London Construction Magazine coverage filed under BS 8539.
A chemical anchor, also known as a bonded or resin anchor, fixes a threaded rod, reinforcing bar or internally threaded socket into a drilled hole in concrete or masonry using a two-part reactive resin. The resin bonds to both the steel and the wall of the hole, so load is carried along the full embedment length rather than by an expansion sleeve pressing outwards against the base material. T…
BS 8539 anchor testing sample rates are often misunderstood on UK construction sites because project teams may know that anchors need testing, but not who should decide the number of tests, how the test load is set, or why different fixings cannot simply be grouped into one generic percentage. The issue is not only technical. It is also contractual, evidential and safety-critical. A façade bra…
CFA-aligned anchor testing matters under BS 8539 because anchor performance depends on the actual substrate, installation quality, load direction, fixing type and condition of the base material, not simply on a generic proof load applied after installation. The operational risk is especially sharp in London brickwork, where historic facades, refurbished masonry, mixed-age brickwork, lime mortar…
Pull-out testing and proof testing are often used as if they mean the same thing on construction sites, but they answer different questions. Pull-out testing normally establishes or investigates the resistance of an anchor or substrate, while proof testing normally verifies that installed anchors can safely sustain a specified test load without unacceptable movement or failure. For cont…
