Pelphrey
Prestress Partners
Providing engineering and drafting services to precast, prestressed concrete manufacturers.
Services
Prestressed Concrete Design & Drafting
- Bridge beam and component design and analysis
- Erection drawing, shop drawing and piece ticket preparation
- Prestressed beam lateral stability and stress analysis
- Prestressing strand stressing calculations
- Plant component design and analysis
Marketing
- Customer engagement
- Presentations and Lunch-and-Learns
- Trade Shows
- Technical marketing material development
Preconstruction
- Bridge beam type and size selection
- Quantity take-off and cost estimating
- Initial concept development
- Value engineering assistance
Quality Control & Plant Specialty Services
- Stressing ram calibration
- PCI exam proctoring (More Info)
- Quality Control documentation review
- Quality systems development
Featured Projects
Cutler Road Bridge over the Looking Glass River
- Provided Project Management and Bridge Beam Engineering services while employed at Williams & Works in Grand Rapids, Michigan
- Located in Ionia County, Michigan
- Longest single span prestressed concrete bridge over water in the State of Michigan, with a span length = 171’-0” and an out-out beam length of 173’-0”
- Each of the four beams weigh 126 tons
I-5 Over Sodom Ditch
- Provided Value Engineering, Project Coordination and Bridge Beam Engineering services while employed at Knife River Prestress in Harrisburg, Oregon
- Located in Linn County, Oregon
- The original three-span steel tub bridge was converted to a three-span precast, post-tensioned concrete tub bridge through value engineering techniques
- The conversion improved the project’s schedule and reduced its cost compared to the original design
Events & Publications
- PCI’s Aspire Magazine – Spring 2025 Edition
2025 Oregon Bridge Design Training
- North Spokane Corridor Prestress Spliced Girder Fabrication
- Presentation given May 6th, 2025
- Agenda: Click Here
- Abstract: Click Here
Culter Road Bridge over Looking Glass River
- PCI’s Aspire Magazine – Summer 2023 Edition
- Article developed while employed with Williams & Works, Inc.
- Click here for a PDF of the article
Michigan Bridge Conference
- Michigan Bridge Week 2021
- Presentations given while employed with Williams & Works, Inc.
- Agenda: Click Here
Prestressed Concrete 101
- Blog article posted while working for Williams & Works
Specialty Precast Solutions
- AREMA Conference Proceedings · Aug 1, 2016
- Presentation given while employed with Knife River Prestress
- Abstract: Click Here
- Presentation: Click Here
State-Specific LRFR Live Load Factors Using Weigh-in-Motion Data
- JOURNAL OF BRIDGE ENGINEERING (ASCE) · Jul 1, 2008
An Investigation of Oregon Weigh-In-Motion Data for Bridge Rating Implementation and Evaluation
- Oregon State University – June 16, 2006
Calibration of LRFR Live Load Factors Using Weigh-In-Motion Data
- SPR 635, Interim Report, FHWA-OR-RD-06-17 · Jun 1, 2006
About Pelphrey Prestress
P3 has over 20 years of experience in the precast, prestressed concrete industry. We hold registered professional engineering licensure in multiple states, including Oregon, Washington, Michigan, Idaho and Montana. P3 is active in the Precast/Prestressed Concrete Institute (PCI), serving on various committees and providing peer review for technical publications. We have a passion for advancing the industry and contributing to the growth of its people and services. Please contact us for more information on future partnering opportunities.