What happens During an Engineering Site Visit

For many engineering projects, some of the most important information cannot be found in drawings, reports, or photographs; it must be observed firsthand at the engineering site visit.

An engineering site visit allows the project team to evaluate existing conditions. They will also verify available information, take measurements, identify potential concerns, and gain a better understanding of how a building or site functions. Engineers may do site visits before design begins, during construction, or near project completion. The information gathered onsite can directly affect the design, scope, schedule, and cost of a project.

As Anthony Osborne explained, completing a project without a site visit can be like “trying to finish a puzzle without the box showing you what it is.”

Preparing for the Site Visit

Preparation often begins before the engineer arrives onsite. Depending on the project, the engineering team may review existing drawings, previous reports, proposed plans, equipment information, and applicable building or safety codes. However, existing drawings do not always reflect current conditions. Buildings and sites change over time. Equipment may be replaced, spaces may be renovated, utilities may be relocated. Previous improvements may not appear on the available drawings. Clients can help make the visit more efficient by providing the most up to date drawings. Ensuring that necessary rooms and areas are unlocked. Also, having a facility representative available who knows the building and the location of its equipment.

According to Brett Kramer, P.E., engineers cannot always count on as-built drawings to be completely accurate. A site visit allows the team to compare the available documentation with what is present.

What Engineers Look for Onsite

What an engineer examines during a site visit depends on the project and the engineering discipline involved.

Mechanical engineers may document existing HVAC and plumbing systems, including equipment, ductwork, meters, backflow preventers, utility connections, and the location where sanitary service leaves the building. They may also evaluate whether existing equipment is installed properly and complies with current codes.

Electrical engineers may examine the size and location of utility services and transformers, switchgear and electrical-panel ratings, available panel capacity, phase, voltage, and amperage. They may also evaluate available space for new circuit breakers, potential routes for conduit, cable trays, or underground duct banks, and the required working clearances around existing and proposed electrical equipment.

Civil engineers evaluate the overall site and look for obstacles or conditions that could affect development. This may include drainage patterns, low-lying areas, flood zones, potential wetlands, protective trees, utilities, and other features that may not be fully represented on the plans.

Engineers are also looking for conflicts between different systems. A proposed electrical route, for example, may interfere with plumbing, ductwork, structural components, or other existing equipment.

Documenting Existing Conditions

Engineers use a variety of tools to document what they observe. Depending on the project, these may include:

• A phone or camera for photographs
• Tape measures and laser-measuring devices
• Measuring wheels
• Flashlights
• Existing engineering or architectural drawings
• Field notes and sketches
• Equipment nameplate information

Photographs help document existing equipment and site conditions for later reference. Engineers may also mark notes directly on drawings to identify demolition areas, equipment locations, or potential routing.

Thorough documentation gives the design team reliable information to reference after leaving the site and helps support coordination between engineering disciplines.

Seeing What Others May Overlook

Clients understand how their building or site is used each day, but engineers evaluate it from a different perspective. What may appear to be an open location for new equipment could involve many different obstacles. For instance, limited electrical capacity, inadequate ventilation, utility conflicts, required service clearances, or code-related concerns.

Engineers are trained to notice these less obvious conditions and understand how one change may affect other systems. Identifying them during a site visit helps the project team avoid design conflicts, unexpected construction costs, and performance problems later.

When Site Conditions Change a Project

The Kramer Engineers team has encountered several situations in which an onsite observation affected a project’s design, budget, or construction.

During one commercial site visit, the electrical team discovered that the building contained a certain type of electrical panels that were flagged as major fire hazards and required immediate attention. Because these panels can present safety concerns and may require replacement rather than a simple upgrade, the discovery affected the project’s scope, budget, and timeline.

On another project, Brett Kramer and Aaron Fessler discovered that two existing HVAC units did not have outside air ducted to them. This created questions about whether the systems met current ventilation requirements and required additional discussion with the client.

Civil site visits have revealed drainage installations that would not function as intended. In one instance, a pipe extending above the ground caused permanent ponding because the water could not drain properly.

Exposed pipe causing ponding

In another, a catch basin had been installed too high. Because a catch basin must be at or slightly below the surrounding grade, water was unable to flow into it effectively.

These examples show why field observations are so important. Identifying an issue early gives the project team an opportunity to develop a solution before it leads to more extensive repairs, construction delays, or added costs.

Site Visits During Construction

Site visits are not limited to the beginning of a project. During construction, engineers may visit the site to observe installation progress, answer questions, discuss unexpected conditions with the contractor. This will help resolve differences between the plans and actual field conditions. For medium and larger projects, engineers may also perform a final walkthrough and prepare a field report or punch list identifying outstanding items that should be addressed before the project is considered complete. While engineers cannot observe every moment of construction, these visits provide valuable opportunities to confirm that the work generally aligns with the project documents and design intent.

Turning Observations into Better Solutions

A successful engineering design must respond to the building or site as it exists; not simply as it appears on paper. By combining available documentation with measurements, photographs, firsthand observations, and conversations with the people who use and maintain the facility. Then engineers can make more informed decisions. Site visits help uncover challenges, confirm design assumptions, improve coordination, and reduce the likelihood of unexpected costs during construction.

At Kramer Engineers, site visits are an important part of understanding each project. Our multidisciplinary team evaluates existing conditions from multiple perspectives to develop practical, coordinated solutions that support the client’s needs and project goals.