Field Notes
Baseplate grout records before equipment set
A useful baseplate grout packet ties the product, surface prep, water, temperature, placement, cure, and release decision together before the base is hidden.
Direct answer
A baseplate grout record should prove which equipment base or plate was grouted, which approved grout product and lot were used, what the foundation and steel surfaces looked like before placement, how the forms and vents were set up, how each batch was mixed, what the temperatures and working-time window were, how the grout was placed under the plate, how curing was protected, and who released or held the base before the next crew set, tightened, aligned, or started equipment.
The packet has to be finished before equipment set because the best evidence is visible only for a short time. The bags, lot numbers, water containers, thermometer, forms, headbox, vent holes, underside access, grout shoulders, witness, and placement sequence are all present during the work. After the base is loaded or buried inside an equipment lineup, the same question becomes a dispute about memory.
Use this as documentation guidance only. The approved grout submittal, current product data sheet, project specification, equipment manufacturer, responsible engineer, owner requirements, and qualified witness control product selection, installation, cure, and release.
Why the packet belongs before the equipment set
Baseplate grout is not cosmetic patching. ACI describes grout between foundations and equipment bases as the load-transfer material between the base and the foundation. That means the record should be strong enough for someone later to understand how the transfer surface was prepared and released.
The risky moment is the handoff. The concrete crew may think the grout pour is complete. The millwright crew may be waiting to set or align equipment. The superintendent may be trying to clear a room for startup work. If the record is thin, everyone moves forward with a hidden condition that cannot be checked without delay, demolition, or a nonconformance report.
A good packet creates a release gate. It does not say grout poured and walk away. It says the approved product was used, the surface and forms were ready, the batches stayed within the data sheet, placement was witnessed, cure protection was started, and the responsible person either released the base or wrote a hold.
Anchor the record to the plate and product
Start with identity. Record the equipment tag, baseplate number, foundation mark, gridline or room, drawing reference, specification section, approved grout product, product data sheet date, bag or kit lot numbers, shelf-life check, and quantity staged. If the plate geometry or grout gap drove the order, attach the takeoff or calculation that shows the length, width, gap, shoulder, chamfer, headbox allowance, waste, and batch count.
Keep the approved product separate from the product that happened to be in the gang box. The packet should make clear whether the installed grout matched the submittal and whether any substitution, aggregate extension, temperature adjustment, or alternate consistency was approved before placement.
For bag yield, do not rely on a round number from memory. Manufacturer data sheets publish product-specific yield and water ranges, and different grouts are not interchangeable. The record should show which yield value the crew used and how many unopened bags remained after placement.
Surface, forms, and access evidence
The strongest record is made before mixing starts. Photograph or witness the concrete bearing surface, steel underside, anchor rods, sleeves, blockouts, forms, headbox, vent holes, grout holes, and access path. The note should say whether the concrete was clean, sound, roughened, and prepared as required by the project and product data sheet. If the grout requires saturated surface-dry concrete, the packet should show that there was no standing water when placement began.
Forms are part of the evidence. Record that they were braced, sealed, high enough for the required head, and tight enough to prevent grout or water loss. If the placement depends on vent holes, grout holes, a headbox, or one-side flow, show that setup before the pour starts.
Steel surfaces matter too. The underside of the baseplate, rails, or soleplates should be documented as clean and ready under the governing product instructions. If leveling screws, shims, wax, bond breakers, or isolation details are part of the approved method, write them down before they disappear inside the final condition.
Batch water, temperature, and working-time log
Most bad grout records are weak at the mixer. They list a product name but do not show water quantity, batch time, mix time, temperature, or whether the grout was still inside its working window when placed.
The field log should identify the water source, measured water per batch, mixer type, batch size, bag count, batch start time, mix completion time, placement time, air temperature, substrate temperature, product temperature, and any heating or cooling control used. Do not write mixed per bag when the issue later may be excess water, expired material, cold substrate, hot weather, or a delayed batch.
The packet should also show what did not happen. If the product data sheet prohibits retempering, added sand, added cement, or unapproved admixtures, the record should say none were added. If the project allowed an adjustment, the record should name who approved it and what instruction controlled it.
Placement evidence that proves the underside was filled
The record should follow the grout from mixer to plate. Note the placement side, headbox level, whether the grout advanced continuously, where it appeared at vents or opposite edges, and whether leaks, blocked vents, or cold joints were observed. Photos are useful when they show flow at the outlets, not just a finished shoulder after everything is cleaned up.
If the method allows rodding, chain assistance, pumping, dry packing, vibration, or grout-hole filling, record who performed it and where. If the method does not allow it, do not write a vague note that makes reviewers wonder whether the grout was disturbed after it started to set.
A good placement record is not a guarantee that every inch is perfect. It is proof that the crew followed a visible, witnessed sequence and that any issue was handled before the next crew loaded the baseplate.
Cure and release hold point
The packet is not closed when the grout stops moving. Record the cure method, exposed surface protection, wet cure or curing compound, temperature protection, start and end of cure watch, and any required test or time-strength evidence. If the product data sheet or engineer sets a load-bearing time, trimming time, form-removal time, or minimum temperature hold, put that hold point in the packet.
The release note should be explicit. It should say whether the base is released for equipment set, released only for a limited next step, or held. It should name the person who made that call and the evidence used: elapsed time, temperature log, product data sheet, cube results if required, engineer direction, owner witness, or equipment manufacturer requirement.
This protects the next crew. A millwright or equipment vendor should not have to infer from a finished grout shoulder that the base is ready for alignment, anchor tightening, vibration, startup work, or acceptance.
Minimum packet
Use the project form first. Add a short packet only where it clarifies the required report, submittal, or inspection record.
| Record item | Field detail | Why it matters |
|---|---|---|
| Base identity | Equipment tag, baseplate ID, foundation mark, gridline, drawing, spec section | Connects the grout record to the exact base |
| Approved product | Manufacturer, product, data sheet date, submittal, lot numbers, shelf-life check | Shows the installed material matched the approved material |
| Quantity | Gap, shoulder, headbox, waste factor, bag or kit count, leftover bags | Explains why enough material was staged |
| Surface prep | Clean and sound concrete, roughening, SSD or no standing water if required, clean steel underside | Preserves evidence hidden after placement |
| Forms and access | Bracing, seal, headbox, vents, grout holes, pour side, access path | Helps prove the placement setup could fill the void |
| Batch log | Water quantity, mixer, bag count, mix time, placement time, temperatures | Shows each batch stayed inside the product rules |
| Placement | Flow direction, outlet evidence, leaks, rodding or pumping if allowed, photos | Captures what happened before the grout was covered |
| Cure and release | Cure method, temperature protection, elapsed time, test evidence if required, released or held | Controls the handoff to equipment set or alignment |
Before equipment set checklist
- Confirm the approved grout product, data sheet, lot numbers, and shelf-life check are in the packet.
- Confirm the equipment tag, baseplate ID, foundation mark, and drawing reference are readable.
- Attach the quantity takeoff or bag count used for staging.
- Photograph or witness concrete prep, steel underside, forms, headbox, vents, and grout holes before mixing.
- Record substrate, air, product, and water temperatures before the first batch.
- Record measured water, bag count, mixer, mix time, batch start, and placement time for each batch.
- Record whether any retempering, added material, aggregate extension, or consistency change was approved.
- Record placement direction, flow evidence at outlets, leaks, blocked vents, and corrections.
- Start the cure log and record the required hold point before load, tightening, alignment, or startup.
- Write the final disposition: released for equipment set, limited release, or held pending direction.
Weak and strong grout notes
Weak note: baseplate grouted, ok to set.
That note does not identify the product, lot, surface condition, water quantity, temperatures, form setup, placement sequence, cure protection, or release authority.
Stronger note: pump P-204 baseplate at grid C-7 grouted with approved cementitious non-shrink grout, product and lot numbers recorded from unopened bags. Concrete surface and steel underside witnessed clean and prepared before forms were closed. Forms sealed with headbox on west side and vent holes open at east side. Batch log records measured water, bag count, mix time, substrate and air temperature, and placement time. Grout flowed from west to east and appeared at the east vents before final topping. Exposed grout protected for cure. Base held until the product data sheet cure interval and project witness release are complete.
The stronger note is useful because it tells the next reviewer what was checked, what was installed, what was seen during placement, and why the release decision was made.
Common mistakes
The first mistake is treating the grout bag as the record. A bag photo helps, but it does not prove the lot, shelf life, water, temperature, or placement sequence.
The second mistake is photographing only the finished shoulder. A finished shoulder may look clean while the underside evidence is gone. The packet needs pre-placement and in-placement proof.
The third mistake is losing the batch clock. If the batch sat too long, was retempered, or was placed outside the temperature window, the finished grout may not tell the story.
The fourth mistake is releasing the base without a hold point. The equipment crew needs a clear released, limited release, or held status before they set, tighten, align, or start work.
Specification and safety limits
This field note is not a grout design, equipment-foundation design, cure approval, bearing-capacity decision, test method, product substitution, or authority to set equipment. Qualified personnel, the adopted project documents, manufacturer data sheet, equipment maker, responsible engineer, owner, and authority having jurisdiction control the work.
Do not use this checklist to bypass PPE, silica or dust controls, chemical handling rules, lifting plans, lockout, pinch-point controls, hot-work controls, confined-space rules, traffic controls, environmental controls, or site-specific safety procedures. The record helps preserve the decision. It does not replace the decision authority.
Sources checked
- ACI 351.1R-12 preview, grouting between foundations and basesUsed to frame baseplate grout as load-transfer work between equipment bases and foundations.
- Five Star Products, Five Star Grout technical data sheetUsed for product, machinery support, yield, surface preparation, formwork, mixing, and placement documentation themes.
- Sika USA, SikaGrout-212 product data sheetUsed for machine and column baseplate use, anchor rod use, storage, standards, and placement-consistency context.
- Sika USA, SikaGrout-928 product data sheetUsed for precision load-bearing grout, equipment examples, temperature range, working time, and jobsite testing cautions.
- Euclid Chemical, NS Grout technical data sheetUsed for machine-base, column-baseplate, generator, pump, compressor, anchor-bolt, yield, and shelf-life documentation points.
- Euclid Chemical, Cementitious Grout Application GuideUsed for pre-job meeting, temperature, surface preparation, correct mixing water, placement timing, and no added sand or cement themes.
- Dayton Superior, Sure-Grip High Performance Grout technical data sheetUsed for clean contact surfaces, SSD/no standing water, sealed forms, temperature, curing, PPE, and no retempering/additive themes.
- ITW Performance Polymers, Epoxy Grout Installation Bulletin 1600EUsed for foundation cleaning, machine-base rail or soleplate cleaning, leveling-screw treatment, grout holes, vent holes, and headbox context.