Urb concealed grid system and tile.
Wood 2 hour fire rated ceiling.
2 fire rated wood frame wall and floor ceiling assemblies.
Determine the existing or planned building elements including structural mechanical electrical and finish materials in the fire rated assembly.
Table 1 one hour fire rated loadbearing wood frame wall assemblies.
Lumber shall be identified by the grade mark of a lumber.
Ibc table 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses.
Description 1 2 hr.
2x4 16 o c.
With 1 2 wood structural panels with.
Elements of buildings the fire resistance rating classifies the ability of an assembly to confine and isolate fire within a zone comprised of fire resistance rated walls ceiling and floor assemblies.
Ceiling provides two hour fire resistance protection for wood framing where that note is included the entire rating is provided by the gypsum and you don t need a particular floor.
By code i need a minimum 1 2 hour rating.
With 1 25 mm type s drywall screws 12 305 mm o c.
Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c.
I need help to determine the fire rating of a ceiling unfinished attic space above with 1 2 gyp board with attached to wood trusses 24 o c.
The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.
Refer to the fire resistance rating summary to determine the ul design numbers and ceiling system products that correspond to the fire rated assemblies that meet your needs.
Sheathing on both sides.
Drywall end joints located midway between continuous channels and attached to additional pieces of channel 62 1575 mm long with screws 12 305 mm.
Ul n501 two layers of 5 8 15 9 mm fire shield wallboard applied to beam cage fabricated from.
5 8 type x gypsum wallboard h 2 6 type s drywall screws 12 o c.
Concrete with cellular steel 3 hr.
On a related note the woman who answers the phone at the gysum association is very knowledgable about fire ratings.
Descriptions of successfully tested lumber wall assemblies are provided in table 1 for one hour fire resistance rated wall assemblies and table 2 for two hour fire resistance rated wall assemblies.
Tested a number of wood frame fire resistance rated as semblies see photos.
Gypsum wallboard beam fireproofing 8wf24 or heavier cad file name goldn dwg or goldn dxf no.
And 12 of r 38 fiberglass batt insulation.
3 mineral wool batts.
3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete.
12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.
5 8 toughrock fireguard c gypsum board or 5 8 densarmor plus fireguard c gypsum panel ul g505 only applied perpendicular to rigid furring channels 24 610 mm o c.