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.
Less or More Melanin. The pigment melanin gives our hair, skin and eyes their color. It seems that with age, the amount of melanin in the iris can change, resulting in a change in the perceived color. This is also the cause of hair color change.