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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 ...

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. 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. 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. FLR (Flat Lead plug Rubber) device device This is a dam...

JUC method This method is used to create one new tunnel branching off from another tunnel or to join one tunnel to another tunnel without constructing a vertical shaft. By using this method, the effects of tunnel renovation or excavation work on the surrounding environment can be significantly reduced and the work period also shortened at the same time. With this approach, special segments are installed in the tunnel to be worked on first so that tunnel branching or joining work can be done using ordinary shield machinery. P&PC segment method and ring lock segments With the P&PC segment method, a prestress force is applied circumferentially or in the direction of the tunnel axis to bring installed segments into firm contact with each other thereby forming a solid tunnel structure. The P&PC segment method, which was developed to construct shield tunnels, is not only cost-efficient but also very effective for constructing tunnels in land subject to high in...

"MiFT200"-a next-generation construction method for high-rise housing MiFT200 is a new construction methodology that has made it possible to build collective housing rising to 200-meters or higher, the highest collective housing in Japan. Because collective housing constructed with this approach has an SI (Skeleton Infill) structure, a high level of structural durability and earthquake resistance can be realized. Features of high-rise housing built with MiFT200 are an astylar living space (a large space without columns), free planning, flexible renovation, and so forth. "CWIWC (Controllable Wide Wall Column) method"-a high-rise tabular housing construction methodology The CWIWC construction method was originally developed by us. By using this approach, high-rise tabular collective housing with 20 or more floors can be constructed. The collective housing built using this technique is highly aseismic as the structure incorporates a quake-resistant wall tr...

STEPS FOR SAFE DESIGN AND CONSTRUCTION OF   MULTISTOREY REINFORCED CONCRETE BUILDINGS - PART 2 2.5 Heavy Water Tanks on the Roof: Heavy water tanks add large lateral inertia forces on the building frames due to the so called ‘whipping’ effect under seismic vibrations, but remain unaccounted for in the design. See the fall of such water tank in Fig.10 Fig.10 -  5 storey R.C., collapse of open plinth, water tank at top dislocated (Bhuj) Recommendation :- All projected systems above the roof top behave like secondary elements subjected to roof level horizontal earthquake motions which act as base motions to such projecting systems. To  account for such heavy earthquake forces, IS:1893-2002 (Part 1) provides in clause 7.12 that their support system should be designed for five times the design horizontal seismic co-efficient A h specified in clause 6.4.2. Similarly any horizontal projections as the balconies or the cantilevers supporting floating col...