Using eyeball layout instead of a control point
Use a verified control point instead of eyeball layout. Your eye is not accurate enough over a duct run.
Stop if
- What control point should I use for this layout?
Watch out
- Do not start layout from 'looks about right'.
Check
- Find grid/control/benchmark.
- Measure from a known point.
- Snap/laser/mark the layout.
- Check against drawing dimension.
- Ask if control points are missing.
Steps
- Find grid/control/benchmark.
- Measure from a known point.
- Snap/laser/mark the layout.
- Check against drawing dimension.
- Ask if control points are missing.
Say this to your foreman
What control point should I use for this layout?
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