Description
224R
Crack-Width Comparator
The BUILDERA CRACKMON® 224R™ economy crack-width comparator is a handy, pocket-sized crack measuring gauge for quick assessment of cracks in reinforced concrete, masonry, drywall, stucco, and other building materials and structures. Use for periodic inspection or in conjunction with long-term monitoring with BUILDERA CRACKMON® Structural Crack Monitors.
Features and Benefits
- Dual US/metric scale (0 – 2.5″, 0 – 50 mm) with easy-to-read graduations
- Includes American Concrete Institute crack widths conforming to ACI 224R-01
- Measure differential sag up to +/- 15° from zero reference plane
- Low temperature-coefficient thermoplastic ensures precise measurements every time
- Uniquely serialized for engineering traceability and measurement repeatability
- Credit-card size fits conveniently in your wallet or shirt pocket
- Back-printed in durable rich black to eliminate parallax and improve contrast
- Ultra-definition printing resolution (0.001″) ensures fine detail and accurate measurements
- Includes Euroslot hanger hole for retail displays and point-of-sale merchandising
- Economical for engineers, inspectors, contractors and property owners
- QR-code ideal for mobile users and operating instructions
- Engineered and printed in the USA from tough, flexible and recyclable clear thermoplastic
Civil, Geotechnical & Structural Forensics
- Airports, bridges, dams, highways, hydroelectric plants
- Commercial and residential buildings, historic monuments
- Foundations, basements, seismic retrofits, preservation
- Industrial plants, petroleum rigs, ships
- Power grid, transmission towers, nuclear reactors
Applications
- Airports, bridges, dams, highways, power plants
- Basements, beams, foundations, retaining walls
- Commercial and residential structures, historic monuments
- Seismic retrofits
- Unreinforced masonry (URM/URB)
ENGINEERING SPECIFICATIONS
Range and resolution
- Standards Compliance: Includes ACI 224R-01 maximum crack widths for reinforced concrete
- Crack Widths (direct measurement): .004 (0.10), .006 (0.15), .007 (0.18), .008 (0.20), .010 (0.25), .012 (0.30), .014 (0.35), .016 (0.41), .020 (0.51), .025 (0.64), .030 (0.76), .040 (1.02), .050 (1.27), .060 (1.52), .080 (2.03), .100 (2.54), .120 (3.05), .140 (3.56)
- English Rule Range: 0-2.5 inches in .05″ increments
- Metric rule Range: 0-50 mm in 1 mm increments
- Angle Measurement (Sag): up to +/- 15°
Dimensions
- Overall Size (including hang tab): 3.38″ x 5″ (86 mm x 127 mm)
- CRACKMON 224R Card Size : 3.38″ x 2.13″ (86 mm x 54 mm)
- Material Thickness: 0.030″ (0.77 mm) nominal
Material Properties
- Material: Crystal-clear glycol-modified polyethylene thermoplastic (PETG)
- Recyclable: Yes
- Hardness (Rockwell): >100 R
- Bendability: Excellent, will not break under extreme abuse
- Temperature coefficient of linear expansion: .000035 in/in/°F (.000051 mm/mm/°C)
Other
- Serial Number: 12-digit unique serial number per card
- Country of Origin (CoO): Engineered and manufactured in the USA
- Warranty: 12 months against defects in materials and workmanship
