There is a normal lordosis in the upper (cervical) spine and the lower (lumbar) spine. People with scoliosis develop additional curves to either side of the body, and the bones of the spine twist on each other, forming a C or an S shape in the spine. Scoliosis is about two times more common in girls than boys. It can be seen at any age, but it is most common in those over about 10 years of age. Scoliosis is hereditary in that people with scoliosis are more likely to have children with scoliosis; however, there is no correlation between the severity of the curves from one generation to the next.
The final rule requires that employers inspect walking-working surfaces regularly and as needed and correct, repair, or guard against hazardous conditions; and Training (Â§1910.30).
The Regulations require that, for construction work, handrails have a minimum height of 950 mm, and that any gap between the top rail and any intermediate rail should not exceed 470 mm.The Regulations also require toe boards to be suitable and sufficient (eg a toe board of a minimum 100 mm height would be acceptable).he Work at Height Regulations 2005 changed the meaning of working platforms, which were traditionally seen as fully-boarded platforms with handrails and toe boards. A working platform can now be virtually any surface from which work can be carried out, such as: