While there are several different types of joints that differ ... These include hinge, ball and socket, planar, pivot, saddle, and ellipsoid joints. What Is a Hinge Joint? A hinge joint is a synovial ...
Read more: 8 Hammer Types ... and hinges). Residential fire-rated doors are tested and assigned a rating of 20, 45, 60, and 90 minutes. A 180-minute rating is mainly relevant to commercial fire ...