Heavy Hollow Cylinder Tester

Hydraulic hollow-cylinder pull-out testing device for medium to very heavy loads — verifying dowels, anchors, chemical anchoring and rebar installed with chemical adhesive on site.

Capacity up to 500 kNHydraulic hollow cylinderMedium to very heavy loadsChemical anchors & rebarOn-site pull-out testingPortable case kit

The Adit pull-out tester family

Choose the right pull-out tester for your load range and testing method.

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Hydraulic hollow-cylinder pull-out testing: the complete guide

Everything you need to know about on-site pull-out testing of anchors and rebar with a hydraulic hollow cylinder — from the principle, through the test procedure, to reading the result. This guide was written by the experts at Adit Ltd., the largest chemical-anchor company in Israel.

What is a hollow-cylinder pull-out tester and how does it work?

The Heavy Hollow Cylinder Tester is a field device that applies a controlled tensile load to an installed anchor, dowel or rebar and measures the resistance it develops. The heart of the kit is a hollow hydraulic cylinder: the anchor being tested passes through the centre of the cylinder, so the pulling force is applied in pure tension, directly along the axis of the anchor.

Because the cylinder is hollow, the tester can grip and pull heavy connectors and reinforcement bars that would not fit a solid ram. This makes it suitable for the medium to very heavy load range, with a capacity of up to 500 kN.

The testing principle:

Hydraulic pressure is raised gradually while the load is read. The anchor is loaded up to the required proof value, or until movement is detected, giving a clear, documented confirmation that the installed anchor performs as specified.

Test procedure with the hollow-cylinder tester

1. Preparation — confirm the anchor or rebar has fully cured, then set the reaction bridge and support legs clear of the anchor so the load is carried by sound base material.
2. Positioning — place the hollow hydraulic cylinder over the anchor and connect it through the centre so the pull acts along the anchor axis.
3. Applying the load — raise the hydraulic pressure gradually and watch the load reading climb toward the required test value.
4. Reading the result — record the load reached and any movement of the anchor. A stable anchor holds the proof load with no measurable displacement.
5. Documentation — log the result for the site quality file, including the anchor type, diameter and the load applied.

Advantages of the Adit hollow-cylinder tester

On-site pull-out testing is the most direct way to prove that an installed anchor is safe. The Adit hollow-cylinder tester brings several advantages to demanding projects:

• High capacity: loads up to 500 kN cover medium to very heavy anchors and reinforcement bars that lighter testers cannot reach.
• True axial pull: the hollow cylinder pulls the anchor along its own axis, so the result reflects the real tensile behaviour of the connection.
• Versatile: tests dowels, anchors, chemical anchoring and rebar installed with chemical adhesive.
• Field ready: supplied as a portable kit in a carrying case, so it can be moved between test points and sites.
• Documented confidence: each test gives an engineer a clear, recordable proof value for the quality file.

Where hollow-cylinder pull-out testing is used

Heavy pull-out testing is called for wherever anchors carry critical loads and the installation must be verified before the structure is put into service. Typical uses include:

• Post-installed rebar connections for continued casting and structural extensions
• Heavy steelwork and equipment baseplates fixed with chemical anchors
• Bridges, tunnels and infrastructure works
• Precast and facade connections
• Quality-assurance sampling of chemical anchoring on site

Why choose Adit Ltd. for pull-out testing?

Choosing the right partner for on-site testing is as important as choosing the anchor. Adit Ltd. — the largest company in the field in Israel today — offers a complete package:

• In-depth engineering support: engineers who help define the proof load and interpret the test result.
• Field experience: agents with over 10 years of experience in anchoring and on-site verification.
• Complete anchoring range: the tester works alongside Adit’s chemical anchoring and rebar systems.
• Available stock and fast supply to any point in the country.

Frequently asked questions