33 Baker Street

What is the purpose of the structure/project?

 To upgrade a very old building, to accommodate multiple tenants of which the main tenant is Standard Bank.

What was the brief to the Architect? 

To convert the existing building into a contemporary design with a status commensurate with the expectations of Sasol Pension Fund and Standard Bank as a tenant.

Was the project envisaged in steel from the start? If not, why was it built in steel in the end?

The curtain wall application to an existing concrete structure demanded a steel frame to achieve a modulated façade.

Give a brief description of the structural framing. What type of sections were used (e.g. hollow, cellular, I beam etc) and why?

 Mostly I-Beams with angular trusses was used to hold the roof.

Give a brief description of the cladding process (complexity, difficulty, innovation etc).

In view of the fluctuating conditions inherent to the existing concrete structure, it was required that steel substructures be designed which would have sufficient adaptability to address the different conditions whilst being able to achieve a modulated curtain wall design.

Were there any challenges in the fabrication of the project from the Engineer’s design – If yes, please tell? Tell more about fabrication and erection process if it was complex, difficult, innovative etc.

Baker Street at its core was an upgrade of a current concrete building that was to be equipped with new structural steel to accommodate impressive looking glass and facades with paneling on the exterior. Essentially the overall appearance of the building was to be modified. The problem was getting accurate and existing concrete dimensions from site to work with the new Engineering/Architectural changes.

The Engineering drawings which was received had rugged ideas of what was required, in terms of the structural steel and, for a job like this, accurate measurements were of utmost importance.

In the end consultation and coordination between the Architects, Engineers, Glass-and Curved Façade team members, and Sheeting members had to work inwards from the outer most edges of the sheeting and glasswork.

However, the information provided by SVA, with regards to where everything had to be, completed, and getting the required support structures in design form, from the Engineers, allowed the Structural Steel Detailers to reconstruct what was needed from the ground up. The required structural steel did fit in, although tightly in places, but worked. Coordination on this level made everybody sure that everything would accurately fit in the end, especially using the exact three-dimensional (3D) Tekla models as well as proper DWG drawings, where everyone was able to double-check everything on their end. What followed from the new type of coordination with the Structural Steel Detailers leading the way was:  Problems being sorted out quickly in meetings, with nothing left unanswered where after it was checked and updated after meetings between all parties.

What is special/ unusual/ innovative/ aesthetic about the steelwork/cladding in this project?

The steel frame principle allowed sufficient flexibility to achieve a curtain wall cladding accentuated with aluminum solid elements as well as utilizing the steelwork at roof level to support a balcony structure. The essential idea was to achieve a simplicity of structures that could be erected within a limited time.

How did the project team work together (e.g. Contractor involved early, challenges/ease of communication etc.)?

The design demanded a meticulous coordination of the Engineer’ requirements, the curtain wall shop drawings and the detailing of the solid aluminum elements during the pre-contract documentation stage and on-site construction. The coordination of the various disciplines, as well as management of the process on-site, proved to be efficient.

Tons of structural steel used 210 Tons
Structural profiles used Hot Rolled I-sections, Angles & CFLC

 

Project Team

Project Team Role Company
Nominator KRU Detailing CC on behalf of Central Welding Works
Client/ Developer Redefine- Sasol Pension Fund
Architect SVA Architects
Structural Steel Detailer KRU Detailing CC
Engineer Sutherland Engineers
Quantity Surveyor Matla
Project Manager TPM project management
Main Contractor WBHO
Steelwork Contractor Central Welding Works
Steel Erector Central Welding Works
Cladding Manufacturer Hunter Douglas (Fancy Facades)
Cladding Supplier Hunter Douglas
Cladding Contractor Hunter Douglas
Glass Facades Diri Glass (Glass Facades)
Rigging/Cleaning Rails Gravity Access
Photographer, Other submitted images Central Welding Works

BMW H-EMS Roof Lift

All Projects
Factory/ Warehouse
Metal Cladding