SFL chimneys (see Compatible Systems opposite) can
be mast supported in three ways...
Freestanding
Square or Circular Single Post
 Mast
supported chimneys can form architecturally attractive
features through the benefits of compact arrangements
with mast and chimneys coloured to choice if required.
They can be designed to accommodate any number of chimneys
up to heights of approximately 50m, with mast frames
in square, triangular or rectangular format.
Using either circular or square hollow section steel,
this type of chimney design is relatively lightweight
compared to other methods of chimney construction.
Click here for technical information
Multi-leg Frame
Square, Triangular, Rectangular
 Mast
supported chimneys can form architecturally attractive
features through the benefits of compact arrangements
with mast and chimneys coloured to choice if required.
They can be designed to accommodate any number of chimneys
up to heights of approximately 50m, with mast frames
in square, triangular or rectangular format.
Using either circular or square hollow section steel,
this type of chimney design is relatively lightweight
compared to other methods of chimney construction.
Click
here for technical information
Building
Base, Wall and Roof
 This arrangement of providing two fixing
points for the support mast can be applied to either
the single post mast or the multi-leg frames.
When the
mast is provided for base fixing only, a relatively
large overturning moment has to be accommodated. In consequence,
a large foundation requirement is necessary.
Where the support mast is required close to the building,
or partly within it, site conditions may not always permit
the construction of large concrete foundations, so an
alternative engineering arrangement has to be considered.
When two fixing points for the mast are provided, one
at the base and the other either to a wall or at the
rook intersection, the base foundation requirement is
substantially reduced. The resultant forces are changed
from an overturning moments to two simple horizontal
reactions.
It can be seen that this type of solution is particularly
relevant to open frame mast structures. It permits the
installation of the chimney arrangement which could not
be as easily achieved with other chimney constructions.
Click here for technical information
   
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