The 35-pound beams lock together to make a rigid base for the tower. The legs on the corners of the base adjust up and down over a 5-foot range to make up for uneven floor levels. The new, patented, Light Bulb Scaffoldâ¢ System is the solution to all your access problems.
Acid reflux is the most common cause of chronic laryngitis. But chronic laryngitis may be caused by more severe problems such as nerve damage, sores, polyps, cancer, or hard and thick lumps (nodules) on your vocal cords. The vocal cords are the vibrating elastic bands inside the larynx that produce your voice.
Acute laryngitis. The most common cause of laryngitis is a viral infection, often similar to those that cause the common cold or flu. Overusing the voice-cheering at an event, for example-can also cause inflammation of the larynx.In very rare instances, acute laryngitis can be caused by diphtheria, a bacterial infection. Acute laryngitis usually lasts for no longer than 2 weeks. 2  Viral infections such as colds are the most common cause of laryngitis. 3  Other causes of laryngitis include vocal strain (yelling or talking a lot) and bacterial infections, such as diphtheria.