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3320.11 Jacks
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The rated capacity of every jack shall be legibly marked in a prominent location on the jack by casting or stamping. The manufacturer shall designate the intended supporting point of the load and the maximum permissible length of lever and force applied.
Every jack shall, where practicable, be provided with a positive stop to prevent overtravel; otherwise an indicator to clearly show overtravel shall be provided on the jack.
Lubrication and operation of jacks shall be in accordance with the recommendations of the manufacturer.
When the object has been lifted to the desired height, blocking or cribbing shall be immediately placed under it if the jack does not have built-in safety devices such as stop-rings, locknuts or place-in cylinder sleeves.
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3320.11 Safeguards During Construction or Demolition, Jacks
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Jacks shall meet the requirements of Sections 3320.11.1 through 3320.11.5 ...
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The carrying capacity of a pile installed by jacking or other static forces shall be not more than 50 percent of the load or force used ...
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3320.11.3 Safeguards During Construction or Demolition, Maintenance
Lubrication and operation of jacks shall be in accordance with the recommendations of the manufacturer ...
NYC Building Code 2008 > 33 Safeguards During Construction or Demolition > 3320 Material Handling Equipment > 3320.11 Jacks > 3320.11.3 Maintenance