Avongard crack monitors are used by architects, engineers, builders, home inspectors, government agencies, home owners associations, and lawyers. Avongard are the originators and global suppliers of gauges for the monitoring of cracks in buildings and civil engineering structures. Humboldt provides only the highest quality concrete crack monitors available. Usually the cracks are of little consequence but they may be the first indication of a serious defect. Avongard tell tale standard survey express services. The avongard crack monitoring kit contains all the products needed to set up a.
Should monitor for continued movement is a statement often written in the home inspection report concerning a foundation crack. Also included is an illustrated manual with full instructions and describes best practice. Simply attach the crack monitor to a flat surface by mounting it over the crack with screws, adhesive or epoxy. We use cookies to save your country selection and to power your shopping experience. Fine red crosshair allowing accurate estimation to 0. Engineers can be requested to assess existing cracking in buildings. Crack gauge for concrete crack monitoring humboldt mfg. All the components can be reordered separately in order to replenish the kit.
The opening or closing of the crack can then be recorded on the record sheet supplied with each crack monitor. The distance between the spigots is then recorded on the crack record sheet supplied. Crack monitors concrete testing grainger industrial supply. Crack monitor installation guide for avongard standard, plus and cornermount telltales. Crackmon 4020a concrete crack monitor contractorpak 18pack, includes epoxy adhesive. Use them on various concrete executions, as they track movement on a crack or a flat surface. Measuring cracks with tell tales the helpful engineer.
Cracks may be monitored in corners using avongard corner discs. The caliper crack monitoring kit is supplied in a full kit complete with accessories. The opening or closing of the crack can then be recorded on the record sheet. Once the crack monitor is in position across a crack, any movement will be recorded by the new position of. The telltale is hinged enabling it to be used in internal corners of angles between 70 and 180. Avongard crack width gauge survey express services. The bottom plate is calibrated in millimeters and the overlapping plate is transparent and marked with a hairline cursor. Avongard crack monitoring kit survey express services. He recognised there was a need for a simple but reliable calibrated gauge for the monitoring. When doing this it is important to establish whether the crack is increasing in size. The avongard floor crack monitors measure the settlement of floors relative to a wall or vertical plane.
Avongard supply a range of products for monitoring the movement of cracks and can also provide inhouse courses on crack diagnosis of lowrise buildings. Crack monitor installation instructions avongard telltales download installation guide and crack monitor progress sheet record for avongard. The avongard corner telltale monitors horizontal and vertical movement. The distance between the monitoring datum is measured and recorded on the crack record sheet supplied the rate and trend of movement becomes apparent as subsequent readings are taken. Avongard telltales consist of two plates which overlap for part of their length. Avongard is a uk company who have been trading since the 1970s. Browse through our assortment of concrete crack monitors. With the rissfox mini, you get one of the most advanced miniature data loggers of our time. Each further displacement will be shown by a movement of the cross hairs over the measuring scale 40 x 20mm. The avongard displacement crack monitor consists of three components. The best method for measuring crack movements is by use of a crack. Our crack monitors feature highly accurate scales and a unique pin system, which ensures accurate zeroing of the monitor when. Crack recording sheets are supplied with each unit to allow accurate recording of movement over a period of time.
Supplied with full instructions and crack record sheet. Crack monitoring record, standard telltale crack monitor for the standard and corner telltale 4. I wrote this post to help you understand how to monitor. Record measurements on the accompanying crack monitoring record. The amount and direction of movement is recorded by noting the position of the red cursor line relative to the scale on the plate below. Most buildings crack at some time during their service life. Download installation guide and crack monitor progress sheet record for avongard.
Without these our online store will not function and you wont be able to view the avongard products available in your country. If the crack opens or closes the cursor moves relative to the calibration scale and can be recorded on the record sheet included on all orders. How to monitor foundation cracks a best home inspection. Telltales are precision gauges uses to monitor movement of a crack, horizontal or vertically on a flat surface. Avongard standard crack monitor york survey supply centre.
The kit includes one paircorner telltale, 5 plus telltales, a crack width gauge, 7 packs of fixing screws, plastic padding, record sheets and an instruction manual. The joint founder of the company and now the technical director is a chartered structural and civil engineer and chartered surveyor. Avongard are the originators and global suppliers of gauges for the monitoring. Our selection of monitoring and recording devices offers a range of. In its small shockresistant and watertight housing it combines a high resolution 12bit crack analysis electronic. The h2936a standard crack gauge is a precision device that consists of two plates, which overlap for. Avongard displacement crack monitor precision geomatics. Telltales crack monitoring equipment by avongard kensains. We are a uk company who have been trading since the 1970s. Standard model for monitoring displacements in two directions topbottom leftright. Using tape and a pencil, using glass and epoxy, and. Crack monitor telltale sc100 straight celtic surveys. Monitoring the changes in crack width across a crack. Monitors horizontal and vertical movement across a crack in a corner.
Crack monitor installation guide avongard telltale buildera. The opening or closing of the crack is then recorded on the crack record sheet supplied. Within this convenient shoulder bag, you will find all the tools necessary to provide a holistic assessment of cracks. Avongard corner telltale crack monitor kara company, inc. Other essentials available include an adapter, width gauge, stainless steel discs, digital calipers, and complete kits. Crack monitoring gaugegsr laser tools laser measuring, levelling and layout. Crack monitor installation instructions avongard telltales.
If the crack opens or closes the cursor moves relative to the calibration scale. The avongard corner telltale monitors horizontal and vertical movement across a. Avongard standard telltale crack monitor kara company, inc. This avongard telltale crack monitoring gauge provides monitoring of both horizontal and vertical movement. Deals on avongard corner telltale crack monitor compare. This standard includes guidance on monitoring and evaluating cracks in masonry. Supplied with a reading record sheet may be photocopied. Monitoring cracks using the avongard crack monitor a recommended crack monitor is manufactured by avongard who produces a number of professional crack monitoring systems. York survey supply centre avongard standard crack monitor. The sc100 is an inexpensive simple device for monitoring crack movement consists of two acrylic plates which move independently the bottom. C197 standard crack monitor gauge attach ing instructions.
The gauge should be mounted with the engraved avongard name on the righthand side of the crack. The avongard crack width gauge is specifically designed for this purpose. The basic telltale crack monitoring ruler that monitors horizontal and vertical movement across a crack on a flat surface. C197 standard crack monitor gauge fixing instructions. The pegs are removed after the telltale is fixed across the crack. Monitoring the changes in crack width across a crack helps determine the cause of cracking and what remedial work should be specified. Opening, closing and differential crack movement can be continuously monitored and recorded. Ensure the plate with the engraved avongard name is on the right hand side of the crack. Crack monitor installation guide avongard telltale.
Application example a useful application of using tell tales for crack monitoring. The plastic singleuse recording pad has a target area coated with a white film and convenient blanks to record written data such as. Three different methods are described and include the following. Also included is an illustrated manual with full instructions and describes best practice methods for using the calipers. Avongard provide a crack recording sheet with every instrument to allow the surveyor to accurately record the position of the cross hairs on the opposing grid, building a pattern of movement over a period of time. The client is able to read the telltale and photograph it on a mobile. Monitoring and evaluating cracks in masonry crack monitor. Formed in 1976, avongard recognised there was a need for a simple but reliable calibrated gauge for the monitoring. Included in the kit is a manual with advice on obtaining the best results using the caliper system. The telltale is hinged enabling it to be used in internal corners of angles between 70 and 180 degrees. Please note that avongard crack monitors can be left in place to record.
The ruler is not left on the gauge but is used to measure the relative movement in the two plates. Please note that avongard crack monitors can be left in place to record movements across cracks for. Prior to monitoring the crack, the widths and location of the cracks are measured. Crack gauges can be used to monitor horizontal or vertical movement across a crack on a flat surface. By the helpful engineer on may 24, 2011 in existing building issues.
Crack monitoring record, standard telltale crack monitor. And of course homeowners can use the crack monitor to get a very accurate record. Followed by if continued movement is observed in the crack it should be evaluated to determine if a repair or corrective action is needed. The avongard corner telltale monitors horizontal and vertical movement across a crack.