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.
For example, a job description may require a welder certified at the level of 4-G. The G stands for groove welding. The number indicates the position of the welder in relation to the work.If you examine the welds below, you can see four different positions, starting with the easiest.ust below that is a 5G cert, which involves pipe welding in the vertical position. The video above describes a typical qualification test used in welding certification. Please note that the welder's part of this test starts when you see the number 2 in the lefthand corner of the screen. The test stops after Step 8.