how to build a straw bridge?
354429
This site should help\n\nhttp://www.technologystudent.com/struct1/model1.htm
88330
You have to start with the Jolly Roger - scull and cross bones.  Sails could be screwers and light cardboard curved with centre holes top and bottom, nicely decorated, two triangular ones at the front.  The hull could be a Plastic coke bottle cut lengthways.  Glue something heavy to the bottom and then a layer of foam for the screwers to stick into.  Fashion  cardboard to fit as a deck, make holes for the screwers.  Find some netting (stocking material or the stuff they use in fruit punnets.  Brown wool for rigging and put it all together and then caste off me hearties.
228519
A civil engineer can give you a better answer to this question than I, a Mechanical Engineer, but basically it comes down to what kind of bridge can be built based on its location.\n\nFor example, you're going to build a different kind of bridge over a river than you will over the San Fransisco Bay, simply because their size, depth, and needs are different.  In addition, the builders need to take the local weather patterns into account when building the bridge, because areas of high wind velocity are not going to want bridges with particular characteristics (a popular video to show in Engineering classes is the destruction of the Tacoma Narrows bridge in 1940 caused by harmonic oscillation arising from vibrations caused by high wind speed).  Location simply determines function, which then determines load.\n\nThe question then becomes tantamount to how do different bridge types support loads differently, which becomes a basic engineering question: the advantages of a suspension bridge over a truss or rigid frame bridge, etc., and the related difficulties of building each in particular areas.\n\nAreas of high silt or soft mud aren't going to want bridges that require alot of pilings, because it invites disaster - it provides more possible points of failure.  Instead, you would want a bridge with one or two heavy pilings that are capable of holding a huge load, like your typical suspension bridge.  With a suspension bridge, a snapped cable is not fatal to the function of the bridge, because the supportable load changes almost imperceptably.\n\n(I leave as an exercise to the reader to take a typical bridge span of 1000 feet, calculate the integral of the Moment over the length of the bridge [to give you the sheer force], and divide that by the number of cables - the load each cable holds is very small).\n\nThe attached link, while intended to be an educational game, gives you a basic idea of what I'm talking about.
441196
Build a mini trebuchet!  Build a mini trebuchet!\nGive egg LOTS and LOTS of padding!
394220
Build a bridge and get over it
923198
Hi. Try this second stage link : http://www.apogeerockets.com/education/how_to_multi-stage.asp
416914
Try to make it at 3 feet.  It will probably be easier.  I'd probably use balsa wood.
969909
Triangular truss bridge.
909914
You're best off using fishing wire rather than string but you won't need a frame. Make sure the balloons are evenly spaced and tether them well at both ends.
983509
When I was in 8th grade, we had a similar project, but we were only allowed to use straws and tape. Out of about 60 kids, only 2 didn't break. Mine was one of them.\n\nIt's hard to describe my design, but I will give you a few tips. \n\nThe most common reason that the other designs failed was because the egg fell out of the device. For a holder, I took about 10 straws in a bundle and taped the ends together. The egg went in the middle of this bundle. Whatever you do, make sure the egg will not fall out of the holder when it is shook or turned upside down.\n\nThe rest of the design was a bunch of straws folded into a triangle shape taped to the holder. Triangles are one of the strongest basic structures. \n\nHowever, since you are allowed to make parachutes, I would almost certainly integrate that into the design if I had to do it again.\n\nAlso, test your design at home before bringing it to class. This will allow you to fix anything that doesn't work like you expect.
263688
Get some metal and weld it all together, some wheels, some tires, a couple pieces of rubber for handle bars and pedals, a few feet of chain, and a wicker basket for the front and you're set. =) Oh and a cushion for a seat...don't want to forget the seat. Ouch... =)
622351
to get the foundations over water, there are several ways to get the foundation for the bridge set up over the water.  one way is to float out a platform that is not unlike an oil derrick.  from there 'piles'(columns made out of concrete or steel)are driven down into the ocean floor and a foundation is rested and secured and built on it until you get to the top.  \n\nthe other way is (in shallower water) to build a 'coffer dam'  this is a temporary structure that you would build around the place that you want the foudmnation for the bridge in the water.  you put the dam around the area, pump out the water, and then build a foundation as you normally would, or even place piles like the example from above.
808862
Probably not, but it will require engineering.  Without knowing more about what you are doing, it is difficult to answer.  \n\nAn engineer will have to specify how to build it.  It also depends on the loading (weight) you will be putting on it and the percentage of it that is live load or dead load.  This person will also be able to specify materials, sizes, etc. to achieve this.\n\nWhy did you put this in the geography section?  Try asking it again in engieering and it might be seen by more people that have expertise.
181600
the needed papers/license to build something like that.\n\nThe construction should be checked also before building (strong enough etc)
560891
paper made from straw
570010
Hi there,\n\nHere are some great websites that explain the entire process:\n\nhttp://www.rcskim.com/makeaboard/How%20to%20build%20a%20skimboard.html\n\nhttp://www.skimonline.com/equipment/board_building.htm\n\nhttp://www.surfing-waves.com/howto/make_skimboard.htm
952055
use a real tree\nbut make sure leaves must not be withered\nan wrap with ligth bulbs..\nand use cotton wools as snow