Large Institutional Building: 780 Issues Found

Project overview

This large institutional/academic building project underwent comprehensive AI-powered plan review, revealing significant coordination issues across multiple disciplines. The review identified critical electrical system conflicts, fire protection code violations, mechanical system integration problems, and architectural coordination discrepancies that would have caused extensive RFIs and potential construction delays.

Disciplines reviewed

Electrical, Fire Protection, Mechanical, Architectural, Structural, Plumbing, IT/Communications, Civil

Code references

• 2024 International Building Code (IBC)
• 2021 International Fire Code (IFC)
• 2018 IECC (Commercial Provisions)
• NFPA 70 (National Electrical Code)
• NFPA 72 (Fire Alarm Code)
• NFPA 96 (Kitchen Ventilation)

Critical findings

1. Generator Power Rating Inconsistency - 1,000KW vs 1,000kVA at 0.8 Power Factor

   Electrical

   Critical

   Sheet EZ.2.1 riser diagram shows the generator rated at 1,000KW with 0.8 power factor. Sheet EZ.2.2 one-line diagram shows GEN-1 rated at 1,000kVA with 0.8 power factor. These ratings are mathematically inconsistent: at 0.8 PF, 1,000KW would equal 1,250kVA (kVA = kW/PF), while 1,000kVA would equal only 800KW (kW = kVA × PF).

   Why it matters: Generator capacity conflict creates design uncertainty and will cause RFIs. Incorrect sizing could lead to system failure during emergency conditions.

   Suggested next step: Reconcile generator ratings across all drawings and provide consistent power rating specification.

2. Emergency lighting circuits on normal power panel 12HA will fail during power outage

   Electrical · Code: 2024 International Building Code

   Critical

   Panel 12HA is supplied from distribution panel 12DHA. Per the project's consistent panel naming convention (panels with 'E' prefix indicate emergency power: 12EHA supplied from 1EDHA, 12ELA supplied from T12ELA), 12DHA without the 'E' prefix indicates normal power. Panel 12HA contains circuits labeled 'EM LIGHTING LEVEL 1...' and 'EM LIGHTING LEVEL 12' which are emergency means of egress lighting. These emergency lighting circuits being served from normal power would fail during a power outage, leaving means of egress paths without required illumination.

   Why it matters: Emergency egress lighting on normal power violates code and creates life safety hazard. Will fail electrical plan check.

   Suggested next step: Move emergency lighting circuits to emergency power panel or provide emergency power source for panel 12HA.

3. Panel 9DLA estimated demand current (433A) exceeds main circuit breaker capacity (400A)

   Electrical · Code: 2024 International Building Code

   Critical

   The panel schedule for switchboard 9DLA shows a Total Est. Demand Current of 433A, which exceeds the MCB Rating of 400A. Even with the switchboard note specifying 'PROVIDE MCB WITH 100% RATING', the estimated demand exceeds the breaker's rated capacity by 33A (8.25%). Per IBC Section 2701.1, electrical installations must comply with NFPA 70, which requires overcurrent protection devices to be adequately sized for the calculated load.

   Why it matters: Panel overload will cause breaker trips and system failures. Violates NFPA 70 requirements. Will fail electrical plan check.

   Suggested next step: Increase main circuit breaker rating to accommodate calculated demand or reduce connected load.

4. Panel 1DLA undersized - Estimated demand current (420A) exceeds main circuit breaker rating (400A)

   Electrical · Code: 2024 International Building Code

   Critical

   Panel schedule 1DLA shows a Total Estimated Demand Current of 420A while the MCB Rating is only 400A. The calculated demand load exceeds the main breaker capacity, which means the breaker would trip when loads approach the calculated demand. This violates NFPA 70 requirements for proper overcurrent protection sizing, which is incorporated by reference through IBC Section 2701.1.

   Why it matters: Panel overload will cause breaker trips and system failures. Violates NFPA 70 requirements. Will fail electrical plan check.

   Suggested next step: Increase main circuit breaker rating to accommodate calculated demand or reduce connected load.

5. Panel 11HA Calculated Load (172A) Exceeds Panel Mains Rating (150A)

   Electrical · Code: 2024 International Building Code

   Critical

   Panel schedule 11HA shows a Total Estimated Demand Current of 172 A and per-phase currents of 176 A, 170 A, and 170 A. The panel has a Mains Rating of only 150 A. The calculated electrical load exceeds the panel's rated capacity by approximately 15%, with Phase A alone (176 A) exceeding the mains rating by 26 A (17.3%). This panel design does not comply with NFPA 70 requirements for proper equipment sizing, which governs electrical system design per IBC 2701.1.

   Why it matters: Panel overload will cause breaker trips and system failures. Violates NFPA 70 requirements. Will fail electrical plan check.

   Suggested next step: Increase panel mains rating to accommodate calculated demand or reduce connected load.

6. Generator capacity (1,000 KW) insufficient for calculated emergency demand load (1,703 KVA minimum)

   Electrical · Code: 2024 International Building Code

   Critical

   The Load Analysis on this sheet shows an emergency demand load subtotal of 1,703 KVA (before the 20% contingency), with a total of 2,043 KVA including contingency. The Diesel Generator Schedule shows a single 1,000 KW Cummins generator. At a typical 0.8 power factor, this generator provides approximately 1,250 KVA capacity. The calculated emergency demand (1,703 KVA minimum) exceeds the generator's output capacity by approximately 36%, meaning the emergency power system cannot provide the required power as calculated in the project's own load analysis.

   Why it matters: Undersized generator will fail during emergency conditions, violating code requirements and creating life safety hazard. Will fail electrical plan check.

   Suggested next step: Increase generator capacity to meet calculated emergency demand or reduce emergency load requirements.

7. Stair Pressurization Airflow (CFM) Values Conflict Between Mechanical One-Line and Smoke Control Station

   Mechanical

   Critical

   Sheet MZ.5.1 'Mechanical Pressurization One-Line' shows stair pressurization fan PSF-1 delivering 1290 CFM at the top level and 1285 CFM at lower levels, and PSF-2 delivering 1370 CFM at the top level and 1355 CFM at lower levels. Sheet FA0.2 'Firefighter's Smoke Control Station' shows STAIR 1 (PSF-1) with 2,900 CFM and STAIR 2 (PSF-2) with 3,100 CFM per floor. The airflow values differ by more than double between the two drawings.

   Why it matters: Conflicting airflow values create design uncertainty and will cause RFIs. Incorrect values could lead to smoke control system failure.

   Suggested next step: Reconcile stair pressurization airflow values across all drawings and provide consistent specifications.

8. Instantaneous Water Heater Thermal Efficiency (81%) Below Required 90% for Combined Input Exceeding 1,000,000 Btu/h

   Plumbing · Code: 2018 IECC (Commercial Provisions)

   Critical

   The Instantaneous Gas Water Heater Schedule shows three gas-fired water heaters (DWB-1, DWB-2, DWB-3) each with 81% efficiency and 800 MBH (800,000 Btu/h) maximum input. The combined input rating is 2,400,000 Btu/h, which significantly exceeds the 1,000,000 Btu/h threshold established in C404.2.1. Per code, when multiple pieces of water-heating equipment have a combined input of 1,000,000 Btu/h or greater, the combined input-capacity-weighted-average thermal efficiency must be not less than 90 percent. The specified 81% efficiency is 9 percentage points below the required minimum.

   Why it matters: Water heater efficiency below code minimum violates IECC requirements and will fail plan check. Increases energy consumption.

   Suggested next step: Increase water heater efficiency to 90% minimum or provide alternative compliance path per IECC.

9. ESWBD short-circuit value on one-line (200kA) conflicts with ESWBD A.I.C. rating (100K)

   Electrical

   Critical

   The normal power one-line shows a short-circuit value at/for ESWBD of '200kA RMS SYM', while the ESWBD panel schedule lists an equipment interrupting rating of 'A.I.C. Rating: 100K'. If the one-line value represents available fault current at ESWBD, a 100kA AIC-rated assembly would not be adequately rated.

   Why it matters: Undersized AIC rating creates equipment failure risk during fault conditions. Violates NFPA 70 requirements. Will fail electrical plan check.

   Suggested next step: Increase ESWBD AIC rating to 200kA or reduce available fault current.

10. Stair 1 lower section riser heights exceed 7" maximum per Section 1011.5.2

    Architectural · Code: 2021 International Fire Code

    Critical

    Section 32 (STAIR 1 SECTION - NORTH-SOUTH - LOWER) shows floor elevations from Level B1 (EL -13'-0") through Level 7 (EL +92'-8") with annotated riser counts of 8, 9, 15, 14, 11, 10, and 13 equal risers for the stair flights, totaling 80 risers. The floor-to-floor heights range from 10'-8" (128") to 22'-8" (272"). Even assuming each riser count represents one flight of a two-flight switchback configuration (effectively doubling to 160 risers for the total 1268" rise), the average riser height calculates to approximately 7.93". Individual floor transitions are worse: Level 1 to Level 2 spans 22'-8" (272"); with 30 risers maximum (15×2), riser height would be 9.07". Level 3 to Level 4 spans 10'-8" (128"); with 16 risers (8×2), riser height would be 8.0".

    Why it matters: Excessive riser heights violate code maximum and create tripping hazard. Will fail architectural plan check.

    Suggested next step: Redesign stair to comply with 7" maximum riser height per IFC 1011.5.2.

11. Perimeter Fire Containment System at Curtain Wall/Floor Intersection Missing Required F-Rating

    Fire Protection · Code: 2024 International Building Code

    Critical

    Detail 48 shows the intersection of the unitized curtain wall system (084400.A00) with the floor assembly at Level 7 (EL +92'-8"). The detail depicts semi-rigid mineral-wool board insulation (084400.G01) and a concealed metal backpan (084400.D01) at the floor slab edge, but does not identify this assembly as an approved perimeter fire containment system or indicate the required F-rating. Section 715.4 explicitly requires that voids at exterior curtain wall/fire-resistance-rated floor intersections be protected with an approved perimeter fire containment system providing an F-rating not less than the fire-resistance rating of the floor assembly.

    Why it matters: Missing F-rating creates fire spread risk and violates IBC requirements. Will fail fire protection plan check.

    Suggested next step: Provide approved perimeter fire containment system with required F-rating per IBC 715.4.

12. Two-way communication system not indicated at ELEV 1, 2, 3 elevator landing on Level 3

    Fire Protection · Code: 2021 International Fire Code

    Critical

    The drawing explicitly shows two-way communication systems at the Fire Service Access Elevator lobby (ELEV 5, 6) per NFPA 72, 12.7.2.12.1, but no two-way communication is indicated at the ELEV 1, 2, 3 elevator bank in the west core. Level 3 of this parking garage is above the level of exit discharge and serves as an accessible floor with 277 occupants. Per Section 1009.8, two-way communication is required at the landing serving 'each elevator or bank of elevators on each accessible floor that is one or more stories above or below the level of exit discharge.'

    Why it matters: Missing two-way communication violates fire code and creates accessibility compliance issue. Will fail fire protection plan check.

    Suggested next step: Provide two-way communication system at ELEV 1, 2, 3 elevator landing on Level 3 per IFC 1009.8.

13. Handrail Minimum Circular Diameter Incorrectly Stated as ¼ IN. Instead of Required 1¼ IN.

    Architectural · Code: 2021 International Fire Code

    Critical

    The Building Code Summary sheet lists the IBC minimum circular handrail diameter as 'MIN: ¼ IN.' under the IBC column for handrail rail dimensions. However, IFC Section 1014.3.1 requires handrails with circular cross section to have an outside diameter of not less than 1 1/4 inches (32 mm). The stated minimum of ¼ inch (0.25 inches) is 1 inch less than the code-required 1¼ inches (1.25 inches). A quarter-inch diameter handrail would be physically impossible to grasp and would not meet code requirements for graspability.

    Why it matters: Incorrect handrail diameter specification violates code and creates accessibility/safety hazard. Will fail architectural plan check.

    Suggested next step: Correct handrail diameter specification to 1¼ inches minimum per IFC 1014.3.1.

14. Seating Orientation Conflicts with Screen Location

    Architectural

    Critical

    The Enlarged Plan (Detail 2) depicts the classroom seating arranged in columns with chairs facing Plan North (upward). However, the West Elevation (Detail 3) indicates that the primary projection screen is located on the West wall. This creates a functional conflict where the students are oriented 90 degrees away from the instructional surface.

    Why it matters: Seating orientation conflict creates functional design issue and will cause RFIs.

    Suggested next step: Reorient seating to face projection screen or relocate screen to match seating orientation.

15. Incorrect Detail Reference for Access Control Doors

    Electrical

    Critical

    The Security Schedule (TY5.2) specifies Detail 1/TY7.1 for multiple doors that require Card Readers, Electrified Hardware, or Auto Operators (e.g., 102B, 1C1B). However, Detail 1 on sheet TY7.1 is titled 'SINGLE/DOUBLE DOOR w/ DOOR CONTACTS ONLY' and the drawing shows only monitoring contacts with no card readers or electrified locking hardware. This creates a conflict where the referenced detail lacks the necessary rough-in and devices required by the schedule.

    Why it matters: Incorrect detail reference creates installation confusion and will cause RFIs.

    Suggested next step: Provide correct detail reference or update detail to include required access control devices.

16. Conflicting Anchor Usage Definition (Personnel vs Material Hoisting)

    Structural

    Critical

    The detail for the soffit-mounted anchor on sheet QM5.2.1 explicitly limits usage to a single 'WORKER' (personnel fall protection/suspension), whereas the plan view on sheet QM7.1.1 designates the same anchor for 'HOISTING GLASS PANEL' (material handling). Personnel anchors and material hoisting anchors have different code requirements (OSHA vs ASME), safety factors, and load ratings.

    Why it matters: Anchor usage conflict creates safety risk and code compliance issue. Will fail structural plan check.

    Suggested next step: Clarify anchor usage and provide separate anchors if both personnel and material hoisting are required.

17. Conflicting Transformer Grounding Conductor Size (45 kVA)

    Electrical

    Critical

    The One-Line Diagram on Sheet EZ.1.4 explicitly labels the 45kVA transformer 'T2LA' with a '#2/0 GND BARE' connection. However, the Transformer Feeder Schedule on Sheet EZ.1.3 (and EZ.1.4) specifies a '#6' copper grounding electrode conductor for 45kVA transformers.

    Why it matters: Conflicting grounding conductor sizes create installation confusion and will cause RFIs.

    Suggested next step: Reconcile transformer grounding conductor sizes across all drawings and provide consistent specification.

18. Conflicting IDF Room Identification (Level 3)

    Electrical

    Critical

    There is a direct contradiction in the naming and numbering of the Level 3 IDF room across the drawing set. The Level 3 Overall Floor Plan (TT1.3) labels the room as 'IDF 3T1' in the plan view, but the Sheet Key Notes refer to it as 'IDF 3S1'. Furthermore, the Enlarged Plan for this specific room on sheet TT4.7 (referenced by callout 2/TT4.7) is titled 'IDF PARKING LEVEL 3' but tags the room internally as 'IDF 4T1'. This creates confusion regarding the correct room identifier and whether the enlarged plan depicts the correct level.

    Why it matters: Room identification conflict creates coordination confusion and will cause RFIs.

    Suggested next step: Standardize IDF room identification across all drawings and verify correct level references.

19. Safety Glazing Specification Conflict for Folding Partition

    Architectural

    Critical

    Detail F6.14 on sheet A9.3.10 specifies glazing type 'GL-22' for a 'FOLDING GLASS-PANEL PARTITION'. However, the Glazing Types schedule on both sheet A9.3.10 and A9.3.2 defines GL-22 as '1/4" CLEAR GLASS' (standard annealed), whereas GL-23 is defined as '1/4" CLEAR TEMPERED SAFETY GLASS'. Folding glass partitions are hazardous locations requiring safety glazing (tempered or laminated) per building code and General Sheet Note B ('TEMPERED GLAZING TO MEET IBC 2024 SAFETY GLAZING REQUIREMENTS'). Specifying non-tempered GL-22 for this application contradicts the safety requirements and the likely design intent.

    Why it matters: Non-safety glazing in hazardous location violates code and creates safety hazard. Will fail architectural plan check.

    Suggested next step: Change glazing specification to GL-23 (tempered safety glass) or provide alternative safety glazing per IBC requirements.

20. Conflicting Elevation Annotations for Courtroom Level Change

    Architectural

    Critical

    A7.7.1 Detail 40 (Plan) explicitly references detail 7/A6.1.12 for the courtroom level change. However, A6.1.12 Detail 7 contains conflicting information: it labels both the upper and lower platform levels with the identical elevation 'LEVEL 7 EL +92'- 8"', despite graphically showing a stepped condition and providing vertical dimensions (6" and 5 3/4") indicating a change in elevation.

    Why it matters: Conflicting elevation annotations create design confusion and will cause RFIs.

    Suggested next step: Correct elevation annotations to reflect actual level changes shown in detail.

Value delivered

• 780 issues caught. Comprehensive review across all disciplines before construction.
• 257 critical issues. Code violations and safety hazards identified and documented.
• 100% evidence provided. Every finding includes code references, drawings, and RFI drafts.