buidera CRACKMON 4020A Crack Monitor Installation Guide

: June 7, 2024
: buidera

Table of Contents

Structural Epoxy (Method 1)
Anchor & Fastener (Method 2)
Ordering Information
Related Products
Engineering Specifications
CRACKMON® 4020A CRACK-PROGRESS SHEET
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

buidera CRACKMON 4020A Crack Monitor Installation Guide

SCAN QR CODE WITH MOBILE PHONE FOR LATEST ONLINE DOCUMENTATION AND ORDERING INFORMATION

CRACKMON® 4020A Crack Monitor

Professional Crack Monitor for Geotechnical Evaluations and Structural Forensics.

Structural Epoxy (Method 1)

If surface is damp, allow to dry or use Method 2.
Remove and clean loose debris from crack using stiff bristle or wire brush.
Thoroughly mix Buildera STRUPOXY™ thixotropic epoxy adhesive (Aboweld™ 8101-5) following package directions.
Apply thick 3-4 mm layer of epoxy to backside of both CRACKMON mounting tabs in the vicinity of holes (2×3 cm area). Rough or uneven mounting surfaces may require a thicker application.
Center red crosshair on grid and over crack. Press CRACKMON firmly into place across crack at 1-m (3-ft) typical unit-to-unit spacing. Epoxy should fill holes. Level and adjust to ensure accurate grid alignment prior to initial setup. Hold in place for approximately five (5) minutes until initial bond sets.
Secure CRACKMON in place with duct tape (or similar) for 24 hours until epoxy fully cures. After cure, remove duct tape. Score clear tape on top and bottom edges with a sharp knife or razor blade.
Remove residual clear tape from CRACKMON to allow free motion between each plate.
Note X-Y start position on TRACARD® 3D and/or crack-progress sheet. Inspect movement periodically. Document with phone/camera and CRACKMON 224R Crack Comparator (ACI compliant).

Anchor & Fastener (Method 2)

Remove and clean loose debris from crack using stiff bristle or wire brush.
Adhere CRACKMON 4020-TMP drilling template over crack (template is included with available mounting kit UPC 816291010242, sold separately).
Using a 3/16” (ø5 mm) hammer-drill bit, bore four 1-1/2” (4 cm) deep holes with a cordless hammer drill equipped with an OSHA-compliant vacuum dust collection system (VDCS). Wear eye protection and respirator for added safety. Do not inhale silica dust.
Insert one 3/16” (ø5 mm) A5 Toggler® Alligator® anchor into each hole. Tap flush with a hammer. For best results, use only Buildera-approved anchors.
Fasten CRACKMON with four #6 or #8 x 1-1/2” stainless-steel sheet-metal screws and lock washers. Tighten last turns by hand. Over-torquing screws may inadvertently damage the gauge or shear off the screw head.
Score clear tape on top and bottom edges with a sharp knife or razor blade. Remove residual clear tape from CRACKMON to allow free motion.
Note X-Y start position on TRACARD® 3D or crack-progress sheet. Inspect movement periodically. Document with phone/camera and CRACKMON® 224R Crack Comparator (ACI compliant).
Mount with tamper-resistant screws and epoxy for best results and security.

Ordering Information

Model (Qty)	UPC
CRACKMON® 4020A (1)	816291010259
CRACKMON® 4020A (3-Kit)	816291010006
CRACKMON® 4020A (18-Kit)	816291010013
CRACKMON® Mounting Kit	816291010242
STRUPOXY™ 8101-5 Epoxy	816291010099
TRACARD® 3D ProPak Kit (50)	816291010078
TRACARD® 3D Refills (50)	816291010082

Model (Qty)	UPC
CRACKMON® 224R (1)	816291010112
CRACKMON® 224R (50) Bulk	816291010167
CRACKMON® 5020AV (1)	816291010389
CRACKMON® XL 15040A (1)	816291010440
CRACKPOINT™ 90ti (10)	816291010310
CRACKPOINT™ TR50ti (Kit)	816291010334

Engineering Specifications

Parameter	Specification
Gauge Dimensions	152 mm x 30 mm x 9 mm
Measurement Span	±20 mm (X), ±10 mm (Y)
Discrimination	±0.5 mm (visual)
Material	Proprietary clear acrylic
Temperature Range	-30ºC/+80ºC (-22ºF/+175ºF)
CoE (ASTM D696)	54 µm/m-°C, -30ºC to +30ºC
Mounting Holes	4 per side (2 vert, 2 horiz)
Hole Diameters	4 mm (0.16”) / 5 mm (0.20”)
Fastener Sizes	M3.5/#6 or M4/#8 SS-SMS
Drill Dia / Depth	5 mm (3/16”) / 4 cm (1-1/2”)
Approved Adhesive	Buildera STRUPOXY™
Markings (Ink)	Heavy-duty UV-cured
Traceability	Unique 15-digit serial no.
Country of Origin	Made in USA

CRACKMON® 4020A CRACK-PROGRESS SHEET

CLIENT / PROJECT NAME: ___

EMAIL: _____

PHONE: ____

STREET ADDRESS:

CITY: ____

STATE / POSTAL: __

COUNTRY: ____

COMPANY : ___

ENGINEER / LICENSE NO: _____

CRACK CLASSIFICATION SYSTEM (CCS) : _____
SCAN QR CODE FOR CRACK CLASSIFICATION RESOURCES OR VISIT: www.buildera.com/ccs

COMMENTS:

SCALE: 200%
www.buildera.com/charts

Graphs x-axis

CHART LEGEND| DRY SOIL| DAMP / WET SOIL
---|---|---
Crack Location ID: __| CCS: __| Serial # ____
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __
(YY/MM/DD) ____| X-axis __| Y-axis __