Most mound ceremonial centers are built near rivers and lakes. Mound builders lived in small communities of families led by elders. They made pilgrimages to the closest ceremonial centers to make offerings to their gods and to bury their loved ones. The ceremonial centers were built on timbers, often with a temple for sacrifices on top and crypts to bury the dead underneath.
There are many different factors that may determine welding sequence. Of course, a 1G weld is defined as a Flat (1) Groove (G) weld and the 1G is usually used when describing the position of welding any flat material such as bar, sheet, or plate. The thickness of the material may affect sequence.
This type of welding uses an electrical power source to create an arc between the base metal and an electrode stick or wire. The arc is struck by turning on the welding machine, adjusting the settings, getting safety gear and materials in place and then scratching or tapping the electrode against the base metal.IG welding is one of the more difficult welding processes to learn and is most often used to weld very thin pieces of stainless steel and non-ferrous metals such as magnesium and aluminum. Filler metal is added to the weld from a tungsten rod that is separate from the electrode.