DD Set Plan Review: 45 Issues Found
An anonymized plan review of a design development set uncovered equipment schedule, utility loads, and MEP coordination issues before construction.
Enterprise & volume pricing
Key findings
Utility loads schedule lists different equipment models than spec
Mechanical
The utility loads / connection data schedule identifies different models (and in some cases manufacturers) than the supporting equipment spec for the same item numbers.
Equipment schedule and drawing tags out of sequence
Architectural
Equipment tags on plans do not align with schedule numbering; some items in the schedule have no plan reference.
Electrical loads for laundry equipment not coordinated with schedule
Electrical
Utility connection data shows electrical loads that do not match equipment cut sheets or spec; panel schedules may be undersized.
Gas and exhaust connection data vs. equipment spec
Mechanical
Gas connection and exhaust requirements in the utility schedule differ from equipment spec for several items.
Water and drain connection requirements not fully detailed
Plumbing
Utility loads schedule shows water/drain data for some equipment; plumbing riser diagram does not show all connections.
Ventilation and make-up air for equipment rooms
Mechanical
Equipment room ventilation and make-up air requirements are not fully coordinated with equipment schedules.
Panel schedule spare capacity for future equipment
Electrical
Panel schedules show limited spare capacity; future equipment or circuits may require panel upgrades.
Floor drain and waste routing for equipment
Plumbing
Floor drain and waste routing for equipment areas are not fully detailed on plumbing plans.
Control and sequence of operation for mechanical systems
Mechanical
Control narrative and sequence of operation are not fully aligned with equipment schedule and drawings.
Accessible route and clear floor space at equipment
Architectural
Clear floor space and accessible route to equipment for maintenance need verification per ADA.
Issue categories
More example findings
Utility loads schedule lists different equipment models than specMechanicalCritical
Summary: The utility loads / connection data schedule identifies different models (and in some cases manufacturers) than the supporting equipment spec for the same item numbers.
Why it matters: If the schedule is based on wrong equipment models, electrical loads, gas sizing, and water/drain connections may be designed incorrectly, leading to rework and commissioning failures.
Suggested next step: Confirm basis-of-design equipment models and revise utility loads schedule to match specified equipment.
RFI draft: Please confirm the correct equipment models for the utility loads schedule and revise to match the equipment specification.
Equipment schedule and drawing tags out of sequenceArchitecturalCritical
Summary: Equipment tags on plans do not align with schedule numbering; some items in the schedule have no plan reference.
Why it matters: Procurement and installation rely on consistent tagging; gaps cause coordination errors.
Suggested next step: Align plan tags with equipment schedule and fill sequence gaps.
RFI draft: Please align equipment tags on plans with the equipment schedule.
Electrical loads for laundry equipment not coordinated with scheduleElectricalCritical
Summary: Utility connection data shows electrical loads that do not match equipment cut sheets or spec; panel schedules may be undersized.
Why it matters: Undersized circuits can cause equipment failures and permit comments.
Suggested next step: Reconcile electrical loads between equipment spec, utility schedule, and panel schedules.
RFI draft: Please confirm electrical loads for equipment match the utility schedule and panel design.
Gas and exhaust connection data vs. equipment specMechanicalHigh
Summary: Gas connection and exhaust requirements in the utility schedule differ from equipment spec for several items.
Why it matters: Mismatch can require duct and gas piping rework during construction.
Suggested next step: Revise utility schedule to match equipment spec or provide updated cut sheets.
RFI draft: Please confirm gas and exhaust connection data matches the specified equipment.
Water and drain connection requirements not fully detailedPlumbingHigh
Summary: Utility loads schedule shows water/drain data for some equipment; plumbing riser diagram does not show all connections.
Why it matters: Missing connections can cause delays and change orders.
Suggested next step: Coordinate utility schedule with plumbing drawings and add missing connections.
RFI draft: Please add plumbing connections for all equipment shown on the utility schedule.
Ventilation and make-up air for equipment roomsMechanicalHigh
Summary: Equipment room ventilation and make-up air requirements are not fully coordinated with equipment schedules.
Why it matters: Insufficient ventilation can affect equipment operation and code compliance.
Suggested next step: Verify ventilation rates and make-up air against equipment schedules.
RFI draft: Please confirm ventilation and make-up air for equipment rooms per IMC.
Panel schedule spare capacity for future equipmentElectricalHigh
Summary: Panel schedules show limited spare capacity; future equipment or circuits may require panel upgrades.
Why it matters: Lack of spare capacity can force costly panel changes later.
Suggested next step: Review panel loading and add spare capacity or note future provisions.
RFI draft: Please confirm panel spare capacity for future equipment loads.
Floor drain and waste routing for equipmentPlumbingMedium
Summary: Floor drain and waste routing for equipment areas are not fully detailed on plumbing plans.
Why it matters: Missing routing can cause field delays and rework.
Suggested next step: Add floor drain and waste routing for all equipment requiring drainage.
RFI draft: Please add floor drain and waste routing for equipment areas.
Control and sequence of operation for mechanical systemsMechanicalMedium
Summary: Control narrative and sequence of operation are not fully aligned with equipment schedule and drawings.
Why it matters: Commissioning and acceptance depend on clear control intent.
Suggested next step: Coordinate control narrative with equipment schedule and mechanical drawings.
RFI draft: Please confirm control sequence matches equipment schedule.
Accessible route and clear floor space at equipmentArchitecturalMedium
Summary: Clear floor space and accessible route to equipment for maintenance need verification per ADA.
Why it matters: Accessibility compliance is required for permit and occupancy.
Suggested next step: Verify clear floor space and accessible route at equipment locations.
RFI draft: Please confirm accessible route and clear floor space at equipment per IBC Chapter 11.
GFCI and disconnect requirements for equipmentElectricalLow
Summary: GFCI and local disconnect requirements for equipment should be verified per NEC.
Why it matters: Code compliance and safety.
Suggested next step: Verify GFCI and disconnect requirements on electrical design.
RFI draft: Please confirm GFCI and disconnect requirements per NEC.
Equipment room door size and accessArchitecturalLow
Summary: Equipment room door size and access path should allow for equipment replacement.
Why it matters: Future maintenance and replacement require adequate access.
Suggested next step: Verify door size and access path for largest equipment.
RFI draft: Please confirm equipment room door size allows for equipment replacement.
This is an anonymized example. Findings shown are excerpts for illustration. Actual project details have been modified to protect client confidentiality.
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