4" 3 Hour Vertical Mount Fire Door 2661-24X20

4" 3 Hour Vertical Mount Fire Door 2661-24X20

  • $126.72
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h3.Standard Features * 2661 - Square or rectangular fire door for vertical mount only. Maximum dimension 60x60. For damper free area chart A click here * 2663 - Out-of-Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 60w x 52h. For damper free area chart B click here * 2665 - Round fire door for vertical mount only. Available 4" thru 52" round. * 3 hour rated * UL and California State Fire Marshall approved * 4-1/4" standard frame style * Interlocking steel roll-formed blade (3) with roll-formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G-90) * Self locking corner (4) * 165° replaceable fusible link (2) h3.Options * Sleeve variations * 304 stainless steel construction * Fractional and odd sizes available h3.Installation Instructions * UL approved installation instructions