The steel material only accounts for about one-third of the total framing cost. Two-thirds of the cost goes into fabrication, erection, and other labor costs. Like archeng59, I often add steel tonnage in order to have a more repetetive building that cuts down the labor costs.
1 A change in skin color is due to an underdeveloped circulatory system. 2  Babies often exhibit mottling of the skin due to their immature circulatory system. 3  The nerve supply to the fine blood vessels on the upper skin layer is still immature.
1 Pregnancy hormones can cause Melasma which make dark patches of skin appear on the face.  Friction: If your thighs rub together, that skin may get darker than the rest of your body. Knees, elbows, underarms and other areas that get rubbed often are typically dark.