Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Grouted Column Base Plates and Bearing Plates
…135 unchanged lines
### The Engineer of Record shall be notified before grouting of any base plate designated for special inspection so that substrate preparation and placement can be observed.
−### Special inspection of base plate grouting, where required by the building code or the Contract Documents, shall verify substrate condition, grout consistency, fill completeness, and curing. {note}
+### Special inspection of base plate grouting, where required by the building code or the Contract Documents, shall verify substrate condition, grout consistency, fill completeness, and curing.
# Environmental and Service Conditions {toc}
…38 unchanged lines
### The grout type and grade shall be as shown on the structural drawings and shall be established before base plate fabrication.
−### Cementitious non-shrink grout shall comply with ASTM C1107 and shall be a packaged, dry, prepackaged product requiring only the addition of water at the site.
−
−### Cementitious grout shall not be extended with site-added aggregate except where the manufacturer permits aggregate extension for pours exceeding the product's single-lift thickness limit.
−
−### Epoxy non-shrink grout, where specified, shall be a two-component product mixed and placed strictly in accordance with the manufacturer's instructions.
−
−### Epoxy grout is selected for high chemical exposure, vibration, or very high bearing demand, reaching compressive strengths well above cementitious grout but at higher cost and with strict temperature control; it is not the default for ordinary column bases. {note}
−
```datasheet
label: Grout type
…5 unchanged lines
```
+### Cementitious non-shrink grout shall comply with ASTM C1107 and shall be a packaged, dry, prepackaged product requiring only the addition of water at the site.
+
+### Cementitious grout shall not be extended with site-added aggregate except where the manufacturer permits aggregate extension for pours exceeding the product's single-lift thickness limit.
+
+### Epoxy non-shrink grout, where specified, shall be a two-component product mixed and placed strictly in accordance with the manufacturer's instructions.
+
+### Epoxy grout is selected for high chemical exposure, vibration, or very high bearing demand, reaching compressive strengths well above cementitious grout but at higher cost and with strict temperature control; it is not the default for ordinary column bases. {note}
+
## ASTM C1107 grade and minimum compressive strength shall match the bearing demand the plate imposes.
…31 unchanged lines
### Grout consistency shall be selected to completely fill the grout space without segregation, voids, or bleed.
−### Fluid grout, where used, shall meet a flow cone efflux time of 20 to 30 seconds per ASTM C939 unless the manufacturer specifies otherwise.
−
−### Water shall not be added to a cementitious grout beyond the maximum published for the selected consistency.
−
−### Adding water beyond the published maximum to improve flow reduces compressive strength and increases bleed; consistency is controlled by selecting the right mix, not by overwatering. {note}
−
```datasheet
label: Grout consistency
…6 unchanged lines
```
+### Fluid grout, where used, shall meet a flow cone efflux time of 20 to 30 seconds per ASTM C939 unless the manufacturer specifies otherwise.
+
+### Water shall not be added to a cementitious grout beyond the maximum published for the selected consistency.
+
+### Adding water beyond the published maximum to improve flow reduces compressive strength and increases bleed; consistency is controlled by selecting the right mix, not by overwatering. {note}
+
# Grout Space and Base Plate Configuration {toc}
…2 unchanged lines
### The grout-space thickness, measured from the top of concrete to the underside of the base plate, shall be as shown on the structural drawings.
−### A typical grout space is 1 to 2 in., with 1.5 in. the common case; the minimum is 1 in. and a single lift of standard cementitious grout without aggregate extension is generally limited to 3 in. {note}
−
−### ACI PRC-351.1 relates minimum grout thickness to flow length, recommending at least 1 in. for a 1 ft flow length plus 0.5 in. for each additional foot the grout must travel under the plate. {note}
−
−### The grout space shall not be less than 1 in. at any point under the bearing area unless a thinner space is shown and approved.
−
−### Grout thickness exceeding 3 in. in a single lift shall use an aggregate-extended grout where the manufacturer permits extension, or shall be placed in multiple lifts per the manufacturer's instructions.
−
−### When the grout thickness is not coordinated before fabrication, the fabricator cuts the plate and the anchor rods are set to the wrong elevation, leaving the plate too high or too low; the thickness is therefore fixed on the drawings before fabrication begins. {note}
−
```datasheet
label: Grout space thickness (top of concrete to underside of plate)
…6 unchanged lines
```
+### A typical grout space is 1 to 2 in., with 1.5 in. the common case; the minimum is 1 in. and a single lift of standard cementitious grout without aggregate extension is generally limited to 3 in. {note}
+
+### ACI PRC-351.1 relates minimum grout thickness to flow length, recommending at least 1 in. for a 1 ft flow length plus 0.5 in. for each additional foot the grout must travel under the plate. {note}
+
+### The grout space shall not be less than 1 in. at any point under the bearing area unless a thinner space is shown and approved.
+
+### Grout thickness exceeding 3 in. in a single lift shall use an aggregate-extended grout where the manufacturer permits extension, or shall be placed in multiple lifts per the manufacturer's instructions.
+
+### When the grout thickness is not coordinated before fabrication, the fabricator cuts the plate and the anchor rods are set to the wrong elevation, leaving the plate too high or too low; the thickness is therefore fixed on the drawings before fabrication begins. {note}
+
## Grout holes in the base plate allow grout to fill and vent under wide plates.
…78 unchanged lines
### Where steel shims or wedges are used, the drawings shall state whether they are removed after the grout cures or left permanently in place.
−### Leaving steel shims in place without full grout encapsulation creates corrosion paths and interrupts uniform bearing; the Contract Documents shall state whether shims are removed or left permanently in place. {note}
+### Leaving steel shims in place without full grout encapsulation creates corrosion paths and interrupts uniform bearing; the Contract Documents shall state whether shims are removed or left permanently in place.
### Shims left permanently in place shall be fully encapsulated by grout on all exposed faces.
…154 unchanged lines
default: 1
```