Which drawing is the dimensional source?
Use the selected model's approved equipment outline and mounting information. Record whether the mounting location applies to the skid, isolator or another specified interface. Do not substitute a generic enclosure outline for the actual equipment mounting drawing.
Cummins T-030, Issue 9 dated February 2015, explains that equipment mounting configurations vary and directs readers to the specific model's installation information for mounting dimensions. The dated application manual supports this source distinction; current selected-model evidence is still required.
Genset Enclosures is independent and is not affiliated with Cummins. This is a drawing coordination worksheet, not foundation design or anchor selection. Engineering sign-off is performed only by the registered engineer on the job.
Sources: Cummins Power Generation: T-030 application manual, Issue 9, February 2015
Which datum fields should be compared?
Review the vendor outline, foundation drawing and enclosure GA together. Keep each drawing's reference system visible before considering any approved transformation.
| Field | Source evidence | Question |
|---|---|---|
| Equipment selection | Model and approved vendor drawing revision | Does the source describe the selected assembly? |
| Mounting interface | Skid, isolator or other identified connection | Which holes or points are being coordinated? |
| Origin | Named reference point on each drawing | Are dimensions measured from the same point? |
| Axis direction | Positive directions and viewing orientation | Has the reference been mirrored or rotated? |
| Units | Explicit units on each source | Is conversion documented where required? |
| Mounting locations | Dimension references, not scaled measurements | Do the approved coordinates trace to the source? |
| Change disposition | Designer response and revised drawing references | Are all affected disciplines aligned? |
How can matching spacing still be wrong?
Illustrative example. A fictional vendor outline measures mounting points from the radiator-end datum. The foundation drawing uses an origin at the opposite end but copies the vendor offsets without an approved coordinate mapping. The relative spacing can look consistent while the point locations are referenced from the wrong end.
Record both origin descriptions and the affected dimension references. Ask the responsible designer for the approved mapping and orientation. Do not correct the problem by scaling a PDF, assuming a mirror operation or shifting anchors from an unapproved sketch.
After the response, compare the revised locations with the selected assembly and enclosure interfaces. Keep any isolator mounting distinction explicit. A skid hole and an isolator foundation point need not represent the same connection.
What should happen before the drawing issue?
Confirm the vendor revision used in the coordination remains current for the selected equipment. A substituted generator or isolation arrangement can change the interface even when the enclosure envelope looks unchanged. Reopen the affected datum and mounting checks.
Retain the approved mapping, drawing revisions and unresolved queries in the issue pack. Structural loads, foundation adequacy, anchor type, embedment and installation tolerances require their own authorised design evidence. No dimensions or anchor sizes are supplied by this worksheet.
Use the review to expose a missing input before the drawings are issued. A completed table records a reviewed evidence chain; it does not certify a foundation or permit site modification.
Common questions
What else should the bid team know?
Does matching hole spacing prove the locations agree?
No. Origin, orientation, units and the mounting interface must also agree.
Can mounting locations be scaled from a PDF?
Use the approved dimensional source and seek clarification where it is incomplete.
Does this worksheet select anchors or design the foundation?
No. Those decisions remain with the responsible authorised designers.
Primary sources
- T-030 application manual, Issue 9, February 2015Cummins Power Generation