Masonry Anchor Testing
Testing for Anchors in Brick, Block & Stone Substrates
Masonry anchor testing addresses the specific challenges of anchoring in brick, block, and stone substrates — materials with significantly different mechanical behaviour to concrete. Australia has no Standard for designing post-installed anchors in masonry; the industry defers to EOTA TR 054:2016 (which replaced ETAG 029), and to AEFAC TN05 Volume 4 for Australian guidance on testing anchors in masonry. This absence of local design standards makes site-specific testing the primary basis for establishing anchor capacity in masonry applications.
Masonry substrates present unique failure modes not encountered in concrete. Brick pull-out (tension) occurs when the entire brick unit is extracted from the surrounding mortar joints — the anchor capacity is governed by the shear strength of the mortar bed and perpend joints rather than the brick unit itself. Brick push-out (shear) occurs when a shear-loaded anchor pushes the brick through the opposite face of the wall. These masonry-specific failure modes can produce capacities well below the anchor manufacturer's published values, which are typically derived from testing in concrete or solid substrates.
Unconfined test configuration is recommended for masonry anchor testing because the confined configuration restrains the mortar joint failure mechanism and produces non-conservative test results. In masonry, the failure surface typically propagates along mortar joints rather than through the masonry unit — confined testing prevents this failure mode from developing, making the anchor appear stronger than it will be in service. AEFAC TN05 Vol 4 provides specific guidance on test configuration for masonry substrates.
ATA conducts ultimate load testing as the default for masonry anchor applications, because published design data for anchors in specific masonry types is limited. Australian masonry varies significantly — clay brick compressive strength ranges from 5 MPa to over 100 MPa, mortar grades vary from heritage lime mortars to modern polymer-modified mixes, and block construction ranges from lightweight aggregate to dense concrete units. Testing in the actual project masonry is the only reliable method for establishing the anchor capacity the structure will deliver.
Speak with an RPEQ-qualified structural engineer about this service.
Capabilities
Ultimate Testing in Masonry Substrates
Destructive testing of anchors in brick, block, and stone masonry to determine actual anchor-masonry system capacity. Testing per BS 8539 statistical or simplified methods, with test locations distributed across representative masonry conditions including unit, mortar joint, and unit-joint interfaces.
Proof Testing for Masonry Anchor Installations
Non-destructive proof testing of production anchors in masonry following establishment of design capacity from ultimate testing. Proof load values derived from project-specific ultimate test results rather than manufacturer data developed for concrete substrates.
Masonry-Specific Failure Mode Identification
Identification and documentation of masonry failure modes: brick pull-out (full brick unit extraction via mortar joint shear), brick push-out (shear through wall thickness), mortar joint failure, masonry unit splitting, and combined modes. Failure mode governs design capacity and anchor specification.
Unconfined Test Configuration for Masonry
Default use of unconfined test configuration per AEFAC TN05 Vol 4 recommendations. Unconfined testing allows masonry-specific failure modes (mortar joint failure, brick pull-out) to develop naturally, producing test results that are representative of in-service performance.
Mortar Joint vs Unit Testing
Separate testing of anchors installed in masonry units and at mortar joint interfaces to characterise the capacity difference. Mortar joint anchors typically exhibit lower capacity; testing both locations establishes the governing capacity for design.
Heritage Masonry Assessment
Specialist testing for anchors in heritage masonry — lime mortar joints, handmade brick, sandstone, and rubble masonry. Heritage masonry is typically weaker and more variable than modern masonry, requiring careful test planning and conservative interpretation.
Masonry Type Characterisation
Assessment of masonry substrate type, mortar grade, unit strength class, and wall construction (solid, cavity, reinforced, grouted) to inform anchor selection and test specification. Substrate characterisation is documented in the test report.
RPEQ-Reviewed Reports per AEFAC TN05 Vol 4
Test reports structured per AEFAC TN05 Volume 4 methodology, including masonry characterisation, test methodology, individual results with failure mode classification, statistical analysis, and derived design capacity. All reports reviewed by an RPEQ structural engineer.
Frequently Asked Questions
Why is masonry anchor testing different from concrete anchor testing?
Masonry is a composite material made of discrete units (bricks, blocks, stones) bonded by mortar joints. Unlike concrete, which is relatively homogeneous, masonry has planes of weakness at every mortar joint. Anchor failure modes in masonry are fundamentally different — brick pull-out via mortar joint shear, brick push-out through the wall, and mortar joint failure are common modes that do not occur in concrete. Anchor manufacturers typically derive their published capacities from testing in concrete, not masonry — so manufacturer data may not be applicable to masonry applications. Site-specific testing in the actual masonry is required.
Is there an Australian Standard for anchors in masonry?
No. Australia does not have a Standard for designing post-installed anchors in masonry. AS 5216:2021 covers anchors in concrete only. The industry defers to EOTA TR 054:2016 (which replaced ETAG 029) for European guidance, and to AEFAC TN05 Volume 4 for Australian testing guidance. This means that masonry anchor design must rely on site-specific testing to establish capacity, because there is no code-based design methodology to calculate masonry anchor resistance from first principles.
Why is unconfined testing recommended for masonry?
In masonry, the critical failure mode is often mortar joint failure — the anchor pulls out the entire brick unit by shearing through the surrounding mortar joints. In a confined test configuration, the reaction frame bears on the masonry surface near the anchor, which restrains the mortar joint failure mechanism and prevents brick pull-out from occurring. This produces artificially high test results that do not represent in-service performance. Unconfined testing allows the masonry-specific failure modes to develop naturally, producing conservative and representative capacity data. AEFAC TN05 Vol 4 recommends unconfined testing for masonry.
What masonry types does ATA test in?
ATA tests anchors in all common masonry types: fired clay brick (extruded and pressed), concrete block (dense and lightweight), calcium silicate brick, natural stone (sandstone, granite, basalt, limestone), heritage masonry with lime mortar, and rendered/clad masonry. Each masonry type has different strength characteristics, mortar joint properties, and failure modes — which is why site-specific testing in the actual project masonry is essential rather than relying on generic published data.
Can manufacturer anchor data be used for masonry applications?
Generally not without verification. Most manufacturer anchor data is derived from testing in concrete substrates, and the published ETA capacities are specific to concrete. Some manufacturers publish masonry-specific data in EOTA TR 054 format, but this data covers a limited range of masonry types and may not match the specific masonry on your project. AEFAC TN05 Vol 4 recommends site-specific testing whenever the manufacturer's published masonry data does not cover the exact masonry type, mortar grade, and wall construction present on the project.
Get a quote for Masonry Anchor Testing
Every engagement begins with a direct conversation with an RPEQ-qualified structural engineer. Contact ATA to discuss your project and receive a detailed scope and quote.