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Site Storage and Handling
can be safely employed to move trussed rafters around a construction site, although the choice of method will depend to a large extent on the particular circumstances of the lifting operation. Such operation will generally be identified in a contractors safe working method statement that takes account of all the assessed risks and which utilises and refers only to the resources which are available to the site. The preparation of this method statement should be undertaken sufficiently in advance to ensure the adequate planning and coordination of the task and sourcing of any special equipment that may be required. For example, a situation where the manual handling of trussed rafters may be appropriate might be the lifting of single trusses on to residential units not exceeding two storeys in height.
When trusses are stored horizontally, level bearers should be positioned beneath each truss node (minimum) to prevent any deformation and distortion. (See figure 91 above).
 
No other method of storing trussed rafters is considered to be suitable, except where specific provision has been made in the design for an alternative temporary support load case.
 
At such time when it is necessary to remove the pretensioned bindings from a bundle of trusses, extreme care should be exercised. As a precaution against
destabilisation of the whole bundle of trusses, it is recommended that prior to the removal of the bands, timber battens are fixed across the bundle at several locations with a part driven nail into every truss. Such a simple precaution will allow the safe removal of single trusses once the steel bands are removed. A suggested arrangement of batten locations for a standard Fink truss is shown in figure 92 below.
Whatever technique is adopted to manually manoeuvre trussed rafters it is vital that the technique takes full account of any special instructions issued by the designer to ensure that the structural integrity of the units is maintained and that there is no risk of damage to the trusses.
 
Mechanical Handling of Trussed Rafters
 
(Information relating to manoeuvring trussed rafters around the site using mechanical handling techniques).

Where it is not possible for reasons of safety or other practical considerations to implement manual handling techniques to manoeuvre trussed rafters, other means that involve the use of mechanical handling or lifting equipment will be necessary.  Using such equipment gives the option of being able to move larger and heavier loads and consequently, the ability to raise completely or partially assembled sections of roof that have been pre-assembled at another location (for example, on the ground level superstructure of an adjacent plot).
Similar considerations to those identified in the section relating to manual handling remain relevant, although as the size of the loads increase, issues of instability and potential distress/damage to the trussed rafters becomes more
critical. For this reason, it is vital that trusses or sections of roof are only lifted at locations approved by the truss designer, such locations being preferably
marked on the units at the time of their manufacture. Where appropriate, the use of spreader bars and strongbacks may be required to ensure an even
distribution of lifting points.
Alternative details relating to this procedure and which  involve the unbundling of the trusses whilst on the back of the lorry should be communicated by the contractor to the truss manufacturer prior to their delivery to site.
 
Manual Handling of Trussed Rafters
 
(Information relating to manoeuvring trussed rafters around the site using manual handling techniques).
 
With careful consideration manual handling methods