The thing is, for so many of us; often we either take for granted, or simply donít take the time to consider, the enormous accomplishment and social impact the many structures of the world present. Perhaps if we were to consider the gigantuate amounts of material, enormous costs, time, manpower and ingenuity, let lone the risks or barriers to over come; perhaps then we might begin to consider how big-a-deal, how significant, how cool, these structures really are.
To view previous CBHA Structure building champs, click: http://www.cbhatech.ednet.ns.ca/teched9/
Lets test ourselves by guessing the
answers to the following questions: (Write them down on a piece of paper)
Activity: Test Your Knowledge
In 1776, the completion of an Underground Canal joining Lancashire County and
Manchester, England for the purpose of transporting coal actually led to
lowering the price of coal by half. How long do you think this over 250 year
old, hand dug tunnel is?
b.) The Hoover (Hydroelectric power) Dam built in 1936, in Arizona and Nevada, USA has enough cement in it to build a four-foot-wide sidewalk that, if started at the Congo ( on the equator) at the east side of continent of Africa, and went westward towards Kenya ; Where would you end up?
c.) How many tons would you say the Toronto Sky Dome retractable roof weighs?
d.) How many windows do think are in the 88 story Petronas (twin)Towers Located in Kuala Lumpur, Malaysia which were completed in 1998 at a cost of $1.6 billion.
The Akashi Kaikyo Suspension Bridge completed in 1988, joining Kobe and
Awaji-shima, Japan, at a cost of $4.3 billion, by the way, has cables that, if
put end to end, would go how many kilometers?
Did you imagine
that a 250 year old underground canal was any where near 274,560 feet (52
miles) in length? Can you believe that the cement in the Hoover dam would build
such a sidewalk that would rape around the earth's equator and bring you back to
the Congo? Did you really think that the Sky Dome's roof weighs more than 11,000
tons, and that the roof panels slide at a whopping rate of 71 feet per minute?
How would you like to clean the Petronas Tower's 32,000 windows. It takes window
washers an entire month to wash each tower just once! The length of the
cables used in the Akashi Kaikyo Bridge
totals 300,000 kilometers. That's enough to circle the earth 7.5 times! Now that
has to be impressive. for more impressive structures, click on the following
link. Check out the fast facts at the bottom of each link.
Exercise A: Let's try out the following scavenger hunt and hopefully gain a little more awareness and appreciation for structures in general. The answers can be found by clicking on the appropriate links below ( Tunnels Dams Domes Skyscrapers ), and searching through the related information.
Before you begin this exercise, you are to take a page, divide it down the middle into two columns . Then go through the questions below and in the left column; answer questions to the best of your ability. Once you "guess" them all, use the links below to find the correct answers, and record the correct answers in the right column. Finally, compare the results. You may be surprised at what you find.
Tunnels Dams Domes Skyscrapers
So, let's begin looking at structures from the ground up, or even below. In
getting back to nature, we, like many rodents and other animals, dig tunnels and
build dams to protect our habitat and food source.
Manmade dams may have more varied purposes for being built compared to the famous beaver, but the forces working on them are similar, as are some of the negative results of a new dam.
Man made dams are controversial because of the costs verses the benefits of any Dam. The costs are not always measured in dollars. Nova Scotia protects fertile land in the Canning area with dams called dykes. Holland's dykes keep over 1/2 the country protected from serious flooding. In Sept./05, New Orleans experienced the costs when the levees (a kind of dam), meant to protect the city, were not sufficient to hold back Mother Nature.
are structures that are somewhat unique in comparison to above ground structures
largely due to the barriers and forces they have to deal with. People also
tunnel under ground like many animals do for various reasons. In our case it may
be to mine ores and minerals, or simply to get from one place to another.
1) List 4 major advantages as well as 4 disadvantages of manmade dams.
2) Dams don't last forever. Hot and cold weather makes them crack. Water erodes their foundations. They create environmental problems. Eventually, there becomes a time when difficult decisions have to be made; every dam must be repaired, removed, or replaced. On the surface, this may seem to be a simple decision to make, but if you investigate the 4 dam scenarios below, you will see that things always cut and dry. Click on the following link and solve the various dam problems, but make sure you check out all the possible answers: http://www.pbs.org/wgbh/buildingbig/dam/challenge/index.html
3) From what you have seen concerning tunnels, why do you think people build tunnels?
4) Digging tunnels
is hot, dirty, and a risky business. Since ancient times, tunnel diggers have
used different types of tools and techniques to carve through mountains and bore
through oozing mud. We have seen the 3 types of tunnels and the 3 stages it
takes to produce a tunnel. Now lets try solving the three tunnel challenges on
NOTE: Check out the different options for each condition, including the unlikely choices to learn some valuable and interesting information.
This is a good time to watch the Euro Tunnel video.
Most man made structures: bridges, towers,
buildings such as
, are not only classified as structures, but also as works of art. They can be
very complex and are all built to deal with great forces. . For the purpose of
this program, we are going to concentrate on bridges as a means to better our
engineering skills and our appreciation for the work and know how involved in
producing the structures that we, perhaps, take for granted. Before we get into
bridges, however, let's take a last quick look at
Many buildings , especially skyscrapers are built in earthquake zones, and are designed to handle these violent tremors, as a result.
or this series of
, (a segmented
version, which has some over lap). Then answer the following questions.
a) How did skyscrapers get started? How do they differ from today?
b) What are 2
benefits to skyscrapers, and 6 major problems (3 structural & 3social) that
This is a summarized review of the above subject.
2) It's your job to
investigate three damaged buildings and figure out how to fix them ... fast!
Click on the following link and check out all the options for each one.
The Skyscraper Challenge
3) Follow the link below to solve the 3 different dome issues that will present themselves.
Complete the Following cross word puzzle based on the 4 challenges in the exercises above.
Complete the puzzle.
Structure Glossary: http://www.pbs.org/wgbh/buildingbig/glossary.html#reincon