Lifting Equipment

To carry the load a hoist must be connected to the beam. A manually controlled hoist is the best idea as this will allow the load to be lifted without the use of electric motors. By using a mechanical winch this excludes the chance of electrical failure and hence the lifting apparatus will not work. Before the hoist can be connected a trolley should be attached to the I-Beam.

Trolley:

The trolley selected should be easy to connect and disconnect from the I-beam as this will decrease the time take to set up the lifting apparatus and also be safer for a single person to connect. With the ability to connect and disconnect at any point the trolley can then freely roll to each end.



The selected trolley has a universal connection underneath allowing any hoist to be connected. The Hoist has a lifting capacity of 1Tonne and a flange width from 65mm to 145mm. This is good for the specified design as the bottom width of the I-beam is 105mm and it is within the briefs lifting requirements. The model number is the HMT10 and the method of connection is shown in the engineering drawing below.



As you can see the trolley is solely connected to the lower section of the I-beam and once the load is lifted it is manually pushed from one end of the gantry to the other.
The cost of this trolley is £60

Hoist:

The method of lifting the load will be done by a ratchet lever hoist. The reason for this method of lifting apparatus is its lifting capabilities and its reliability. The chain lever hoist can be operated by one hand and once lifted it will hold at its location. Rope must be securely fastened around the load and then connected to the hook.



The height of lift from this hoist is 1.5m and its lifting capacity is 1000kg. The hoist itself is constructed from aluminium and only weighs 6.6kg which is within the area of portability.

The device is fully enclosed which promotes safety. The tensile lifting action is countered by an automatically acting load pressure brake. This is the mechanical device which prevents the load from falling once lifted off the ground.
The hooks which are connected to the trolley and load are forged steel which has the highest strength of any method of steel manufacture. This is because these points will be under extreme stresses and forging allows the stresses to be exerted linearly across its internal structure.

The name of the hoist is the Yale ALUMINIUM rachet lever hoist. The model which has a 1000kg lifting capability is priced at £215