Handling of units on site and storage

Because of the ease with which GRC can be formed in a variety of shapes, it is not uncommon to avoid the potentially troublesome eaves detail by cranking or curving the panels at their junction with the roof (Fig. 4.4). Such panels were used at the fire station at the National Exhibition Centre and at Heathrow Euro-lounge. Special equipment may be necessary for handling such units on site, and care must also be taken in designing the fixing devices for lifting to ensure that these do not show on the outside face. Highly profiled panels are also difficult to store and transport, and cranked panels will twist and distort if stacked unsupported on edge (Fig. 4.15).

Also, large upstands and long unsupported ends tend to settle when in their'green' state, and care must be taken during manufacture and storage to avoid sagging of unsupported ends. If this is not done, problems can occur in controlling the size of joints between panels because of difficulties in ensuring alignment of panels during erection.

Repair on site

Although it is possible for specialist contractors to repair minor defects on site using manually applied cement/sand slurry where structural damage has taken place in the form of large holes and the fibre/ cement bond has been broken down, panels should be removed and returned to the factory for repair under closer quality workmanship control, or preferably replaced by a new panel. Panels with surface texture treatments should be resprayed to avoid any

Storey height panel (al

Façade eiemem

Façade eiemem

Single-storey wall panel

4.9 Typical fixings using GRC: (a) sandwich construction fixings; (b) single skin fixings.

4.11 Resilient rubber bush fixing to allow movement.

4.10 Slotted fixings to allow movement at top of panel.

4.11 Resilient rubber bush fixing to allow movement.

Section

Plan

4.12 Minimum cover to cast-in fixings.

4.13 Example of single-skin GRC spandrel panel detail on metal framework.

patchiness occurring on the panel face where the repair has taken place.

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