I am a mechanician.(electrician, Pipelayer,welder, carpenter, turner, blacksmith, builder, erector, riveter,rigger, concrete worker, engine-driver,repair worker).
Studies on everyone from seafarers on container ships to welders in Nigeria might be able to help us, although given how important sleep is to us it's surprising how few large-scale studies have been conducted.
They were conservative men. They represented workers with certain skills, such as wood workers or metal workers. They did little to organize workers with other kinds of skills.
Nine people including at least three children are reported to have been killed in Thailand when fireworks stored in a warehouse were ignited by welders.
For instance, research into the sleep patterns of welders on container ships in Nigeria showed that those who slept on their back were more likely to suffer back pain, compared with those who slept on their sides.