Hoisting ...05.12.10.wo.vid — Presentation Transcript2. HOISTINGIn Architectural terms Hoisting means Lifting loads ,Light or Heavy, with the help ofmachines or any other mechanical means.Generally Known as Vertical Traction.3. The industrial market consists of huge varieties of hoisting equipment likeCrane and itscomponents, Elevators, Lift cables, Monorails, Jacks, Hoisting buckets, Lever operated hoist, Pulleys,Wire rope hoist, Stacker, Wheels, Work levers, Tail gates and many other miscellaneous hoistingproducts suiting different industrial requirements.•Lift CablesInternal & External Mono RailsCraneElevatorsWire – Rope HoistsJacksHoisting BucketsLever Operated HoistsWork LeversStackersWheelsTail GatesPulleys•They are mostly used to pull, lift, hoist, haul or raise equipment to different places.They are available in different types, sizes, capacities, models and functions depending uponindividuals needs.• They are very easy to use and are cost effective too. Hoisting equipment are used in constructionindustries, transport industry, chemical industries, mechanical industry, sopping malls, buildings,agricultural industry, and in almost all the industrial sectors thus fulfilling different hoistingrequirements of buyers.
•Hoisting is the operation of lifting the load. Hence equipments used for hoisting purpose lift theload from the place, hold it in suspension during transfer from one location to the other and finallyplace it on the desired location.It should be strong enough to negotiate the load prescribed and should consume minimum timepossible in the operation and it must be quite safe while handling.•Types of Hoisting Equipments:PULLEYPulley and sheave are used for lifting rough surfaced and heavy objects. Both chains and wire ropesare used for this purpose.CHAIN HOISTIt is used for lifting loads upto 50 tonnes. The system consists of hand chain n load chain. The pullapplied through the hand chain is transmitted to the load chain with a multiplication factor of over20.JACKIT is based on the principle of inclined plane. The smallest jack may have capacities for 5 tonne,whilethe bigger variety may be of 100 tonnes capacity.WINCHIt is a combination of gears (spur and pinion),clutches and brakes. The operation is controlledthrough a series of levers.CRANEIt is most widely used equipment as an independent unit. Lifting capacity veries from 0.5 tonnes to500 tonnes.•CHAIN HOISTSPULLEY•Types of Jacks:MECHANICALIn this system, load is mounted on the platform which is attached with spirally threaded spindle. Theplatform is rotated and load is lifted.
HYDRAULICIn this system, pressure is exerted by a liquid on the surface.MECHANICAL JACKHYDRAULIC JACK•WINCH•CRANES•The principal components of hoisting machines are:sheaves and pulleys, for the hoisting mechanisms; winches and hoists, for the power units; andderricks and cranes, for the structural elements.Sheaves and pulleys or blocks are a means of applying power through a rope, wire, cable, or chain.Sheaves are wheels with a grooved periphery that change the direction or the point of application ofa force transmitted by means of a rope or cable.•Pulleys are made up of one or more sheaves mounted in a frame, usually with an attaching swivelhook, eye, or similar device at one or both ends. Pulley systems are a combination of blocks.winches are designed for stationary service, while hoists are mounted so that they can be movedabout, for example, on wheel trolleys in connection with overhead crane operations. A winch isbasically a drum or cylinder around which cordage is coiled for hoisting or hauling. The drum may beoperated either manually or by power, using a worm gear and worm wheel, or a spur geararrangement. A ratchet and pawl prevent the load from slipping; large winches are equipped withbrakes, usually of the external band type.•CRANES•A crane is a lifting machine, generally equipped with a winder (also called a wire rope drum), wireropes or chains and sheaves, that can be used both to lift and lower materials and to move themhorizontally. It uses one or more simple machines to create mechanical advantage and thus moveloads beyond the normal capability of a human. Cranes are commonly employed in the transportindustry for the loading and unloading of freight, in the construction industry for the movement ofmaterials and in the manufacturing industry for the assembling of heavy equipment.
•Types of Cranes:DERRICK CRANEIt consists of a mast supported by a number of members.MOBILE CRANEIt is a crane mounted on pneumatic type truck on crawler tractor chasis.WHIRLER CRANEIt combines the advantage of long boom of derrick and mobility of the mobile crane.TOWER CRANEIt is used for erecting very tall industrial and residential buildings.HYDRAULIC CRANEIt is very popular in the present day because length of the boom can be changed during the workingof the crane itself.GANTRY / OVERHEAD CRANEIt is a must in factories and workshops. Two main girders are fixed at the end of the bridge. The chiefadvantage lies in the three way movement of the load.•A derrick is distinguished by a mast in the form of a slanting boom pivoted at its lower end andcarrying load-supporting tackle at its outer end. In contrast, jib cranes always have horizontalbooms. Derricks are standard equipment on construction jobs; they are also used on freighters forloading and unloading cargo, and on barges for dredging operations. Hoisting machines with a bridgelike structure spanning the area over which they operate are overhead-traveling or gantry cranes.•Various types of cranes are:Mobile CranesThe most basic type of crane consists of a steel truss or telescopic boom mounted on a mobileplatform, which could be a rail, wheeled, or even on a cat truck. The boom is hinged at the bottomand can be either raised or lowered by cables or hydraulic cylinders.Telescopic CraneMobile Crane
Telescopic CraneThis type of crane offers a boom that consists of a number of tubes fitted one insideof the other. A hydraulic mechanism extends or retracts the tubes to increase or decrease the lengthof the boom.•Tower CraneThe tower crane is a modern form of a balance crane. When fixed to the ground,tower cranes will often give the best combination of height and lifting capacity and are also usedwhen constructing tall buildingsTower CraneTruck Mounted CraneTruck Mounted CraneCranes mounted on a rubber tire truck will provide great mobility. Outriggersthat extend vertically or horizontally are used to level and stabilize the crane during hoisting.•Rough Terrain CraneA crane that is mounted on an undercarriage with four rubber tires, designedfor operations off road. The outriggers extend vertically and horizontally to level and stabilize thecrane when hoisting. These types of cranes are single engine machines where the same engine isused for powering the undercarriage as it is for powering the crane. In these types of cranes, theengine is normally mounted in the undercarriage rather thanin the upper portion.Rough Terrain CraneLoader CraneLoader CraneA loader crane is a hydraulically powered articulated arm fitted to a trailer, used to loadequipment onto a trailer. The numerous sections can be folded into a small space when the craneisn’t in use.•Overhead CraneAlso referred to as a suspended crane, this type is normally used in a factory, withsome of them being able to lift very heavy loads. The hoist is set on a trolley which will move in onedirection along one or two beams, which move at angles to that direction along elevated or groundlevel tracks, often mounted along the side of an assembly area.•A concrete pump is a tool used for transferring liquid concrete by pumping. There are two types ofconcrete pumps.The first type of concrete pump is attached to a truck. It is known as a trailer-mounted boomconcrete pump because it uses a remote-controlled articulating robotic arm (called a boom) to placeconcrete with pinpoint accuracy. Boom pumps are used on most of the larger construction projectsas they are capable of pumping at very high volumes and because of the labour saving nature of theplacing boom. They are a revolutionary alternative to truck-mounted concrete pumps.
•The second main type of concrete pump is either mounted on a truck or placed on a trailer, and it iscommonly referred to as a line pump or trailer-mounted concrete pump. This pump requires steel orrubber concrete placing hoses to be manually attached to the outlet of the machine. Those hosesare linked together and lead to wherever the concrete needs to be placed. Line pumps normallypump concrete at lower volumes than boom pumps and are used for smaller volume concreteplacing applications such as swimming pools, sidewalks, and single family home concrete slabs andmost ground slabs.•THANK YOU