Sky City – 17000m2. Along with the load of the roofs, the steel structure also supports the vast amounts of solar panels fixed with specially made aluminium steel brackets. The use of compatible steel products ensure that the lifespan of the building materials are not affected due to bimetallic corrosion processes.

Benefits achieved by using steel construction

As locally manufactured steel products are readily available the project could be completed in a timely fashion and the versatility of steel flashings meant that the design features could be rounded off and sealed to be watertight.

Aesthetic appeal

The big facades and overhanging canopies are a showcase of what can be achieved using steel cladding and structural steel materials.

Walking around the mall at Sky City it is evident that steel is no longer only a cold material used for it strength but also its attributes as a design feature.

Environmental/ Sustainability consideration

Steel is 100% recyclable and is an environmentally friendly product.

Innovation in Design Fabrication or construction

The large roof design along with the long spanning and good load bearing properties of ProLok 700 roof sheets accommodate the solar panels on the roof that assist with the ever growing demand for alternative power sources.

Technical process required for realizing the project

Due to various roof angles and heights, not only was the support systems and sheeting important, but more important was the special flashing designs to ensure the roof is water tight.

What is the purpose of the structure/project?

The project will service a large catchment area and provide a first of its kind retail experience to the local community.

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

Steel was the material of choice from the start.

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

Roll forming of the cladding was done in phases to accommodate each roof section and its canopy if applicable. Due to weather causing delays with manufacturing, the mobile mill

would start and stop numerous times during a day to complete a single section.

With high winds blowing in from the open land around the site, getting the sheeting

onto the roof proved difficult but once on the roof the cladding could be installed without difficulty.

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

At the front of the building a massive canopy spans outward almost the entire length of the mall.

Completion date of steelwork February 2019
Completion date of full project April 2019
Tons of structural steel used 385 tons
Structural profiles used 254×146 I Beam, angles and Lip Channels
Completion date of cladding March 2019
Cladding profile/ type used Prolok 700 for Roof
Cladding area/ coverage and tonnage 17000m2 / 91 Tons
Developer GMI Property Group
Architect Rossouw Argitekte
Structural Consultants Proficient engineering
Quantity Surveyor SM Marè & Associates
Main Contractor Central Development Projects
Roof Sheeter Rainbow Sheeters
Structural Steel Quality Steel and fencing
Cladding Supplier Pro Roof Steel & Tube
Corrosion Protection Paintwork Contractor IPS Industrial Painting Services