Method Statement for Concrete Coring & Cutting

Before commencing any concrete coring and cutting activity on site, the client/consultants must be notified.

All the related documents, shop drawings, method of statements, material approvals, subcontractor’s approvals and test certificates must be approved and readily available on the working location.

Below mentioned tools and equipment shall be arranged.

• Cutting Machine – LP32/TS20
• Coring Machine – DD 200/DD 350
• Hand tools

General HSE Requirements

All employees regardless of position will be responsible for their own personal safety and that of their fellow workers.

This will be reinforced through the induction process and frequent toolbox talks.

Every employee of the company will:

• Understand the company’s safety policy and appreciate their individual responsibility towards safety for themselves, for their co-workers and for 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 abuse of safety devices, equipment and welfare facilities.
• Report any accident, near miss or hazardous condition to 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.

Form works

For the reinforcement concrete walls or slabs where coring and cutting is required, necessary scaffolding/safe working platform will be arranged, for supporting the operator and helper to perform required coring and cutting woks.

Necessary structural resources shall be provided by the main contractor in the line with the marking done on the site.

Sequence of Cutting & Coring Works

Reinforcement concrete wall or slab should be clearly marked by main contractor and approved by the consultant before any cutting/coring work starts.

Verify the availability of necessary scaffolding as per HSE approvals.

Using HILTI coring machine and 6” 152mm Dia core bits, 2 nos. cores will be done at center of each piece for lifting purposes and 1nos. core will be done at corner of each piece to avoid over cutting.

When coring works is done, drilling for fixing the rail support for the cutting machine will be started by using 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 straight line cutting.

The same procedure will be used for cutting vertical and horizontal lines.

Using mobile/tower crane to suit 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 or more cores done in each piece.

When the concrete pieces reach the ground level, it will be carted away outside the site to the approved dumping areas.

The distribution boards connected to the coring and cutting machine should be at least 10 meter away to avoid any water spillage on it.

Normally wall saw uses 400 volt, 63AMP breaker and 3 phase power supply. The coring machine is using single phase power.

In all cases electrical safety must be observed to avoid any electrocution incident.