steveray
SAWHORSE
Who is calling this on a drop acoustical ceiling in a commercial kitchen? Commentary isn't a lot of help...Thanks!
506.3.11 Grease duct enclosures. A grease duct serving a
Type I hood that penetrates a ceiling, wall, floor or any concealed
spaces shall be enclosed from the point of penetration
to the outlet terminal. A duct shall penetrate exterior walls
only at locations where unprotected openings are permitted
by the International Building Code. The duct enclosure shall
serve a single grease duct and shall not contain other ducts,
piping or wiring systems. Duct enclosures shall be either
field-applied or factory-built. Duct enclosures shall have a
fire-resistance rating of not less than that of the assembly
penetrated and not less than 1 hour. Duct enclosures shall be
as prescribed by Section 506.3.11.1, 506.3.11.2 or
506.3.11.3.
506.3.11 Grease duct enclosures. A grease duct serving a
Type I hood that penetrates a ceiling, wall, floor or any concealed
spaces shall be enclosed from the point of penetration
to the outlet terminal. A duct shall penetrate exterior walls
only at locations where unprotected openings are permitted
by the International Building Code. The duct enclosure shall
serve a single grease duct and shall not contain other ducts,
piping or wiring systems. Duct enclosures shall be either
field-applied or factory-built. Duct enclosures shall have a
fire-resistance rating of not less than that of the assembly
penetrated and not less than 1 hour. Duct enclosures shall be
as prescribed by Section 506.3.11.1, 506.3.11.2 or
506.3.11.3.