Workcover have put together a voids in house construction video safety alert which highlights how easy it is to fall through openings on construction sites. The video highlights that workplaces must address voids in site management plans and inductions, and ensure constant supervision. Encourage the use of void covers with those most at risk.
Checkout the code of practice for preventing falls in housing construction to find out your legal responsibilities, safe work methods for common tasks, and using portable ladders and working on roofs safely.