Park Lane West is a new premium grade commercial development in Menlyn. At the center of the 7 storey building there is 26m long by 17m wide atrium skylight which brings natural light into the building

Architectural Brief

The architectural brief was to create a modern skylight, with lightweight steel members and a very clean geometry, that would bring the right balance of heat and light into the atrium below. Due to the need for a lightweight structure which could support large glass lites, steel was the obviously material of choice. 


Structural Framing

Rectangular hollow sections were selected for the main beam so concealed connections. In addition, since the structure was designed as a braced three-pin pitched roof, the hollow sections efficiently carried the bending and compression forces. Small diameter round tubes were used for longitudinal apex bracing.

Due to the accuracy of the steelwork and efficiency of the glazing installation team, up to 16 glass panels could be installed in one day. Ie, this equates to the weight of the full steel structure in glass panels per day.

The low pitch ridged roof consisting of neatly fabricated hollow steel sections and large glass panels created a simple but bespoke looking skylight.

Cladding

To reduce the number of steel beams, large point supported glass panels were used. Each panel was 2.2m wide x 3.3m long and weighed approximately 350kg.

Challenges

Since all the glass lites were fully tempered and prefabricated the steelwork needed to be installed to a very high degree of tolerance to ensure each glass lite would fit. Extensive QAQC checks were carried out both in Tass’s factory and onsite before the cladding was installed. 

How does this project demonstrate the benefits of steel as a material?

High yield strength of the S355 tubes enabled small beams to be used while the hollow sections enabled neat hidden connection details. In addition, due to the stringent deflection requirements of the glass, both during installation and long term, the high stiffness of structure enable the joints between each glass panel to be sealed with a neat strip of silicone only. No mullions were required.

How did the project team work together?

LEAF Structures worked very closely with the professional team, as well as the general contractor, to come up with a solution that met the architectural intent, budget, and site constraints. During the design phase, several structural and cladding solutions were developed and priced so the client could pick their preferred option.

Project motivation editorials are provided by the project nominator. If any technical details, company names or product names are incorrect, please notify the SAISC so that the error can be corrected.

PROJECT OVERVIEW
Physical address of the project 

 

Street Address

Town

Province

  

 

97 Amarand Ave,

Waterkloof Glen,

Pretoria, 0010

Google Maps link  
STRUCTURAL STEELWORK
Completion date of steelwork October 2019
Completion date of full project March 2020
Tonnage and steel profiles used 5.2 tons. CHS 200x100mm

CLADDING (If applicable)
Completion date of cladding December 2019
Cladding profile/ type used Point support fully tempered laminated glass
Cladding area coverage 460sqm
Cladding tonnage 24 tonnes
Project Team Role Company
Nominator LEAF Structures
Client/ Developer Menlyn Main
Architect Boogertman and Partners
Structural Engineer LEAF Structures
Engineer  
Quantity Surveyor  
Project Manager  
Main Contractor Barrow Construction
Steelwork Contractor Tass Engineering (Pty) Ltd
Steel Erector  
Cladding Manufacturer LEAF Structures
Cladding Supplier LEAF Structures
Cladding Contractor LEAF Structures

If you were a part of this project, and your company details are incorrect or missing – please notify the SAISC so that the error can be corrected.