{"id":7366,"date":"2025-10-20T14:06:43","date_gmt":"2025-10-20T14:06:43","guid":{"rendered":"https:\/\/www.raxpower.com\/?page_id=7366"},"modified":"2026-08-12T04:16:09","modified_gmt":"2026-08-12T04:16:09","slug":"ancre-a-double-expansion","status":"publish","type":"page","link":"https:\/\/www.raxpower.com\/fr\/ground-anchor\/double-expansion-anchor\/","title":{"rendered":"Ancre \u00e0 Double Expansion"},"content":{"rendered":"
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Double Expansion Anchor<\/h2>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>
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The Double Expansion Anchor is an internally threaded anchor for medium duty applications in masonry materials such as concrete, brick, and stone. It employs a dual expansion mechanism that ensures full expansion and high gripping power, making it effective in environments where shear loads, side pressure, or vibration are present. The anchor eliminates high stress points, beneficial for fastening into materials of varying or questionable strength.<\/p>\n

Constructed from corrosion resistant Zamac Alloy, the anchor provides resistance to environmental factors. The internally threaded design allows for simple installation and removal, facilitating easy service work and enhancing reliability in diverse conditions. Available in sizes ranging from 1\/4 inch to 3\/4 inch in diameter, the anchor requires specific drill hole sizes for installation, such as 1\/2 inch for a 1\/4 inch anchor.<\/p>\n

Common applications include wall mounted fixtures, railings, and cameras in solid concrete, hollow concrete masonry, brick masonry, and stone. The anchor handles shear loads and vibrations effectively, though it is not recommended for overhead attachments. Job site tests are advised for base materials of inconsistent strength to ensure optimal performance.<\/p>\n

The Double Expansion Anchor has been tested in accordance with American Society for Testing and Materials (ASTM) E488 standards and meets Federal General Services Administration (GSA) Specification requirements. Ultimate load testing has been conducted in concrete with a minimum strength of 3,500 psi, evaluating pullout and shear forces to validate performance and compliance with industry benchmarks.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div>