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:
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Answer:
The most powerful group was the Spaniards, people born in Spain and sent across the Atlantic to rule the colony. Only Spaniards could hold high-level jobs in the colonial government. The second group, called creoles, were people of Spanish background but born in Mexico.
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Answer:
D. We are hardwired to actively look for partners similar to ourselves.
Explanation:
- The concept of homogamy is a marriage between the two individuals that are in some culturally important ways similar to each other
- And is form of an associative mating and the union may be based upon the socio-economic status and gender and ethnicity and religion and age also matters in some of the homo-gamy traditions.
