A glass obtained by heating annealed glass to a high temperature and then suddenly cooling it - Which makes it four times stronger than annealed glass; used as safety glass because it breaks into pieces that are small and blunt enough not to cause in

A building construction manager sets the targets, objectives and responsibilities for all supervised staff invonved in the construction They also regularly review timings, budget, labour, risk and project plans to ensure work stays on track.
Building construction managers set and agree on budgets.
They conduct site visits to inspect work, check materials and ensure staff are following health and safety guidelines.