A Brief Overview on Steel Structure Construction
Through Design & Construct, Materials Handling and Structural Steel capabilities, contractors in the Pilbara are able to supply capital works and ongoing maintenance services to mining companies. Being strategically located these contractors are able to service key mining projects in the Pilbara. Their mining infrastructure capabilities include office/warehouses, workshops, commodity storage, load and unload facilities, walkways and structural steel.
Structural steel provides the framework around which the rest of the construction industry is built. Structural steel is used to create the skeleton of a building – the frame onto which walls and roofing is placed, and around which the building or structure takes shape.
Steel Structure Construction industry utilises a range of steel materials, including rails, beams and rods, and different types of metal bars including merchant, cold finished and chrome plated bars. In addition to these products, reinforcing materials such as wire, tube, pipes, fittings and valves may also be incorporated into building design and construction.
The Following Advantages in General May be Credited to Steel Structure Construction:
- High strength/weight ratio. Steel has a high strength/weight ratio. Thus, the dead weight of steel structures is relatively small. This property makes steel a very attractive structural material for
- High-rise buildings
- Long-span bridges
- Structures located on soft ground
- Structures located in highly seismic areas where forces acting on the structure due to an earthquake are in general proportional to the weight of the structure
- Ductility. As discussed in the previous section, steel can undergo large plastic deformation before failure, thus providing a large reserve strength. This property is referred to as ductility. Properly designed steel structures can have high ductility, which is an important characteristic for resisting shock loading such as blasts or earthquakes. A ductile structure has energy-absorbing capacity and will not incur sudden failure. It usually shows large visible deflections before failure or collapse.
- Predictable material properties. Properties of steel can be predicted with a high degree of certainty. Steel in fact shows elastic behaviour up to a relatively high and usually well-defined stress level. In contrast to reinforced concrete, steel properties do not change considerably with time.
- Speed of erection. Steel structures can be erected quite rapidly. This normally results in quicker economic payoff.
- Quality of construction. Steel structures can be built with high-quality workmanship and narrow tolerances.
- Ease of repair. Steel structures in general can be repaired quickly and easily.
- Adaptation of prefabrication. Steel is highly suitable for prefabrication and mass production.
- Repetitive use. Steel can be reused after a structure is disassembled.
- Expanding existing structures. Steel buildings can be easily expanded by adding new bays or wings. Steel bridges may be widened.
- Fatigue strength. Steel structures have relatively good fatigue strength.
Some Disadvantages of Steel in Certain Cases, Could be :
- General cost. Steel structures may be more costly than other types of structures.
- Fireproofing. The strength of steel is reduced substantially when heated at temperatures commonly observed in building fires.
- Maintenance. Steel structures exposed to air and water, such as bridges, are susceptible to corrosion and should be painted regularly. Application of weathering and corrosion-resistant steels may eliminate this problem.