Tying-in ~ all putlog and independent scaffolds should be tied
securely to the building or structure at alternate lift heights
vertically and at not more than 6„000 centres horizontally.
Putlogs should not be classified as ties.Suitable tying-in methods include connecting to tubes fitted
between sides of window openings or to internal tubes fitted
across window openings, the former method should not be used for
more than 50% of the total number of ties. If there is an
insufficient number of window openings for the required number of
ties external rakers should be used.Tubular Scaffolding