NUMBERING SYSTEM FOR FIRE RATED ASSEMBLIES
TYPES OF PROTECTION
Direct Applied Protection
Floors-Ceilings
A,B*,or C*ááááááááááááá Concrete and Cellular Steel Floor
D,
E* or F*ááááááááááááááááááááááááááááááááááááááááááááá Concrete and Steel Floor Units
G,
H*, or I*áááááááááááááááááááááááááááá Concrete and Steel Joists
J or
Kááááááááááááááááááááááááááááááááááááá Concrete
L or
M* Wood Joist orááááááááááááá Combination Wood and Steel Assemblies
Batts & Blankets or Mineralá and Fiber Boards
Beams:ááááááááááááááááááááááááááááááááááááááááááááááááá
N or O* for Floor-Ceiling
Roof-Ceiling:ááááááááááááááááááááááááááááááááááááááá P, Q* or R*
Beams:ááááááááááááááááááááááááááááááááááááááááááááááááááá
S or T* Roof-Ceiling
Metal Panels Gypsum Bd. Lath and/or Plaster
Metal Stud Gypsum
Bd. Lath and/or Plaster
Wood Stud Gypsum Bd. Lath and/or Plaster
Bldg. or Partition
Panelá Units
Wall
& Partition:áááááááááááááááááááááááááááááááááá U, V or W*
Batts & Blankets or Mineral
& Fiber Boards
The
prefix numbers with an asterisk (*) and the design numbers indicated as
"Reserved" in the above table are for future expansion and to cater to new types of systems
Here is the chart at the bottom of page 1.á It is called the Numbering System for Fire
Rated Assemblies.á