Hollow Metal Doors arrive factory machined to SteelCraft hinge specifications. The doors have an option for no bore or a 161 bore prep to SteelCraft specifications. For more information about SteelCraft specification, please click here. Additional bore options are considered special order.
No Bore
The “No Bore” option is a popular choice, particularly when using panic hardware. With this option, hardware is directly attached to the door’s face, eliminating the need for any boring processes.
161 Prep
The “161 Prep” is designed for cylindrical lock installations. It features a bore center (the backset) positioned 2-3/4″ from the edge of the door and a bore diameter of 2-1/8″. There is an edge preparation of 1-1/8″ x 2-1/4″ to accommodate the lockset latch. This prep is suitable for most cylindrical handle sets with a 2-3/4″ backset option.
161 Prep with Thru Bolts
In addition to the standard 161 Prep, “161 Prep with Thru Bolts” includes additional through bolts that are added based on the chosen lockset. This extra reinforcement is often necessary for heavier duty locks to prevent lever sag. While this prep is typically performed in the field, it can be completed during assembly upon request and requires a template.
86 Edge Mortise Pocket
The “86 Edge” is a mortise lock prep option that involves a door edge preparation of 1-1/8″ x 8″. It is designed for attaching the lock box to the door edge and does not include any face preps. Please note that doors with this prep must be special ordered at this time.
86 Edge Mortise Pocket with Function Holes
Similar to the 86 Edge Mortise Pocket, this option includes function holes cut into the face of the door for the lockset. The specifications for these holes can vary in terms of diameter, quantity, and location, depending on the lock manufacturer and function. This prep is often done in the field but must be special ordered at this time and requires a template.
Common Use Cases
Each bore option finds its niche in specific use cases. For instance, the “161 Prep” is a popular choice in commercial office spaces, where standard locksets are frequently used for security and access control. Conversely, the “No Bore” option is favored in emergency exit doors, particularly those equipped with panic hardware. These common use cases help you tailor your decision to your door’s intended function.
Architectural Wood Flush Doors provide a blank canvas for customization, allowing customers to select the bore option that best suits their needs. Whether it’s a “No Bore” option for panic hardware or a specialized prep with function holes, these is a range of choices to meet your architectural and functional requirements. Please note that some preparations may require special orders and templates for proper machining.
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