narrow stile lock

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The minimum stile for each lock will depend on the backset and the rose diameter/escutcheon width.  See the Schlage Minimum Stile Requirements for the minimum stile for eac...
  Falcon strives to provide a solid product, with solid performance, at a solid price. To better align with this mission statement the Grade 2 tubular Falcon Y lock and all parts will be...
Yes.  A fire rating was approved in 2016.Please see the 33A/35A catalog here for more information:http://us.allegion.com/content/dam/allegion-us-2/web-documents-2/Catalog/Von_Duprin_33A.35A_Se...
55 and 88 are both crossbar exit devices.  55 Series is used on narrow stile applications, 88 is for wider stile applications. See attached tables for 55 and 88 series minimum stile requirement...
Depending on the door construction the minimum stile may differ but a safe dimension would be 4-3/4".  CUSTOMER must check door construction. The pocket depth requirements of the case is 4 1/2".
The single gang is: 2 3/4" x 4 1/2" The narrow style is: 1 3/4" x 4 1/2"
From the edge of the door to the glass there needs to be 5" or even more for an LE mortise lock.