1. Design Project #1 Prof. Berezniak Presented to: Spring 2017
Replacement of Vehicle Bridge over Puddintown Road, College Township, PA
Introduction to Engineering design
EDSGN 100 Section 001
Team E-MRDJ
Engineering Masters (by) Reliable Design Jobs
Team 2
Andrew DeLuca
Dalal Malallah
Erica Salvo
Mariah Alfaraj
Presented to:
Prof. Berezniak
Spring 2017

2. Statement of the problem
A flood destroyed a bridge that is located on Puddintown Road, College Township, PA.
The bridge was a connection point to Mount Nittany Medical Center
Vital lifeline vehicles must take a lengthy detour, putting the students and faculty at major risk
Significant traffic increase

3. Project Objective PennDOT initiated an emergency
Design a new bridge to replace the one destroyed in the flood
Must be done is fast, cost-efficient manner

4. Required design criteria
Howe Truss bridge
Warren Truss bridge

5. Warren Phase 1: Economic Efficiency
-Cost was minimized by using carbon steel bars instead of Tempered steel.
-Reducing the size also reduced the cost.
- Final cost $236,764.89

6. Warren Phase 2: Structural Efficiency Load / mass of the bridge
Structural efficiency was (highest)
lowest was
Average structural efficiencies =
Load weight that our bridge heald = 76 lbs
Failed: overload on one joint

7. Howe Phase 1: Economic Efficiency Total Cost: $256,047.65
13 carbon steel tubes ( more expensive), 28 carbon steel bars

8. Howe Phase 2: Structural Efficiency
Member 31 in the simulation was the most “at risk” for failure with for tension.
Weight = 84.6 grams
Load at Failure = grams

9. The Best Solution
Warren is the better option for bridge type because it is the most cost and structure efficient; $19, less to build.
Means for the overall warren versus truss are significantly lower for the Warren, so not only did our experiment prove the Warren is successful, but our class as a whole.

10. Our Conclusions
The goal was to provide a design of of a truss bridge that meets that is both cost and structural efficient, and to do it fast.
Both the digital design and the model showed that the warren truss is best.

11. Our Recommendations
We recommend to build the Warren model which is proven to meet the required criteria.
Consider a change on the overloaded joint.