Typically, costs for installing a concrete access ramp fall between $1432 and $2377 and will vary with the size and features of construction as well as with your choice of finishes and landscaping elements.
Causes of Fingernail Ridges, Pitting and Curved Nails. 1  Longitudinal ridges (running from the cuticle to the free edge of the nail) may be due to aging and not a sign of any disease.  Nail beading, where the nail loses its smooth curvature, is also a normal part of aging.
When it comes to picking out the causes for a nail biting habit, psychologists have pinpointed virtually everything under the sun. Some stick to a fairly conventional explanation: that it's due to preoccupation, boredom, tiredness, or a wish for simple comfort. Others, however, have more out-there explanations.