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Lift Slab

            
             LIFT SLAB is a method of building construction in which the reinforced concrete floor and roof slabs of a multistory structure are casted around its columns at floor level using a separating medium between each slab and employing the ground floor as the initial casting form. .
             The Equipment.
            
             • A lift slab jack consists of hydraulic ram and two horizontal cross members.
            
             • Two high tensile steel lifting rods are located symmetrically about the jack passing through the cross members and connect the jack to the structure being lifted. These rods are threaded throughout and may be assembled into any length by means of any couplers.
            
             • The 60 tons capacity jacks are operated by hydraulic oil under pressure supplied from a motorized power unit. .
            
             • Electrically operated solenoid valves in a hydraulic distributor from which flexible hoses are used to complete a number of ring main supplies control oil flow to the jacks.
            
             • An electrical control unit monitors the operation of each jack and controls the solenoid valves of the hydraulic distributor.
            
             • Through the electrical control panel the action of all jacks is asset is completely synchronized and both lifting and lowering cycles can be undertaken under automatic control.
            
             • Two nuts on each rod are rotated automatically to maintain in contact with the upper and lower crossheads of the jacks ensuring that structure being lifted has complete mechanical support at all times and is never independent upon hydraulic support alone.
             Construction Sequence.
            
             • Foundation construction follows traditional approach and usually incorporates a pocket for the erection of the pre-cast concrete column that are carefully aligned, plumbed, and grouted into position with the steel collars threaded to them.
            
             • The slabs are being poured and steel collars are being connected to each slab while casting of concrete.


Essays Related to Lift Slab

1. How to Dance the Tinikling

Lift up both bamboo poles on the same side enough to place one of the wooden slabs directly underneath the raised ends. ... Lower the raised ends of the poles until they rest on the wooden slab with only a few inches of the poles overlapping it; adjust the wooden slab until it lies perpendicular to the bamboo poles. ... On beat three, the dancer lifts the right foot up, avoiding the collision of the two poles as their ends glide along the wooden slabs. ... Dancer lifts the left leg by bending left knee into a 90-degree angle the moment the right foot hits the ground. 4. ... The mome...

  • Word Count: 1463
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2. Pyramid Architecture and Construction

Despite the obvious advantage of not having to spend time to build ramps in order to lift stone slabs, the method of not using ramps is not plausible. ... The use of zig-zag pyramids, ramps constructed on all four sides of the pyramid, would provide an efficient and stable means by which stone slabs could be lifted. ... The article and books that I found provide additional information about the research topic by delving into the physics of lifting the large limestone slabs as the pyramid grew. ...

  • Word Count: 777
  • Approx Pages: 3
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3. Egyptian Pyramids

This evidence shows they did in fact use human power in the construction of pyramids but it does not explain how a group of men were able to lift a two and a half ton piece of rock. It also does not explain how these rocks were carried from the quarry, or how it was lifted up the pyramid, as it became taller. If one was to build a pyramid today assuming the slabs were already cut and ready to put together the fastest and easiest way to move them would be a crane. In order to get an exact placement of the slab it would take the crane nearly one day to position itself and drop the block in pla...

  • Word Count: 1545
  • Approx Pages: 6
  • Grade Level: Undergraduate

4. Pyramids Of Egypt

This evidence shows they did in fact use human power in the construction of pyramids but it does not explain how a group of men were able to lift a two and a half ton piece of rock. It also does not explain how these rocks were carried from the quarry, or how it was lifted up the pyramid, as it became taller. If one was to build a pyramid today assuming the slabs were already cut and ready to put together the fastest and easiest way to move them would be a crane. In order to get an e...

  • Word Count: 3733
  • Approx Pages: 15
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5. First Car

This sort of vehicle was high, black polished, also slab sided, with a small covered balcony projecting from the front to hold both persons inside. ... The body itself was lifted off the ground and the design gave it a form of toughness. ...

  • Word Count: 422
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6. Tsunami

Along the ring's edges, giant slabs of the earth's crust, called tectonic plates, grind together. ... If an earthquake lifts or drops part of the ocean floor, the water above it moves strongly to trigger a tsunami. ...

  • Word Count: 607
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7. Urban Metropolis

But lift your gaze to the horizon; then you realize that those distant shoeboxes (Clay) are commuter destinations. ... A roll of curved horizontal glass off an office slab in a series of waves exactly repeated by a roll of water falling beneath it. ... "Descending into traffic that is bumper to bumper in both directions, one swirls through tangles of lawn and parking, punctuated by office slabs whose designers have taken the curious guarantee of never placing windows in anything other than horizontal reflective strips" (Sudjic). ...

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8. Fillipo Brunelleschi

Among the most innovative was a boat to carry marble slabs from the Carrara quarries to Florence via an upstream voyage on the Arno. ... For example, by using counterweights and wheels for lifting he made it possible for a single ox to raise a load so heavy that previously it would hardly have been possible for six pairs of oxen to move it." ...

  • Word Count: 986
  • Approx Pages: 4

9. Odysseus And Achilles

The ability to lift his father's spear that "No other Achaean fighter could heft [ and that] only Achilles had the skill to wield" exemplifies his strength above all men (171). ... When he and his crew reach the great Kyklops, Odysseus thinks ahead and realizes that if he kills the great monster, his men will "perish there [ ] for we could never move his ponderous doorway slab aside;" therefore he mindfully creates a plan before taking the beast's life (310). ...

  • Word Count: 1444
  • Approx Pages: 6
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