Balsa Wood Bridge Designs For Efficiency

This is the most efficient balsa bridge design.

Balsa wood bridge designs for efficiency.

This is the question i get asked the most. Begingroup i ve built a few balsa wood bridges for school projects and have only one piece of advice to add to josh s. Many high school and college science and engineering classes will. Requiring builders to achieve at minimum set bridge span.

The span and height of this bridge exceeds the minimum requirement specified. This is a fun intriguing project that will entertain an individual for hours. Moreover by increasing the cross sectional area of each member in the truss the weight of the structure also increased. Endgroup taylorr137 feb 27 13 at 2 14.

It s strong and dries quickly so you will save a lot of time possibly enough time to build a test bridge and then improve the design. The balsa wood used in this project were stiffer than the assumed elastic modulus and therefore a more efficient design could have been used. The height of the bridge would depend on. This instruction set will teach you how to design and construct your own bridge made out of balsa wood.

The balsa bridge s maximum load mass was 13kg and the rising starr bridge s maximum load mass was 15kg. In general you want to look at the areas of highest stresses both high tensile and high compressive stresses. Bridge design and how bridge structures generally were based on triangle shapes as the strongest structural element square openings lead to structural failure. If there was a 10 span for the balsa wood bridges then the bridge would need to be more than the 10 11 or 12 would be a start.

Advanced bridges are usually focused on designs based on arched cantilever and bowstring bridges. Before we can begin to look for an answer i need to know more specifically what you are looking for. 121109 219 95 kg 1st place strongest all time. A great many rr bridges were steel truss designs.

Thus 13 0 35 350 0 0081 balsa bridge relative efficiency score 13 0 45 350 0 0081 15 0 35 350 0 011 rising starr bridge relative efficiency score 15 0 45 350 0 011 which is. The balsa bridge s mass 0 0081kg and the rising starr bridge s mass was 11g. Further class periods were used to transfer their successful designs to 2 d or 3 d cad models to create accurate paper plans for building the balsa wood models. Virtual prototyping and how finite element analysis can.

What is the strongest bridge design. Final balsa bridge test for ucf structural analysis weighed in at 156 lbs 0071. Some of the most common competition requirements are. Most common balsa wood truss bridge designs that are used in competitions are of course warren pratt and howe.