Gin Poles

It is a simple type of pole made up of steel or timber which is held vertical by four guys 900 apart. It is used for straight hoisting in case of loading and unloading operations.

The hoisting can be either mechanically operated or hand operated. The mechanism can be attached to the mast or it can be set at some distance from it.

Gin pole is used in the erection of steel structures and transportation.


Cranes

Present day construction involves handling of heavy loads with a fast speed, reliability, safety and economy. For this purpose, cranes are used according to the requirement of the work. The following are the different types of cranes:

·        Stationary: Derric Crane

·        Mobile Crane: Overhead or gantry

·        Traveller

·        Tower crane

They may be electrically operated, diesel operated or may have diesel-electric drive.

The crane-shovel with its variety of attachments is the modern construction equipment. It is the most commonly used lifting and loading equipment in construction works.


Crane

Concrete Mixers

Concrete mixers are used for mixing the concrete ingredients to make a mix of specified consistency. The large volume of concrete is required on construction works. Besides, the quality of mix obtained from the mixers has to be uniform.
There are mainly two types of concrete mixers, viz 1) Drum Type 2) Pan Type


Drum Type Concrete Mixer


Concrete Vibrators

Vibrators are used for compaction of concrete after placement. There are four types of vibrators viz.

·        Internal vibrators

·        Surface vibrators

·        Form vibrators

·        Vibrating tables

Vibrators are driven either by petrol compressed air or by electricity. Petro-driven vibrators are handy and useful particularly where compressed air or electricity is not available.



Petro-driven Immersion Vibrator


Cable Ways and Belt Conveyors

A band or belt conveyor is one of the most well-known forms of conveying machinery when huge quantities of construction material like earth, sand, gravel, etc. conveyed over a long distance at a faster speed.

Advantage of Belt Conveyors

·        It is smooth in operation.

·        It can convey material uphill gradients.

·        It can transport material in large quantities.

·        It produces less amount of dust.

·        It is reversible.

Disadvantages

·        It is subjected to wear and tear.

·        Difficult to shift the whole unit without dismantling and damage.

·        Careful alignment is required for satisfactory results.


Cable Way

A cable way consists of two end supports, the track cable, the carriage, the traction rope and hoist rope. The supports are generally braced up towers which may be stationary or mobile running on a track so that these can move longitudinally to command length perpendicular to the direction of conveying.


Typical Arrangemnent in a Cable Way


It is used for transportation of concrete from one place to another, particularly over a restricted area and deep valleys, where construction of road is not feasible. It enables to hoist the load and at the same time, it makes possible to move it over a considerable distance.