e-mosty December 2018 e-mosty December 2018 | Page 18

Figures 32 and 33: Precast side cantilevers
and temporary connection details
Concrete materials also play a large part in my work.
High strength concretes are used; 80MPa for the
tower which was unusual at the time and in the
location. Since the 1970s I have used microsilica
mixes to provide durability and corrosion protection.
This is an unusual level of detailed thought and a key
reason behind the success of this project. It is too
common for small construction changes to affect the
overall elegance of the work. But it is also a function
of a full understanding of the construction process to
be part of the design.
Sungai Prai like most of my structures uses preformed
liners to provide consistent textures on the concrete
to enable uniformity in weathering.
One of the most important aspects of my philosophy
shown by Sungai Prai is that the engineering thought
needs to be robust and extensive to allow for full
realization of a concept and a single mind taking a
project from start to fruition.
But this is detailed at the design stage so that precise
changes in texture are co-ordinated with construction
joints and formwork ties. The linear geometry formed
part of the mandatory construction sequence
information to the contractor.
My approach starts with a visit to the site, an essential
part of the process.
Figures 34 and 35: Completed Tower showing slenderness above deck
and integral pier connection
4/2018