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

V14

Systems to check before closing the work

V14 connects envelope, air, fire, structure, water and code instead of treating each project in isolation.

Renovation dependenciesHidden services before drillingCode versions

V16

Advanced diagnostics to cross-check

V16 connects water, soil, climate, safety, materials and seasonal use to existing projects.

Pyrite, pyrrhotite and ochre