The Student Steel Bridge Capstone (SSBC) project is where students are tasked to build a scale model bridge at 21' long for the Intermountain Southwest Symposium (ISWS). The ISWS competition hosted by the American Society of Civil Engineers (ASCE), with the competition created and judged by the American Institute of Steel Construction. The project will require a scale model bridge that will undergo a speed building competition along with a vertical and lateral load test completed at the ISWS April 11th-13th, 2024. Additionally, students are tasked to develop a proposal and report regarding design process for the scale modeled bridge.
Project Location
The project is based on a hypothetical 1.25 mile bridge that will be built in Ruston, Louisiana. The scale model will be constructed with considerations to the project location and environment.
Project Constraints
The constraints of this project has been identified in the American Institute of Steel Construction rule book for the Intermountain Southwest Symposium hosted by the American Society of Civil Engineers. Additional constraints are considered under the NAU ABET Capstone requirements for completing the project.
This project has been distributed into nine tasks in order to effectively implement and create a bridge for the Intermountain Southwest Symposium and for the Northern Arizona University Civil Engineering Senior Capstone.
The projects' first task includes research into the AISC competition details, different available materials, connections, and truss designs for the project.
Task 2: Preliminary Analysis and Design
The project will consider all different design elements and develop a decision matrix to analyze different options to optimize categories of stiffness, weight, constructability, and aesthetics. This task will evaluate all available materials, development of alternative connection design, and develop a final decision matrix considering all structural configurations for the bridge.
Task 3: Final Analysis and Design
The purpose of this task is to design the final bridge design determined in Task 2 and undergo 3D Modeling and analysis. This task will determine the bridge's strength under AISC-13 limits for code, serviceability analysis to determine if deflections will remain under AISC rules, and that all connections increase the stability and strength of the bridge.
The purpose of this task is to generate shop drawings from the finalized 3D model. Fabricators will be contacted to begin coordination between the design team to finalize final shop drawing products. An element of this step is to involve student mentees to understand the shop drawings and how to construct the bridge.
Prior to competition, the project team will conduct initial assembly to confirm all elements of the bridge have been fabricated accurately and adjust the design if problems are identified. After all modifications have been made, the team will conduct repeated assembly to become efficient in the construction of the bridge.
Task 6: Competition
The team will be responsible for transportation and construction of the bridge for the ISWS competition hosted by the American Society of Civil Engineers at the host school University of Utah. The team will then construct the bridge and participate in the vertical and lateral load testing determined at the event. All members include mentees will be involved with construction. The team will also be responsible for presentations at the event along with the speed and load competition.
Task 7: Project Deliverables
The team will be responsible for NAU Capstone deliverable including the 30%, 60%, 90%, and Final Report deliverables. These will be accompanied by the final website and presentation. All final documents can be found in the link below.
To manage the project efficiently, the project team has identified schedule, resource, and meeting management. The project will follow schedule as determined below and manage resources to confirm all costs are maintained. Meetings will be conducted to ensure all tasks are completed and the project follows all requirements with the technical advisor, grading instructor, client, and internal team meetings. .
Task 9: Impact Analysis
This project will consider all social, environmental, and economical impacts the project causes. The project will consider social and environmental impacts based on the fictional location of Lincoln Parish Park (Ruston, Louisiana) provided in the AISC rules . Economical impacts will be evaluated by ensuring all the bridge is designed and constructed with limited waste.
Staffing
Our staff for this project includes a Senior Engineer (SENG), an Engineer (ENG), a Technician (TECH), and a Drafter (DRFT). Staff will complete all elements of the project including all task and management for the project.
Senior Engineer
The Senior Engineer for this project will be responsible for project oversight. They will be in charge of overseeing final reports and design for the project. The senior engineer will be the primary contact with the client along with other project management tasks.
Experience: Professional Licensure (PE), Structural Engineer License (SE), and 10 years experience in structural engineering.
Engineer
The Engineer will be prioritizing the design and modeling for the project. Preliminary analysis of constraints and analysis will be conducted to perform the structural design and analysis of the scale model bridge. They will be responsible for coordination and oversight of both the drafter and technician to ensure all elements of the bridge has been included.
Experience: Engineer in Training (EIT) with 3 years experience in structural engineering, along with a PE or SE licensure
Technician
The Technician will be responsible for coordination for welding and fabrication. Working alongside the Engineer and Drafter, they will help with detailing shop drawings for the bridge. They will be responsible for inspecting and constructing the bridge to abide by the AISC rules.
Experience: They would have 5 years experience with shop drawings including various structural and welding elements.
Drafter
The drafter will be responsible for transposing the 3D Model into AutoCAD shop drawings. They will work alongside the Technician and the Engineer to produce detailed shop drawings for fabrication.
Experience: Over 2 years of experience with drafting for several civil and structural engineering projects.
The Ponderosa SteelJacks began the project 9/4/2023, and scheduled to finish on 4/26/2024. With our milestones revolving around ISWS competition and NAU Capstone Deliverables, the team will complete as schedule suggests. The schedule shows all tasks and milestones associated with the project.
Cost of Engineering Services
Our services for the project includes the expected hourly work completed by the staffing team, along with various products required to complete the project. The Ponderosa SteelJacks along with some of our sponsors will fund the scale bridge model project with all materials and travel required to complete and compete in the International Southwest Symposium. The cost of services below show the personnel costs, travel costs, subcontracting costs for welding, and other miscellaneous costs associated with the supplies and equipment for the project.
Impact Analysis
In order to determine whether the project should be implemented, and impact analysis was conducted to determine the environmental, economic, and social impact of the project. The team identified two alternatives, one being the implementation of the bridge, and the other not implementing the bridge.
Environmental
As the team analyzed the environmental part of this project, there was a lot of positives in regards to the no bridge implementation. ​Part of this stems from the idea that steel fabrication, construction, and other potential pollutants has reduced the environmental impact on the bridge being implemented. Although the bridge would disallow foot traffic on paths that could negatively impact the neighboring fauna, the positive impacts for the bridge being implemented was not ranked as high.
Economic
The economic impact on implementing the bridge showed very positive results. As the bridge is meant for a Disc Gold Course, implementing the bridge to connect and expand on this course would cause an influx in clientele. Although the steel fabrication would be high, the overall implementation would cause the park to be used more and provide work for fabricators and constructors. This resulted in high rankings to implement the bridge.
Social
The social impacts of the project was very positive. Upon review, the social impact showed that with the implementation of the bridge, it would provide access to new pathways. With new additions coming from the gold course, park patrons will participate in more park activities along with show desire to upkeep the park. The bridge also adds some aesthetic appeal as it will be created to focus maintaining the parks appeal. This resulted in high social ranking to implement the bridge.