Post-tensioned slabs: drilling, anchoring and coring

Before drilling or opening a structural slab, locate post-tension tendons, reinforcement and services and obtain required structural approval.

VERT / GREEN = documenter · JAUNE / YELLOW = vérifier · ROUGE / RED = arrêter/faire valider.

Suspended/post-tension status unknown
Do not drill before drawings, scanning and structural review. Coring planned for plumbing/HVAC
Locate tendons/rebar/services and have the opening approved. Incomplete as-built drawings
Supplement with appropriate non-destructive locating. Approved zone marked
Keep scan, approval and final location.

What the professional checks

Confirm structural system and tendon paths
Approve opening location/dimensions

Official sources

CanadaBuys — exigences de carottage et dalle post-tensionnée

Checked: 2026-08-22

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