Engineering approval & permitting before concrete cutting

Your safety comes first - regulation, structural engineering, and safe execution on site.

Why early planning saves lives and money

Diamond concrete cutting is a surgical operation on a structure, not just another renovation task. A structural engineer's sign-off is mandatory for every structural change - that is what protects building stability and occupant safety. Building permits are usually required for facade changes or significant expansions; working without them exposes you to legal risk as well as safety risk. In a protected room (mamad) it matters even more, since any cut can weaken the blast-protection properties set by Home Front Command guidelines. That is why we do not start structural work without a written engineering sign-off, and we walk clients through what the authorities require. Coordinating this up front usually saves you delays later.

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Approval importanceBuilding permitsWorking in a mamadIdentifying elementsWhat the client needs to provideFAQ
Approval importance

Why an "engineer's approval" is a professional obligation, not a recommendation

Many mistakenly think concrete cutting is ordinary renovation work, but in practice it is a structural change. Concrete walls contain reinforcement meshes and massive stresses that hold the building together. Uncontrolled cutting can lead to cracks in the frame, ceiling subsidence, and in extreme cases even collapse.

Engineering review and permitting before cutting: how we prevent risks

The engineer is the only qualified party to determine where cutting is allowed, what reinforcements are needed (such as supporting steel beams), and what the technical constraints are. Even Derech will never carry out structural cutting without a written sign-off from a licensed structural engineer.

  • Load analysis and weight redistribution.
  • Locating concealed pipes and infrastructure inside the concrete.
  • Defining safety radius and execution schedule.
  • Preventing secondary damage to adjacent structures from vibration.
Building permits

When is a building permit or local authority approval required?

The Planning and Building Law (Israel, Section 145) defines which works require a permit. As a rule, any action that changes the facade appearance, affects the structural frame, or alters floor area requires a licensing procedure.

Note: The Permit Exemption Regulations (2014) ease requirements in certain cases, but generally opening a door or window in an external or structural wall is not included in automatic exemption.

Checklist to verify with the local authority:

  • Does the planned opening require a "limited-work permit"?
  • Is there an architectural restriction on the building facade?
  • Is a neighbours' signature required to carry out the change?
  • Does the engineering approval meet the council/municipality requirements?
Note: Licensing requirements vary between authorities. Always consult an architect or supervising engineer before starting the process.
Working in a mamad

Mamad: why it is a different world

The mamad is designed as a single strong unit intended to protect its occupants from blast and shrapnel. Every hole or cut in the mamad's reinforced concrete weakens its protection level. Work in a mamad requires strict adherence to Home Front Command guidelines and the use of standard protective fittings after cutting (blast doors and windows).

Strict policy: We will not carry out cutting in a mamad without an orderly engineering file confirming that the room's protection level is maintained.
Identifying elements

Load-bearing wall, column, beam, and slab: how to identify them and what to do

Load-bearing / supporting wall

A thick concrete wall that transfers the weight of the roof and upper floors to the foundations. Cutting it requires precision and care.

Concrete column

A critical vertical element. Cutting a column without support is an immediate collapse risk. Generally not recommended for cutting.

Beam

A horizontal element carrying the slab. Cutting a beam is a high-risk operation requiring complex engineering solutions.

Slab / floor

Cutting for stairs or light shafts. Requires placing temporary supports from below before cutting.

Before we start

What we ask the client to prepare before execution

So we can arrive and carry out the work in the best possible way, we need your cooperation:

1Engineering documents

A signed cutting plan and a written engineer's approval.

2Permit status

Confirmation that all required permits (where applicable) have been obtained.

3Site conditions

Nearby parking, three-phase power, and water available on-site.

4Safety coordination

Area cleared of people and sensitive furniture near the cutting zone.

Liability, insurance, and client protection

Work is carried out under third-party liability insurance and contractor works insurance, with coverage amounts that vary by project scope. It is worth knowing: work done without engineering approvals can void the policy and expose you to personal liability if the structure is damaged. That is why we do not skip the engineer's sign-off, even when a client is in a hurry.

Frequently asked questions about engineering and permitting

For any cutting in a structural element such as a load-bearing wall, column, beam, slab, or mamad, a structural engineer's approval and supervision is mandatory. For non-structural work, such as cutting an external concrete fence (subject to inspection), the requirement may vary.
A concrete wall typically serves as a structural element carrying the building's loads, while a block wall usually serves as an internal partition. Concrete cutting is a much more complex process requiring precision and approvals due to its impact on building stability.
Yes, as a rule, any change to the external envelope of the building (facade) is considered a change requiring a building permit from the local authority, even if it is a relatively small opening.
If the wall is a load-bearing (structural) wall, this is a structural change. In many cases the law requires a permit for structural changes, and in any case an engineer's approval is mandatory before execution to ensure the change does not endanger the building.
Work in a mamad (residential protected room) is very sensitive. An engineer's approval is required, and it must be verified that the changes comply with Home Front Command standards. In certain cases of opening enlargement, a licensing procedure with the relevant authorities is required.
If plans are unavailable, the engineer will conduct an on-site inspection (sometimes including rebar detection if needed) to determine whether cutting can be performed safely.
Never make assumptions. When in doubt, call in a structural engineer for inspection. Cutting a load-bearing wall without adequate supports can cause immediate collapse or serious cumulative damage.
An engineer's visit and issuing an approval or execution plan typically takes between two days and one week, depending on project complexity and the engineer's availability.
An engineer's approval is a technical certification of structural integrity and execution safety. A building permit is a legal authorisation from the local authority to carry out the change. Usually, to obtain a building permit you will first need a plan signed by an engineer.
The property owner is responsible for obtaining all legally required permits and approvals. Performing work without a permit when one is required can lead to fines, demolition orders, and insurance issues in the future.
We work in full coordination with site managers. We ask to receive the engineer's instructions in writing and to coordinate schedules so the site is ready (electricity, water, area cleared).
Noisy work is restricted to daytime hours under noise regulations. Night work requires a special permit from the local authority and is usually carried out in non-residential buildings or under exceptional coordination.
Yes. If three-phase power is not available on-site, we supply a generator at a daily surcharge.
Work at height requires special safety equipment, scaffolding or lifting platforms, and may increase execution cost due to the added complexity and time.
A crane is required when the cut concrete blocks are too heavy for manual removal or when the work is on a high floor without convenient access for debris removal.
We offer crushing and skip-container removal as an optional paid service. The client can choose to remove the waste themselves or through a demolition contractor.
At Even Derech we are strict about safety and legality. We will not carry out structural work without a signed engineering approval, to protect both you and our crew.
Send us a photo of the wall or floor, state the approximate thickness, geographical location, and whether the engineering approval is already in hand. That way we can give the most accurate estimate possible.
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