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LRI (Lead Rubber Isolator) device
This is a base isolation device that has thin rubber sheets and steel sheets laminated in a circular form with a lead plug inserted in the center. This device is able to withstand loads, absorb seismic energy, dampen vibration during an earthquake, and then reset itself to the original position following the seismic event.
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CLB (Cross Linear Bearing) device device
This is a load-sustaining device that moves smoothly in a horizontal direction. It can be used either with lightweight or heavy buildings and features a high bearing capacity against the pullout force.
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Vibration damping walldevice
This is a thin steel box with a steel plate inserted from the upper floor.
It is fixed on the floor and filled with a viscous fluid. It has a simple structure and can be used to attenuate the vibration caused by wind, earthquakes, and other movement-generating phenomena. |
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FLR (Flat Lead plug Rubber) device device
This is a damping device that consists of laminated rubber sheets with a lead plug inserted in the center. The area that the lead plug occupies is larger than that of the lead plug in the LRI device. Although it is small in size, it produces a large damping effect and is used to control the vibrations in a high-rise building caused by earthquakes.
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Damping cylinder device
This is a cylindrical attenuates device that dampens vibration by converting and expanding micromotion in an axial direction to rotational motion. The unit itself is small in size but very powerful and is used to attenuate vibrations, caused either by wind or earthquake, in structures ranging from high-rise buildings to steel towers
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Suspended floor aseismic insulation
The floor is suspended from an upper structure to control
horizontal and vertical vibration. This approach has been adopted, for example, to construct the floor of an electron microscope room where the requirement is to control vibration with a precision of microns. |
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PSA
This is a viscous damping device designed to increase viscous resistance using a communicating tube. Because it has a pantographic mechanism, it produces a powerful damping effect and is able to attenuate not only microvibration but also earthquake motion.
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Typical Construction Sequence for Mechanical / Electrical / Plumbing Works in High Rise Building Grouping of MEP Fixes like PVC Electrical conduits in Slabs : 1. MEP 1st Fix - All Concealed Items/Pipe Sleeves in Verticals/Horizontals (Column/Slab) 2. MEP 2nd Fix - Stage 1: High Level MEP Works at False Ceiling i) Fixing supports, installation of Firefighting, Chilled Water piping, drainage pipes, water supply(hot & cold), rain water, cable ladders, G.I Conduiting, AC ducting ii) Pressure tests and insulations iii) Installation of FCUs, water heaters (Note: False Ceiling people will fix runners after the Stage 1 of MEP 2nd Fix) 3. MEP 2nd Fix - Stage 2: Clearance for False Ceiling People i) Sprinkler droppers, AC duct droppers, flexible cable for light fixtures, fire stopping and identification works etc. (Note: False Ceiling people will close ceiling tiles and MEP people will connect their diffusers in position on the ceiling tiles - too much coordination is required at
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