CRACK MONITOR INSTALLATION INSTRUCTIONS | CRACKMON® 5020AV

Thank you for purchasing Buildera™ CRACKMON® structural crack monitors, the engineer’s choice™. The Buildera CRACKMON® 5020AV provides years of reliable indoor and outdoor endurance. Follow this installation guide and all safety precautions to ensure a fail-proof installation. Always wear eye protection and gloves when using power tools and structural adhesives.

 

Anchor & Fastener (Method 1)

  1. Clean and remove loose debris from crack using stiff bristle or wire brush.
  2. Bore four 1-1/4” (3.2 cm) deep holes using a cordless hammer drill and 3/16” (ø5 mm) concrete bit. Blow out debris from hole. Use eye protection!
  3. Insert one 3/16” (ø5 mm) A5 Toggler® Alligator® anchor into each hole. Tap flush with a hammer. For best results, do not use any other anchor.
  4. Fasten CRACKMON® with four #6 (M3.5) or #8 (M4.2) x 1-1/4” stainless-steel flat-head sheet-metal screws. Over-torquing screws may inadvertently damage the gauge or shear off the screw head.
  5. Tighten last turns by hand. Remove four (4) plastic alignment pins from CRACKMON® to allow free motion.
  6. Note X-Y start position on Buildera TraCard® 3D or progress sheet. Inspect movement periodically. Document with phone/camera and CRACKMON® 224R Crack-Width Comparator (ACI compliant).
  7. Mount with tamper-resistant screws and epoxy for best results and security.

Structural Epoxy (Method 2)

  1. If surface is damp, use Method 1.
  2. Clean and remove loose debris from crack using stiff bristle or wire brush.
  3. Mix approved Buildera StruPoxy™ adhesive or Aboweld 8101-5 epoxy following directions on package.
  4. Apply 1-2mm layer of epoxy to backside of both CRACKMON® mounting tabs in the vicinity of holes (2 cm x 3 cm area). Rough or uneven mounting surfaces may require a thicker application.
  5. Press CRACKMON® firmly into place across crack at 1-m (3-ft) typical unit-to-unit spacing. Epoxy fills holes.
  6. Center red crosshairs on grid and over crack. Level and adjust to ensure accurate grid alignment prior to initial setup. Hold in place for approximately five (5) minutes until initial bond sets.
  7. Secure CRACKMON® in place with duct tape for 24 hrs until epoxy cures.
  8. After curing, remove duct tape. Remove four (4) plastic alignment pins from CRACKMON® to allow free motion.
  9. Note X-Y start position on Buildera TraCard® 3D or progress sheet. Inspect movement periodically. Document with phone/camera and CRACKMON® 224R Crack-Width Comparator (ACI compliant).
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