Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
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title: Post-Installed Concrete and Masonry Anchors
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### Anchors in structures assigned to Seismic Design Category C through F shall be qualified for cracked concrete and for seismic loading (ACI 318 Section 17.10).
−### Anchors resisting sustained tension shall be qualified for sustained load in the applicable ESR.
−
−### Many polyester and standard vinylester systems are not sustained-load listed; check the ESR before specifying these systems where sustained tension governs. {note}
−
−### The Engineer of Record assigns the anchor design path - ductile steel element, anchor capacity governed by a 0.4 reduction on a non-ductile failure mode, or concrete breakout controlled by design - per ACI 318 Section 17.10.5 and 17.10.6.
−
−### This standard does not constrain the design-of-record decision on anchor design path; the Engineer of Record has sole authority to select the governing failure-mode approach. {note}
−
```datasheet
label: Required anchor qualification category
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```
+### Anchors resisting sustained tension shall be qualified for sustained load in the applicable ESR.
+
+### Many polyester and standard vinylester systems are not sustained-load listed; check the ESR before specifying these systems where sustained tension governs. {note}
+
+### The Engineer of Record assigns the anchor design path - ductile steel element, anchor capacity governed by a 0.4 reduction on a non-ductile failure mode, or concrete breakout controlled by design - per ACI 318 Section 17.10.5 and 17.10.6.
+
+### This standard does not constrain the design-of-record decision on anchor design path; the Engineer of Record has sole authority to select the governing failure-mode approach. {note}
+
## Installer Qualification {toc}
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## Base Material {toc}
−### The anchor system shall be qualified by ESR for the specific base material into which it is installed; capacity tables for normal-weight concrete, lightweight concrete, and masonry are separate and not interchangeable. {note}
+### The anchor system shall be qualified by ESR for the specific base material into which it is installed; capacity tables for normal-weight concrete, lightweight concrete, and masonry are separate and not interchangeable.
−### Anchors in hollow CMU shall be adhesive anchors installed with screen tubes per the masonry ESR; expansion anchors shall not be used in the unfilled cells of hollow masonry. {note}
+### Anchors in hollow CMU shall be adhesive anchors installed with screen tubes per the masonry ESR; expansion anchors shall not be used in the unfilled cells of hollow masonry.
### The minimum concrete compressive strength assumed for design shall be stated on the Structural Drawings and shall not be taken below the f'c floor permitted by ACI 318 Chapter 17.
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## Corrosion Exposure {toc}
−### The anchor material and coating shall be selected for the service exposure; carbon-steel zinc-plated anchors are limited to dry interior conditions and are inadequate in coastal, submerged, pool, or aggressive-chemistry environments. {note}
+### The anchor material and coating shall be selected for the service exposure; carbon-steel zinc-plated anchors are limited to dry interior conditions and are inadequate in coastal, submerged, pool, or aggressive-chemistry environments.
### Anchors in exterior, intermittently wetted, or splash exposures shall be hot-dip galvanized carbon steel or stainless steel as the exposure requires.
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## Temperature and Moisture at Installation {toc}
−### Adhesive anchors shall be installed only within the ambient and base-material temperature range listed in the system's ESR, because gel time and cure time - and ultimately bond strength - depend on temperature. {note}
+### Adhesive anchors shall be installed only within the ambient and base-material temperature range listed in the system's ESR, because gel time and cure time - and ultimately bond strength - depend on temperature.
−### Concrete shall have reached the minimum age required by the adhesive ESR before adhesive anchors are installed, typically 21 days; installing into early-age concrete invalidates the capacity tables. {note}
+### Concrete shall have reached the minimum age required by the adhesive ESR before adhesive anchors are installed, typically 21 days; installing into early-age concrete invalidates the capacity tables.
−### Adhesive anchors shall not be installed in water-filled or water-saturated holes unless the ESR lists a wet- or saturated-hole category, because most systems lose 30 to 50 percent of bond capacity in wet holes. {note}
+### Adhesive anchors shall not be installed in water-filled or water-saturated holes unless the ESR lists a wet- or saturated-hole category, because most systems lose 30 to 50 percent of bond capacity in wet holes.
```datasheet
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# Anchor Type and Selection {toc}
−## Anchor type shall be selected from a qualified system in the category required by the load, the substrate condition, and the installation orientation; the families below describe how each develops load and where each fits. {note}
+## Anchor type shall be selected from a qualified system in the category required by the load, the substrate condition, and the installation orientation; the families below describe how each develops load and where each fits.
## Mechanical Anchors {toc}
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## Diameter and Embedment {toc}
−### Effective embedment depth (hef) shall be measured and verified during installation; the installer shall mark or use a depth-stop drill so the hole reaches the embedment the schedule requires. {note}
+### Effective embedment depth (hef) shall be measured and verified during installation; the installer shall mark or use a depth-stop drill so the hole reaches the embedment the schedule requires.
### Embedment shall not be reduced to clear reinforcing or obstructions without the Engineer of Record's written direction, because anchor capacity is roughly proportional to embedment.
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### Minimum edge distance and minimum spacing shall meet the values in the ESR; reduced edge distance triggers concrete-breakout capacity reductions per ACI 318 Section 17.6 that may require a larger diameter, deeper embedment, or supplementary reinforcement. {note}
−### Where full unconfined tension capacity is required without edge reduction, the critical edge distance (cac) of the ESR shall be provided. {note}
+### Where full unconfined tension capacity is required without edge reduction, the critical edge distance (cac) of the ESR shall be provided.
### Anchor locations, edge distances, and spacings are set by the structural design and shall be taken from the drawings.
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## Hole Drilling {toc}
−### Holes shall be drilled with the bit type and diameter the ESR specifies for the anchor; carbide hammer-drill bits and core-drilled holes have different bond and expansion behavior and are not interchangeable without ESR coverage. {note}
+### Holes shall be drilled with the bit type and diameter the ESR specifies for the anchor; carbide hammer-drill bits and core-drilled holes have different bond and expansion behavior and are not interchangeable without ESR coverage.
### Hole diameter shall fall within the tolerance the ESR allows - typically a tight match to the bit nominal for adhesive anchors and a small over-size for mechanical anchors.
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## Hole Cleaning {toc}
−### Holes for adhesive anchors shall be cleaned by the full brush-and-blow cycle the ESR prescribes - typically compressed-air blow, wire-brush, and repeat - because inadequate hole cleaning is the leading field cause of adhesive-anchor failure. {note}
+### Holes for adhesive anchors shall be cleaned by the full brush-and-blow cycle the ESR prescribes - typically compressed-air blow, wire-brush, and repeat - because inadequate hole cleaning is the leading field cause of adhesive-anchor failure.
### The number of air, brush, and air cycles shall follow the system's MPII exactly; the cleaning sequence is part of the qualification, not a field option. {note}
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## Unused, unexpired adhesive cartridges and surplus anchors that the Contract designates as Owner property shall be turned over at closeout with their packaging and lot documentation intact.