Page "Scaffolding" Paragraph 29
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Often scaffold frameworks will require more than simple base plates to safely carry and spread the load.
Scaffolding can be used without base plates on concrete or similar hard surfaces, although base plates are always recommended.
For softer or more doubtful surfaces sole boards must be used, beneath a single standard a sole board should be at least 1, 000 cm² with no dimension less than 220 mm, the thickness must be at least 35 mm.
On uneven ground steps must be cut for the base plates, a minimum step size of around 450 mm is recommended.
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