Only the Schlage F51F is rated for 90 minutes. To obtain this fire rating, you must special order the F51F model or special order the UL latch, which makes the lock fire rated.
Schlage F51: Fire Rating
Only the Schlage F51F is rated for 90 minutes. To obtain this fire rating, you must special order the F51F model or special order the UL latch, which makes the lock fire rated.
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