can you get more stories with steel construction or reinf. concrete construction for a given building height?
86278
It is possible to achieve small storey heights with either material to fit in as many floors as a designer wishes to a given height. Skyscrapers are built from steel as the dead weight of the concrete becomes too much over a certain height, rather than because smaller storey heights can be achieved. Thinner floors are possible with steel but floor thicknesses are governed more by services and ceiling finishes so this is irrelevant also.
306003
By bar I assume you mean reinforcing steel. Each size has a bend diameter. Go to the ASTM and pull up the chart. Next a hydraulic press is best to provide the action.
959992
depends on which city you are building that that model for ,as different cities have different rules regarding the building heights,but if its just for fun then divide the total height of your model with the number of floors you want ,to get the exact height of each floor.
923963
Traffic timing for this much weight is also considerable. A\n   building code shows that you might need 15 or more for\n   this area so titanium is probably out.  The core value of\n   bronzed steel is ok for the average busy building.  Size again\n   must be measurables ranging from 2.7 to 3.7 made in 20 foot\n   can be made in 35 precise.
654058
You may be able to get some taller shoes.
608538
http://archrecord.construction.com/news/wtc/#
353442
you want a proposal for a contruction bid. i have one, but it depends on the jobs, roofing, and outside work i have available.
431522
http://floorforwindows.generalentropy.com/Index.aspx
348207
Being a high rise construction superintendent, this is my experience:\n\n90% of all building heights are decided upon by the Owner and Architect due to business reasons. They decided to do 80 floors or 35 floors because the building will then meet their business model or usage requirements.\n\n5% of all building heights are decided due to local code. The government may own all air space over 500 ft., which means that a building may only go up 40 floors or so before code or local laws prohibit any additional floors.\n\nThe last 5% is due to local environments, such as surrounding infrastructure, geologic conditions, and whatnot. The fact is that we currently have the technology to build in almost any type of environment, regardless of the conditions. The only factor is money and time. Some owners choose to not build high because the cost factor is so prohibitive.
1058235
Check out steel in wikipedia
39127
1) The towers are built.\n\n2) The main suspension cables are draped across the towers.\n\n3) Temporary work platforms are hung from the main suspension cables so that construction workers can work.\n\n4) The main deck is built from the work platforms.
959728
Hi. As with most things it depends on the cost of manufacture. : http://www.steelonthenet.com/commodity_prices.html
809111
The Civil Engineering Portal - News - WTC \nEarly tests on steel beams from the World Trade Center \nThis site may be helpful.
849810
Here's the start of the answer and here is the link to the rest.\nA skyscraper is a very tall, continuously habitable building. Although there is no official definition, a minimum height of approximately 150 meters or 492.12 feet is often used as a criterion for a building to qualify as a skyscraper. Other criteria like shape and appearance may also affect whether or not a building is considered a skyscraper. The city of Chicago is credited as being the birth place of the skyscraper.\n\n\nhttp://en.wikipedia.org/wiki/Skyscraper
1043017
Check with your city offices, like the building code dept.  Hope this helps!
759987
Do what they do at concrete batching plants. Get out your bucket wheelbarrow and shovel.\nTrial and error on small batches as the properties of the materials can vary from place to place. Strength also requires greater input of cement and hence more cost.\nSuggest you go to the local concrete batching plant and ask for an indicative mix for 20, 25, 32MPa strength concrete.\nGood luck.
250753
I agree with you about the twin towers falling. My husband is an iron worker and has helped build a lot of "tall" buildings. He even said structural steel does not "melt" all the way to the bottom floor, like it supposedly did. He believes the buildings were "wired" from the bottom up. The fuel did not leak out all the way to the bottom. The pictures on tv of the twin towers falling reminded me of the pictures they show when a company is purposely demolishing a building.