The work, and what it was for.

Ten project stories: what North Fork did, what it delivered, and the decision each one supported. Completed engagements first; programs still in progress follow.

Completed engagements

The brick Fine Arts Center in Panama City, Florida, with arched windows and palm trees
Project photograph.
Structural model of the Fine Arts Center steel framing
Structural model of the steel framing.

Fine Arts Center

Panama City, Florida. Local engineering and fabrication support.

North Fork provided signed and sealed structural steel design for a Fine Arts Center in Panama City. When larger national suppliers faced delays, North Fork worked with a local steel fabricator to support fabrication, connecting the structural design to the people building it.

North Fork’s role
Structural steel design, sealed documents, local-fabricator coordination
Why it matters
Responsive engineering for a project in our own community
Status
Completed
Finite element analysis of a long-span roof section with stress contours, scale, and model axes
Analysis of the roof section for the reported lift configuration.

Long-span roof lift

Structural analysis and construction support.

Moving a long-span roof changes the way it carries its own weight. North Fork analyzed the roof section to help the contractor understand its response during pick-and-place operations and planned the lift around the predicted movement.

Predicted and observed roof deflection agreed within ⅛ inch for the reported roof and lift configuration.

North Fork’s role
Structural-response analysis, deflection prediction, lift-planning support
What it supported
Practical construction decisions grounded in the modeled behavior
Status
Completed
Existing steel roof trusses photographed from below, with representative field dimensions marked in red
Existing roof framing documented during a site-specific evaluation.

New equipment on existing roof steel

Existing facilities. Field work and structural evaluation.

New rooftop equipment puts concentrated loads into a building that may have incomplete record drawings and limited access. The question runs from the equipment feet through the deck, the joists, and the main trusses, with wind, stability, and roof protection shaping where the unit can go.

North Fork combined field documentation, representative measurements, equipment data, and structural calculations to evaluate the proposed installations. For one building, the analysis checked foot locations across the deck span and the demands they put into the joists and trusses. A second building got a preliminary evaluation and a defined list of what is needed to finish it.

For one facility, the evaluation supports direct placement with no added support steel, subject to the documented site conditions and pre-installation checks.

North Fork’s role
Field coordination, structural calculations, placement criteria
Delivered
Calculations, evaluation reports, placement and field-conformance requirements
Status
One facility released for placement; the second remains a review draft pending further verification
Analysis model of a trussed modular building frame with pinned eave connections
The modular frame as modeled, with the eave connections under study.
Member-force contour plot of the frame and a transient response history from the connection study
Member-force response and a transient history for one modeled connection case.

Modular connection development study

Modular structures. Nonlinear analysis and concept evaluation.

A product team wanted to know whether an alternative eave connection could change how a modular frame behaves in an earthquake, and which properties deserved attention before building hardware.

North Fork ran four transient simulations under the same imposed earthquake displacement history, varying the connection’s force–displacement behavior, and compared member axial-force envelopes, support reactions, and frame motion. The comparison showed why initial stiffness and the force plateau have to be considered together: the softest connection was not the best option.

The study identified a candidate connection and the specific checks needed to validate its physical behavior.

North Fork’s role
Transient analysis, connection sensitivity, technical briefing
Delivered
Four-case comparison with model imagery, response histories, and recommendations
Status
Feasibility study complete. Next step: verify cyclic response and energy dissipation against real hardware.
Concept visualization of a large modular shelter with an open end wall
Concept visualization of a modular shelter.
Isometric line illustration of a trussed building frame
Representative illustration of framing and connections.

Modular enclosure redesign feasibility

Modular building systems. Concept engineering and estimating basis.

Changing a modular building’s openings, height, and enclosure layout affects the framing, the support interfaces, and the load path. Before committing to detailed design, the project team needed a credible picture of what the redesign would take.

North Fork reviewed the proposed configuration, developed concept-level engineering exhibits, and worked out the structural changes tied to the modified openings, roof, and walls. The package connected the concept to preliminary quantities, execution assumptions, and the main technical and cost uncertainties, with separate deployment scenarios so the team could see which work belonged in each estimate.

North Fork’s role
Concept engineering, quantities, estimate and risk review
Delivered
Technical reports, concept exhibits and sketches, quantity summaries, estimate workbooks, risk registers, and a comparison briefing
Status
Feasibility package issued. Final sizing, connections, sealed calculations, and fabrication drawings belong to a separately authorized design phase.
Finite element stress analysis of a cylindrical mechanical component, shown with blue contours
Component stress analysis from the North Fork portfolio.

Industrial equipment and supporting structures

Industrial facilities. Selected engineering assignments.

A platform, pedestal, or testing assembly can put demanding loads into a compact structural arrangement. The engineering has to connect the equipment’s forces with the members, connections, and components that carry them.

North Fork’s industrial assignments include structural design checks for tank platforms and pedestals, evaluation of testing assemblies, and analysis of equipment-support components. Finite element stress analysis is used where a component’s geometry or response needs a closer look than a conventional member check.

North Fork’s role
Load-path review, component stress analysis, design documentation
Delivered
Design-check documentation, component evaluations, and sealed engineering documents where they form part of the engagement
Construction crew lifting a prefabricated steel truss into position with a crane
Representative prefabricated-truss installation, showing the fabrication and field interfaces the procedures cover.

Design-check and review procedures for a growing manufacturer

Modular manufacturing. Engineering quality and delivery.

As an engineering organization grows, a technical issue can travel through models, drawings, purchasing information, and fabrication details. The team needed clear responsibilities and a consistent way to show what had been checked, which interfaces were still open, and when a package was ready for its next use.

North Fork developed a framework for design checking and interdisciplinary review: entry criteria, independent verification, reviewer responsibilities, comment resolution and back-checks, and escalation routes. It also tied design information to fabrication and field interfaces, and separated technical verification from the decision to authorize fabrication.

North Fork’s role
Process development, responsibility mapping, implementation sessions
Delivered
Tailored procedures, workflow diagrams, role maps, and project trackers
What it established
A documented route for assigning an issue, resolving it, and showing evidence of closure

Programs in progress

Ongoing work, described as it stands in 2026.

The full-scale specialty structure, lifted by crane, being set on the outdoor shake table
The full-scale test structure going onto the shake table.
Interior of the test structure showing the arched frames and the steel test supports
Inside the test structure: framing and supports.
The test control room: an operator at a bank of monitors showing instrumentation readouts
Test control and monitoring during the shake-table runs.
Plot of measured and calculated displacement histories for one shake-table test, showing closely matched decaying oscillations over 30 seconds
Measured and calculated displacement response for one test comparison.
Static total-deformation contour plot of the full structural model, with its numerical color scale in inches
Static total deformation of the full model under a static load case. Units: inches.

Seismic qualification of a specialty structural system

Specialty structural systems. Modeling, full-scale testing, and technical review.

A specialty building system needed an engineering basis for its response to earthquake loading. That takes a coordinated program: an analytical model of the structure, physical tests that match the model’s conditions, measured motion, and the review that reconciles them.

North Fork leads the effort, coordinating nonlinear modeling, physical testing, and review of the resulting evidence. System and component models support investigation of structural behavior, while measured shake-table response provides the basis for checking the predictions. The comparison looks at the shape and timing of displacement histories and at peak response.

North Fork’s role
Program leadership, nonlinear modeling, test coordination and correlation
Delivered so far
Analytical models, response plots, and technical materials connecting the test configuration to the engineering interpretation
Status
Modeling and physical testing complete. Reconciliation and the qualification review continue in 2026; formal qualification is the next milestone.
Representative illustration of a precast enclosure with an access opening in its roof
Representative illustration. Project-specific geometry and details vary by assignment.

Precast utility vaults

Precast and infrastructure. Structural analysis and reinforcement detailing.

Modifying a utility vault affects more than its interior space. Traffic, earth pressure, groundwater, and openings have to be considered together, with the roof, walls, sectional joints, and base acting as one continuous load path, and the pieces still have to be cast, assembled, and handled.

For one vault, North Fork evaluated AASHTO LRFD HL-93 roadway loading and a configuration without a central steel post, covering concrete flexure and shear, access-frame bearing, shiplap-joint transfer, base support, and flotation. A separate assignment developed vault-height modification alternatives. Reinforcement detailing coordinated bar cover, development and laps, opening trimmers, and replacement of bars interrupted by utility penetrations.

North Fork’s role
Component evaluation, structural design basis, reinforcement detailing
Delivered
Calculations, arrangement drawings, reinforcement plans and bar schedules, opening details, joint-interface requirements, and inspection and release provisions
Status
Review packages prepared. Final professional review, signature, and seal pending, with project-specific openings, material records, and production checks to close before release.
Base document Addendum 2 Requirements register Design criteria, clause 4.2 Revised obligation, item 7 Design criteria Revised obligation Required deliverable Linked Changed Linked Each requirement keeps its source and date. Changes are flagged for engineering review.
Illustrative workflow: source documents, later addenda, and a reviewable register.

Requirements tracking tool

Engineering and proposal delivery. Custom tool and workflow development.

Requirements often arrive across a base document and a series of addenda. A team needs to find each obligation, keep its source, and understand how later information changes the working register, without losing the record of how it got there.

North Fork built a requirements extraction and review application and refined it against real document sets. It tracks source and date, takes in change documents, flags new, revised, and possibly duplicate requirements, and exports working registers to spreadsheets. Engineering review stays in the loop wherever an obligation depends on context or on several source passages together.

North Fork’s role
Application development, source tracking, change review
Delivered
A working prototype with a requirements database, a document-change workflow, and spreadsheet exports
Status
In iterative refinement

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