Online: http:/­/­www.­irbnet.­de…
Creator: T. K. Bandyopadhyay
Type: narrative text
Languge: en
Description: Environment and sustainable development are by now familiar terms since the Rio Earth Summit a decade ago. It suggests eliminating or at least reducing unsustainable patterns of production and consumption based on relevant demographic policies. Earlier, the benefits of designing buildings could be quantified in terms of energy savings only. Now the challenge to the industry is to create buildings that are suitable for 21st century requirements and beyond. It is felt that Life cycle assessment is the most dependable measure to ascertain reliability of any construction material. Relevant standards, such as ASTM (E917) and IS (13174), and standard methods of Life Cycle Cost (LCC) analysis consider the total cost including interest during construction (IDC) on average investment, differential rentals for early completion, maintenance and repair costs, social costs, energy costs and other related costs, and the end use value rather than the direct cost alone while comparing different options. A recent study (INSDAG 2003 and 2002; Bandyopadhyay 2000) of urban commercial buildings as well as residential buildings reveals that steel-concrete composite construction will have lower LCC values over reinforced cement concrete (RCC) options. It shows that lower construction cost alone may not necessarily offer the overall cost-time combined economic viability as well as lowest LCC, which provide the optimum solution to the owner, builder and society (or nation). Steel-concrete composite construction requires shorter construction time compared to the RCC option. Early completion of the work reduces interest burden on capital invested and also fetches early rental value. Further, for lesser dead weight, cost of the foundation as well as total construction cost is lower for the steel-concrete composite construction compared to the conventional RCC construction. Thus, lower initial cost (construction cost combined with IDC) leads to more profits for the steel intensive buildings corresponding to the sales price considered. Considering the construction time gain of steel intensive buildings, LCC reduces further compared to the competitive options, when all elements of cost including maintenance, interest during construction, rental value, is considered. It shows that for lower initial as well as maintenance cost, the profits of different steel intensive buildings are greater as compared to the RCC option corresponding to the sales price considered. Hence, adaptability, assured quality, durability, flexibility, high strength and pre-fabrication coupled with other advantages e.g. recycling, reuse, and waste reduction make steel a unique material for construction. Thus, steel ought to be considered the material of choice in all "Sustainable Construction", since it offers innovative design and construction solutions apart from satisfying the environmental bench marks.
Subject: life cycle cost (LCC)
steel-concrete composite
reinforced cement concrete (RCC)
Identifier: http://www.irbnet.de/daten/iconda/CIB10029.pdf
Source: Ariadne
Rights: free for personal and academic use but not for commercial purposes