Commercial Gym Case Study: $610K and 2.5 Weeks Saved on a Fitness Build

The project: a new commercial fitness facility for a regional operator

The client is a regional gym operator building a new ground-up fitness facility - a large open training floor, group-exercise and spin studios, locker rooms, and a long bank of cardio equipment along the window line. We have anonymized the operator and exact location at the client's request; the issue categories and outcomes below are reported as they occurred.

A gym is deceptively risky to coordinate. It puts heavy rooftop HVAC units on long-span open-web steel joists, carries an assembly occupancy that tightens egress and fixture counts, and draws a large electrical load from cardio equipment, mechanical systems, and lighting - all in a building whose simple appearance invites a lighter review than it deserves.

Finding 1: rooftop units landing on joists with no reinforcement shown

The highest-impact finding was a set of heavy rooftop HVAC units positioned over long-span open-web steel joists where the structural drawings showed no added reinforcement for the concentrated loads. The mechanical roof plan located the units; the structural framing plan never picked up the point loads at those locations - a conflict invisible on either sheet alone but obvious when the disciplines are cross-checked.

Discovered in the field, this is an expensive correction: reinforcing or re-spanning joists after the roof is framed means stopping work, engineering a fix, and waiting on steel. Resolving it at design - adding joist reinforcement or relocating units before fabrication - eliminated the rework. Cross-discipline conflicts like this are exactly what AI review is strongest at; see our MEP coordination best practices.

Finding 2: egress and exits that did not match the assembly occupant load

Helonic flagged an egress configuration that did not clearly satisfy the building's assembly (A-3) occupant load. A fitness facility packed with people is an assembly occupancy, which raises the occupant load and tightens exit width, exit count, and restroom-fixture requirements compared with a business occupancy - and the drawing set leaned toward the lighter assumption.

Caught in plan check or, worse, at inspection, an exit-count or restroom shortfall forces late redesign of walls, doors, and plumbing after they are built. Correcting the occupancy assumptions on paper kept the exits and fixtures right the first time. This is the same class of issue our AI plan review guide describes for occupancy-driven code checks.

Finding 3: an electrical service undersized against the equipment schedule

The third finding was an electrical service size on the drawings that did not support the connected load implied by the equipment schedule - the combined demand of cardio equipment, rooftop HVAC, and lighting exceeded what the drawn service and feeders could carry. An undersized service discovered late means re-pulling feeders, upsizing gear, and, in the worst case, a new utility coordination cycle.

Reconciling the service size against the load on paper, before gear was ordered and conduit was run, removed the risk entirely. For how these electrical mismatches hide in the set, see our electrical coordination tips.

The outcome: three field problems resolved on paper

Together the findings represented an estimated $610,000 in avoided rework and change orders plus about 2.5 weeks of avoided schedule slip. The figures are the team's estimates of in-field cost and delay had each issue propagated to construction, rounded for anonymization. For how time and cost compound when these issues reach the field, see our construction rework costs analysis.

How Helonic Helps

Helonic's AI reads the 2D construction documents and cross-checks architectural, structural, mechanical, and electrical sheets simultaneously - exactly the comparison that surfaces rooftop units over unreinforced joists, an egress count that does not match the occupancy, or a service undersized against the equipment schedule. On commercial buildings whose simple shell hides heavy, code-driven systems, finding those conflicts before construction is what protects the budget and the schedule. See how AI review compares to manual review.

Commercial Gym Case Study FAQ