Construction sites lifting

Construction site lifting equipment is subject to the above requirements and, because of the hostile environment in which they have to work, may require more frequent examinations and checks. 

It is important to be able to estimate vessel weights, since most cost estimating procedures start with the weight of the vessel. The vessel weight, both empty and full with water, may be necessary to adequately design a foundation or to assure that the vessel can be lifted or erected once it gets to the construction site. 

Simple pontoons arc also extensively used on marine construction sites as transport for temporary and permanent materials and as working platfonns for lifting and/or pile driving. Uniflotcs or equivalent can also be joined together to make platfonns of any size and shape to fit around or between construction works. 

Hazardous malfunction - if a piece of equipment was to fail in its function (that is, fail to do what it is supposed to do) and, as a result of this failure have the potential to cause harm, then this would be defined as a hazardous malfunction. Consider an example - if a materials lift on a construction site was to collapse when the supply to its motor failed, this would be a hazardous malfunction. All the regulations concerning work equipment state that it must be ... 

It may be necessary, or convenient, to connect together a number of components at one location to form a unit and then to move the unit to its final location. This may be at the construction site, for example when units are assembled at ground level and then lifted into position, or may involve transport over a longer distance, for example from the factory to the site. In all cases, steps should be taken to minimise unnecessary additional stresses, due to lifting and transport, by the use of temporary supports and braces, as detailed in Chapter 6. Where this is not possible, some additional testing on the assembly may be required. 

HSG 144 Safe use of vehicles on construction sites HSG 150 Health and safety in construction GS28 Safe erection of structures pt 3 Working places and access PM28 Working platforms on fork lift trucks BS 5973 Code of Practice for access and working scaffolds and special scaffold structures in steel... 

Heavy objects on construction sites are usually lifted by forklifts, hoists, platforms, cranes, and other t3rpes of materials-handling equipment. However, it s often necessary to load or vmload moderate to heavy objects by hand. When that is the case, knowing the proper ways to lift can save you a great deal of pain and misery from a sprained back. 

These Regulations apply to all equipment used for lifting on construction sites and include fixed, mobile and travelling cranes, hoists used for both goods and passengers and also the ropes, chains, slings, etc. that support the load being lifted. 

Many of the hazards and controls required for vehicle movements on construction sites have been covered earlier in this chapter. Common vehicles found on construction sites include site dumper trucks, fork lift trucks with telescopic handlers, all terrain and rough terrain vehicles, excavators and tipper lorries. On larger construction sites various types of earth moving equipment may also be used. 

The most common form of mobile handling equipment is the fork-lift truck. It comes from the group of vehicles, known as lift trucks, and can be used in factories, on construction sites and on farms. The term fork lift truck is normally applied to the counterbalanced lift truck, where the load on the forks is counterbalanced by the weight of the vehicle over the rear wheels. The reach truck is designed to operate in narrower aisles in warehouses and enables the load to be retracted within the wheelbase. The very narrow aisle (VNA) truck does not turn within the aisle to deposit or retrieve a load. It is often guided by guides or rails on the floor. Other forms of lift truck include the pallet truck and the pallet stacker truck, both of which may be pedestrian or rider controlled. 

On construction sites, fork lift trucks of various sizes (including rough-terrain, see Figure 13.10) are used to lift loads on to scaffolding working platforms. The loading bay for such working platforms must be constructed... 

Construction site hoists intended for lifting individuals or people and goods. 

In addition, they are usually constructed without isolation valves on the fuel supply lines. As a result the final connection in the pipework cannot be leak-tested. In practice, it is tested as far as possible at the manufacturer s works but often not leak-tested on-site. Reference 32 reviews the fuel leaks that have occurred, including a major explosion at a CCGT plant in England in 1996 due to the explosion of a leak of naphtha from a pipe joint. One man was seriously injured, and a 600-m chamber was lifted off its foundations. The reference also reviews the precautions that should be taken. They include. selecting a site where noise reduction is not required or can be achieved w ithout enclosure. If enclosure is essential, then a high ventilation rate is needed it is often designed to keep the turbine cool and is far too low to disperse gas leaks. Care must be taken to avoid stagnant pockets. 

A formal constructability VIP workshop conducted in the conceptual phase (FEL-I) should focus on the overall project construction strategies regarding site layout, construction and turnaround laydown areas, access to the site for large equipment and modules, modularization, sequencing of heavy lifts, limitations regarding procurement, limitations regarding fabrication and transport, area labor limitations, and coordination with any existing or nearby structures or facilities. 

After arriving at the plant site, construction workers set the equipment in place. This entails placing the equipment on concrete or steel stmctural supports, prepared in advanced. Because some equipment could weigh tons, a crane will lift the equipment onto supports. Then, consttuction workers secure the equipment in place. A factor will account for this cost. 

Alternatives considered were roll on/roll off barges and ships, lift on/lift off ships and conventional freighters. The method of landing preassemblies from the ships was investigated. A dedicated barge harbour that was to be constructed near the plant site was rejected early in favour... 

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