METHOD STATEMENT FOR INSTALLATION OF ANCHOR BOLTS, SOLE PLATE, AND GROUTING

 

1. SCOPE OF WORK

This method statement outlines the step-by-step procedure for the installation of anchor bolts and sole plates, including grouting between the coping beam and the sole plate, ensuring proper alignment, levelness, and structural integrity.

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2. REFERENCES

• Approved Construction Drawings & Specifications

• DPWH Standard Specifications

• ASTM C1107 – Standard Specification for Packaged Dry, Hydraulic-Cement Grout

• ACI 351.1R – Grouting between Foundations and Bases

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3. RESPONSIBILITIES

Project Engineer

• Supervises execution and ensures compliance with the method statement.

Site Supervisor

• Coordinates the installation crew and ensures materials are available.

QA/QC Engineer

• Ensures correct anchor bolt placement, sole plate leveling, and grout application.

Safety Officer

• Enforces proper PPE and safety procedures.

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4. MATERIALS & EQUIPMENT

4.1 Materials

• Anchor Bolts: As per approved drawing specifications.

• Sole Plate: Prefabricated steel plates with required dimensions and machining.

• Non-Shrink Grout: High-strength, non-shrink cementitious or epoxy grout (e.g., Sikagrout, Fosroc, BASF).

• Shims & Leveling Plates: For temporary leveling of the sole plate before grouting.

• Epoxy Adhesive: If specified for anchor bolts.

• Cleaning Agents: Compressed air, acetone, or thinner for surface preparation.

4.2 Equipment

• Drill Machine (if post-installed anchors are required)

• Torque Wrench (for tightening bolts)

• Leveling Instruments (spirit level, laser level)

• Mixing Equipment (grout mixer, paddle drill, or manual mixing tools)

• Concrete Vibrator (if deep grout application is needed)

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5. METHODOLOGY

5.1 Pre-Installation Preparations

1. Survey & Layout

   • Verify the exact locations of anchor bolts and sole plates as per construction drawings.

   • Mark the positions using chalk or markers.

2. Material Inspection

   • Ensure anchor bolts, sole plates, and grout materials meet project specifications.

   • Check for defects, rust, or damages.

3. Surface Preparation

   • Clean the coping beam surface where the sole plate will be installed.

   • Remove dust, oil, grease, or laitance.

   • Blow out dust from drilled holes (if post-installed anchor bolts are used).

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5.2 Installation of Anchor Bolts

1. For Pre-installed Anchor Bolts

   • Ensure bolts are correctly embedded in the coping beam during concrete placement.

   • Check verticality and alignment using a template before concrete sets.

2. For Post-installed Anchor Bolts (If required)

   • Drill holes using the required depth and diameter.

   • Clean holes with compressed air.

   • Apply epoxy adhesive (if specified) before inserting anchor bolts.

   • Insert bolts and allow the adhesive to cure as per manufacturer’s instructions.

3. Tightening of Anchor Bolts

   • Use a torque wrench to tighten the bolts to the specified torque value.

   • Verify alignment before proceeding to sole plate installation.

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5.3 Installation of Sole Plate

1. Positioning & Leveling

   • Place the sole plate over the installed anchor bolts.

   • Insert shims or leveling plates to achieve the required elevation.

   • Ensure proper alignment using a spirit level or laser level.

2. Temporary Fixing

   • Spot weld or clamp the sole plate in position (if required).

   • Re-check alignment before proceeding with grouting.

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5.4 Grouting Between Coping Beam and Sole Plate

1. Grout Mixing

   • Prepare the non-shrink grout as per manufacturer’s specifications.

   • Maintain the correct water-to-powder ratio.

   • Mix thoroughly to achieve a uniform consistency (avoid excessive water to prevent strength loss).

2. Formwork Preparation

   • Install a grout form around the sole plate to contain the grout.

   • Apply sealant to prevent leakage.

3. Grout Application

   • Pour or pump the grout slowly from one side to avoid air entrapment.

   • Use a rod or vibrator to help the grout flow evenly under the plate.

   • Ensure full bearing contact between the sole plate and the coping beam.

4. Curing of Grout

   • Cover the grout with wet hessian cloth or apply a curing compound.

   • Allow the grout to cure for 24 to 48 hours before removing formwork.

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5.5 Final Inspection & Tightening

1. Check for Voids & Defects

   • Inspect for shrinkage cracks or voids in the grout.

   • Conduct a hammer test to verify grout bonding.

2. Final Torque Tightening

   • Tighten the anchor bolts to the final torque value as per specifications.

3. Surface Finishing

   • Remove excess grout and clean the sole plate surface.

   • Apply protective coating (if required).

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6. SAFETY REQUIREMENTS

• Workers must wear PPE (helmets, gloves, safety goggles, safety boots).

• Handle epoxy and grout with care, using gloves and masks.

• Use proper lifting techniques when handling sole plates.

• Ensure proper ventilation in confined areas during grout application.

• Keep fire extinguishers nearby in case of welding-related tasks.

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7. INSPECTION & TESTING

• Anchor Bolt Alignment Check – Before and after tightening.

• Levelness of Sole Plate – Using precision instruments.

• Grout Strength Test – As per ASTM C109 (compressive strength test at 7 & 28 days).

• Torque Test on Anchor Bolts – Ensure proper bolt tension.

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8. APPROVALS

This method statement shall be reviewed and approved by:

Prepared by:
Mark Arjay M. Arevalo
[Name]

Reviewed by:
QA/QC Engineer
[Name]

Approved by:
Project Manager
[Name]