Plan Review: 12 Issues Found

Summary: Keyed Note 4 on the drawing directs the contractor to "CONNECT NEW UNIT HEATER TO NEW 15A/1P CIRCUIT FROM NEAREST 120/208V PANEL". However, the plan tags industrial-scale unit heaters as "UH-75" and "UH-100". According to standard electrical engineering practice, a 15A/1P 120V circuit has a maximum continuous capacity of 1.44 kW, which is insufficient for space heaters of this scale. Furthermor...

Why it matters: Installing a 15A/120V circuit for an industrial unit heater will result in an overloaded circuit, instantly tripped breakers, and a non-functional heating system. The circuit sizing and voltage must be corrected prior to rough-in.

Suggested next step: Please review and revise the circuit size and voltage requirements for unit heaters UH-75 and UH-100. Provide the required amperage and number of poles based on the mechanical equipment schedule.

RFI draft: Please review and revise the circuit size and voltage requirements for unit heaters UH-75 and UH-100. Provide the required amperage and number of poles based on the mechanical equipment schedule.

Summary: There is a direct contradiction regarding which trade is responsible for providing and installing starters and switches for mechanical equipment. The Mechanical Specifications (M-3) state that Division 15 (Mechanical) will supply and mount all starters, disconnects, and switches for the equipment they supply. However, the Typical Power Plan Notes on E-2 state that the Electrical Contractor is t...

Why it matters: Conflicting trade responsibilities in the contract documents will likely lead to scope gaps or duplication in bidding. During construction, this can cause project delays, RFIs, and change orders as trades dispute who is responsible for purchasing and physically mounting the electrical control com...

Suggested next step: Please clarify whether Division 15 (Mechanical) or Division 16 (Electrical) is responsible for supplying and installing the starters, disconnects, and switches for mechanical equipment.

RFI draft: Please clarify whether Division 15 (Mechanical) or Division 16 (Electrical) is responsible for supplying and installing the starters, disconnects, and switches for mechanical equipment.

Summary: Mechanical drawing M-2 specifies in Keyed Note 11 that the '4" RWL DN TO SPLASH PAD BELOW' must be 'HEAT TRACED' and explicitly states 'REFER TO ELECTRIC'. However, the Keyed Notes on the Electrical plan (E-2) outline specific power circuits for other equipment (receptacles, lighting, overhead door openers, unit heaters, and exit signs) but completely omit any power connection, circuit assignme...

Why it matters: Because the mechanical design relies on the electrical drawings to provide power for the rain water leader's heat trace, this omission leaves the system unpowered. In cold climates, an unpowered heat trace on an exposed or unconditioned rain water leader will likely lead to frozen pipes, pipe bur...

Suggested next step: Mechanical Keyed Note 11 on M-2 requests electrical power for the 4" RWL heat trace, but this is not shown on the E-2 power plan. Please provide the circuit designation, panel location, and breaker size for the RWL heat trace.

RFI draft: Mechanical Keyed Note 11 on M-2 requests electrical power for the 4" RWL heat trace, but this is not shown on the E-2 power plan. Please provide the circuit designation, panel location, and breaker size for the RWL heat trace.

Summary: The Mechanical plan (M-2) requires the installation of 10 lbs ABC fire extinguishers. In direct contradiction, the Fire Protection sprinkler plan (FP2) specifies new 5 lb ABC multipurpose fire extinguishers.

Why it matters: Installing the incorrect size of fire extinguisher could lead to code compliance failures during fire marshal inspections if the minimum required extinguishing capacity is not met.

Suggested next step: Please clarify the required size for the new fire extinguishers. Should they be 10 lbs ABC as indicated on M-2, or 5 lbs ABC as specified on FP2?

RFI draft: Please clarify the required size for the new fire extinguishers. Should they be 10 lbs ABC as indicated on M-2, or 5 lbs ABC as specified on FP2?

Summary: The Architectural Site Plan (A1.1) depicts an existing external storage building and its proposed addition in the northwest corner of the site. However, the Fire Protection Site Plan (FP1) omits these structures entirely, showing only the main building footprint and empty space in that corresponding northwest area.

Why it matters: Omitting a significant existing building and its proposed addition from the Fire Protection Site Plan can lead to incomplete assessments of site-wide fire protection needs, including adequate fire hydrant coverage, underground water main routing, spatial separation requirements, and fire departme...

Suggested next step: Please clarify if the External Storage Building and its proposed addition require fire protection services, and update the Fire Protection Site Plan (FP1) to accurately reflect all major site structures shown on the Architectural Site Plan (A1.1).

RFI draft: Please clarify if the External Storage Building and its proposed addition require fire protection services, and update the Fire Protection Site Plan (FP1) to accurately reflect all major site structures shown on the Architectural Site Plan (A1.1).

Summary: Drawing E-1 (Demolition Plan) states that the existing 'WALL MOUNTED UNIT HEATER' is 'TO BE REMOVED/RELOCATED'. In contradiction, drawing M-2 (HVAC Layout) Keyed Note 7 refers to the existing heating unit as an 'EXISTING GAS FIRED INFRARED HEATER' and states it 'IS TO BE REMOVED' with no instruction to relocate it. Additionally, the new electrical plan (E-2) only provides connections for new un...

Why it matters: If the existing heater is meant to be relocated rather than permanently removed, it requires mechanical coordination (gas/venting) and an electrical power connection in its new location. If it is permanently removed, the 'relocated' instruction on the electrical demolition plan will cause confusi...

Suggested next step: Please clarify if the existing wall-mounted unit heater is to be permanently removed (as per M-2) or relocated (as per E-1). If relocated, please update the M-2 and E-2 drawings to show its new location, mechanical connections, and electrical circuiting requirements.

RFI draft: Please clarify if the existing wall-mounted unit heater is to be permanently removed (as per M-2) or relocated (as per E-1). If relocated, please update the M-2 and E-2 drawings to show its new location, mechanical connections, and electrical circ...

Summary: The electrical demolition plan (E-1) identifies 'EXISTING EUROVAC EQUIPMENT' with adjacent 'ER' symbols. However, the electrical power plan (E-2) does not show this equipment in its original or relocated position, and the Keyed Notes provide no circuiting or connection details for it to be re-energized.

Why it matters: Failing to account for the existing Eurovac equipment on the new power plan may lead to missed electrical connections, potentially leaving the equipment unpowered after construction. The electrical contractor needs to know where this equipment will be located and how it should be circuited.

Suggested next step: Please advise if the 'EXISTING EUROVAC EQUIPMENT' shown on E-1 is to remain or be relocated. If so, please update the electrical power plan (E-2) to indicate its location and provide the necessary circuiting details in the Keyed Notes.

RFI draft: Please advise if the 'EXISTING EUROVAC EQUIPMENT' shown on E-1 is to remain or be relocated. If so, please update the electrical power plan (E-2) to indicate its location and provide the necessary circuiting details in the Keyed Notes.

Summary: Drawing E-1 Demolition Note 2 instructs the contractor to 'RETAIN BRANCH CIRCUITS FOR REUSE WHERE POSSIBLE, OTHERWISE, CUT BACK AND MAKE SAFE.' Additionally, Demolition Note 4 reinforces this by stating 'REUSE EXISTING BRANCH CIRCUITS/BREAKERS WHERE POSSIBLE.' However, the Electrical Specification item 40 (Demolition) requires 'REMOVE ALL EXPOSED CONDUITS, BRANCH WIRING, OUTLETS, LUMINAIRES, EM...

Why it matters: This conflict could lead to significant confusion during construction. If the contractor follows the drawing and retains branch circuits, it violates the specification's demolition requirements. If the contractor follows the specification and removes wiring to panelboards, it contradicts the draw...

Suggested next step: Request clarification on whether existing branch circuits serving the demolition area should be retained for reuse as stated in the Demolition Plan notes, or removed entirely back to the panelboards as required by the Electrical Specification item 40. Confirm the intended appr...

RFI draft: Request clarification on whether existing branch circuits serving the demolition area should be retained for reuse as stated in the Demolition Plan notes, or removed entirely back to the panelboards as required by the Electrical Specification item...

Summary: The Site Plan (A1.1) indicates that a "1 STOREY METAL SHED" is to be shifted east of its existing location, north of Addition B. However, the Electrical Plan (E-2) refers to this exact same relocated structure as an "EXISTING OVEN STRUCTURE" and notes the relocation of its associated electrical and fire alarm devices.

Why it matters: A metal shed typically implies a simple storage structure, whereas an oven structure involves complex utility requirements (electrical power, mechanical exhaust, and fire safety). If the structure is an oven, the civil and structural plans may be missing required foundation details for heavy equi...

Suggested next step: Please clarify the correct designation of the structure being relocated north of Addition B. Is it a metal storage shed or an oven structure? If it is an oven structure, please verify that all necessary structural foundation details, as well as mechanical and electrical utilit...

RFI draft: Please clarify the correct designation of the structure being relocated north of Addition B. Is it a metal storage shed or an oven structure? If it is an oven structure, please verify that all necessary structural foundation details, as well as me...

Summary: The mechanical plan (M-2) labels the vertical grid lines in the Test Lab addition as 16, 15x, 14z, 14w, and 14. However, the sprinkler plan (FP2) labels the corresponding grid lines as 16, 15a, 14z, and 14, changing '15x' to '15a' and completely omitting the '14w' grid line.

Why it matters: Mismatched grid line nomenclature across disciplines suggests differing or outdated architectural backgrounds were used. This discrepancy will cause confusion during the spatial layout, dimensioning, and field coordination of piping and mechanical equipment.

Suggested next step: Please confirm the correct architectural grid line nomenclature for the Test Lab area (e.g., 15x vs. 15a, and whether grid 14w exists) and issue updated background drawings to ensure coordinated layout.

RFI draft: Please confirm the correct architectural grid line nomenclature for the Test Lab area (e.g., 15x vs. 15a, and whether grid 14w exists) and issue updated background drawings to ensure coordinated layout.

Summary: There is a discrepancy in the architectural backgrounds used between the electrical and fire protection plans regarding the exterior wall on grid line 16 (between grids A5x and A4x). The Electrical plan shows a new 3'-0"x7'-0" exit door at this location, whereas the Fire Protection plan shows a continuous wall with no door indicated.

Why it matters: Using inconsistent architectural backgrounds across disciplines can lead to clashes or improper placement of life safety devices, sprinkler heads, and egress lighting. Coordinated backgrounds are necessary to ensure all trades are installing systems based on the exact same architectural layout.

Suggested next step: Please clarify if there is a new exit door on grid 16 between grids A5x and A4x. Issue an updated and consistent architectural background to all disciplines to ensure accurate coordination of devices and sprinkler heads in this area.

RFI draft: Please clarify if there is a new exit door on grid 16 between grids A5x and A4x. Issue an updated and consistent architectural background to all disciplines to ensure accurate coordination of devices and sprinkler heads in this area.

Summary: The drawing plan calls out standalone emergency battery lights as 'SIMILAR TO STANPRO SLMC,' specifying Stanpro as the basis of design. However, the specification's Emergency Lighting legend exclusively specifies Lumacell products for all emergency lighting equipment, including battery backup units which are designated as 'LUMACELL MODEL# RG SERIES.' The drawing introduces a different manufactu...

Why it matters: Using a non-specified manufacturer could lead to procurement issues, incompatibility with the building's existing emergency lighting infrastructure, and potential rejection during electrical inspection. If Stanpro SLMC is the intended product, the specification legend needs to be updated to inclu...

Suggested next step: Please clarify the acceptable manufacturer for standalone emergency battery lights. The drawing specifies 'STANPRO SLMC' while the specification Emergency Lighting legend requires Lumacell products (Model# RG Series for battery backup units). Should the standalone emergency ba...

RFI draft: Please clarify the acceptable manufacturer for standalone emergency battery lights. The drawing specifies 'STANPRO SLMC' while the specification Emergency Lighting legend requires Lumacell products (Model# RG Series for battery backup units). Shou...