PT slabs are efficient but demand careful coordination.
In this article
Tendons
Steel cables under tension.
Stressing
Specialized crew.
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Coordination
Sleeves and penetrations.
Safety
Stressing zones.
Later work
Scanning before drilling.
A closer look
PT slabs are common in parking garages and multifamily buildings. The biggest risk comes later, when trades drill for anchors or penetrations. Clear marking, scanning and rules prevent tendon damage.
Where to start
Plan all sleeves and penetrations before the pour and mark tendon zones.
An example
A GC banned drilling without scanning on a PT slab. No tendons were damaged during interior work.
Common mistakes
Uncoordinated penetrations, drilling without scanning and unsafe stressing zones.
What to track
Track penetrations planned and drilling permits.
Questions to ask
Are penetrations planned? Who scans? Do trades know the rules?
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Frequently asked questions
Can you drill into a post-tensioned slab?
Only with great care, after scanning or locating tendons and following engineer requirements. Cutting a tendon can be dangerous and costly.