Method of conducting pullout test on anchor bars and rock bolts number of amendments. In the tests, a servocontrolled rapid loading machine maximum load capacity of 980kn, maximum loading. Our tests are carried out with regularly calibrated test equipment and by expert hilti engineering staff. In general, chance civil construction recommends a minimum fs of 2 for permanent. Figure 1 tower loads for hand calculations test design in general the test was designed following an existing 890 kn rock anchor pullout test report by richard e. Feet positioned to take reaction loads onto adjacent concrete units. Loadings include quasistatic, seismic, fatigue and shock. Anchorage the portion of the tieback, including bearing plates, nuts, and wedges, that is used to transfer load from the structure to a. Finally, previous pull out test research is presented. Deformation of the anchor tested can also be measured to understand the relationship between force and displacement during testing.
The report is specific to the test carried out description item number anchor pull out test contents onsite testing. The standard anchor system has a pull stroke of 2 inches 50mm with an option to extend to 4 inches 100mm. Procedures for testing in shear are covered in appendix 1. Due to the array of unknowns both below and above the surface of any. Bond strength and pulloff testing refer to a test method outlined in astm c1583 and d4541. Ive also seen, on the one parking structure anchor testing i was involved with, that a minimum of 10% was required by the engineer of record. The purpose of this document is to provide background and a frame of reference about.
To test the anchors or to perform an anchor pull test, the bolt is pulled with a hydraulic manifold and the displacement of the head of the bolt is measured concurrently. Many times, contractors may install anchors or rebar into. Anchor test system measuring the anchor strengths in. Anchor systems may be different mechanical anchors or different bond materials or lengths for grouted anchors. Pdf nondestructive testing procedure to evaluate the load. Pull out test on anchor bolt the purpose of the test is to apply a specific tensile load to an anchor bolt in order that the bolt can sustain such test condition for a period of time. Sr357 investigative pullout testing of anchors near corners.
Concrete bond strength, pulloff and anchor pullout testers. Laboratory pullout tests on fully grouted rock bolts and. An astm designation number identifies a unique version of an astm standard. For the test without deformation measurement, maintain the load for at least 2 minutes upon. All equipment and methods used to drill, clean and prepare the holes. Pull out tests for epoxiedanchor holdowns in hardened. For the test with deformation measurement, maintain the load for at least 1. The partial factor for pullout failure is given in the relevant approval documents. Pullout tests on hardened concrete the constructor. Cbi chose two regularly available epoxy anchors, and hired an outside testing firm to perform pulltests on epoxy threaded rods in the rubble substrate.
There are many factors that can affect the strength and durability of eyebolts, anchor bolts, scaffold ties, stud anchors, resin bolts and safety wires, so it is vital that they are regularly checked and pull out tested. The test methods outlined in this document are for the assessment of a single anchor without the influence of a fixture element. Mason cre pure epoxy chemical anchor on site tensile pull out test duration. Onsite testing calculates the design resistance of a base material and can determine which anchor system is right for your project. Anchor deployment ahts sails to the drop anchor point, and then slowly pays out the mooring line to drop the anchor into the target box. Pull out test, services, rebaring work services, kolhapur, india. The loktest system is used to obtain a reliable estimate of the inplace strength of concrete in newly cast structures in accordance. The anchor tester then applies a load with the use of. This test evaluation is done by our extremely trained and competent engineers. Study report sr357 investigative pull out testing of anchors near corners of concrete house foundations formed with masonry header blocks. Anchoring material cure time prior to pullout testing.
Standard test method for rock bolt anchor pull test astm d4435. Study on dynamic pullout strength of anchors based on failure. Engage the pulling rod with the safe ring using the secured hook. Corrosionpedia explains pullout test the durability and strength of anchor bolts, safety wires, eyebolts and other hardware can be affected by various factors.
Before using this manual, the reader should refer to the chapter entitled ground anchor inspectors manual, in the task force 27 report entitled in situ soil improvement techniques, prepared by the subcommittee on new highway materials of the aashtoagcartba joint committee. The pull out capacity based on concrete cone failure published in an eta is limited by a theoretical cap and could be conservative compared to values obtained from testing. In general, for the partial factors for splitting failure and the pull out failure, the value for is recommended. Pull out testing company in the uk for bolts, fixings and anchors. The mungo mhda hollow ceiling anchor put to the test.
Developed for the concrete anchor manufacturers association cama by lee mattis, p. Special inspection guidelines for postinstalled anchors. To calculate the total pull out strength of the entire machine, multiply the force required to pull one bolt out times the total number of bolts. The purpose of the test is to apply a specific tensile load to an anchor bolt in order that the bolt can sustain such test condition for a period of time. What ive usually seen is 2 test anchors in roadway decks just to prove that the contractors procedure works.
Normally performed to establish the strength of fixings that have been. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. The test shall be performed when the bonding agent has cured for 24 hours. Experimental testing anchor locations four locations were available on the concrete slab for testing the performance of the screw anchor holddown bolts. In general, for the partial factors for splitting failure and the pullout failure, the value for is recommended.
Comten pull tester for anchor and adhesion testing. Procedure for site testing construction fixings 2012. Tensile load is applied to the bolt via a hydraulic lift up to the specified design load to verify that neither the joint, the substrate material nor the anchor bolt fails. Onsite testing with rebar pullout test equipments hilti. The lok test system is used to obtain a reliable estimate of the inplace strength of concrete in newly cast structures in accordance with the pullout test method described in astm c900, bs 1881. Hilti provide test evaluation report after the pull out test is done. D4435e1 standard test method for rock bolt anchor pull test. Bolt pullout tests of anchorage body under different.
When its time for an anchor test anchor manufacturers publish a dizzying array of data about their fasteners capacity in various substrates under various conditions. Standard test method for pullout strength of hardened concrete astm c900. In case the pull test cannot be done during the deployment due to the existence of drilling vessel,the alternative installation procedure shall be adopted. This is especially the case when visual inspection is just not enough. Designed to provide recommendations for the safe and. I have not heard of any minimum number of bolts to test. We typically ask for pull tests for anchors in direct tension. Determining load capacity is an inexact science limited by an inexact environment, but carefully conducted testing can provide useful decisionmaking input. Pulloff pullout pulloff or pullout testing generally involves the separation of two secured parts under tension. Test equipment hydraulic jack, mark 4 tester, dpg 100 tester 4.
Guide on design of postinstalled anchor bolt systems in hong. Most experts agree, however, that the best way to determine an anchor s holding power is to set it in a natural seabed and exert a straightline pull from a boat while measuring with a strain gauge the amount of force required to drag or break it out of the seabed. For more information contact you local hilti team and well be happy to help. Onsite testing checks the structural strength of an anchoring system or base material. Standard test method for rock bolt anchor pull test. Pull out testing company in birmingham provide pull out tests, anchor bolt testing for house builders, architects, steel fabrication companies, steel erection companies, schools, access. General test procedures apply a tensile load at least 1. Postinstalled anchor testing the jobsitewhere installer experience can vary dramaticallyis no place to experiment with anchors. Our engineers assert the strength of our anchor fasteners and anchor bolts rebar chemical with the help of sophisticated anchor pull out testing system in the presence of the customer on site. Standard test methods for strength of anchors in concrete. Pull out test, services, rebaring work services, kolhapur.
We adhere to one of the most important codes of practice to affect the pull out testing industry, bs8539 standard. Epoxy anchor bolt testing aci concrete code issues. Anchor rebar pull out test service elantor solutions. Each representative anchor should be tested by pullout test to demonstrate that its pullout capacity is not less than 1. Pull out midheavy anchor tester qualianchor 2006 enable engineers to confirm the holding power of anchors in most wall tie tester mk2 the wall tie tester kit is used for testing all. Our anchor load pull out testing service will provide the answers and help determine the next course of action to take. Figure 16 shows the outline of this test apparatus. When setting the anchor flush with the base material. Testing srs stainless steel anchors for strength when tightening. Icfs provides qualified personnel to perform the tests. Ml series anchor bolt pull out tester operational video serve real instruments co. Thats why we thoroughly test and document the performance parameters and application and installation guidelines for every hilti. Environmental exposures include freezing and thawing, moisture, decreased and elevated temperatures and corrosion. The pullout box is a rectangular parallelepiped 160 mm long, 150 mm wide and 200 mm height.
Target box is a small area around target point where. Australian engineered fasteners and anchor council test and. The anchor fastening technical guide is intended to we passionately create enthusiastic customers and build supplement the hilti product and services catalog with technical information for the designer or specifier. Its often the structural engineers task to identify the most appropriate anchor for the loading demand, the given substrate. This study develops a new relationship between the pullout loadcarrying capacity, p, of concrete anchors and schmidt hammer rebound value. To determine the minimum bolt length required, add the internal thread length of the. Indeed, it is well known that the process of unscrewing that occurs for short embedment. Pull out testing birmingham, anchor, safety, eye bolt.
Our experts at ats are the best when it comes to anchor pull testing. An awareness of the many variables involved can further guide an informed choice of an effective anchoring solution. The main purpose or objective for the use of this test is to measure the performance of the anchor installation, and verify that it will resist the pull out forces. Onsite testing can be carried using a destructive pull out test or a nondestructive proof load test. Active standard astm e488 e488m developed by subcommittee. This type of testing is used to evaluate and provide a qualitative value of coatings applied to a concrete or other substrate surface. This may be to test joints in assemblies of any kind ranging from the. Pull out midheavy anchor tester qualianchor 2006 enable engineers to confirm the holding power of anchors in most wall tie tester mk2 the wall tie tester kit is used for testing all types of remedial wall tie to meet the requirements of dd140. Onsite testing can be carried using a destructive pull. Ghb fall protection inc roof anchor load pull test. The partial factor for pull out failure is given in the relevant approval documents. Mason cre pure epoxy chemical anchor on site tensile pull. Resin anchor testing scaffold ties testing studding testing threaded bar testing wall tie testing. Epoxy anchor bolt testing aci concrete code issues engtips.
Procedure for site testing construction fixings 2012, section 4. Nondestructive testing procedure to evaluate the loadcarrying capacity of concrete anchors. Anchorpile to develop the required design, or working capacity per anchorfoundation. Slowly increase tensile load until desired load is achieved. Pull out test means calculate tensile load of bar by pull hydraulic machine. Hilti provides qualified personnel to perform the tests, which are carried out using equipment that is calibrated regularly. The anchor tester then applies a load with the use of a mechanical screw arrangement acting through a hydraulic load cell, which measures the load directly applied to the anchor. A displacement controlled pullout test was carried out to investigate behavior of progressive failure of reinforced soil structure fig. Michigan department of transportation field manual for. Procedure for site testing construction fixings 2012 procedure for site testing construction fixings 2012 07 12 12 3 2 scope bs 8539 outlines the test regimes number of tests, test load, assessment of results which need to be satisfied to achieve the appropriate objectives. Pull out testing for construction, steel erection and scaffold companies. We give you a written report of the test including test data. Epoxy anchor bolt testing lion06 structural 22 jan 10 10. Includes a pack of 10 disposable discs and 1 reusable disc displays peak force analog version.
The anchored product shall then be pulled from the concrete. Guide on design of postinstalled anchor bolt systems in. The test measures the force required to pull out a previously cast in steel insert with an embedded enlarged end in the concrete. Screw pull out testing in accordance with bre digest 421 measuring the compressive strength of masonry materials.
367 1359 228 1583 325 916 848 1632 725 319 962 1406 1126 1289 1405 1111 1527 714 115 1558 761 1279 85 357 1049 1203 1268 894 984 1309 1349 885 1480 972 250 1141