Fitting Tie Braces - BAC PCT Cooling Tower Rigging & Assembly Instructions

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FITTING TIE BRACES

Some PCT units are fitted with tie braces on the basin legs to provide
structural stiffness to the unit. Where possible these are factory fitted
although if they are shipped loose they will need to be fitted in the
field. The following procedure should be followed to fit the tie braces:
1. Once the basin has been levelled out and shimmed, and prior
to the casing being fitted, an inspection should be made to
ensure that all posts are reasonably vertical and that the basin is
supported in all nine places [or twelve places for rectangular units].
2. Fit the diagonal tie braces at their top end only picking up pre-
drilled holes in the post. Do not drill the bottom tie brace holes
in the posts yet. The tie braces have a bend to give stiffness. The
bent edges should be oriented so that they will deflect water into
the basin.
3. Place the casing on top of the basin legs with the majority of the
weight being carried by the crane. DO NOT REMOVE THE CRANE
UNTIL ALL TIE BRACES ARE TIGHTENED.
4. Check that posts are vertical and aligned correctly. The weight
of the casing and the position of the crane can skew the posts
sideways and may need adjustment. Swing the tie braces so that
the lower hole is centred in the basin post. If the posts are parallel
and square, the holes should be an equal distance up from basin
ledge. Once the posts are square, tie braces should be pulled tight
and clamped. The bolt holes may now be drilled and bolts fitted.
Now tighten all tie brace bolts. The crane can now be released.
Figure 9. Fitting Tie Braces
Optional Accessory
& Loose Item Installation
Air Inlet Louvres
Float Valve
Fitting Tie Braces
Section AA
M A R 1 0 9 - 1
W W W . B A L T I M O R E A I R C O I L . C O M . A U
11

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