Wood 2 Hour Fire Rated Ceiling

By code i need a minimum 1 2 hour rating. 5 8 type x gypsum wallboard h 2 6 type s drywall screws 12 o c. 3 mineral wool batts.

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Ceiling provides one hour fire resistance protection for wood framing.

Wood 2 hour fire rated ceiling.

Ibc table 721 3 item 21 1 1 describes a single prescriptive 1 hour rated floor or roof assembly that includes wood trusses. Sheathing on both sides. With 1 2 wood structural panels with. Ul n501 two layers of 5 8 15 9 mm fire shield wallboard applied to beam cage fabricated from.

Table 1 one hour fire rated loadbearing wood frame wall 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. Tested a number of wood frame fire resistance rated as semblies see photos. 12 x 24 2 x 4 8 w10 x 25 beam floor units and beam support 3 hr.

276 fire rated ceiling assemblies suspension ceiling designs floor ceiling designs a003 3 hr. 3 4 fr 83 12 x 12 z runners fluorescent type none 2 1 2 concrete. 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. 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.

Concrete with cellular steel 3 hr. 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. Assemblies rated from both sides. Determine the existing or planned building elements including structural mechanical electrical and finish materials in the fire rated assembly.

Drywall end joints located midway between continuous channels and attached to additional pieces of channel 62 1575 mm long with screws 12 305 mm. On a related note the woman who answers the phone at the gysum association is very knowledgable about fire ratings. 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. Lumber shall be identified by the grade mark of a lumber.

And 12 of r 38 fiberglass batt insulation. Wood joists wood i joists floor trusses and flat or pitched roof trusses spaced a maximum 24 o c. The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels. Gypsum wallboard beam fireproofing 8wf24 or heavier cad file name goldn dwg or goldn dxf no.

2 fire rated wood frame wall and floor ceiling assemblies. Urb concealed grid system and tile. With 1 25 mm type s drywall screws 12 305 mm o c. 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.

Description 1 2 hr. 2x4 16 o c.

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