Good housekeeping on a construction site — keeping walkways clear of debris, scrap, and combustibles — primarily reduces the risk of:

Explanation

Housekeeping answers two hazard families at once, which is why the standard treats them together: the physical one - scrap, debris, protruding nails and form lumber underfoot on walkways, stairs and work surfaces - and fire, because combustible scrap and waste left to accumulate is the fuel load. The rule accordingly requires containers for scrap and combustible waste and their regular removal. The wrong answers are real hazards controlled by other means entirely: cave-ins by protective systems, silica and lead by engineering controls and exposure assessment, and shock and arc flash by de-energising and guarding. A tidy site does nothing for any of the three.