Understanding Concrete Cutting
Proper concrete cutting calculations ensure precise and safe cutting operations.
- Cutting Methods Slab saw: 0-6" depth. Wall saw: 0-24" depth. Wire saw: unlimited depth. Core drill: 1-36" diameter. Chain saw: 0-25" depth. Hand saw: 0-4" depth.
- Blade Selection Green concrete: 10-24 hrs. Cured: diamond blade. Aggregate: soft/medium/hard bond. Depth: blade dia/3. Speed: 2000-3500 surface ft/min.
- Operation Parameters Cut depth: 1/3 slab thickness. Speed: 10-15 ft/min. Water: 2-4 gal/min. Power: 35-65 HP. Overlap: 2" minimum. Step cut: >6" depth.
- Safety Requirements PPE: required. Ventilation: 2000 cfm min. Dust control: wet cut. GFCI: required. Blade guard: mandatory. First aid: on site. Training: certified.
Cutting Guide
Pre-Cut Planning
GPR scan required. Mark utilities. Check reinforcement. Measure twice. Support blocks: 24" O.C. Cleanup plan. Slurry containment. Noise permits.
Execution Details
Start cut: full depth. Maintain line. Cool blade. Clean slurry. Check depth. Monitor power. Relief cuts at ends. Support loose pieces.
Cost Factors
Slab: $2-4/LF. Wall: $12-18/LF. Core: $75-150 each. Wire: $50-75/ft². Mobilization: $200-400. Minimum charge: $500. Rush: +50%.
Quality Control
Edge tolerance: ±1/8". Depth tolerance: ±1/4". Alignment: ±1/4". Overcut: <2". Roughness: <1/16". Spalling: <1/4". Cracks: none.
Important Considerations
- Concrete Type Affects cutting difficulty and time.
- Site Access Impacts equipment selection and cost.
- Utilities Location of embedded services.
- Waste Disposal Proper handling of concrete waste.
Safety Guidelines
- PPE Requirements Proper safety equipment usage.
- Dust Control Managing concrete dust exposure.
- Equipment Safety Proper tool operation procedures.
- Site Protection Protecting surrounding areas.