House painters in Morgantown WV working on tall ladders instead of scaffolding to paint up three / four stories
<a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/">National Institute for Occupational Safety and Health (NIOSH)</a> from USA
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/25069384@N03/2698649790/">Women Painters on Ladders</a>