Party Barn MEP Plan

Service configuration — trunk feed vs. independent transformer

The master-plan utility drawing shows a new transformer feeding Building A and Building B on split 200A independent panels (two separate utility services). This MEP assumes that, but confirm with the electrician and utility before ordering service equipment. Changes service-entrance materials; does not change Panel A or B branch circuits.

→ Electrician + utility — before service equipment order

Panel A slot count — 42-space may not be enough, recount before ordering

Circuit numbering has drifted (A21b, A21c, A39–A46). Every 240V/2-pole breaker consumes 2 slots: double oven (50A/2P), outdoor appliance (30A/2P), compressor (30A/2P), welder (50A/2P), water heater (30A/2P), UTV charger (50A/2P), mini-split (20A/2P), plus fireplace and outdoor chimney circuits. That's 14+ panel slots from 2-pole breakers alone, before single-pole circuits. A 60-space can may be needed. Have the electrician do a formal slot count before Panel A equipment is ordered.

→ Electrician — before panel equipment order

Double oven — 30A or 50A? And is there also a separate cooktop?

A21b is slotted at 50A/240V for headroom, but final breaker size depends on the unit. Most residential double ovens are 30A; commercial-grade units often require 50A. Separately: the zone table says 'range/oven' and the panel schedule says 'double oven.' A double wall oven has no cooktop. If there's also a range top, that's a separate dedicated 240V circuit not currently in Panel A. Decide: double wall oven only, or double oven + separate cooktop?

→ Appliance selection — before Panel A final schedule

AHJ + commercial kitchen code — NFPA 96, health dept, grease interceptor

A full fridge + double oven + 400 CFM grease hood is real cooking. Depending on jurisdiction and event/catering use, this may require: NFPA 96 fire suppression (Ansul system) over the hood, a grease interceptor on the kitchen sink and dishwasher drains (not just the wash-down bay floor drain), and a health department permit for event catering. This is an AHJ and health department conversation before kitchen scope is priced.

→ AHJ + health department — before kitchen scope is finalized

Occupancy classification — shop + event venue, AHJ ruling needed

A building that functions as equipment storage by day and an event venue by night may trigger different occupancy classification at use. This affects emergency lighting extent (main floor + Roost, not just the stairwell), exit signage requirements, occupant load calculation, and door hardware. Confirm with AHJ before electrical rough-in — egress lighting is locked in early.

→ AHJ — before electrical rough-in

Golf cart charger voltage

Plan assumes standard 120V on-board chargers (quad receptacles, A29–A32). If any carts need 240V fast-charge, circuits need to be upgraded. Confirm cart fleet spec.

→ Cart spec — low cost to change now, expensive after rough-in

Outdoor kitchen final location between A & B

Outdoor kitchen supply/drain lines need to be trenched alongside the main site utilities. The exact location between Building A and Building B needs to be locked on plan before Caldwell mobilizes for trenching — moving it after the trench is cut is expensive.

→ Caldwell trenching mobilization — lock before trench

Floor drain + grease interceptor — wash-down bay AND kitchen sink/dishwasher

Given the cooking equipment now in scope, the AHJ conversation needs to cover two things: (1) whether a floor drain/interceptor is required in the wash-down bay, and (2) whether a grease interceptor is required on the kitchen sink and dishwasher drain — standard for commercial-adjacent kitchens. Ask both in the same AHJ meeting. A grease interceptor on the kitchen drain is also tied to the NFPA 96 / commercial kitchen question (E4).

→ AHJ — before slab pour + before kitchen scope is finalized

Bar equipment list — kegerator, ice maker, etc.

B11 is sized for bar equipment, but the actual load and icemaker line size depends on what's going in the bar. Kegerator, undercounter ice maker, blender station? Each has different electrical and plumbing requirements. Lock the bar spec before Roost rough-in.

→ Bar design — before Roost rough-in

Burial method — conduit vs. direct-burial, PEX vs. poly

Conduit protects wire and allows future pulls but costs more to install. Direct-burial is cheaper but permanent. Same tradeoff for PEX vs. poly on the water lateral. AHJ may have a preference. Confirm before Caldwell trenches.

→ Caldwell trenching — confirm before mobilization

Mini-split tonnage/models — all 3 zones

Sizes in this plan (18K BTU main floor, 36K BTU Roost zone 1, 36K BTU Roost zone 2) are estimates. An HVAC sub needs to run a Manual J heat load calc for the actual building at 8,040 ft before ordering equipment. Cold-climate-rated models are non-negotiable at this elevation.

→ HVAC sub — before equipment order; lead times can be 6–10 weeks

Shop ventilation — passive or powered?

Passive gable/ridge vents may be sufficient for general shop use. If the AHJ requires mechanical ventilation for compressor and welding fumes, a powered wall exhaust fan gets added to the scope. Ask AHJ before finalizing the mechanical scope.

→ AHJ ruling — low cost to add during framing, harder after

Mechanical chase — exact dimensions and location on plan

The chase is framed adjacent to bathrooms per this plan. Exact width, depth, and position need to appear on Eric's CDs before framing so the flat-pack fabrication accounts for it. This is a framing decision, not a finish decision.

→ Eric's CDs — before flat-pack fabrication (Huron Components)

Make-up air — 400 CFM hood likely triggers requirement

IMC 504.5 / IRC M1503.6 require mechanical make-up air when exhaust exceeds 400 CFM in most jurisdictions. Nothing in the current mechanical scope addresses make-up air. If required: dedicated make-up air duct, motorized damper, and possibly a tempering unit to pre-condition incoming air at 8,040 ft. Not a minor add — confirm with AHJ before mechanical scope is bid.

→ AHJ confirmation — before mechanical bid

Chimney 1 — one flue / two fireboxes: get engineer sign-off before fabrication

Described as one flue serving two fireboxes on two different floors. Solid-fuel fireplaces typically each require their own dedicated flue. The code-compliant version of a 'two-floor fire' is a see-through fireplace (one firebox, two openings at the same level). Two stacked fireboxes on separate floors sharing one flue is a different thing and needs mason/engineer confirmation. Cannot be corrected after flat-pack framing is erected.

→ Mason / mechanical engineer — before Huron fabricates flat-pack

Chimney 2 + outdoor kitchen hood — undocumented third structure needed

Both the outdoor kitchen grease hood duct and Chimney 2 require a roof to terminate through. Buildings A and B have no shared roof. There is no documented structure covering the outdoor A/B shared space. This appears to require a third structure — breezeway, pavilion, or covered outdoor room. That structure needs its own design, CDs, and foundation poured in Caldwell's site mobilization. This is a design gap, not a detail — it gates trenching.

→ Design + Eric's CDs — before Caldwell trenches

Welder amperage

A26 is slotted at 50A/240V (NEMA 6-50R). If you plan to run a smaller welder, 30A is sufficient and cheaper. If a plasma cutter or large MIG is planned, 50A is right. Pick your welder.

→ Low cost — just confirm before Panel A final schedule

Lumen Cache design meeting — schedule before framing, add universal rough-in fallback

All lighting fixture selection, dimming topology, security zones, camera locations, AV racks, control wiring, WAP placement, and access control is pending the Lumen Cache design session. If their design lags behind framing, add a universal rough-in standard to the framing spec now: extra empty conduit + pull string in all wall cavities and the chase. This is standard practice on CI-forward builds and prevents walls from being reopened later.

→ Schedule Lumen Cache meeting — before electrical rough-in. Add universal rough-in to framing spec regardless.