Joints can be separated into two classes: functional and structural. Joints are divided into three different functional classes. They are synarthroses, amphiarthroses, and diarthroses. Synarthroses means the joint is immovable, amphiarthroses means the joint is slightly moveable, and diarthroses means the joint is freely moveable.
minimum recommended protection lightweight and easy to use requires no maintenance osha cdc epa and nyc doh mh recommend using a n95 disposable respirator as minimum protection from mold and dust
types of respirators osha requires employers to evaluate respiratory hazards and base the selection of respirators on the amount and type of contamination that is present warning failure to wear an appropriate fit tested respirator places a person at high risk of inhaling allergens and toxins from mold and other construction dust