07/1173 - Operational Works - Transport Type 6 - Refurbishment of Boathouse & Jetty [As Published] · 142007.1173

11/08 03 MON 09:48 FAX 07 4936 1708 ROCLA POLES QLD @o10

(Tzanspert {cont} }

The ideal support arrangement is “two-peint'. Two bearers only are used to
support each pile. This best provides control ovez the loads, and thus the pile
stresses, by being sure of the load distribution. More than two supports can be
risky as all of these supports may not be acting et the same time, depending
upon their own support conditions, and can distribute the load in an excessive
and uncontrolled way. This is particularly the case with road transport as the
truck is a relatively flexible structure, especially ‘extendables'. The more
flexible the support, the mere important it is to provide ‘two-point’ supports.
However, perticularly for long piles, this ideal mey not be possible, The
compromise is to add resilient supports (supports which deform but act to
reatrain) at appropriate locations and/or use “split supports’ (bearers placed
close to each other but with the intention to act as one)-

Support bearers should consist of 4 strong but resilient material.
. Hardwood suits this purpose. Direct contact to steel is not recommended. Bearexs
{ should have a contact width of typically 100 to 1S6mm and an appropriate
thickness for the type of timber being used and the pile weight involved. Fiat
bearers suit lew pile weights (the maximum static lead between a pile and a
bearer = 20 kN). Scalloped or shaped bearers should be used to support higher
pile weights (the maximum static load between a pile and a beurer = 40 KN),
particularly these on the bottom layer of a multi-layered loading.

Piles may be stacked in layers provided that :

lL. The upper bearer is directly over the iower bearer and
2. The allowable number of layers is dependent upon the pile weights involved.
3, The Longer piles must be placed below shorter piles.

4. The general requirements, described helow, are followed.

AS @ genezal rule, the bottom layar should consist of shaped bearers anc
the upper layer may be Zlat bearezxs,

In all cases, the piles need to be firmly restrained during transit. The
piles should be chained to the truck at each support bearer. To avoid chafing
of the piles, wear-resistant fabric or similar shouid be used between the chains

‘ and the outer most piles of the load.

The central, mid-span area of the piles should have a “belly chein' to
bind the piles together as one ox, if preferred, into smaller groups instead.
This chain must NOT be tied back to the truck. The “belly chain’ heles reduce
dynamic effects and thus reduces pile stressea.

There must be adequate chocks to prevent the piles from moving laterally
and restraint mist provided at the ends.

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