When burning, Yes.
A normal fire in a steel-frame building can soften the structure to the point of collapse.
Building laws / regulations require that all the structural steelwork is either covered in a protective coating (such as intumescent paint) or boxed in with fire-resistant plaster, so the fire can be extinguished before the building is weakened - or at least give people time to get out.
If that coating or plaster is damaged by impact or an explosion, the steel is exposed and the building can collapse relatively quickly.
(The common intumescent coatings just look like paint until exposed to fire, so the steelwork may appear to have no particular protection - but it always does).
Information:
http://www.steelconstruction.info/Fire_p...
See the images below - small buildings with steel-frame roofs after fires; you can see the amount of "sagging" and distortion on structures that have no particularly high loads.
These have burned long enough to destroy any protection, or they did not have any as the structure does not support occupied space.
http://www.champnews.com/Picture_Library...
http://thelincolnite.co.uk/wp-content/up...
Answer:
surveys
Explanation:
Micah would certainly use a form of quantitative data because his study sets to obtain numerical value of the single-parent households in his school district which can be counted and measured. Surveys can be used to obtain the discrete data he needs in the process.
This is a more objective method of data collection and Micah can have a broader look of a large portion of areas to be analyzed.
Answer:
Can you please tell me what story.
Jane Zhang The Ancient Egypt The ancient Egyptians enjoyed many natural barriers. To the west is the Sahara, the hottest desert in the world. To the east is the Eastern Desert. To the far south, the Nile's dangerous cataracts blocked their enemies. And in the north, the delta marshes offered no harbors for the invaders.
<span>The Egyptians were not completely closed to the outside world. The Mediterranean Sea and the Red Sea allowed them to trade with others. Geography The Nile River is about 4,160 miles in length and is the longest river in the world. </span>
<span>The ancient Egyptians settled along the Nile River and created the Nile River Valley.</span>
Answer:
Explanation:
has become fashionable in some circles to run down post-apartheid South Africa. This occurs not only in those sections of the media that believe African success is a contradiction in terms but also, more surprisingly, in quarters that strongly supported our transition to democracy and drive towards social justice. The Guardian's columns have not been exempt from criticism: Chris McGreal delivered some intemperate parting shots when he finished a 12-year stint as a southern Africa correspondent. We take such criticism seriously, but also find it inadequately based in fact and reality.
Take HIV/Aids. The latest survey by South Africa's human sciences research council confirms a UNAids report that shows falling levels of HIV infection among young South Africans. Prevention messages about condom use, abstinence and faithfulness are being taken to heart, especially by young people.
