 to support a 660 MW turbo generator. Presently, this system is used world-wide on turbines with capacities up to 1300 MW. Leading manufacturers of turbines and other power plant equipment using the GERB system, emphasise the following advantages: The turbo generator foundation is dynamically uncoupled from the substructure, More space below the turbo generator for the arrangement of condensers and piping. Integration of the substructure into the building, which consists of the beams and/or columns, Reduced construction costs for the basemat, Shorter construction time for the foundation By reducing the dynamical loads risk of settlements is reduced, Easy adjustment and realignment in case of settlements. Adjustments can be carried out without interrupting the operation of the machine, Protection of the turbo generator in case of earthquakes. Gas Turbines Big conventional gas turbine foundations are prone to settlements, especially on bad subsoil, which may lead to problems in operation and/or additional stresses in the foundations. Their elastic support on GERB spring elements will prevent that. Subsequent alignment of the system on spring level - without touching the machine - is easy and simple, in many cases even while the gas turbine is running.the GERB spring system can also protect the gas turbine in case of earthquakes, if combined with Viscodampers.An excellent basic vibration control effect of the spring system is also obvious, which is especially important when the gas turbines are installed on power barges. Transformers Transformers cause vibrations of 50 Hz, 100 Hz and higher frequencies, resulting in structure borne noise, which is mainly disturbing when installed in substations located in residential areas. The elastic support of such transformers on GERB spring elements will provide an excellent vibration and structure borne noise control.a special detail of such elements is the possibility to fix rails directly on their top plate. That allows an easy and simple installation as well as the rolling of the transformer into and out of the substations. Pipework Dampers Piping systems in power - or chemical plants are complex dynamic structures. Vibrations are often the reason for failures and damages. They may be generated inside these systems during normal operation by numerous sources, such as, hydrodynamic forces or pressure pulses when 16

17 valves are opened or closed. Connected machinery, like pumps and turbines, may also transmit vibrations. Excitation may also come through the supporting structure from external sources, for example, in emergency cases such as earthquakes and explosions. In these cases, the results may be excessive displacements and stresses, which can damage the piping system. Even operational vibrations with very small amplitudes may lead to material fatigue and endurance failure. Based on decades of experience in design and application of VISCODAMPERS for vibration control of machinery and other industrial equipment, GERB has developed Pipework dampers for the protection of piping systems. These Pipework dampers provide a number of advantages compared to other dynamic restraints: Reduction of operational as well as shock induced vibrations in all degrees of freedom. Immediate reaction to vibrations without delay or time lag. Velocity proportional characteristics: High forces to counteract shock loads. Low forces in case of low motions, for example, thermal expansion. Simple in design and handling. There are no parts subject to wear and tear. They are maintenance free and have a nearly unlimited lifetime. Normally Pipework dampers accommodate motions of ± 40 mm in vertical and horizontal direction. Dampers for larger displacements are available. Type VES Pipework dampers are performance tested by thegerman TÜV and the Swedish S.A. for use as standard parts in nuclear power plants. In addition to the performance tested VES dampers, elements with similar characteristics are available for non-nuclear applications and for wider temperature ranges (outside application). Custom-made dampers for special requirements, for example in the offshore industry, are also available. 1.7 Floating Slab Track 17

18 GSI-system and GSI-housings in place Vibration Isolation by Floating Slab Track Systems GERB Floating Slab Systems are successfully installed in tunnels, above ground, and on elevated rail tracks. Different types of springs and spring elements are available to meet the requirements set by the respective conditions on site and by the type of trains, including: trams, urban mass transit systems, heavy freight trains, high-speed passenger trains. Due to the high elasticity of the steel the springs, GERB floating track slabs combine two essential features: 1. highest possible efficiency of isolation 2. a cost-saving low construction height. GERB Floating Slab Track Systems make a classical "Heavy" Mass-Spring-System look old. There is no longer need to waste space and money on massive and bulky concrete slabs requiring spacious and expensive tunnels. In addition, they offer a number of benefits by a simple and cost saving installation. 18

19 1.8 Piping Systems Typical GERB pipework damper and Installation of a pipework, damper type VES Vibration Control of Piping Systems Pipework dampers are frequently used for the protection of piping systems and other components in power plants and industrial facilities. GERB pipework dampers are highly effective viscoelastic elements, well proven in numerous installations. Already in 1951 Viscodampers were patented for pipe applications. Practical experience in power plants shows that the reliability and life expectancy of piping systems are largely determined by their dynamic characteristics and behavior. Dynamic loads are experienced during normal, continuous operation and during abnormal, potentially disastrous situations. Hydrodynamic forces and pressure pulses, i.e. due to abrupt opening or closing of valves, cause vibrations of piping and aggregates as do connected pumps, compressors, or turbines. In addition, external excitations caused, for example, by disastrous events like earthquakes may be transmitted to the piping through the support structure. In all cases the resulting pipe deflections can be excessive and permissible loads may be exceeded. As piping systems have only small internal damping, dynamic excitations are especially critical when frequencies match the natural frequencies of the piping system. In such cases piping motions may be amplified due to resonance effects. But also operational vibrations with relatively small deflections can cause material fatigue and pipe damage. Based on the experience in design and application of Viscodampers for vibration control of 19

20 machinery and structures, an element was created that shows several advantages compared to other standard pipe supports: pipework dampers reduce vibrations in all degrees of freedom. pipework dampers develop high damping forces in case of shock loads, whereas slow motions are not hindered. pipework dampers reduce operational vibrations by selectively increasing system damping. pipework dampers react to vibrations immediately without delay or time-lag. pipework dampers are simple in design and handling and therefore cost-saving. There are no parts of wear and tear, and they are maintenance-free. 1.9 Printing Presses Typical Spring Unit with Viscodamper and Spring Support of a manroland Printing Press Elastic Support of Printing Presses Owing to their high-speed rolls, rotary printing presses cause vibrations In the machine itself as well as in its foundation. Therefore, in many cases right up to the present a large concrete foundation is foreseen which can be placed on piles should the subsoil be unsatisfactory. Settling and torsion of the foundation and thereby of the machine as a result of these vibrations are supposed to be kept to a minimum through these measures. To isolate high-frequency structureborne noise, some pad materials are also sometimes used although these are only slightly elastic. Even with theses precautionary means, however, settling cannot be strictly ruled out. Besides, inadmissible vibrations can be transferred via the foundation into the surroundings and may there affect the plant personnel and the environment. In extreme cases the vibrations can even be damaging to parts of the plant building. 20

21 In order to prevent these effects it is necessary that a dynamic uncoupling be made between the machine and the building itself by means of an elastic support. GERB spring units in combination with Viscodampers are especially well suited for this: Owing to the uncoupling with a high vibration-isolating effect between machine and structure, the subsoil is only statically loaded. Settling as a result of machine vibrations is ruled out. Settling which is externally caused can be quickly and easily counteracted at any time with highly elastic support. For this purpose GERB spring elements are made pre-stressable so that with the help of small hydraulic jacks inserted into the spring elements, steel shims can easily be put into the gap between the compressed spring element and the spring-supported machine. 21

22 2 Featured Projects Some of VISOTECH's recent projects include: Yallourn W power station - coal crusher mounts 180 Ann Street, Brisbane - Seismic spring dampers for cogen plant. Anzac Parade Pedestrian bridge, Sydney - Tuned mass dampers x 4 Loy Yang B power station - coal crusher mounts 567 Collins Street - cogen plant isolation New Queensland Childrens Hospital, Brisbane Queensland Spring isolators for Gen-sets. Tank Street Bridge, Brisbane Queensland - Tuned mass damper. Conservatorium of Music, Sydney NSW, - Recital halls supported on springs. Loy Yang A Power station, Melbourne Victoria - Spring supports of coal crusher units. Northern Power Station, NSW - Spring supports of coal crusher units. 22

23 3 About Visotech Pty Ltd is a specialist vibration isolation design and supply company based in Australia. Xavier Delattre is the Owner and Managing Director of Visotech Pty Ltd. Xavier is a qualified professional engineer with versatile and worldly experience. Educated in Europe and Australia, he is bilingual. Xavier s expertise in Engineering was gained mainly around bridges in the early years. He started his career designing world-class bridges in Thailand and the United States. His interest brought him to specialise in the articulation and vibration isolation of bridges. This knowledge lead Xavier to manage various bridge bearing and expansion joint businesses around the world. In recent times, involvement with vibration isolation has given Xavier a more defined area of capability and competence. Over his career, Xavier has developed into a confident, innovative and inventive engineer and solution provider. His analytical and principled approach to his work coupled with his trustworthy and ethical nature combine to make Xavier an efficient and successful business owner. For more details please visit Xavier Delattre s profile on Linkedin. 23

24 4 Contact (form at Contact Us Xavier Delattre Owner and Managing Director Visotech Pty Ltd Australia T: E: 24