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Supported scaffolds and outrigger scaffolds (thrust out) shall be designed by a registered design professional. Where the scaffold is to be located upon a sidewalk shed, the requirements of Section 3307.6.4.2.2 shall also apply.
Exception: Design is not required for a supported scaffold, provided Items 1 through 6 are complied with:
  1. The scaffold is not an outrigger scaffold (thrust out);
  2. No hoisting equipment with a manufacturer's rated capacity greater than 2,000 pounds (907kg) will be located on the scaffold;
  3. The scaffold will not be loaded, or designed to be loaded, in excess of 75 pounds per square foot (366.15 kg/m2 ) (e.g. a light duty scaffold, a medium duty scaffold, or a heavy duty scaffold);
  4. The scaffold is less than 40 feet (12 192mm) in height;
  5. Side-arm or end-arm scaffold brackets are used exclusively for the support of workers; and
  6. Where the scaffold has a height-to-base ratio (including outriggers supports, if used) of more than four to one (4:1), it is restrained in accordance with Section 3314.9.1.

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Outrigger scaffolds (thrust out) shall not be used for loading in excess of 50 pounds per square foot (244.1 kg/m2) (medium duty ...
3314.14 Safeguards During Construction or Demolition, Outrigger Scaffolds (Thrust Out)
Outrigger scaffolds (thrust out) shall not be used for loading in excess of 50 pounds per square foot (244.1 kg/m2) (medium duty ...