What does a structural engineer evaluate?

A structural engineer evaluates how a building or structure is performing and whether observed conditions may require monitoring, additional investigation, repair, strengthening, or retrofit planning. Depending on the project, the evaluation may consider structural materials, framing systems, foundations, visible deterioration, cracking, movement, corrosion, previous repairs, changes in loading, planned renovations, and available design or maintenance records. The appropriate scope depends on the structure and the decisions your team needs to make. A focused evaluation of one concern is different from a broader structural condition assessment.

When should a building have a structural condition assessment?

There is no single assessment schedule that fits every building. A structural condition assessment may be appropriate when a structure shows visible deterioration, recurring cracking, movement, corrosion, settlement, water-related damage, or other changes that raise questions about performance. An assessment can also be useful before a major renovation, adaptive-reuse project, change in building use, equipment installation, property transaction, or long-term capital-planning decision. If a condition creates an immediate safety concern, restrict access to the affected area and contact the appropriate building official, emergency authority, or qualified structural engineer promptly.

Does a crack always mean a building has a structural problem?

No. A crack does not automatically mean that a building has a serious structural problem. The significance depends on factors such as the material, location, pattern, width, depth, age, surrounding conditions, and whether the crack is changing over time. A recurring, widening, displaced, or unusual crack may warrant closer evaluation, especially when it appears alongside movement, settlement, moisture exposure, spalling, corrosion, or other visible distress. The goal of a structural review is to understand the condition in context rather than assume that every crack has the same cause or requires the same response.

What are common signs that a structure may need closer evaluation?

Conditions that may warrant closer evaluation include: Recurring, widening, or unusual cracking Concrete spalling or exposed reinforcing steel Corrosion, rust staining, or visible material loss Settlement, movement, or uneven floors Deflection, deformation, or sagging Water intrusion affecting structural elements Damage following a fire, impact, storm, or other event New equipment, storage, or uses that may increase structural loads These conditions do not provide a diagnosis on their own. They are signals that the structure may benefit from a closer review by a qualified professional.

What is included in a structural condition assessment?

A structural condition assessment is a focused evaluation of a building or structure intended to clarify observed conditions, identify potential concerns, and establish practical next steps. Depending on the scope, the assessment may include document review, site observations, condition mapping, photographs, review of previous repairs, non-destructive testing, limited calculations, monitoring recommendations, and prioritization of repair or investigation needs. The result should help you understand what appears to be happening, which findings matter most, and whether the appropriate next step is monitoring, testing, repair design, strengthening, or a more detailed investigation.

What is non-destructive testing in structural engineering?

Non-destructive testing, often called NDT or NDE, uses scientific techniques to evaluate materials and structures without causing meaningful damage to the element being reviewed. Depending on the structure and the concern, testing may help identify flaws, locate reinforcing steel, evaluate material conditions, or gather information that is not available through visual observation alone. The appropriate method depends on the material, the suspected issue, and the goals of the evaluation. The American Society for Nondestructive Testing explains the distinction between non-destructive testing, inspection, and evaluation.

What is the difference between a Property Condition Assessment and a structural assessment?

A Property Condition Assessment and a structural assessment serve different purposes. Property Condition Assessment: Provides a baseline review of the physical condition of improvements at a commercial property. It is commonly used for transactional due diligence and is not intended to be technically exhaustive. Structural assessment: Provides a more focused evaluation of structural conditions, observed distress, performance questions, or repair needs. A baseline PCA may identify a structural concern that warrants additional investigation, but it should not automatically be treated as a comprehensive structural evaluation. Review the official ASTM E2018-24 guide for Property Condition Assessments.

Can an existing structure be strengthened instead of replaced?

In some cases, yes. Structural strengthening may be a practical alternative when a structure has deteriorated, needs to carry new loads, is being renovated for a different use, or requires improved performance. The right answer depends on the existing condition, structural system, project goals, constructability, budget, and long-term value of the improvement. Strengthening is not appropriate in every situation, but it can allow an existing structure to continue serving a useful purpose when replacement is not the best option. For seismic work, FEMA documents a range of common rehabilitation and retrofit techniques for existing buildings. Review the official FEMA guidance on seismic rehabilitation techniques.

When should a foundation evaluation be performed?

A foundation evaluation may be appropriate when a property shows signs of settlement, recurring cracking, movement, uneven floors, retaining-wall displacement, slab concerns, or changes that may affect how loads are transferred into the ground. A foundation review may also be useful when planning an addition, installing heavy equipment, changing the use of a structure, or evaluating previous repairs that have not resolved the visible symptoms. The goal is to understand the source of the concern before investing in a repair that addresses only the most visible symptom.

Should a building be structurally evaluated before a renovation, adaptive-reuse project, or equipment installation?

A structural evaluation may be appropriate when a project changes how a building will be used or alters the loads placed on the structure. Examples include new equipment, heavier storage, rooftop units, changes to floor layouts, openings in existing walls or slabs, additions, adaptive reuse, and modifications that affect structural elements. Early structural input can help your team understand what the existing structure can support, identify strengthening needs, and avoid design decisions that become harder or more expensive to revise later.

Should a structure be evaluated after a fire, impact, storm, or water-related event?

A focused structural evaluation may be warranted after a fire, vehicle impact, storm, flood, water intrusion, or other event that could affect structural materials or load paths. The visible condition may not reveal the full extent of the issue. Depending on the event, the next step may include restricting access, documenting conditions, coordinating with the appropriate authorities, conducting additional testing, or developing repair recommendations. For broader post-disaster safety evaluation guidance, review the official FEMA Post-disaster Building Safety Evaluation Guidance.

What is a seismic evaluation?

A seismic evaluation assesses how an existing building or structure may perform during an earthquake and identifies potential vulnerabilities that may warrant closer review or retrofit planning. The evaluation may consider the structural system, foundations, site hazards, materials, nonstructural components, performance goals, and the level of seismic hazard relevant to the project. ASCE/SEI 41-23 is a key standard for the seismic evaluation and retrofit of existing buildings. It uses performance-based principles and a three-tiered evaluation process.

When should an existing building be evaluated for seismic retrofit?

A seismic evaluation may be appropriate when an owner wants to better understand the vulnerabilities of an existing building, improve resilience, support a renovation, meet applicable local requirements, or plan investments for a critical facility. The appropriate strategy depends on the structure, site conditions, building use, seismic hazard, and desired performance level. An evaluation does not automatically mean that a retrofit is required. It helps clarify the risks, priorities, and practical options. Review the official ASCE/SEI 41-23 overview and FEMA seismic-retrofit technical guidance.

What is a rope-descent system anchorage?

A rope-descent system, often called an RDS, allows a worker to descend in a controlled manner and stop as needed to perform work. These systems are commonly associated with building-maintenance activities such as façade access or window cleaning. An RDS typically includes a roof anchorage, support rope, descent device, connectors, and a chair or seatboard. OSHA distinguishes rope-descent systems from industrial rope-access systems. Review the official OSHA walking-working surfaces and rope-descent-system FAQs.

How often do rope-descent-system anchorages need to be inspected and certified?

Before a rope-descent system is used, OSHA requires the building owner to provide written confirmation that each anchorage has been identified, tested, certified, and maintained so it can support at least 5,000 pounds in any direction for each employee attached. The information must be based on an annual inspection by a qualified person and certification by a qualified person as necessary and at least every 10 years. These requirements apply specifically to rope-descent-system anchorages. They should not be generalized automatically to every fall-protection component or system. Review the official OSHA Standard 29 CFR 1910.27.

Can Walker support a project after the structural assessment is complete?

Yes. A structural assessment is often the starting point rather than the final step. Depending on the findings, the next phase may include monitoring, additional testing, repair design, strengthening strategies, retrofit planning, technical drawings, specifications, construction-phase support, or coordination with a broader renovation or capital plan. The goal is not simply to document the concern. It is to help you understand what should happen next and move forward with a practical path for the structure.

Structural Engineering – Walker Consultants

Walker Building System Services

Structural Engineering

Visible deterioration is often only part of the story. Cracking, movement, corrosion, changing loads, and aging materials can point to conditions that require a closer look. Walker helps you understand what is happening, identify the priorities that matter most, and develop practical repair, strengthening, and retrofit strategies so you can move forward with confidence.

Contact A Structural Engineering Professional

See the full picture

Understand what the structure is telling you.

A crack may be isolated, or it may be one visible sign of a larger issue. Surface deterioration can point to deeper material loss. Changes in use, loads, or building performance can create questions that are difficult to answer without understanding how the structural system works as a whole. Walker helps you see what others may miss. We evaluate structural conditions, identify potential sources of distress, and help you understand which findings require immediate attention, which should be monitored, and which can be addressed through a longer-term repair or strengthening plan. The goal is not simply to document what is visible. It is to give you a clearer basis for making decisions that protect the service life, performance, and value of your structure.

What we support.

Structural engineering services

Structural Condition Assessments

We evaluate structural systems, visible deterioration, and areas of distress to identify repair priorities, maintenance needs, and conditions that may warrant closer investigation.

Structural Repair Design

We translate assessment findings into practical repair solutions, drawings, specifications, details, product recommendations, and testing provisions.

Structural Strengthening & Retrofit

We develop strategies to restore or increase load-carrying capacity when structures deteriorate, uses change, loads increase, or resilience goals evolve.

Foundation Evaluations & Repairs

We evaluate foundation conditions and design repairs for slab-on-grade systems, retaining walls, shallow and deep foundations, machine foundations, and related support systems.

Seismic Evaluation & Retrofit

We assess seismic vulnerabilities and develop strengthening or retrofit strategies for buildings, infrastructure, industrial facilities, and non-building structures.

Fall Protection & Façade Access

We design, evaluate, inspect, and test permanent fall-protection and façade-access systems, including davits, davit bases, and anchorages.

STRUCTURAL QUESTIONS WORTH ANSWERING EARLY

The Visible Problem Is Only the Starting Point

Cracking, corrosion, movement, settlement, and visible deterioration can raise immediate questions. But the condition you can see is not always the full story. The real challenge is understanding what the structure is telling you, how urgent the concern may be, and what should happen next.

Is the Condition Isolated or Part of a Larger Pattern?

A visible crack may be cosmetic, localized, or one sign of a broader structural concern. Surface deterioration may point to moisture exposure, corrosion, material loss, movement, or changing demands on the structure. Age, materials, loading history, environmental exposure, drainage, previous repairs, and planned future use can all affect how the condition should be understood.

Walker evaluates structural concerns in context. We help you determine whether the condition appears limited, whether additional investigation may be warranted, and whether the issue should be monitored, repaired, or incorporated into a longer-term plan.

What Needs Attention Now, and What Can Be Planned Over Time?

Not every structural concern requires the same response. Some conditions may need prompt action. Others may be managed through monitoring, maintenance, or a phased repair strategy. The important part is separating the urgent from the manageable before a small issue becomes a larger disruption.

Walker helps owners, facility teams, and project stakeholders prioritize structural needs based on the condition, the potential impact, and the decisions ahead. That gives you a clearer basis for budgeting, sequencing repairs, and protecting the long-term performance of the structure.

What Is the Right Next Step?

A useful structural evaluation should lead to a practical path forward. That may mean documenting the condition, conducting additional testing, monitoring changes over time, developing repair documents, evaluating strengthening options, or coordinating the work with a broader renovation or capital plan.

You do not need to diagnose the issue on your own. You need the right questions answered early enough to make informed decisions and move forward with confidence.

Structural Concern Decision Guide

What Are You Seeing, and What Should Happen Next?

Structural concerns do not always reveal their cause at first glance. Use this guide to identify when a closer evaluation may be warranted and which type of structural-engineering support may be the right place to start.

Showing all structural concerns.

Structural concern decision guide showing common visible conditions, possible concerns to explore, recommended starting points, and why structural review may be useful.
What You Are Seeing or Planning	Possible Concern to Explore	Recommended Starting Point	Why It Matters
01 Cracking, Spalling, Corrosion, or Exposed Reinforcing Steel	Localized deterioration, material loss, moisture-related exposure, or a broader structural-performance concern.	Structural condition assessment	Visible deterioration may be one part of a larger pattern. Reviewing the condition in context can help determine whether monitoring, repair, or closer investigation is appropriate.
02 Settlement, Movement, Uneven Floors, or Recurring Cracks	Foundation movement, changes in structural behavior, or conditions that may be affecting how loads are transferred.	Foundation evaluation or structural assessment	Understanding the source of the condition helps avoid cosmetic repairs that do not address the underlying issue.
03 A Change in Building Use, Layout, Storage, or Equipment	New or increased demands on the structural system.	Load-capacity evaluation and strengthening review	A structure may need to support conditions it was not originally designed to carry. Early review can help clarify what is feasible before the broader project moves forward.
04 Fire, Impact, Storm, or Water-Related Damage	Localized damage or effects that may extend beyond the most visible area.	Focused structural assessment	The visible condition may not show the full extent of the issue. A targeted review can help identify whether additional evaluation, repair planning, or temporary measures should be considered.
05 Planned Renovation, Restoration, or Adaptive Reuse	Repair needs, strengthening requirements, new loads, or coordination between existing conditions and proposed work.	Structural assessment and repair-design review	Early structural input can help align the repair or strengthening strategy with the broader project scope before design decisions harden.
06 Seismic-Resilience Concerns or Retrofit Planning	Structural vulnerabilities, performance goals, or retrofit needs based on the system, site, and intended use.	Seismic evaluation and retrofit review	The right approach depends on the structural system and the level of performance the project needs to achieve.
07 Davits, Façade-Access Equipment, or Rope-Descent Anchorages	Inspection, testing, certification, maintenance, or design needs.	Fall-protection and façade-access review	Building owners may have ongoing responsibilities for rope-descent-system anchorages, including written confirmation that each anchorage has been identified, tested, certified, and maintained. Review OSHA 29 CFR 1910.27.

This guide is a starting point, not a structural diagnosis. The appropriate next step depends on the structure, the condition, the available information, and the decisions your team needs to make.

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Structural Engineering

Understand what the structure is telling you.

What we support.

Structural Condition Assessments

Structural Repair Design

Structural Strengthening & Retrofit

Foundation Evaluations & Repairs

Seismic Evaluation & Retrofit

Fall Protection & Façade Access

The Visible Problem Is Only the Starting Point

Is the Condition Isolated or Part of a Larger Pattern?

What Needs Attention Now, and What Can Be Planned Over Time?

What Is the Right Next Step?

What Are You Seeing, and What Should Happen Next?

People who know what to look for.

Abhishek Aggarwal

Al Bustamante

Alex Katz, PE

Behnam Arya

Charles Hammond

Dan Moser

David Mehl

Diego Romero

Enrique Villalobos

Ibrahim Erdem

James Zeller

John Crase

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Questions about Structural Engineering