From structural calculations to execution06 40 12 51 21
Draagmuur-Concurrent
Red steel beam between dark columns with exposed kitchen services behind.
More space. A considered plan.

Load-bearing wall
removal?

From structural calculations
to professional execution.

An open kitchen. A brighter living room. A better connection. Start with your home, your wishes and a clear plan for the structure.

In view: a steel beam between two columns, before finishing.Explore the photographs ↗
Calculations & drawingsStructural work & steelClear scope & handover
From idea to opening

Space for
your plans.

A complete view of the preparation, structure and finish. Explore the service that fits your next step.

Explore all services ↗
Design example: stair and landing junction
Stair and landing junction

Design example of a finished stair, balustrade and floor edge. The clear opening and finishes are coordinated with your staircase design.

A new connection between floors

Space for
a new staircase.

An opening in concrete or timber, more space for a replacement stair or permanent attic access. Explore the design, preparation and finishing.

Stairwell openings ↗
Front view of a wall opening with a red steel beam, temporary props and a worker.
Load-bearing wall and steel beam

From the adjoining room, you can see the beam above the opening and the masonry at either side. Temporary props remain in the work area; finishing belongs to a later stage.

The work behind the space

A good opening
starts before demolition.

The existing structure determines what your plan needs. Clear drawings and agreed responsibilities connect the design to the work on site.

  1. Understand the building. Compare the records with the existing situation.
  2. Coordinate the structure. Design the permanent solution and temporary support.
  3. Agree the finish. Define the work, checks and handover in writing.
Explore our approach ↗
From drawing to construction

The structure.
Up close.

See beams, columns and temporary support during the work.

Steel beam above a wide opening with temporary props during renovation.
Beam and temporary support

A wall opening up close

The wide wall opening and steel beam are visible together. The props and timber members form part of the temporary support during the renovation.

Side view of a red steel beam and dark column in a home during renovation.
Beams and columns

The beam and column together

This side view shows where the horizontal beam meets the vertical column. The surrounding room and the unfinished floor and wall surfaces reveal how the new structure fits into the existing space.

Red steel frame in an opened internal wall during renovation.
Steel construction

A steel frame in the opening

The steel frame outlines the new opening. The ceiling, walls and floor are still unfinished, leaving the position of the structure clearly visible.

View the photographs ↗
A clear sequence

One project.
Twelve considered steps.

Know who prepares the design, coordinates permissions and carries out the work.

  1. Phase 1

    Prepare the design

    Share your wishes, gather records and assess the existing building.

  2. Phase 2

    Coordinate the work

    Arrange permissions, agree the scope and prepare the temporary support.

  3. Phase 3

    Build and hand over

    Install the structure, complete the checks and agree the final finish.

See the full step-by-step guide ↗
Structural drawing studio

Understand
what carries the load.

Explore beams, frames, columns, bearings and foundations through detailed schematic illustrations.

Existing and proposed room layouts with doors, furniture and a marked structural opening.Enlarge drawing
Structural illustration

Open-plan living: before and after

Two architectural plans show wall hatching, windows, doors and a proposed opening.

Wall opening with a steel beam, masonry supports and an I-section detail.Enlarge drawing
Structural illustration

The opening and steel beam

An elevation shows the wall, floor build-up, bearing zones and symbolic dimensions. A separate section identifies the flanges and web.

Axonometric illustration of a home with a new opening and a steel beam.Enlarge drawing
Structural illustration

The structure in three dimensions

An open cutaway shows the relationship between the kitchen, living space, retained walls and steel beam.

Six steel section types, each shown in cross-section and three dimensions.Enlarge drawing
Structural illustration

Steel sections up close

Compare IPE, HEA, HEB, UPN, rectangular hollow and circular hollow sections. The engineer specifies the series and dimensions.

Three structural principles with walls, steel columns and indicative load paths.Enlarge drawing
Structural illustration

From opening to structural principle

Compare a beam on walls, a beam on columns and a combined arrangement. Supports and the structure below belong to the design.

A portal, a closed rectangular steel frame and a double frame with a middle column.Enlarge drawing
Structural illustration

Portals and closed steel frames

A portal, a closed frame with a lower member and a double frame show different arrangements of members and supports.

Three steel column types with cross-sections and base plate illustrations.Enlarge drawing
Structural illustration

From steel section to column base

H-sections, rectangular and circular hollow sections are shown with separate cross-sections and schematic base plates.

Details of a steel beam supported by a wall, column head and another beam.Enlarge drawing
Structural illustration

How a beam is supported

Explore a wall bearing, a column head and a beam-to-beam connection. Each requires project-specific design and dimensions.

Schematic foundation pad, pile-supported pad and existing supporting construction.Enlarge drawing
Structural illustration

What is below the column?

Sections compare a ground-bearing pad, a pile-supported pad and an existing foundation that requires assessment.

Exploded column base and beam-to-column connection with labelled components.Enlarge drawing
Structural illustration

The parts of a steel connection

An exploded column base and a beam-to-column detail identify plates, anchorage, grout and connection zones.

Choose a topic and enlarge a drawing to explore the details. Schematic illustrations, not construction documents.

Clarity about costs

A quotation
with a clear scope.

Design, steel, access, temporary support and finishing determine the price for your home.

Build your cost profile ↗
Prepare with confidence

Clear answers.
Useful next steps.

Explore the knowledge base ↗
Frequently asked questions

What would you
like to know?

All questions and answers ↗
Can you assess a wall from photographs alone?

Photos help with the first discussion, but they do not establish the complete load path or the condition of hidden construction. The engineer decides what information and inspections are needed.

Do two openings need to be considered together?

Yes, tell the engineer about all planned structural changes. Their effects may interact, even when different contractors carry out the work.

Is partial removal always cheaper?

Not necessarily. Design, access, temporary support and finishing still influence the cost. An itemised quotation shows which parts actually change.

Can I keep space for double doors?

Yes, include the door system and its installation requirements in the brief. The structural opening, finished clear opening and door dimensions must be coordinated.

Which steel beam do I need?

The engineer selects the section and dimensions from the building, loads, span, supports and design requirements. A photograph or opening width alone is not enough.

Ideas for your renovation

Plan the space.
Consider the details.

Read all articles ↗
Preparation

From a room idea to a useful first enquiry

Start with what should change in everyday use: more connection with the kitchen, a wider view or a separate room that can still be closed. A sketch with furniture and walking routes communicates more than an opening width alone.

Read more ↗
Costs

How to compare wall removal quotations

Check whether every quotation covers the same opening, structural design and finish. Separate calculations, drawings, steel, temporary support, installation, protection and waste removal. A lower total can reflect work that another quotation has included.

Read more ↗
Draagmuur-Concurrent

A clear contact
for your plans.

The company behind this website is Multiconcurrent B.V. in Velsen-Noord. Discuss your wishes and agree the scope and responsibilities for your project.

Meet the company ↗

Multiconcurrent B.V.

Starrebosstraat 9
1951 CE Velsen-Noord

Dutch Chamber of Commerce (KvK): 84612657

Company and privacy enquiries: info@multiconcurrent.nl

Your home is the starting point

Find information
for your area.

Explore preparation advice for your town. Execution options and availability are confirmed for your address.

Explore all 100 places ↗
Turn your idea into a clear plan

Your new space
starts here.

Share your wishes, photographs and drawings. Let’s discuss what your home and your plans need.

You are welcome to get in touch while still exploring.

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Structural drawing

Schematic structural drawing

Schematic explanation. Your engineer develops the solution and dimensions for your home.