Every mechanical and plumbing system we coordinate is governed by a specific code. Our team works to IMC for mechanical, IPC and UPC for plumbing, ASHRAE 90.1 for energy compliance, SMACNA for ductwork fabrication, and NFPA 99 for medical gas — so coordination decisions are grounded in what the code actually requires, not what looks reasonable in the model.
Coordinated to IMC · ASHRAE · SMACNA · ASME B31
Duct routing for supply, return, and exhaust — rectangular, round, and oval profiles — coordinated with structural, piping, and architectural ceilings. We model duct to installation tolerance, not clearance tolerance, and flag every location where SMACNA gauge or velocity requirements affect routing decisions.
Chilled water supply and return piping from chiller plant to AHU coil connections. We coordinate pipe sizing per system pressure drop, insulation envelope, and hanger clearances — and model valve packages, strainers, and balancing stations as discrete geometry that fabrication can use directly.
Hot water heating distribution — boiler headers, zone piping, terminal unit connections, and expansion tank tie-ins. We model expansion loops, anchor points, and pipe penetrations through fire-rated assemblies at coordination stage so structural and fire protection contractors can respond before steel is in place.
Variable refrigerant flow systems — outdoor unit placement, refrigerant piping headers, branch selectors, and indoor unit connections. We model pipe length equivalency constraints and elevation change limits against manufacturer data to prevent system capacity loss before installation begins.
Toilet exhaust, kitchen exhaust, laboratory fume hood exhaust, and general exhaust systems — coordinated through ceiling plenums and routed to exterior discharge. We track minimum separation from intake to exhaust termination per ASHRAE 62.1 and flag code conflicts before they become sheet metal rework.
Refrigerant liquid and suction lines for split systems, chillers, and condensing units — routed through mechanical rooms, risers, and above-ceiling spaces. We model to ASME B31.5 joint spacing, oil trap requirements, and seismic bracing intervals so the refrigeration contractor can pull permits from the model geometry.
Coordinated to IPC · UPC · ASPE · NFPA 99
Cold water supply and hot water recirculation — from meter to fixture rough-in. We model to IPC fixture unit counts, velocity limits, and pressure zone requirements. Water heater connections, recirculation pump tie-ins, and backflow preventer assemblies are modeled as complete spool geometry, not simplified centerlines.
Sanitary waste and vent systems from fixture connections through horizontal mains to the building drain. Slope is enforced in model geometry — not noted on drawings and assumed in the field. We track developed length to vent stacks, wet vent applicability, and air admittance valve placement restrictions per IPC chapter by chapter.
Roof drain leaders, secondary overflow drains, and below-grade storm connections. We model storm drainage at required slopes, coordinate leader locations with architectural roofing details, and verify that primary and secondary drain outlet invert elevations comply with IPC overflow requirements before the roof deck is placed.
Oxygen, medical air, nitrous oxide, vacuum, and WAGD piping for healthcare and laboratory environments. NFPA 99 governs zone valve locations, alarm panel tie-ins, source equipment clearances, and labeling requirements — all modeled as coordination geometry so the piping contractor can sequence installation around structural and interior finish milestones.
Kitchen grease waste piping from floor sinks, floor drains, and fixture connections to grease interceptors — with correct slope enforcement and venting to prevent siphonage. We model interceptor access clearances, cleanout locations, and maintenance access paths so the grease trap can actually be serviced after the restaurant opens.
Condensate drain lines from air handling units, fan coil units, VAV boxes, and VRF indoor units — routed to drain points without creating trap-to-trap conditions or negative pressure reversals. IMC §307 mandates secondary overflow provisions and we coordinate those drain pan outlets against ceiling system clearances before ductwork is installed.