This unique product is a collection of 786 high quality pictures of more than 100 balsa wood bridges. Several pictures from different angles were taken for most of the bridges, including the front, top, side, and upside down views. There are several sets of pictures in pdf format, and they include a wide variety of designs. There are many bridges that are quite strong and have attractive designs. A few other bridges used too much or too little balsa wood, have poor designs, or do not look look. Looking at his collection will give ideas about what bridge to design and assemble.
It is very important to understand well the requirements for the bridge that students need to construct, otherwise the bridge may be disqualified. For instance, in some bridge competitions the length of the bridge must be 40.5 cm, the maximum weight of the bridge is 16 grams, and no stick on the bridge can be shorter than 2.0 cm. In addition, the maximum height of the bridge is 25 cm, and the bridge must have an opening of maximum length 26 cm, and maximum height of 12 cm. One rule is that the sticks can not be placed together side by side.
In the construction of the balsa wood bridge, to make it stronger, it should have many of its vertical sticks supported on opposite sides by slanted sticks. In that way, when a force is exerted downward, they will prevent the bridge from collapsing sideways prematurely.
Another great product in TpT is the Balsa Wood Bridge Tutorial, which teaches students how to make the blueprints and assemble step-by-step the bridges they decided to construct. The TpT link of this product is https://www.teacherspayteachers.com/Product/Balsa-Wood-Bridge-Tutorial-7148451
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