GPR Services · Metro Vancouver
Post-Tension Cable Mapping in Delta, BC
Cutting a live PT cable releases tonnes of force instantly. GPR maps every cable before any coring, cutting, or anchoring on a post-tensioned slab. Serving Delta and the Metro Vancouver region with certified technicians, non-invasive methods, and insurance-ready documentation — since 1999.
Free phone consult · No pressure · Mon–Sat 8am–6pm PT
Delta ground conditions & what they mean for GPR
Local geology: Delta sits on Fraser delta silts in Ladner/Tsawwassen lowlands, till ridge through North Delta. Lowland silts behave like Richmond — shallow water table, limited depth; the North Delta till ridge scans conventionally. Farm drainage networks add target density.
Local building stock: Agricultural parcels with decades of private piping, Tsawwassen slab-on-grade subdivisions, and port-industrial lands.
Common post-tension cable mapping work in Delta
- Farm drainage and irrigation mapping
- Slab-on-grade leak detection in Tsawwassen
- Port-area utility locates
- Pre-coring on PT slabs
- Anchor and dowel layout
- Renovation openings
How the Delta site visit works
- 1
Identify PT construction
Building age, span, and slab profile flag PT likelihood; visible anchor pockets at slab edges confirm it.
- 2
Scan the work zone
Every planned core, cut, or anchor location is scanned with the 1.6 GHz antenna; cables, rebar, and conduits are distinguished by depth and spacing signatures.
- 3
Mark safe windows
Cable positions go on the slab in paint; safe penetration windows are marked between them.
- 4
Document
Scan imagery and a marked layout drawing — your record that due diligence preceded the drilling.
Delta questions, answered
What actually happens if a PT cable is cut?
A tensioned strand carries roughly 15–20 tonnes of force. Cut it and the strand can rupture through the slab edge or eject anchor hardware at lethal speed — and the slab loses design capacity in that bay. Repairs run tens of thousands. The scan that prevents it takes under an hour per zone.
Which BC buildings have post-tensioned slabs?
PT became common in BC towers and parkades from the early 1970s onward. Most highrise residential and commercial floors poured since then are candidates — assume PT until a scan or structural drawing proves otherwise.
Can you tell cables from rebar in the scan?
Yes — PT cables run in draped profiles at distinctive spacings and depths, while rebar sits in regular flat mats. An experienced analyst separates them reliably, and we mark them differently on the slab.
Do you provide clearance letters for contractors?
We provide a scan report with marked imagery and safe-window documentation. Contractors and building managers use it as the diligence record for permits and insurance. Final drilling authority always rests with the structural engineer where one is engaged.
How deep can GPR scan in Delta?
Delta sits on Fraser delta silts in Ladner/Tsawwassen lowlands, till ridge through North Delta. Lowland silts behave like Richmond — shallow water table, limited depth; the North Delta till ridge scans conventionally. Farm drainage networks add target density. We select antenna frequency to match — and where local ground limits radar depth, we pair GPR with electromagnetic locating, acoustic methods, or tracer gas so the survey objective is met regardless of soil conditions.
Do you actually work in Delta, or dispatch from elsewhere?
Delta is part of our standing Metro Vancouver service area — the same certified technicians and equipment that cover the rest of the region. Scheduling is typically within 24–72 hours, with same-day response often possible during business hours (Mon–Sat, 8am–6pm Pacific).
What does post-tension cable mapping cost in Delta?
Pricing matches our province-wide structure — no regional premium for Delta. Most residential-scale work falls in the $350–$1,200 range depending on scope; commercial and multi-site projects are quoted after a free phone consult. Call 604-239-9934 and we will give you a tight estimate in five minutes.
Other GPR services in Delta
Core Drilling Safety Scanning in Delta
Every core hole cleared before the bit touches concrete — rebar, PT cables, conduits, and in-slab pipes mapped at each penetration point.
View serviceConcrete Scanning in Delta
The full picture inside any slab, wall, or beam — rebar, PT cables, conduits, voids, thickness — imaged at 1.6 GHz before a single cut.
View serviceRebar & Conduit Locating in Delta
Know exactly what's inside the concrete — rebar mats, electrical conduits, embedded pipes — before you drill into any of it.
View serviceParking Garage Slab Scanning in Delta
Parkade decks fail from the inside — chloride-corroded rebar, delamination, membrane leaks. GPR maps the deterioration before the spalling starts.
View service← All about post-tension cable mapping·All GPR services·GPR guide
Post-Tension Cable Mapping near Delta
Need post-tension cable mapping in Delta?
Free phone consult with a certified GPR technician — we will tell you whether a survey is warranted and quote it in five minutes. No pressure.