These test results reveal that the bridge successfully passes the load test in the virtual simulation while also fitting all of the requirements set by the guidelines for the activity. All of the bridge's members have a compression force/strength ratio of 0.40 (+/- 0.01) and a tension force/strength ratio of 0.45 (+/- 0.01). Because 4/29 members are hollow, this completes the requirement that about 15% of the members are hollow tubes. To complete the goal of the lowest possible price, sizing down some of the members with the least stress forces and making some members hollow allowed us to get the price of the bridge down to $296,851.05. Overall, this virtual bridge was successful because it was able to support a live load and the load test results revealed that the bridge fit all of the requirements for the activity.

These are the calculations of the net force on each joint of the bridge. In order to calculate this, I needed to know the compression and tension forces on each member and also the angles of each joint. The bridge in the simulation includes 45-45-90 triangles, so the calculations included the sine and cosine of 45 degrees, which is approximately 0.7071. When doing the calculations, the assignment required that the forces for each joint had to be separately calculated using the X and Y axes. When the forces were calculated for the X axis, the cosine of 45 degrees was included in the calculation. When the forces were calculated for the Y axis, the sine of 45 degrees was included in the calculation. To calculate each force on the joint, I added/subtracted the compression and tension forces on each member included in the joint and multiplied some of the forces with 0.7071 for the members that were diagonal and not directly horizontal or vertical. I did this twice for each joint depending on which members were part of the X axis calculations and which ones were part of the Y axis calculations. Once I had the force of both the X and Y axis, I added those together to find the net force on the joint. I did this 16 times overall because the bridge had 16 joints.