The Frame or Fabricated module of this eTool. The brackets are designed to be raised and lowered in a manner similar to an automobile jack. Pump jacks are a uniquely designed scaffold consisting of a platform . They are easily adjusted to variable heights.
The pole lumber must be:
The pole lumber must be:
- Other defects that might impair strength.
- Straight-grained
- Free of shakes
- Free of large loose or dead knots
- Free of shakes
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