Planning
Create a penetration schedule with service, location, size, fall, seal, fire treatment and responsibility. Provide justified spares and close unused openings permanently and correctly.
Emergency preparedness · 18 min
Air, water, power, communications and drainage require defined penetrations. Later core drilling can damage reinforcement, waterproofing and fire separation, so cast-in components are coordinated before concrete placement.
Decision compass
Four questions lead from observation to a clear, safer action.
What needs to be clarified now?
Remember: Observe → assess → choose a safer option → act.

Every later service penetration interrupts structure or waterproofing and must be planned early.
Create a penetration schedule with service, location, size, fall, seal, fire treatment and responsibility. Provide justified spares and close unused openings permanently and correctly.
Check location and restraint before casting; inspect and test for watertightness before backfilling. Dimensioned photographs support maintenance and prevent risky drilling later.
Inspect seals, flexible connections and accessible terminations on schedule. Every new service triggers another interface review.
Decision training
Correct: B. Photographs, plans, specialist checks and a functional test show whether the proposed solution works safely at the actual site.