what is clear opening width as per BS

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The minimum door widths for mounting a Senior Swing are: Concealed 2810 Series: 2811 single door (offset pivot or butt hinge) -- 33". 2811 single door with stop (center pivot) -- 36". 2853 pa...
The Minimum single door opening should be 26.32" and use the 299 or 499F strike.
The minimum door opening width (for mounting a pair of 4640 or 4630 operators on a double door) is 72" wide (2 - 36" door leaves). Mounting the 4640 or 4630 on a double door that is less than 72" w...
A Double Egress frame is a double door frame prepared to receive two single-acting doors swinging in opposite directions (both doors are) the same hand. These openings are installed in cross corrid...
Pocket pivot hinges are mainly used in cross corridor applications where clear opening width is a factor. For frames, pocket pivot hinges are a special hinge options which must be spe...
The rough opening dimensions are the same for either Welded (SUA) or Knock Down (KD) frames For F, FN, FE, DE, MU three sided frames and four sided borrowed light frames: New masonry Walls: N...
 For DW, K three sided frames and four sided borrowed light frames: Three sided frame = door opening width (order size) plus 1 1/2" minimum to 2" maximum and the door opening height ...
See image, ANSI A115.1 Mortise Lock PrepThis door prep requires the N escutcheon with the L283-029 spacer kit to keep the springcage from falling into the door.  Spacer kits are...
Purpose: When there is concern for the weight of overhead wall construction, or, when multiple surface applied hardware components are being used. This continuous channel has the ability to spre...
Clear Opening Width for swinging doors is measured (with the door open 90 degree) from the face of door to stop soffit on strike jamb.          &nbs...
The minimum clear opening width for ADA is 32" measured from face of door opened to 90 degrees to face of stop on strike jamb. There must be no hardware mounted to the door projectin...