12 floors, two risers, one coordinated package.

Client type

A US commercial building team delivering a 12-floor CBD office tower. The client’s electrical engineers owned the design and code review, and worked alongside architectural and structural teams in a shared BIM 360 coordination process. The client is not named because the work was delivered under NDA.

Scope

• Main and emergency electrical riser diagrams for the tower.
• Per-floor distribution and lighting panel schedules.
• UPS integration and rooftop generator coordination.
• BIM 360 coordination support with the architectural and structural teams.
• Inputs for the NFPA 70E arc flash documentation.

Constraints

The project had already entered cross-discipline BIM coordination when the electrical team hit a documentation bottleneck. Architectural and structural changes had moved shafts and equipment rooms, while emergency power assumptions were still being resolved. The internal team could either slow coordination to rebuild the electrical package, or keep coordination moving and risk a drawing set that no longer matched the model.

Advanced Mechanix was brought in to produce the riser and panel package while the client’s engineers kept ownership of design decisions and code review.

Standards

Design decisions and code review stayed with the client’s engineers throughout; our role was production to their standard. The package was built to support the project’s NFPA 70E arc flash documentation, with UPS, generator and life-safety loads separated clearly in the riser hierarchy so emergency and normal power could be reviewed on their own. Naming, feeder references and loads were normalised so every sheet used the same conventions.

Deliverables

• Main and emergency risers rebuilt from the latest model exports and equipment schedules.
• Per-floor panel schedules normalised so naming, feeder references and loads matched across sheets.
• A riser hierarchy that separates UPS, generator and life-safety loads.
• Explicit redline logs for each coordination round, instead of informal mark-up drift.
• Editable source files, PDF issue sets and a clean reference structure for the final NFPA 70E and construction documentation — 24 drawings in total.

Timeline

The package went through three coordination (clash) rounds in BIM 360 alongside the architectural and structural models. Each round was processed against a redline log, so the client could see what had changed between rounds without re-reviewing the whole set. Production ran in parallel with the client’s own design work, so the electrical engineering team did not have to pause other projects.

Outcome

The package moved through coordination without forcing the electrical engineering team to pause other design work. The client received editable source files, PDF issue sets and a clean reference structure for final NFPA 70E and construction documentation.

Why it worked

The engagement stayed useful because drafting production and engineering decisions were separated. Our team absorbed the documentation volume; the client’s engineers retained the decisions that required local judgement. That division kept the schedule tight without turning drafting into uncontrolled outsourcing.