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The Realities Of Demolition
The demolition industry is quite obviously concerned with the tearing down of buildings. Construction and demolition go hand in hand with each other, and there is a cyclical relationship between the two - with one being almost impossible without the other in developed areas.
We've all seen the large scale demolitions, where tall buildings are demolished with explosives and fall dramatically in neat layers. Or better yet we've all seen the implosions where the dust flows back into the collapsed structure in a bizarre but visually striking way. Now let's make it clear, these are specialised demolition contracts designed to take down truly colossal structures. The hired specialists will take extra special care in choosing the most appropriate form of demolition and carrying it out in a safe way so as to ensure an effective result. It's much less common than other forms of demolition, that affect the majority of people who are taking down small structures in their back garden or small companies specialising in tearing down on a small scale.
This aspect of demolition isn't exactly the most visually striking, but it's by far the most common. So, the reality of demolition is far less explosive. Once a structure is ready to be demolished, it is usually carried out by a large piece of vehicular machinery known as a hydraulic excavator. These machines have a number of uses such as digging trenches for the laying of foundations in construction, moving materials, forestry work, landscaping, the lifting of heavy equipment, mining and dredging rivers. They are sometimes known as diggers or JCB's, although this is a proprietary name. They work by means of a long articulated arm attached to a bucket, sometimes called a scoop, positioned on a rotating platform which sits on a base with tracks or wheels for manoeuvrability.
When used in the process of demolition work they are positioned close to areas on a building that are structurally integral. This is typically at the base of a structure where the load bearing walls are placed. They are then pulled or pushed by the excavator, controlled by an operative who is guided by a demolition project manager, to cause the building to collapse in the desired position. This position is dictated by the surrounding area, the direction of collapse may be determined by the necessity to protect the adjacent building. Safety and cleanup also come into play, so the areas the excavator pulls down may be decided by these sorts of considerations.
This mode of demolition has largely replaced the traditional wrecking ball method, as it is more controllable and therefore safer. Excavators can be designed for high reach so as to demolish taller buildings. There are various other factors that affect mode of demolition, such as budget. It may be more efficient to implode a larger building than spend a lot of time pulling it down with an excavator.
As you can see, the realities of demolition are far different from the caricatured versions we all see on television and in cartoons. Although they do happen from time to time, it's actually more common to experience the sort of demolition described here.
Jeffrey Nevil writes on a number of subjects including demolition plant.
Article submitted Saturday, January 14, 2012 & read 5 times.
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