The systems are designed to withstand the intermittent surges of air pressure caused by fast moving elevator cabs.
Fire rated 2 hour shaft wall assembly.
Face layer 5 8 15 9 mm toughrock fireguard x products or 5 8 15 9 mm densarmor plus fireguard gypsum panels installed vertically to studs with 1 58 type s.
Deflection 5 7.
Steel sustained air pressure load psf size spacing thickness allowable in.
Two hour three hour and four hour rated walls require additional protection of penetrations since they must resist higher temperatures than a one hour rated wall and for a longer time.
Use steel studs and two layers of 1 2 inch type c drywall on each side of the studs for a two hour fire rating on an interior wall.
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.
Ul design u499 w419.
U498 2 hour stairwell construction 1 fire shield shaftliner j track 020 0329 3 leg 0329 only view a a i stud 020 0329 u499 1 hour shaftwall allowable wall heights for 1 hour fire rated i stud assemblies stud stud min.
Two doors each with a fire protection rating of 1 1 2 hours installed on opposite side of the same opening in a fire wall shall be deemed equivalent in fire protection rating to one 3 hour door.
Use special fiberglass rated for use in firewalls.
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.
Usg provides resources here for our ul wall assemblies for seamless integration into any construction project.
These wall assembly files are used for planning and estimation purposes for many ul wall types such as fire rated wall assemblies.
These systems utilize either an i stud or a c t stud and j track to.
Mount a 1 1 2 inch fiberglass barrier inside the studs.
Base layer of 5 8 15 9 mm toughrock fireguard x products or 2 8 15 9 mm densarmor plus fireguard gypsum panels installed horizontally or vertically with 1 type s screws 24 o c.
Head of wall firestop system gypsum board fire trak shadowline.
For testing requirements see section 715 4 3.
Sw 106 1 hour shaftwall with deflection track.
