Sheet metal workers work in both the field and in the shop utilizing mathematics and pattern layout development methods. They cut, bend, and shape sheets of metal. They use specialized fastening devices such as bolts, rivets, screws and solder.
A standard dose of 5 tuberculin units (TU - 0.1 ml) (The standard Mantoux test in the UK consists of an intradermal injection of 2 TU of Statens Serum Institute (SSI) tuberculin RT23 in 0.1 ml solution for injection.) is injected intradermally (between the layers of dermis) and read 48 to 72 hours later.
Test Results Using the SI and the TIBC, the TS% is calculated. Normally, the TS% is between 20% and 40%. A TS% greater than 45% indicates iron loading, which is a build up of iron in the blood. This can lead to serious problems including arthritis, diabetes and liver cirrhosis.