Mechanical anchors are proprietary anchor bolts which are installed into existing concrete surfaces. They include some kind of mechanical device which anchors the bolt into a hole drilled into the concrete. The CivilWeb Concrete Anchorage Design Spreadsheets can be used to complete all the required calculations for mechanical anchors in accordance with BS EN 19922-4.
There are a great many different types available, some of the main types are illustrated below.
Mechanical Anchors in Tension - Design Verifications Required
The following design verification checks are required for mechanical anchors according to BS EN 1992-4. All these checks can be completed using the CivilWeb Concrete Anchorage Design Spreadsheet. Follow the links below for detailed explanations of how the spreadsheet calculates each design check.
These verifications are also shown in the below table.
Mechanical Anchors in Shear - Design Verifications Required
The following design checks are required for mechanical anchors under shear loading;
- Steel Bolt Failure in Shear Without Lever Arm
- Steel Bolt Failure in Shear With Lever Arm
- Concrete Edge Failure
- Concrete Pryout Failure
These verifications are also shown in the below table.
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