User:Johnson&Johnson&Son/sandbox

In general there's three ways to secure a screw/bolt:

Case 1: Unsecured

Case 2: Semi-permanently secured, e.g. loctited

Case 3: Permanently secured, e.g. positively locked with a safety wire

Which of the three above general categories does a screw held under spring pressure fall under?

Obviously when there's very little spring pressure it's no different than no spring at all, so let's consider the case where the spring is held under great tension.

In 2007, 72.5% of tenants paid rent at market rates, 27.5% paid rent at reduced rates. More than 50% of EU households owned their homes, with the highest rates of home ownership found in Romania (96%), Lithuania and Slovakia (both 89%) and Hungary (87%). The lowest percentages of home ownership were in Switzerland (37%), Germany (46%) and Austria (52%). In 2009, 73.5% of the EU-27 population owned their homes, and 36.9% of the owners had a mortgage or a housing loan. That same year, 41.7% of the EU population lived in flats, 34.3% in detached houses and 23.0% in semi-detached houses.

All data as of 2007, only Switzerland data is from 2009.