Table of Contents
What is Concrete Coring and Cutting Method Statement?
Concrete Coring and Cutting Method Statement is a detailed document that outlines the necessary steps, tools, and equipment required for concrete coring and cutting on a construction site.
The article emphasizes the importance of notifying consultants and obtaining necessary approvals before commencing any activity. It also highlights the general HSE requirements that all employees must follow to ensure their own and their co-workers’ safety.
The document describes the tools and equipment required, including cutting and coring machines, hand tools, and scaffolding. It provides a sequence of cutting and coring works, including drilling for rail support, straight-line cutting using hydraulic wall saw systems, and lifting concrete pieces using a mobile/tower crane.
Finally, the document emphasizes the importance of following safety guidelines when operating equipment, including keeping the DB at least 10m away and using the correct power supply.
Tools and Equipment
Before starting any work on the site, the consultants should be notified, and all necessary documents, including shop drawings, method of statements, material approvals, subcontractor’s approvals, and test certificates must be approved and readily available.
The following tools and equipment must be arranged:
- Cutting Machine – LP32/TS20
- Coring Machine – DD 200/DD 350
- Hand tools
General HSE Requirements
All employees, regardless of their position, are responsible for their personal safety and that of their co-workers. This will be reinforced through the induction process and toolbox talks.
They must:
- Understand the company’s safety policy and their individual responsibility toward safety for themselves, their co-workers, and the company.
- Use the correct tools and equipment for the job.
- Use the protective clothing and equipment provided.
- Keep tools and equipment in good condition.
- Inspect tools/equipment for defects before use and report defects immediately to the direct supervisor.
- Refrain from horseplay and abusing safety devices, equipment, and welfare facilities.
- Report any accidents, near misses, or hazardous conditions to their immediate supervisor for correction purposes.
- Obey all posted warning signs.
- Follow instructions from supervisors. If in doubt, ask questions.
- Cooperate with safety personnel.
- Know emergency procedures (siren codes, assembly point, wind socks, etc.).
Formworks
The reinforced concrete walls will have scaffolding/safe platforms that will be placed near the wall, allowing the operator and helper to conduct the required coring and cutting works on the wall.
The main contractor will carry out this application in line with the marking done.
The Sequence of Cutting & Coring Works
Before any cutting or coring work starts, the reinforced concrete walls to be cut should be clearly marked by the main contractor and approved by the consultant.
The reinforced concrete walls will have scaffolding/safe platforms that will be placed near the wall, allowing the operator and helper to conduct the required coring and cutting works on the wall.
The main contractor will carry out this application in line with the marking done.
Using HILTI coring machine and 6” 152mm dia core bits, two cores will be done at the center of each piece for lifting purposes, and one core will be done at the corner of each piece to avoid over-cutting.
Once the coring works are done, drilling for fixing the rail support for the cutting machine will start using the Hilti drill machine and M12 drop-in anchors for straight-line cutting.
After the rail is fixed, the hydraulic wall saw system DLP-32/DS-T32 from Hilti will start the straight-line cutting. The same procedure will be used for cutting vertical and horizontal lines.
Using a mobile / tower crane that suits the required load of the concrete pieces, the cut concrete pieces will be lifted/lowered to the ground by using the steel chain that will be connected to the two cores in each piece.
When the concrete pieces reach the ground level, they will be carted away outside the site to the approved dumping areas.
The DB connected to the machine should be at least 10m away to avoid any water spillage on it. The wall saw uses a 400-volt, 63AMP breaker, and a 3-phase power supply, while the coring machine uses single-phase power.
See Also: Method Statement for Civil Engineering
What are the purposes of coring concrete?
| Purpose of Coring Concrete |
|---|
| Extract a cylindrical sample of the concrete for testing or analysis |
| Determine the compressive strength, density, permeability, and other physical properties of the concrete |
| Inspect the interior of concrete structures for defects, such as cracks, voids, or delaminations |
| Assess the condition of the structure and plan repairs or maintenance |
| Create openings for pipes, wires, or other utilities to be installed in the concrete without damaging the surrounding structure |
| Important technique for evaluating and maintaining concrete structures |
tag: # Concrete Coring and Cutting Method Statement
ref: https://www.osha.gov/sic-manual/1799 – Core drilling for building construction-contractors