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14 case studies
Case studies
Drawing extract · redacted
254-unit affordable tower, drawn from the underground up
Underground, penetration, deck and apartment drawings for a 254-unit, ~274,000 sf tower — apartment layouts carried through eleven revision rounds in a month.
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Drawing extract · redacted
254-unit affordable tower, drawn from the underground up
Underground, penetration, deck and apartment drawings for a 254-unit, ~274,000 sf tower — apartment layouts carried through eleven revision rounds in a month.
Read the case studyChallengeAn electrical contractor building a new affordable-housing tower in New York — 254 income-restricted units from studios to four-bedrooms, with retail and a community facility over a cellar, rising about 26 levels and roughly 274,000 sf — needed field-ready drawings faster than its own office could produce them: underground conduit that had to be set before the slab was poured, sleeves through every floor, and a repeatable electrical layout for each apartment type, accessible units included.
ApproachWorking in AutoCAD to the contractor’s own title block and standards, we dimensioned every underground conduit from both the column centers and the grid lines, drew the slab-penetration sheets, and produced deck drawings for the cellar, first and second floors, colour-coded by system — normal and emergency lighting, equipment power, receptacles and fire alarm. For the apartments we drew device layouts with 100A unit panel schedules for every unit type, from studio to four-bedroom.
OutcomeThe underground set went through four submissions and was issued for record. The apartment layouts absorbed eleven rounds of client mark-ups in about a month, and the second-floor deck was reissued against the architect’s bulletin background — every sheet delivered as the contractor’s own submittal.
Drawing extract · redacted
16-storey tower over two parking sub-cellars, deck by deck
Sub-cellar-to-bulkhead electrical deck and overhead drawings for a 16-storey Type I-B tower — returned “Approved as Noted” by the project’s engineer.
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Drawing extract · redacted
16-storey tower over two parking sub-cellars, deck by deck
Sub-cellar-to-bulkhead electrical deck and overhead drawings for a 16-storey Type I-B tower — returned “Approved as Noted” by the project’s engineer.
Read the case studyChallengeA 16-storey, Type I-B residential tower in New York sits on two levels of parking sub-cellars, with community-facility space at its base. For the electrical contractor, every conduit stub-up and stub-down had to be located before each slab pour, clear of the HVAC ductwork, and coordinated across lighting, emergency lighting, apartment feeders, fire alarm, CCTV and card readers.
ApproachWe drew the sub-cellar overhead conduit plan that consolidated the MEP trades, then deck drawings from the sub-cellars through the typical floors to the roof and bulkhead — each floor split into separate system plots (lighting, apartment feeders, fire alarm, CCTV and card reader, plus a combined sheet) — and dimensioned the runs against the HVAC sheet-metal layouts for floors 2 through 16. Architectural bulletins came in as revised backgrounds and were carried through.
OutcomeThe second-floor overhead drawings were reviewed by the project’s engineer and returned “Approved as Noted”. The first sub-cellar deck went through six revisions as the design moved, and the typical floors were reissued against the fourth architectural bulletin.
Drawing extract · redacted
12-storey mixed-use building: feeders checked before the wire was bought
A feeder-by-feeder voltage-drop review of about 65 feeders, with a consolidated riser and deck drawings, for a 12-storey mixed-use building.
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Drawing extract · redacted
12-storey mixed-use building: feeders checked before the wire was bought
A feeder-by-feeder voltage-drop review of about 65 feeders, with a consolidated riser and deck drawings, for a 12-storey mixed-use building.
Read the case studyChallengeA 12-storey mixed-use building in New York — retail at grade over a cellar, apartments above, the roof about 119 feet up — is fed by long runs from the main distribution to panels throughout the building. Before ordering cable, the electrical contractor wanted the feeder sizes checked against the real run lengths, alongside the usual drawings.
ApproachWe built a voltage-drop schedule covering about 65 feeders, comparing each conductor size shown with the size its run length actually requires, and drew a consolidated electrical riser, first-floor overhead and deck drawings, second-floor deck drawings and the panel and floor penetration sheets.
OutcomeA schedule the contractor could price and order from — the feeders that needed resizing identified set by set before any cable was bought — issued with the riser and deck drawings on the contractor’s title block.
Drawing extract · redacted
13-storey residential building with a Pre-K at its base
Overhead, penetration and deck drawings for a 13-storey residential building, plus the Pre-K’s overhead and telecom-room layout — overhead set “Approved as Noted”.
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Drawing extract · redacted
13-storey residential building with a Pre-K at its base
Overhead, penetration and deck drawings for a 13-storey residential building, plus the Pre-K’s overhead and telecom-room layout — overhead set “Approved as Noted”.
Read the case studyChallengeA 13-storey residential building in New York over two parking sub-cellars, with a Pre-K occupying part of the basement and first floor. The electrical contractor needed conduit coordinated through the typical residential floors, and a small educational space fitted out with its own telecom room.
ApproachWe drew the floor-penetration sheets for floors 4 to 9; the overhead conduit layout for floors 3 to 9, with every unit type, light fixture and junction box located against the architecture; the 12th-floor deck drawings; and for the Pre-K, a first-floor overhead drawing plus a telecom (MDF) room layout in plan and elevation, locating the low-voltage risers and access-control equipment.
OutcomeThe floors 3–9 overhead drawings were reviewed by the project’s engineer and returned “Approved as Noted”. The 12th-floor deck went through three revisions, and the Pre-K overhead was reissued a year after its first submission as the design evolved.
Drawing extract · redacted
Generator-yard stair foundations at a hyperscale data centre
Foundation plan, sections, rebar schedule and anchor details for a combined footing on four piers — the set the stair fabricator built its shop drawings against.
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Drawing extract · redacted
Generator-yard stair foundations at a hyperscale data centre
Foundation plan, sections, rebar schedule and anchor details for a combined footing on four piers — the set the stair fabricator built its shop drawings against.
Read the case studyChallengeA new access stair into an operating generator yard at a hyperscale data centre in Virginia had to land in the gap between an existing transformer, grating walkways, steel columns and an underground power-distribution duct bank — with no room to move any of them and no interruption to the yard.
ApproachWe field-verified the clearances, then sized a combined reinforced-concrete footing on four piers — 13′-3″ × 10′-7″ × 18″ at 4,500 psi, founded below the 24-inch frost depth — checking self-weight and bearing pressure to IBC 2021, the Virginia Construction Code, ACI 318-19 and ASCE 7-16. The foundation plan, sections, pier and anchor / base-plate details, rebar schedule and pouring sequence were all issued from one Revit model.
OutcomeThe foundation package the stair fabricator built its shop drawings against, sealed by the project’s own Virginia engineer of record. Every clearance on the plan matches what was measured on site, so the stair landed first time.
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ISO 8 cleanroom inside a working warehouse
A 12-sheet coordinated M&E permit set with 41% documented spare capacity — no service upgrade needed.
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Drawing extract · redacted
ISO 8 cleanroom inside a working warehouse
A 12-sheet coordinated M&E permit set with 41% documented spare capacity — no service upgrade needed.
Read the case studyChallengeA manufacturing tenant needed an ISO 8 cleanroom built inside an operating California warehouse — without a new electrical service, and with the adjacent office left untouched. The mechanical problem was delivering HEPA-filtered air at a controlled rate through a 39-unit ceiling; the electrical problem was powering that array, its controls, cleanroom lighting and a bench of process equipment from the building’s existing 480/277V service.
ApproachWe ducted three new rooftop heat pumps directly into the fan-filter ceiling, each unit set to a fixed airflow so cooling, filtration and balance work as one system. Electrically, we kept the existing service and added a single step-down transformer and a process sub-panel, assigning every unit and luminaire to a tagged circuit, with 2022 Title 24 compliance documented.
OutcomeA 12-sheet coordinated mechanical and electrical permit set, the load calculation showing 41% spare capacity on the reused panel — proof the no-service-upgrade decision was engineered, not hoped for. First-round city comments were answered and resubmitted.
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Five-building storage campus, designed as five buildings
A 34-sheet M/E/P set across five buildings, every energy certificate passing — interior lighting up to 56% under allowance.
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Drawing extract · redacted
Five-building storage campus, designed as five buildings
A 34-sheet M/E/P set across five buildings, every energy certificate passing — interior lighting up to 56% under allowance.
Read the case studyChallengeFive new buildings on one Colorado site — twenty individually owned storage units, a two-level sales-and-repair building and a car wash — each needing its own systems and 2021 IECC energy documentation. A single blended design would not permit cleanly; the AHJ reviews and inspects each building on its own.
ApproachWe designed each building as a self-contained package and the campus as the sum of them: a repeatable per-unit module — split heat pump, point-of-use water heater, full fixture group — across all twenty units, with per-building load calculations driving the services, and six energy certificates covering the five buildings plus campus exterior lighting.
OutcomeA 34-sheet coordinated M/E/P set carried through five revision rounds, every certificate passing — interior lighting 43–56% below the power allowance, exterior 98% below — with the load-calc tables printed on the drawings so the reviewer checks the math instead of requesting it.
Drawing extract · redacted
Detention facility on a vacuum waste system
A 23-sheet mechanical and 28-sheet plumbing set; right-sizing cut the kitchen system from 200 tons to 73.
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Drawing extract · redacted
Detention facility on a vacuum waste system
A 23-sheet mechanical and 28-sheet plumbing set; right-sizing cut the kitchen system from 200 tons to 73.
Read the case studyChallengeA secure tenant improvement in Maryland across housing pods, two commercial kitchens, a laundry and medical zones — compounding the usual problems: near-100% outdoor air in sealed high-occupancy housing, a vacuum waste system that conventional drainage details do not fit, and kitchen loads large enough to swing the make-up air design threefold.
ApproachWe built a 35-system load model and refined it against the real equipment cut sheets through a documented QC review. Plumbing was designed around the vacuum sewer: detention-grade vacuum fixtures in the cells, hot water sized two ways as a cross-check, and point-of-use grease interceptors discharging to sized vacuum collection sumps.
OutcomeA coordinated 23-sheet mechanical and 28-sheet plumbing set. Refining against nameplate data cut the kitchen system from 200 tons to 73 and the laundry from 112 to 14 — right-sized systems backed by load reports the design team can hand to a reviewer, with the calculation basis printed on the sheets.
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Auto dealership renovation with EV charging pre-engineered
263,866 VA of demand held on the existing 1200A service — with DC fast-charging pre-engineered as a purchase, not a redesign.
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Drawing extract · redacted
Auto dealership renovation with EV charging pre-engineered
263,866 VA of demand held on the existing 1200A service — with DC fast-charging pre-engineered as a purchase, not a redesign.
Read the case studyChallengeAn operating Georgia dealership wanted a renovation layering real new load onto an existing building — a customer cafe, charging lounges, co-op spaces, an automated inspection lane, and a stated intent to add DC fast charging later — all on an existing 1200A service the owner did not want to upgrade, inside a third-party architect’s package that kept moving.
ApproachWe itemized every new and existing load in a demand calculation published on the riser sheet, reused the existing panels, and added one new panel for the renovation loads. Future EV charging was solved as a documented provision — a step-up transformer and a 480V panel sized for three 50 kW chargers — and dedicated outside-air units handle ventilation.
OutcomeThe calculation closed the question: 263,866 VA of demand — 781.5A on the 1200A main — with the EV path pre-engineered at 480V so chargers become an equipment purchase, not a redesign. The 25-sheet three-discipline set tracked the architect’s package through twenty revision cycles.
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Retail shell to A-2 assembly, sized to the people
An 11-sheet MEP package sizing every system to a re-set 261-occupant load, carried through nine revisions.
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Drawing extract · redacted
Retail shell to A-2 assembly, sized to the people
An 11-sheet MEP package sizing every system to a re-set 261-occupant load, carried through nine revisions.
Read the case studyChallengeConverting a 6,240 sf retail shell to an A-2 bar and golf-simulator lounge re-set the occupant load to 261 — and with it every MEP requirement. The existing shell had one restroom, no assembly-grade ventilation or electrical capacity, and the occupancy change triggered a fire-sprinkler requirement that had to be routed without stalling the MEP permit.
ApproachWe sized everything to the people, not the floor area: 2,000 CFM of outside air through a single packaged unit against code ventilation rates, two new restroom groups with a recirculated hot-water loop, and a load calc totaling 109.4 kVA that set the 400A three-phase service. Title 24 forms went into the same set; the sprinkler scope was flagged on the cover for the fire department’s separate permit.
OutcomeAn 11-sheet MEP package inside the 16-sheet TI set, carried through nine revisions — with the ventilation, service-sizing and fixture calculations documented on the sheets so reviewers could check the math instead of writing comments about it.
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Coastal custom home: radiant heat, ductless cooling, in-house sprinklers
A 25-sheet MEP set plus a hydraulically calculated NFPA 13D sprinkler set, every schedule populated by make and model.
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Drawing extract · redacted
Coastal custom home: radiant heat, ductless cooling, in-house sprinklers
A 25-sheet MEP set plus a hydraulically calculated NFPA 13D sprinkler set, every schedule populated by make and model.
Read the case studyChallengeAn addition and whole-house remodel on the California coast paired an existing structure with new construction behind an envelope glazed over half its floor area. The program called for radiant-floor comfort, cooling without tearing duct chases through the existing house, EV charging on a service of unknown spare capacity, and a residential sprinkler system — all against a Title 24 model and an evolving architectural background.
ApproachWe started with an ACCA Manual J/S/D run so every system was sized to the actual coastal loads. Heating became two radiant zones off one sealed-combustion appliance; cooling went to four ductless heat pumps. The service was proven by a documented load calculation, water piping sized by fixture units, and the NFPA 13D sprinkler set designed in-house alongside the MEP so the trades never collide.
OutcomeA 25-sheet coordinated MEP set plus a separate hydraulically calculated NFPA 13D sprinkler set, every schedule populated by make and model. The hydronic schematic and tabulated loop lengths pre-empt the comments reviewers raise most often on residential hydronics.
Drawing extract · redacted
Three-story self-storage, built to a national prototype
Signed COMcheck certificates with lighting 24% under allowance; ten tracked revisions held the set to the operator’s prototype.
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Drawing extract · redacted
Three-story self-storage, built to a national prototype
Signed COMcheck certificates with lighting 24% under allowance; ten tracked revisions held the set to the operator’s prototype.
Read the case studyChallengeA national self-storage operator was adding a three-story climate-controlled building (~85,400 gsf) to a Texas site and required the MEP package to match its prototype standards exactly — per-floor electrical rooms, specific fixture packages, unpowered drive-up units — while clearing the 2021 IECC for a building type that is mostly unoccupied aisle space.
ApproachWe designed a 600A service with an identical distribution stack on each floor and lit the aisles with LED industrials on per-aisle occupancy sensors. Thirteen split heat pumps with economizers, unit heaters and a 10,000 CFM exhaust fan condition and ventilate the building; restroom plumbing rides compact risers through all three floors.
OutcomeSigned COMcheck certificates documented compliance under the 2021 IECC — interior lighting 24% under allowance, exterior 66% under, envelope 7% better than code. Ten tracked electrical revisions answered every operator review comment in writing, keeping the set aligned with the prototype.
Drawing extract · redacted
Desert custom home with radiant slab and split cooling
Whole-house cooling at 45,921 Btuh — under 4 tons for 5,018 sf — with a 61-page ACCA load report.
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Drawing extract · redacted
Desert custom home with radiant slab and split cooling
Whole-house cooling at 45,921 Btuh — under 4 tons for 5,018 sf — with a 61-page ACCA load report.
Read the case studyChallengeA single-story desert custom home with vaulted ceilings, a long covered porch and a slab the owner wanted heated — at a 115°F outdoor design temperature. A single ducted system would fight the vaults in both seasons, so the house needed heating and cooling decoupled, and every piece of equipment justified by a real load number before the sheets were drawn.
ApproachWe ran a room-by-room Manual J/S/D against desert design conditions, then split the systems: a hydronic radiant slab (26 loops, two gas heaters) for heat, and three cooling zones — a ducted system for the living wing, a dedicated heat pump for the vaulted garage/shop, and a multi-zone unit serving the bedroom wing. Electrical and plumbing were coordinated to the same plan.
OutcomeWhole-house cooling came to 45,921 Btuh — just under 4 tons for 5,018 sf — verified per system in Manual S. The delivered package: 16 M/E/P sheets plus a 61-page ACCA-compliant load report, with a codes-analysis block matching the 2021 I-codes and 2020 NEC, ready for plan review.
Drawing extract · redacted
All-electric townhouse fourplex under one roof
A 28-sheet all-electric set clearing the 2021 IECC by 4.2% — no window upgrade, no gas, no ducts crossing a rated wall.
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Drawing extract · redacted
All-electric townhouse fourplex under one roof
A 28-sheet all-electric set clearing the 2021 IECC by 4.2% — no window upgrade, no gas, no ducts crossing a rated wall.
Read the case studyChallengeA four-unit, three-level townhouse building had to be heated, ventilated, wired and plumbed as four independent all-electric dwellings under one roof — with fire-rated party walls that punish every penetration, an envelope that missed the prescriptive window U-factor, and a modular-construction-friendly requirement to keep each unit’s systems inside its own box.
ApproachWe went near-ductless: room-by-room electric baseboard sized from the Manual J, one ERV per unit sized to ASHRAE 62.2, ventless dryers and recirculating hoods to eliminate exhaust penetrations, and a 600A service split into four unit panels using the multifamily demand calculation. The envelope went through REScheck as a UA trade-off rather than a prescriptive checklist.
OutcomeA coordinated 28-sheet MEP set issued through three revision cycles, with the Manual J report and REScheck certificate bound into the permit package. The building cleared the 2021 IECC at 4.2% better than code — no window upgrade, no gas infrastructure, and no ductwork crossing a rated assembly.
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