African Design Magazine ADM #41 June 2018 | Page 34

PEPKOR DC WAREHOUSE
According to Dave Reid, general
manager at Macsteel, the project was
completed with Macsteel’s NOVOTEXI
440 ® concealed-fix roofing profile using
BlueScope’s legendary ZINCALUME ® steel
in coating mass AZ150 and total coated
thickness (TCT) 0.53mm on the roof. The
cladding was the company’s Wide-span
762 formed using Clean COLORBOND ®
coating mass AZ150at 0,47 mm TCT on
the sides. “Significantly Macsteel roll
formed 660 tonnes on site with their
mobile roll forming machines in a record
time” says Reid.
According to Arno Hanekom, regional
manager of BlueScope Southern Africa,
a critical element to the design of the
roof was the selection of ZINCALUME ®
and Clean COLORBOND ® steels. “The
coating on ZINCALUME ® comprises 55%
aluminum, 43.5% zinc and 1.5% silicon.
It has excellent corrosion performance,
forming capabilities and is available in
high strength grades. In the case of the
Pepkor DC, product was supplied in
coating mass AZ150, TCT 0,53mm and
at longitudinal tensile strength G550. In
addition, ZINACALUME ® offers an above
average solar reflective index when
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AFRICAN DESIGN MAGAZINE © | JUNE 2018
compared with other unpainted roofing
materials such as galvanized steel. “The
continuous hot dip process used to
produce ZINCALUME ® steel provides
a surface coating which has a shiny
appearance with a uniform small spangle.
This coating, patented to BlueScope,
determines the solar absorbance of the
upper surface. In short, ZINCALUME ®
steel minimises the fraction of the
sun’s energy absorbed by the roof and
maximises the fraction reflected. With
a new SRI value of 63, ZINCALUME ®
offers superior performance over time
when compared to all other unpainted
materials. It keeps this property much
longer than comparable materials and is
much less prone to corrosion even in a
harsh climate”.
Shades of grey cladding
The warehouse’s cladding was erected by
Impact Engineering. Clean COLORBOND ® ,
was supplied in coating mass AZ150,
TCT 0,47mm and at longitudinal tensile
strength G550. Colours were Armour
Grey and Volcanic Grey, used to keyline
prominent structural elements on the
side of the building in a visually pleasing
way. In addition, the high performance