Optimum design
Although each have their proponents, it is fair to say that the first type, made
of helically wound galvanized steel sections in a wide range of diametres, has
proved the most cost effective and flexible underground solution, being unlimited
by size and shape to offer an infinite variety of layouts.
Another question to consider is whether the manufacturer is equipped to provide
a full design solution for the project. Certainly, consultants and specifiers with
experience in this field may well have the skills to arrive at the optimum solution.
So rapid hasbeen the rise in importance of stormwater attenuation systems that
a sizeable minority of project engineers have had no experience of incorporating them, in which case the availability of such a service is not to be underestimated.
large tank systems have the advantage of being not only fully pre-fabricated with access shafts, ladders, inlet
and outlet connections all installed, but also being accessible for routine inspection–a fundamental requirement
with many authorities.
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