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.
2 doctors agreed: Different ways: There are few different reasons a nail may get curved or concave. Trauma may damage a nail root and deform the shape of the nail. In other cases, a fungal infection may be the culprit of the deformed nail. In some cases, the shape of the nail runs in the family.