Client & Scope

• Client: Private homeowner / developer

• Project type: Loft conversion and extension

• Services: Structural design of steel frame, foundations and connections

• Location: Brent, London

Key Challenges

• Large extension footprint requiring long structural spans (up to 6m)

• Requirement to maintain column-free internal spaces

• Integration of varying floor levels within the extension

• Ensuring overall lateral stability of the enlarged structure

Structural Solution

An efficient and well-coordinated structural scheme was developed:

• Introduction of three steel portal frames to support long spans while providing overall stability

• Use of cranked beams within the portal frames to accommodate changes in levels and align with the architectural layout

• Full steel connection design, ensuring clarity for fabrication and efficient erection on site

• Careful coordination to maintain open-plan, column-free spaces

• Optimisation of the steelwork to balance structural performance, cost, and buildability

Outcome

• Delivered a robust and efficient structural solution for a complex extension

• Achieved large open-plan spaces without internal columns

• Provided fully coordinated steel and connection details, reducing site queries

• Enabled a smooth and efficient construction process