The length of the bridge's main span is 3,800 feet (1,158 m), which makes it the third-longest suspension span in the United States and 17th longest suspension span worldwide. It is also one of the world's longest bridges overall.
From Wikipedia, the free encyclopedia. In tetrapod anatomy, lumbar is an adjective that means of or pertaining to the abdominal segment of the torso, between the diaphragm and the sacrum. The lumbar region is sometimes referred to as the lower spine, or as an area of the back in its proximity.
There are 5 major regions of the spine: 1  Cervical: The 7 vertebrae in the neck form the cervical region of the spine. 2  Thoracic: The 12 vertebrae in the chest region form the spineâs thoracic region.  Lumbar: The 5 vertebrae in the lower back form the lumbar region of the spine. Lumbar vertebrae are even larger and stronger than thoracic vertebrae, but are more flexible due to the lack of ribs in the lumbar region. All of the upper bodyâs weight bears down on the lumbar vertebrae, leading to many back problems in this region despite the size and strength of the vertebrae.