Plan Review: 49 Issues Found

Summary: 31 index entries | 25 perfect matches | 6 mismatched | 0 missing Mismatched (6): S1.0: Expected: NOTES AND DETAILS (S1.0) | Actual: NOTES & DETAILS (S1.0)(p7) E0.1: Expected: ELECT LEGEND, ABBREVIATIONS, NOTES & CALCS (E0.1) | Actual: ELECTRICAL LEGEND, ABBREVIATIONS, NOTES & CALCULATIONS (E0.1)(p8) E2.1: Expected: ELECTRICAL FLOOR PLAN BUILDINGS B & C (E2.1) | Actua...

Why it matters: Addressing this before construction prevents rework and supports code compliance.

Suggested next step: Review drawings and specifications to resolve before construction.

RFI draft: Please clarify: Drawing Index Audit: 0 missing, 6 mismatched out of 31 sheets

Summary: The fire riser diagrams show the Carbon Monoxide Detectors ("CO") are connected to circuit "1/B" originating from the new Power Supply "PS-1". The Cable Schedule identifies Cable Type "B" as a "NAC (NOTIFICATION APPLIANCE CIRCUIT) INTERIOR". Furthermore, the Battery Calculations for PS-1 list the 15 connected devices as a "CO SOUNDER" with a "STANDBY CURRENT" of 0 amps. Carbon monoxide detector...

Why it matters: Omitting the standby load of 15 CO detectors from the battery calculations means the 7 AH battery specified for the booster power supply is severely undersized. During a power outage, the batteries will deplete long before the required secondary power duration is met, disabling the building's car...

Suggested next step: Please confirm if circuit "1/B" provides continuous 24VDC auxiliary power to the Edwards 260-CO detectors. If so, update the Cable Schedule to correctly identify this circuit type (rather than NAC), and revise the PS-1 Battery Calculations to include the standby current for th...

RFI draft: Please confirm if circuit "1/B" provides continuous 24VDC auxiliary power to the Edwards 260-CO detectors. If so, update the Cable Schedule to correctly identify this circuit type (rather than NAC), and revise the PS-1 Battery Calculations to incl...

Summary: The 'POWER SUPPLY PANEL (PS-1) BATTERY CALCULATIONS' list a quantity of 15 'CO SOUNDER' devices but specify '0' Amps for their standby current. However, the schedule indicates the CO devices are Edwards 260-CO Carbon Monoxide Detectors, which actively monitor for gas and require continuous DC standby power. The riser diagrams show these CO detectors are powered by circuit '1/B' from PS-1, yet t...

Why it matters: Accurate battery calculations are required by IBC 907.1.1 and 907.1.2. Without accounting for the continuous standby load of the 15 CO detectors, the system fails to verify that the secondary power supply can maintain operation of the life-safety gas detection system. During an AC power failure, ...

Suggested next step: Please revise the PS-1 battery calculations to include the manufacturer-specified continuous standby current draw for the 15 carbon monoxide detectors (Edwards 260-CO). Upsize the PS-1 backup batteries accordingly to ensure the system functions for the required duration during...

RFI draft: Please revise the PS-1 battery calculations to include the manufacturer-specified continuous standby current draw for the 15 carbon monoxide detectors (Edwards 260-CO). Upsize the PS-1 backup batteries accordingly to ensure the system functions fo...

Summary: Sheet A2.1 specifies "BUILT UP ROOFING SYSTEM" for the low-slope areas of Buildings A, B, C & M, referencing specification section 07 51 00. Sheet A8.0 Detail 10 confirms this as a "BUILT UP ROOF SYSTEM" with cool cap sheet, base & 2 ply sheets, and 1/2" insulation board. However, A8.0's penetration flashing details (Detail 6 and the Field Wrapped Penetration Flashing detail) specify "SINGLE PL...

Why it matters: This contradiction creates confusion during construction about which flashing approach to use at roof penetrations. Note 3 on A2.1 directs the contractor to A8.0 for penetration flashing details, but those details show single-ply membrane components that are incompatible with a built-up roof asse...

Suggested next step: Please clarify whether the low-slope roofing system is a built-up roof (as specified on A2.1 and confirmed in A8.0 Detail 10) or a single-ply membrane system (as shown in A8.0 penetration flashing details). Please provide revised penetration flashing details that are compatibl...

RFI draft: Please clarify whether the low-slope roofing system is a built-up roof (as specified on A2.1 and confirmed in A8.0 Detail 10) or a single-ply membrane system (as shown in A8.0 penetration flashing details). Please provide revised penetration flash...

Summary: Sheet M1.0 (Overall Mechanical Roof Plan) shows a 2" gas line feeding Building B labeled at 300 MBH. However, sheet MB1.0 (Mechanical New Roof Plan - Bldg B) shows rooftop AC units with gas loads that far exceed 300 MBH: AC B1 at 300 MBH, AC B2 at 175 MBH, AC B3 at 75 MBH, and AC B4 at 100 MBH, totaling at least 650 MBH. AC B1 alone consumes the entire 300 MBH capacity shown on the overall plan...

Why it matters: This discrepancy means the 2" gas pipe sized for 300 MBH on M1.0 cannot deliver the 650+ MBH required by the equipment shown on MB1.0. The total campus gas load shown on M1.0 at the meter assembly (total 2160 MBH) may also need to be revised if Building B's actual load is higher than accounted fo...

Suggested next step: Request the mechanical engineer clarify the correct total gas load for Building B and reconcile the gas pipe sizing on M1.0 with the equipment loads shown on MB1.0. If the total Building B gas load is 650+ MBH, the gas pipe size, main line calculations, and total gas load at t...

RFI draft: Request the mechanical engineer clarify the correct total gas load for Building B and reconcile the gas pipe sizing on M1.0 with the equipment loads shown on MB1.0. If the total Building B gas load is 650+ MBH, the gas pipe size, main line calcula...

Summary: The Mechanical Floor Plan (MB1.1) assigns unit AC/B1 to the Staff Lounge (750 CFM total supply) and AC/B4 to the Library (1600 CFM total supply), while two identical Classrooms (1100 CFM total supply each) are assigned to AC/B2 and AC/B3. However, the Mechanical New Roof Plan (MB1.0) specifies vastly disproportionate capacities for these assignments: AC B1 is 300 MBH, AC B2 is 175 MBH, AC B4 is...

Why it matters: The unit designations on the floor plan controls/sensors appear to be completely mislabeled relative to the roof plan equipment layout and capacities. If constructed as drawn, the system will be severely unbalanced, causing immediate short-cycling/high-static issues in the Staff Lounge and inadeq...

Suggested next step: Please clarify the correct HVAC unit designations for each zone on the floor plan to ensure they accurately align with the unit capacities and ductwork routing shown on the roof plan.

RFI draft: Please clarify the correct HVAC unit designations for each zone on the floor plan to ensure they accurately align with the unit capacities and ductwork routing shown on the roof plan.

Summary: Mechanical General Note 11 states: "DO NOT INSTALL THERMOSTATS AND ROOM TEMPERATURE SENSORS ABOVE CASEWORK, SHELVING OR OTHER OBSTRUCTIONS OVER 24" IN DEPTH AND 34" IN HEIGHT." The use of "AND" means the prohibition only applies when BOTH the depth exceeds 24" AND the height exceeds 34" simultaneously. Per ADA Section 308/309 and Figure 308.3.2, for an obstructed high side reach, the obstructio...

Why it matters: Thermostats and temperature sensors are operable parts under ADA Section 309 and must comply with reach ranges in Section 308. If thermostats are installed above obstructions deeper than 24" (but shorter than 34"), the installer would believe compliance is met per the note's wording, but this wou...

Suggested next step: Request the mechanical engineer revise Note 11 to read "OR" instead of "AND" between the two obstruction dimensional limits, such that installation above obstructions over 24" in depth OR over 34" in height is prohibited, consistent with ADA 2010 Section 308 obstructed reach r...

RFI draft: Request the mechanical engineer revise Note 11 to read "OR" instead of "AND" between the two obstruction dimensional limits, such that installation above obstructions over 24" in depth OR over 34" in height is prohibited, consistent with ADA 2010 ...

Summary: The drawings indicate an upgrade to the existing fire alarm system by adding a 'NEW FIRE ALARM POWER SUPPLY' and new monitor modules/carbon monoxide detectors ('MM CO') inside public and common use areas such as the 'CLASSROOM' (Key Notes 1 and 4). The design also specifies a 'TANDEM INTERCONNECT' on these devices with a 'SEPARATE ALARM' zone, providing audible alarm coverage for a CO event (Ke...

Why it matters: Omitting visible alarms for new carbon monoxide alarm zones discriminates against deaf or hard-of-hearing occupants, posing a severe life safety risk. This violation of ADA scoping requirements will lead to failed accessibility and fire marshal inspections, requiring costly change orders to route...

Suggested next step: The drawings detail new tandem-interconnected CO detectors and a new fire alarm power supply but do not indicate visible notification appliances for these new alarms. Please revise the design to include visible alarms (strobes) for the new CO alarm zones in all public, common ...

RFI draft: The drawings detail new tandem-interconnected CO detectors and a new fire alarm power supply but do not indicate visible notification appliances for these new alarms. Please revise the design to include visible alarms (strobes) for the new CO alar...

Summary: The wind design data section on sheet S1.0 includes a Components & Cladding table with row headers for Roof Zones 1, 2, 3 and Wall Zones 4, 5, but the design wind pressure values for all zones are blank. Only a note stating a minimum of 16.0 PSF is provided. CBC Section 1603.1.4(5) requires that design wind pressures for exterior component and cladding materials not specifically designed by the...

Why it matters: Without specific C&C zone pressures, contractors and subcontractors responsible for exterior cladding, windows, doors, roofing, and wall materials cannot properly select products or design attachments to resist the required wind loads. The 16.0 PSF minimum stated in the note is the code minimum b...

Suggested next step: Request that the Structural Engineer of Record provide the calculated design wind pressures for all component and cladding zones (Roof Zones 1, 2, 3 and Wall Zones 4, 5) based on the stated design parameters: Vult = 115 MPH, Risk Category III, Exposure C, and Enclosed building...

RFI draft: Request that the Structural Engineer of Record provide the calculated design wind pressures for all component and cladding zones (Roof Zones 1, 2, 3 and Wall Zones 4, 5) based on the stated design parameters: Vult = 115 MPH, Risk Category III, Exp...

Summary: The NRCC-MCH-05-E compliance form for equipment tag AC-B1 explicitly shows a required ventilation of 97 CFM per T-24 Section 120.1(b), but the 'As Scheduled' ventilation is only 89 CFM. This is an 8 CFM (approximately 8%) deficiency below the minimum required ventilation. All other HVAC units documented on the compliance forms show scheduled ventilation values that meet or exceed the correspond...

Why it matters: This documented non-compliance on the Title-24 compliance form would be flagged during plan review by the enforcement agency, likely delaying permit issuance. The unit AC-B1 must either be resized or its outdoor air intake adjusted to meet the minimum ventilation requirement. Inadequate ventilati...

Suggested next step: Request that the mechanical engineer verify the minimum ventilation requirement for unit AC-B1 and revise the equipment selection or outdoor air settings so that the scheduled ventilation meets or exceeds the 97 CFM requirement documented on the NRCC-MCH-05-E compliance form. ...

RFI draft: Request that the mechanical engineer verify the minimum ventilation requirement for unit AC-B1 and revise the equipment selection or outdoor air settings so that the scheduled ventilation meets or exceeds the 97 CFM requirement documented on the N...

Summary: The 'EXISTING BUILDING CODE ANAYSIS' schedule lists Building M as a single building with an actual area of 6,232 sq ft and a mixed occupancy of 'A-2 & B'. However, a footnote states that Building M has an 'EXISTING 2 HOUR FIRE WALL BETWEEN OCCUPANCY A-2 & B'. According to CBC Section 503.1, each portion of a building separated by a fire wall shall be considered a separate building.

Why it matters: If a true fire wall exists, Building M consists of two structurally separate buildings, and their respective areas and heights must be tabulated independently in the code analysis rather than aggregated into a single 6,232 sq ft building. If the intent was merely to separate the occupancies withi...

Suggested next step: Clarify whether the 2-hour separation in Building M is a 'Fire Wall' (creating two separate buildings per Section 503.1) or a 'Fire Barrier' (separating occupancies within a single building per Section 508.4). Update the building code analysis terminology and area tabulations ...

RFI draft: Clarify whether the 2-hour separation in Building M is a 'Fire Wall' (creating two separate buildings per Section 503.1) or a 'Fire Barrier' (separating occupancies within a single building per Section 508.4). Update the building code analysis ter...

Summary: Key Notes 2 and 3 direct the new Carbon Monoxide detectors to be configured on a "SEPARATE ALARM AND TROUBLE ZONE" using tandem interconnects, with "REMOTE NOTIFICATION AT FRONT OFFICE". However, CBC 907.6.4.4 requires that when initiating devices activate and occupant notification is required for evacuation, all notification zones must operate simultaneously throughout the building. Configurin...

Why it matters: Isolating the CO alarm notification to only the tandem-connected devices and the front office could prevent a coordinated, building-wide evacuation during a severe carbon monoxide leak, risking life safety and causing the fire alarm system to fail code compliance inspections.

Suggested next step: Clarify if the activation of Carbon Monoxide detectors is intended to trigger a building-wide evacuation. If so, please revise the sequence of operations in Notes 2 and 3 to ensure the CO detectors activate all notification zones simultaneously as required by CBC 907.6.4.4, ra...

RFI draft: Clarify if the activation of Carbon Monoxide detectors is intended to trigger a building-wide evacuation. If so, please revise the sequence of operations in Notes 2 and 3 to ensure the CO detectors activate all notification zones simultaneously as...

Summary: The Carbon Monoxide Detection System note explicitly groups "LIBRARYS" and "GYMS" under "GROUP E OCCUPANCIES". However, according to the building code (Section 303.4), Libraries and Gymnasiums (without spectator seating) are explicitly classified as Assembly Group A-3 occupancies, not Group E.

Why it matters: Occupancy classification is foundational to the building design. Misclassifying an Assembly Group A-3 occupancy as an Educational Group E occupancy can result in incorrect life safety evaluations, including invalid fire-resistance ratings, incorrect allowable area calculations, undersized egress ...

Suggested next step: Please confirm the occupancy classifications for the libraries and gymnasiums. The mechanical notes currently list them as Group E, but CBC Section 303.4 classifies them as Assembly Group A-3. Update the notes and ensure that all architectural life safety, egress, and fire pro...

RFI draft: Please confirm the occupancy classifications for the libraries and gymnasiums. The mechanical notes currently list them as Group E, but CBC Section 303.4 classifies them as Assembly Group A-3. Update the notes and ensure that all architectural lif...

Summary: The wind design data on Sheet S1.0 includes a table titled 'DESIGN WIND PRESSURE (PSF)' with rows specifically laid out for Roof Zones 1, 2, 3 and Wall Zones 4, 5, but all pressure values are left blank. The table structure exists and is clearly intended to convey component and cladding (C&C) design pressures, yet no numerical values have been entered. IBC Section 1603.1.4 item 5 requires 'Desi...

Why it matters: Without the C&C design wind pressures, exterior cladding, roofing, and glazing subcontractors cannot verify that their products and installations meet the required wind resistance. This omission will likely result in a plan check correction, delaying permit issuance. During construction, it could...

Suggested next step: Request the structural engineer of record provide the component and cladding design wind pressures for Roof Zones 1, 2, 3 and Wall Zones 4, 5 in the design wind pressure table on Sheet S1.0, based on the stated parameters (Vult = 115 MPH, Risk Category III, Exposure C, Enclose...

RFI draft: Request the structural engineer of record provide the component and cladding design wind pressures for Roof Zones 1, 2, 3 and Wall Zones 4, 5 in the design wind pressure table on Sheet S1.0, based on the stated parameters (Vult = 115 MPH, Risk Cat...

Summary: The NRCC-MCH-05-E compliance form for unit AC-B1 explicitly shows that the required ventilation per T-24 Section 120.1(b) is 97 CFM, but the as-scheduled ventilation is only 89 CFM. This is a clear deficiency where the designed outdoor air ventilation does not meet the stated minimum requirement. IBC Section 2801.1 requires mechanical systems to be constructed and installed in accordance with t...

Why it matters: This ventilation shortfall for AC-B1 will be flagged during plan review by the enforcement agency, as the compliance form itself shows non-conformance. This could delay permitting and would require either resizing the unit, adjusting the outdoor air damper settings, or revising the load calculati...

Suggested next step: Please clarify the ventilation discrepancy for unit AC-B1, where the NRCC-MCH-05-E form shows a required ventilation of 97 CFM but only 89 CFM as scheduled. Confirm whether the unit or outdoor air settings will be revised to meet the 97 CFM minimum, or whether the load calcula...

RFI draft: Please clarify the ventilation discrepancy for unit AC-B1, where the NRCC-MCH-05-E form shows a required ventilation of 97 CFM but only 89 CFM as scheduled. Confirm whether the unit or outdoor air settings will be revised to meet the 97 CFM minimu...