Find the parameter schedule first and confirm there is one per generator type, then compare its rating and application with the one-line and load summary, and trace fuel storage, the day tank, exhaust, air intake, cooling, and the enclosure to the mechanical, civil, and architectural drawings. Where the set is installed indoors, check that the section’s auxiliary systems drawing requirement is matched by drawings of exhaust, intake, and cooling.
Assemble the review package
Gather the electrical one-line, load summary, and generator schedule, the parameter schedule (on the drawings or in the specification), the site plan for an outdoor set, the generator room plan and sections for an indoor set, the mechanical drawings for exhaust, combustion air, and cooling, the fuel tank and piping drawings, the structural pad or base details, and the issued Section 26 32 15 with Section 26 36 23. Review one generator from fuel to load before assuming a second set matches.
WBDG publishes UFGS 26 32 15: Engine-Generator Set Stationary 15-2500 kW, with Auxiliaries as a public guide-specification reference (accessed October 17, 2026). Use your project’s issued specification and amendments for the actual comparison; the guide specification does not automatically govern your project. The checklist below is an original suggested review workflow, not a reproduction of the UFGS requirements.
Eight checks to run against the issued set
Use one record per location or system. The CSV contains the same eight prompts plus fields for source revisions, observed evidence, the review owner, the decision, and closure references.
| Check | Sources to compare | Question to resolve |
|---|---|---|
| Parameter schedule | Engine-Generator Parameter Schedule article + drawings or specification | Is there a parameter schedule for each generator type, filled in rather than left as bracketed choices? |
| Rating and application | Parameter schedule + Power Ratings article + one-line and load summary | Do the rating and its application (emergency, standby, or prime) match the one-line, the load summary, and the transfer switches? |
| Fuel storage and day tank | Fuel System and Day Tank articles + fuel piping drawings + civil plans | Are the main tank, day tank, fill, and fuel piping drawn where the specification places them, with capacities stated in one place? |
| Exhaust and air intake | Exhaust System and Air Intake Equipment articles + mechanical plans | Is the exhaust route drawn to a safe discharge and the combustion and cooling air path drawn for an indoor set? |
| Cooling system | Cooling System article + mechanical plans | Does the radiator or heat exchanger type match the room arrangement and the mechanical drawings? |
| Enclosure and sound | Engine-Generator Set Enclosure and Sound Limitations articles + site plan | For an outdoor set, does the enclosure type and any sound requirement agree with the site plan and the project’s noise criteria? |
| Parallel operation | Parallel Operation and Load Sharing articles + one-line | If the specification retains paralleling, does the one-line show the paralleling gear and multiple sets? |
| Mounting, vibration, and seismic | Vibration Isolation and Seismic Requirements articles + structural details | Are the pad, isolators, and anchorage drawn consistent with the requirements the section retains? |
Worked example: a prime-rated schedule on a standby one-line
Illustrative example: the parameter schedule in the specification lists a prime rating for the generator, while the one-line and load summary describe a standby set serving emergency and optional standby loads. The mechanical drawings show a day tank but no main fuel storage, and the specification retains the integral main fuel tank article.
Ask the electrical engineer to confirm the rating and application, then correct the parameter schedule or the one-line, and coordinate the fuel storage arrangement between the specification and the mechanical drawings. Recheck the transfer switch schedule for the same assumptions before closing the item.
Avoid a false conflict
Generator specifications carry many bracketed options. An option left in the issued section is a requirement, so a parameter schedule that still shows choices is itself a finding.
When requirements disagree, follow the project’s document-control and clarification process. Do not assume that drawings always override specifications, or the reverse. Identify the exact sources and request an authorized decision.
Close the issue across the affected documents
Record the location or tag, drawing and specification references, issue dates, observed difference, and the decision needed. Assign an owner and keep the item open until the response identifies the governing requirement. Check the revised drawings and specification references together; a response email alone may leave the issued package inconsistent.
For the overall process, use the guide to drawing and specification conflicts. Mark an inapplicable checklist row with a reason, and distinguish a verified correction from a question that still needs design information.
Where Groundbook fits
Groundbook’s drawing and specification review helps investigate potential disagreements in the documents you supply. Include the relevant specification sections and drawing references, then verify the cited evidence with the responsible reviewers before acting on a finding.