Penetration Review

Penetrations are made by five trades who never read each other's drawings, through assemblies drawn by a sixth. Each hole is closed by somebody, to some standard, with a product chosen on site. The register is the only place all of it comes together, and most projects do not have one.

Workflow

Step 1. Establish what has performance to keep

Ask, in one message:

1. Which assemblies carry a required performance, and what is it? Fire, smoke, acoustic, structural, air, or several at once.
2. Where does each requirement come from? Quote it.
3. Which discipline drawings do you have, and at what revision?
4. What does the specification say about firestopping: who provides it, to what standard, and whether submittals are required per condition?
5. Is there a coordinated model, or are these separate drawings?

An assembly usually carries more than one requirement, and they are closed by different products. A rated wall that is also an acoustic separation needs both, and a firestop that satisfies the rating may not satisfy the acoustic requirement.

Step 2. Build the register, discipline by discipline

Work each discipline's drawings over the assembly plan and log every crossing.

#	Assembly	Requirements	Penetrant	Discipline	Size	Closure	Listing cited	Status

Do not summarise by type. A register saying "all pipe penetrations" is not a register; the listing depends on the pipe's material, size, insulation and the assembly it passes through, and those vary along one wall.

Include the penetrations nobody draws: recessed boxes, back-to-back outlets, control joints, structural connections, anchors, hangers, and anything a specialist trade brings later.

Step 3. Check each one for the three questions together

For every row:

• What performance must be kept? All of the assembly's requirements, not just the fire rating.
• What closes it? A named physical closure. "Firestop" is not a closure; a system is.
• Is there a listing for this exact condition? Penetrant material, size, insulation, annular space, assembly type, and orientation all have to match. Mark cited, not cited, or no known system.

no known system is a real outcome and it means the design has to change. It is found on site otherwise.

Step 4. Find the ones that only appear across disciplines

The value of doing this in one register:

• Two penetrants too close together. Listings specify minimum separation between penetrations, and two trades each drew a hole without seeing the other.
• Back-to-back penetrations through the same assembly.
• Penetrations clustered enough to compromise the assembly structurally or in aggregate.
• A penetration through a structural element that the structural drawings do not show.
• Something crossing a dedicated space or a clearance zone. Point at design-electrical-room.
• A penetration through an assembly that also carries the air barrier. Point at air-barrier-trace.

Step 5. Report

• Counts by status, no known system and not cited first.
• Cross-discipline conflicts, individually.
• Penetrations of structural elements, listed for the engineer.
• Assemblies where the acoustic requirement was not addressed alongside the fire rating.
• What could not be reviewed: missing discipline drawings, drawings at different revisions, a specification that does not say who provides firestopping.

Close with the standing limits: no listing was verified, and the register records what is drawn rather than what will be built.

Step 6. Save

Ask where. CSV, because the register becomes a submittal checklist and an inspection list.

Rules

• Never supply a listing number, a rating, or an acoustic value.
• Never verify a listing. Record whether one was cited.
• Log every penetration individually. Never summarise by type.
• Record all of an assembly's requirements, not only the fire rating.
• Include the penetrations nobody draws.
• Check separation between adjacent penetrations across disciplines.
• Say plainly when there is no known system.

Anti-patterns

• Reviewing the mechanical drawings and calling it a penetration review.
• Logging "typical pipe penetration" for a run of different pipes.
• Recalling a firestop system number.
• Addressing the fire rating and not the acoustic requirement.
• Missing two penetrations too close together because each discipline was reviewed alone.
• Treating a recessed box as too small to matter.
• Accepting "firestop per specification" as a closure.
• Reviewing drawings at different revisions without saying so.

Resources

None. This skill is one file. The register is written at the path you choose.