Building a Bridge with Balsa Wood

[subhareads]

I need to make a bridge using Balsa Wood, but I can't decide whether to use the Howe or Pratt Truss.

Requirements
maximum mass of 25 grams
maximum test load will be 15kg
must allow a 5.0 (∼2”) cm cube to pass along the roadway without touching
the structure
must be an opening at the center of the roadway of at least 1 cm x 1 cm. This will
allow the loading block bolt to pass through the roadway.

Any thoughts?

 

[anvesh111]

try to draw in a sheet ,or make a design in autocad for best construction

 

[oswaler]

I would recommend conducting experiments and simulations to determine which truss design would be more suitable for this specific project. Both the Howe and Pratt truss have their own strengths and weaknesses, and it is important to consider factors such as the weight distribution, stability, and load-bearing capacity of the bridge. Additionally, it may be helpful to research and analyze the properties of Balsa Wood, such as its strength and flexibility, in order to make an informed decision. It would also be beneficial to consult with other experts in the field and gather their insights on the matter. Ultimately, the most important aspect is to carefully plan and test the design to ensure that it meets all of the given requirements and is able to effectively support the intended load.