Author Topic: STEEL BUILDING  (Read 2892 times)

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mrahevar

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STEEL BUILDING
« on: June 27, 2008, 04:42:24 PM »
STEEL IS NO DOUBT A BETTER CONSTRUCTIN MATERIAL BUT IT IS ONLY IN PRACTICE IN DEVELOPED COUNTRY.I WOULD LIKE THAT WE SHOULD HIGH LIGHTS THE BENIFITS AND NEGATIVES OF STEEL TO MAKE THE STEEL MORE CLEAR AS A CONSTRUCTION MATERIAL.

HOPE SOME EXPERT TO ADDRESS THIS TOPIC

MD

kerry19

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Re: STEEL BUILDING
« Reply #1 on: February 09, 2009, 01:32:36 PM »
Iron and steel are used widely in the construction of roads, railways, infrastructure, and buildings. Most large modern structures, such as stadiums and skyscrapers, bridges, and airports, are supported by a steel skeleton. Even those with a concrete structure will employ steel for reinforcing. In addition to widespread use in major appliances and cars (Despite growth in usage of aluminium, it is still the main material for car bodies.), steel is used in a variety of other construction-related applications, such as bolts, nails, and screws. Other common applications include shipbuilding, pipeline transport, mining, offshore construction, pipeline transport, aerospace, white goods (e.g. washing machines), heavy equipment (e.g. bulldozers), office furniture, steel wool, tools, and armour in the form of personal vests or vehicle armour (better known as rolled homogeneous armour in this role).

ak74

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Re: STEEL BUILDING
« Reply #2 on: February 11, 2009, 07:19:16 AM »
On the positive side steel is a neater construction material as opposed to concrete as one does not need formwork etc, which becomes redundant after a couple of uses. the other thing is that there is no curing time required for steel unlike concrete. so you can erect a column-beam structure and as soon it is ready you could start building on top of it. concrete needs at least 28 days to cure before you can put load on it even though the first setting happens in 30 minutes. Lack of curing times makes use of steel a very good option in fast track projects. The other aspect of steel is that it is lighter than concrete if you compare sections of steel and concrete both desgined to carry same loads. This makes use of steel easy in high rise buildings. One of the best part about steel is that it is 100% recyclable, which is very important in today's context - this means there are no land fill issues to deal with and it can offset some demolition cost.  One thing though I am not sure is what is the carbon foot print for a ton of steel versus a ton of concrete. One of the key reasons why steel has been choice of construction material in the develeoped nations is because of being less labor intensive - you need less labor to produce and erect steel as opposed to concrete which as I said above needs labor to either batch mix it in a plant or make it on site, put the formwork, pour and then later remove the formwork.

on the drawbacks side - you have to sparayfireprrof steel for construction, which is an added expence. In the last couple of years with Steel prices going thru the roof it has lost its competitive edge, and also beacuse of long procurement times ( as raw steel is competing with other industries - cars, etc) it has added long waiting times.

Hope it helped. If anyone in the forum has other thoughts to add or have information regarding carbon foot prints of steel vs concrete, please share it with others. It will be very intersting to know.

 

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