Install 5 8 inch type c drywall on the interior surface and 1 2 inch gypsum sheathing on the exterior.
2 hour fire rated exterior wall assembly.
Stc description system rating test no.
Installed with long dimension of sheet strength axis or face grain parallel with studs.
Resistance rating for fire from the exterior face optional for 2 hr fire resistance rating for fire from interior face.
Finish the wall with a 1 inch coat of portland cement gypsum plaster.
Lumber shall be identified by the grade mark of a lumber grading or inspection agency that has been approved by an accreditation body that complies with the.
American softwood lumber standard ps 20.
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.
Base layer 5 8 inch 15 88 mm type x gypsum wallboard applied parallel to studs with 6d coated nails 1 7 8 inch 228 6 mm long 0 0915 inch 2 48 mm shank inch 6 35 mm heads 12.
Wd stud 2 layers 5 8 sheetrock brand gypsum n a j panels firecode core outside both sides 5 8 sheetrock brand gypsum panels firecode core inside both sides 2 rows 2 x 4 24 o c base layer.
Lp flameblock fire rated osb sheathing is a component of the following code compliant fire rated assemblies.
Fire safety caution passing a fire test in a controlled laboratory setting and or certifying or labeling a product as having a one hour two hour or any other fire resistance or protection rating and therefore as acceptable for use in certain fire rated assemblies systems does not mean that either a particular assembly system incorporating the product or any given piece of the product.
The ratings relate to fire tests designed to determine how quickly fire can raise the temperature to unacceptable levels.
Warnock hersey fire resistance rated wall assemblies warnock hersey product listings standards products are certified against astm iso en can cgsb can ulc 1 hour fire resistive rated wall assemblies click the link above each design number below represents a james hardie 1 hour fire resistive wall assembly jh fcs 60 01.
V337 2 hour interior wall assembly ul design no.
2 hour exterior wall assembly ul design no.
Exterior wood siding min 11 32 in.
Use where wall is required to be rated from the exterior and interior sides.
Table 1 for one hour rated wall assemblies and table 2 for two hour rated wall assemblies.
2 hour fire resistance rated exterior wall assembly.
Thick 4 feet wide osb siding panel.
Thick 4 ft wide wood plywood siding panels or 7 16 in.
Build a two hour exterior wall with steel studs rather than wood and special metal stud fiberglass insulation between the studs.
