Hidden Doors can be located above or below ground. They are most often found in the walls, floors and ceilings of homes.
They can open and close inward, outward, upward, downward, and sideways.
While Alcohol Prohibition resulted in some of the best known hidden doors, secret passages and safe rooms (Speakeasies), the technology of today allows us to build automatic or electronically operated hidden doors that lock, unlock, open and close at the push of a button!
To those in the Hidden Door Industry like Hidden Door Builders, the tools and techniques used to build and automate hidden doors are protected Trade Secrets.
Hidden Door Hinges > are needed for some doors. Heavy Duty Doors require Heavy Duty Hidden Hinges. Which hinges to use is a Trade Secret Revealed in the Manual.
Hidden Doors can be nearly any size and can be made of many different materials (including projectile resistant metal construction) and they can take many forms (mirrors, stairs, panels) but the most common is the wooden bookcase hidden door.
The Bookcase Hidden Door comes in two basic types:
1. Light Duty (top right >) and 2. Heavy Duty (below left).
Hidden Door Fact:
Only the Heavy Duty Bookcases can carry the weigh of real books with-out failing.
The Hidden Door Trade Secrets used to build the full size bookcase hidden door (< left) include three basic principles for supporting and transferring the load > these are revealed in the Manual.
Bookcase Hidden Door
A Bookcase Hidden Door can be used to quickly and easily access a Secret Passage, Compartment or a Safe Room >