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Used Inventory » Rock and Recycling Solutions
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Bulk Packaged in 50-Packs for Wholesale, Resale, OEM, and Volume End-Users

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  • 50-Pack (Wholesale/Resale)
    EAN 0816291010167 | UPC 816291010167
  • Individual units (1 Each)
    EAN 0816291010112 | UPC 816291010112
CRACKMON® 224R Crack-Width Comparator Gauge | ACI 224R-01 Compliant (50-Pack)


The Buildera CRACKMON® 224R-50 crack-width comparator is a handy, pocket-sized crack measuring gauge for quick assessment of cracks in reinforced concrete, masonry, drywall and other building materials and structures. Use for periodic inspection or in conjunction with long-term monitoring with CRACKMON Structural Crack Monitors. This version comes shrink-wrapped in bulk packs of 50 pieces for resale or high-volume end users. For individually packaged units, see the CRACKMON 224R.

Features and Benefits

  • Measure crack widths from .004" (0.1mm) to over 2.5" (50 mm)
  • Dual English / Metric scale (0 - 2.5", 0 - 50 mm) with easy-to-read graduations
  • Includes American Concrete Institute crack widths conforming to ACI-224R-1.0
  • Measure differential sag up to +/- 15 degrees from 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
  • Extremely high resolution 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

Engineering Specifications

Range and Resolution

  • Standards Compliance: Includes ACI-224R-01 maximum crack widths for reinforced concrete
  • English Rule Range: 0-2.5 inches in .05" increments
  • Metric rule Range: 0-50 mm in 1 mm increments
  • 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).
  • Angle Measurement (Sag): up to +/- 15 degrees


  • Overall Size: 3.38" x 5" (86 mm x 127 mm)
  • Card Size: 3.38" x 2.13" (86 mm x 54 mm)
  • Nominal Thickness: 0.030" (0.77 mm)

Material Properties

  • Material: Crystal-clear glycol-modified polyethylene thermoplastic
  • 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)


  • Serial Number: Yes - 12-digit unique per card
  • Country of Origin (CoO): Engineered and manufactured in California, USA
  • Warranty: 12 months against defects in materials and workmanship


Used Inventory » Rock and Recycling Solutions
ReCycle - Free download and software reviews - CNET Download