Parrish Structural Reinforcements (PSR) is a specialty engineering firm focused on mechanically stabilized earth (MSE) walls, reinforced soil structures, precast concrete systems, and related transportation infrastructure.
Our experience is rooted in complex transportation and design-build projects, where retaining wall engineering must account for much more than basic wall stability. PSR provides engineering for permanent precast-panel MSE walls, temporary and permanent wire-faced walls, precast modular block systems, crash walls and barrier-supported wall systems, hybrid retaining structures, and other specialized applications.
Our capabilities also extend beyond retaining walls to precast concrete and bridge-related systems, including structural analysis, component design, forming systems, and project-specific engineering for transportation structures.
We work with wall suppliers, engineering consultants, contractors, and design-build teams from preliminary design through final engineering. Our role may include retaining wall design, independent technical review, calculations, construction drawings, production drawings, design-tool development, and agency coordination.
Large transportation projects require engineers who understand both the calculations and the realities of project delivery.
PSR has extensive experience supporting design-build transportation projects where geometry, structures, utilities, wall systems, design interfaces, and project schedules must all be coordinated simultaneously. Our approach emphasizes practical engineering, clear documentation, efficient coordination, and early identification of conditions that could affect the design.
We understand that specialty engineering is only one part of a much larger project. Our goal is to provide engineering that integrates effectively with the wall supplier, contractor, structural engineer, geotechnical engineer, and owner.
PSR typically works as the specialty MSE engineer within a larger project team.
For supplier- and contractor-led projects, we develop our engineering around the contract plans, project specifications, geotechnical recommendations, applicable agency criteria, and the requirements of the selected wall system.
Our focus is to identify controlling design conditions early, address them within the engineering, and produce clear documentation that can move efficiently through the project review process.
For independent review and consulting assignments, we provide focused technical evaluation while maintaining a clear distinction between our scope and the responsibilities of the project engineer of record.
We provide comprehensive engineering, design calculations, layout drawings, and stamped documentation for permanent precast-panel MSE wall systems across highway, infrastructure, and commercial projects.
We design wire-faced MSE wall systems tailored for staged construction, temporary grade separations, or sites where standard precast-panel facings are impractical.
We offer independent technical evaluations of calculations, drawings, and proprietary components to ensure MSE wall designs comply with project specifications and agency criteria.
We provide structural and geotechnical engineering for modular block and large-block retaining wall systems, encompassing gravity, reinforced-soil, and custom project configurations.
Beyond MSE facing panels, we deliver structural calculations, reinforcement design, and custom detailing for a variety of precast concrete components used in transportation and infrastructure.
We deliver structural analysis, component design, and technical documentation for specialty manufactured systems, forming solutions, and proprietary bridge products.
We offer preliminary feasibility and constructability consulting during initial planning to identify geometry, utility, and site constraints before final design and avoid costly construction conflicts.
Partner with our team from early-stage planning through final stamped design to prevent constructability issues, streamline approvals, and build with complete technical confidence.