Question 1

What is core drilling safety scanning?

Accepted Answer

Pre-core drilling scanning uses GPR to identify what's inside concrete before drilling. This prevents striking rebar, post-tension cables, conduits, and utilities that could cause injury, structural damage, or costly repairs.

Question 2

Why scan before core drilling?

Accepted Answer

Core drills remove large cylinders of concrete. Striking a post-tension cable can cause catastrophic failure. Hitting conduits or pipes causes damage and project delays. Scanning ensures safe, successful coring.

Question 3

How close to cables can you safely drill?

Accepted Answer

Industry standards typically require minimum 3-inch clearance from post-tension cables. We identify cable locations and recommend drill positions with adequate safety margins.

Question 4

What if post-tension cables are in the drill path?

Accepted Answer

We'll identify alternative locations for coring or recommend engineering evaluation if penetration near cables is unavoidable. Never drill through or near post-tension cables without engineering approval and cable depressurization.

Question 5

Do you mark safe drilling locations?

Accepted Answer

Yes, we mark directly on concrete showing the proposed core location, nearby embedded elements, and any warnings. Color-coded markings clearly indicate what lies beneath each area.

Question 6

How much area should be scanned before coring?

Accepted Answer

We scan an area larger than the core diameter - typically 2-3 feet around the proposed location - to ensure no elements will be affected by the penetration and to identify alternative positions if needed.

Question 7

Can you scan during active construction?

Accepted Answer

Yes, we coordinate with construction schedules to scan before cutting crews arrive. We can work around other trades and provide rapid results for time-sensitive construction projects.

Question 8

What size cores require scanning?

Accepted Answer

All core sizes benefit from scanning, but larger cores (4 inches and above) are higher risk because they remove more material and are more likely to encounter embedded elements. We recommend scanning for any structural penetration.

Question 9

Is scanning required for anchor bolts?

Accepted Answer

While anchor bolts are smaller than cores, scanning is recommended for safety and to ensure adequate concrete thickness beyond embedded elements. This is especially important for structural or safety-critical anchors.

Question 10

How long does pre-core scanning take?

Accepted Answer

Scanning for a single core location typically takes 15-30 minutes including documentation. Multiple locations can be scanned efficiently in sequence. We minimize wait time for drilling crews.

Question 11

What is the cost of core drill scanning?

Accepted Answer

Pre-drilling scanning typically ranges from $200-$400 per location for simple scans. Multiple locations, larger areas, or complex structures may have different pricing. This prevents damage costing far more.

Question 12

Can you scan on weekends or after hours?

Accepted Answer

Yes, we accommodate construction schedules including early morning, evening, and weekend scanning. Premium rates may apply for off-hours service. Contact us to arrange scheduling.

Question 13

What depths are scanned for core drilling?

Accepted Answer

We scan the full slab thickness up to our equipment's penetration capability (typically 18-24 inches). This reveals elements throughout the concrete that drilling would encounter.

Question 14

Do you provide documentation for each core location?

Accepted Answer

Yes, we provide scanning documentation including location, scan results, clearances from embedded elements, and any concerns. This supports project records and demonstrates due diligence.

Question 15

What if scanning reveals unexpected elements?

Accepted Answer

We immediately inform the project team and document findings. Alternative core locations are identified, or engineering consultation may be needed for critical penetrations near discovered elements.

Question 16

Can scanning identify slab thickness?

Accepted Answer

GPR can estimate slab thickness by detecting the bottom reflection. This helps verify adequate concrete below proposed cores and identifies unexpected conditions.

Question 17

How do you scan elevated decks?

Accepted Answer

We scan from the top surface of elevated slabs. Access from below (if available) can provide additional information. We work safely on all types of elevated construction.

Question 18

Should every core be scanned?

Accepted Answer

Yes, each core location should be individually scanned. Rebar patterns and embedded elements vary. Scanning one area doesn't guarantee adjacent areas are clear.

Question 19

Can you provide rush scanning service?

Accepted Answer

Yes, we offer priority response for urgent construction needs. Contact us early morning for same-day service when possible. Rush fees may apply for immediate response.

Question 20

What training do scanning technicians have?

Accepted Answer

Our technicians are trained in GPR equipment operation, concrete construction methods, and post-tension systems. They understand both the technology and practical construction requirements.

Question 21

Do you coordinate with drilling contractors?

Accepted Answer

Yes, we work closely with coring and drilling contractors, often arriving just ahead of drilling crews. We understand their needs and provide information in formats that support efficient work.

Question 22

What if the slab is heavily reinforced?

Accepted Answer

Dense reinforcement can complicate scanning but our equipment and techniques handle typical reinforcement patterns. Very dense rebar may limit penetration slightly, but critical elements like post-tension cables remain visible.

Question 23

Can GPR scan through form deck?

Accepted Answer

Metal form deck (common in elevated slabs) affects GPR signals. We can often scan through deck with adjusted techniques, though results may be limited. We'll advise on capabilities for your specific deck type.

Question 24

Is scanning required for structural engineer approval?

Accepted Answer

Many structural engineers require scanning documentation before approving concrete penetrations, especially in post-tensioned structures. Our reports support engineering review and approval processes.

Question 25

What about scanning in existing buildings?

Accepted Answer

We scan concrete in occupied buildings for renovation, maintenance, and retrofit projects. Our equipment is quiet and non-disruptive. We coordinate with building operations for access.

Question 26

Can you determine if concrete is post-tensioned?

Accepted Answer

GPR can identify post-tension cables when present. However, confirming absence of cables requires thorough scanning and may benefit from structural document review. When in doubt, assume post-tensioned.

Question 27

Do you service all of BC for core drilling scanning?

Accepted Answer

Yes, we provide scanning services throughout BC. For projects outside Metro Vancouver, we can arrange site visits or recommend local resources if appropriate.

Question 28

What information helps you quote scanning?

Accepted Answer

Project location, number of core locations, slab type (grade slab vs. elevated), suspected post-tensioning, timing requirements, and any available structural drawings help us provide accurate quotes.

Question 29

How do I schedule core drilling scanning?

Accepted Answer

Contact us at 604-239-9934 or info@Leak.ca with your project details. We can often arrange scanning within 24-48 hours for standard projects and faster for urgent needs.

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