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This image is an example of how we use door handing. For this method of handing we always reference from outside the door and facing the door. From that position we first look at hinges.
If the hinges are on the Left, the door is Left Hand (LH) or Left Hand Reverse (LHR). If the hinges are on the Right the door is Right Hand (RH) or Right Hand Reverse (RHR).
Now, if the door pushes open, or opens into the room, it is considered standard. These are our RH and LH doors. If the door would pull open or swings to the outside of the room it is considered a Reverse door. These are our RHR and LHR doors.
So, if we are facing the outside of the door, the hinges are on our right and we would pull the door open we have a RHR door!
Note: These do not always line up with the typical way doors are handed in a residential setting. What is commonly called "Left Hand In-swing" does equate to a LH door, but a "Left Hand Out-Swing" would equate to a RHR door.
When viewing from the outside:
A 161 prep is simply a common cylinder lock prep. It contains a 2-1/8" bore on the face, with a 2-3/4" backset to the center of the hole. On the same centerline as the bore but on the corresponding lock edge there is a 2-1/4" long x 1-1/8" tall x 1/8" deep latch plate with squared corners. In the center of the latch plate there is a 1" bore going from the lock edge to the 2-1/8" hole on the face. Finally, there are often two pilot holes for the screws to attach the latch plate.
Thru-bolts are often added at the 2-3/4" backset at 1-3/8" from the centerline both above and below the bore. The spacing between the thru-bolts can vary but 2-3/4" is the most common, followed by 2-5/8" and sometimes 2-35/64".
The 161 prep is also commonly referred to as a "cylinder prep" or "cylinder lock".
An 86 prep is a common mortise lock prep. At the designated centerline a pocket is mortised/cut approximately 6-5/8" long x 1" tall x 4-1/2" deep. There is also a faceplate/cover that is typically 8" long x 1-1/4" tall x 1/8" deep.
Typically when a simple 86 prep is requested is only for this basic pocket, and does not include any additional function holes for a lever/knob, cylinder lock, thumb turn, etc. Function holes on the face(s) of a door may vary by make and model, but typically are at a standard backset of 2-3/4" from the edge of the door.
The 86 prep is also commonly referred to as a "mortise prep" or "8 inch mortise" or "mortise pocket".
AFF locations are often used on exit device hardware applications along with a few others. The templates and instructions for these devices often list the centerline location of the lock as some number AFF or Above Finished Floor, but we need to know the measurement from the top of the door (Location). The calculation isn't complicated, but here is how we do it:
The three numbers you will need in order to get everything else is the Opening Height (OH), the Door Height (DH) and of course the given AFF Location (AFFL). From there we subtract the Door Height from the Opening height which gives us the Overall Undercut (OU) of the door, as well as the measurements above (AU) and below (BU) the door. The AU is always 1/8", so the BU is the OU - AU. Given that information we can compute the Location by adding the BU to the DH and then subtracting the AFFL.
So it is really a three-step process where we first calculate the OH, then the BU, and finally the Location. Written out in mathematical form the equation looks like this:
DH + ((DO - DH) - AU) - AFFL = Location
or to break it down a bit simpler:
DO - DH = OU
OU - AU = BU
DH + BU - AFFL = Location
From there the mathematically minded can do some simple algebra. The two DHs in the long equation cancel out and leave us with the more simplified equation:
DO - 1/8" - AFF = Location
This example uses a standard 3070 (3' x 7') opening and an arbitrary AFF location.
For customer convenience this information can all be found in a single, printable document, provided below. This document contains warranty details, allowable tolerances, exclusions and the warranty claim procedure. Fore any further questions, please reach out to us directly by phone, email, or the Contact Us page.
For customer convenience this information can all be found in a one page, printable document, provided below. This document contains information for storage and handling, finishing, installation, cleaning and touchup, adjustment and maintenance, and fire door installation instructions. For any further questions please reach out to us directly by phone, email, or the Contact Us page.