4000 Tempra™ Intermediate and Heavy-Duty ceiling suspension readily accepts Nema Type-G light fixtures and air diffusers as well as industry standard square and narrow reveal edge acoustical ceiling panels. Ceiling grid is flame spread Class A and suitable for general areas. 4000 Stab is ICC-ES listed for seismic ceiling suspension applications and all CMC stab cross tees include Quick-Click™ integral clips for fast and sturdy installation. Cross tees are also available with Hook type cross tees with butt-cut ends for easy relocation and flush panel fit. Ceiling grid components are available in HRCmax™ (High Recycled Content) to maximize results on sustainable construction projects. Wall angle with 9/16" wide face is available in standard and shadow wall molding styles.