CSLB C-33 Painting & DecoratingPlanning and EstimatingMedium
A painting contractor is reviewing a bid for a new commercial construction project. The specifications require the use of an 'SSPC-SP 3 Power Tool Cleaning' standard for surface preparation on all steel substrates. How will this requirement primarily influence the contractor's estimation of labor and equipment costs?
- AIt will mean only light cleaning to remove loose dirt and debris, reducing overall preparation time and cost.
- BIt will necessitate the use of power tools to remove loose rust, mill scale, and paint, increasing equipment and associated labor.
- CIt will demand abrasive blasting to achieve a near-white metal surface, significantly increasing equipment and disposal costs.
- DIt will require manual wire brushing and scraping, increasing labor for hand tools.
Show answer & explanationAnswer & explanation
Correct answer: B. It will necessitate the use of power tools to remove loose rust, mill scale, and paint, increasing equipment and associated labor.
SSPC-SP 3 Power Tool Cleaning specifically requires the use of power-assisted hand tools to remove loose rust, mill scale, and paint. This directly impacts equipment selection (power tools) and the associated labor for operating them, making option B the correct choice.
Why the other options are wrong
- A. This describes SSPC-SP 1 Solvent Cleaning, which is for removing grease and oil, not surface profile preparation.
- C. This describes SSPC-SP 10 Near-White Metal Blast Cleaning, a much more aggressive and costly method.
- D. This describes SSPC-SP 2 Hand Tool Cleaning, not SP 3.
SSPC-SP 3 Power Tool Cleaning
A standard for surface preparation of steel that requires the removal of loose rust, loose mill scale, and loose paint by power tools, leaving a surface free of visible oil, grease, dirt, and other foreign matter.
- Uses power-assisted hand tools (e.g., grinders, needle guns).
- Removes loose contaminants, not tightly adherent ones.
- Achieves a higher degree of cleanliness than hand tool cleaning.
- Impacts labor for operation and equipment for power tools.
Memory trick: Each SSPC standard is a step up in steel cleanliness, from a quick wipe to a full blast.