8.5 - Extended end laps

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Where sheet length restrictions mean a double span sheet is not possible, it is possible to provide extended overlaps at the junction of two single span sheets (> 8% of span either side of support) to create an effective double span; Refer to Fig. 8.5a.

Although this is technically suitable as a detail, it is not recommended for practical reasons (ie. less economical, difficult to install, requires more detailed fixing configuration with additional fixings in webs of sheets).

Other items within 8.0 - Design - Roof deck:-

8.0 - Design - Roof deck

8.1 - Quality

8.2 - Spans

8.3 - Loads

8.4 - Standard end laps

8.5 - Extended end laps

8.6 - Raking supports and cutting