Parrish Structural Reinforcements (PSR) provides specialty engineering services for mechanically stabilized earth (MSE) walls, reinforced soil structures, precast concrete systems, and related transportation infrastructure.
Our primary clients are MSE wall suppliers, contractors, and design-build teams that need an experienced engineering partner for complex transportation projects. We also provide independent technical review and early-stage consulting for engineering firms and public agencies.
MSE wall engineering is the core of our practice.
PSR provides engineering for permanent precast-panel MSE wall systems used on highway, bridge, commercial, industrial, and other infrastructure projects. Our work includes conventional wall systems as well as applications involving bridge interfaces, traffic barriers, constrained geometry, complex loading conditions, and challenging site conditions.
We work with wall suppliers and contractors to develop complete engineering packages that coordinate with the contract plans, project specifications, geotechnical recommendations, applicable design criteria, and the requirements of the selected wall system.
Our MSE wall engineering services may include:
PSR provides engineering for temporary and permanent wire-faced MSE wall systems.
Wire-faced walls are commonly used for staged construction, temporary grade separation, permanent reinforced-soil structures, and projects where a conventional precast-panel facing system is not practical.
Our experience includes standalone wire-faced walls as well as temporary walls constructed in conjunction with permanent MSE walls and other retaining structures.
We develop the wall design around the project geometry, reinforcement system, loading conditions, construction sequence, and relationship to adjacent permanent structures.
PSR provides independent technical review of MSE wall designs for agencies, engineering firms, contractors, and wall suppliers.
Reviews may include engineering calculations, drawings, design assumptions, reinforcement systems, facing components, loading conditions, project specifications, and conformance with applicable design criteria.
Our experience with multiple MSE wall systems allows us to evaluate both the engineering assumptions and the interaction between the reinforcement, facing components, connections, and proprietary system details.
Independent review services may be provided for individual structures, complete projects, or proprietary MSE wall systems undergoing agency review or approval.
PSR provides engineering for precast modular block and large-block retaining wall systems used in transportation, commercial, industrial, and site-development applications.
These systems may include gravity walls, reinforced-soil walls, and project-specific configurations requiring structural and geotechnical evaluation.
Our precast engineering experience extends beyond MSE wall facing panels.
PSR provides structural engineering for precast concrete components and systems used in transportation and infrastructure applications, including component design, reinforcement design, structural calculations, and project-specific detailing.
PSR provides engineering for specialty products and manufactured systems used in bridge and transportation construction.
Services may include structural analysis, component design, forming systems, project-specific adaptations, and engineering documentation for proprietary products and systems.
Some of the most important retaining wall decisions are made before a project reaches final design.
PSR provides early-stage constructability and feasibility consulting for engineering firms, transportation agencies, and project owners during planning and design development.
The goal is to identify potential MSE wall challenges before the project is advertised for construction.
Early involvement can help evaluate:
This review can help the project team develop contract plans that better account for MSE wall requirements and reduce avoidable conflicts during final wall engineering.
Partner with our team from early-stage planning through final stamped design to prevent constructability issues, streamline approvals, and build with complete technical confidence.