A double egress door system has two doors that swing in opposite directions from each other—one side for people going out and one side for people going in. Opening each door is possible by pushing the acting leaf side (almost always the right-hand side).
Side by side doors, also known as double doors, are two door configurations where both doors are next to one another. Another name for this type of doors is a French door. The doors can either be active or inactive.
Double acting describes a door that swings in both directions, in and out. Because of this feature, the door always swings away from the person or load passing through it, allowing easy and safe passage.
What is a DOUBLE EGRESS DOOR FRAME? A DOUBLE EGRESS DOOR FRAME is a frame that is prepared to receive two single-acting doors swinging in opposite directions ...
Single and Double Action Spring hinges to give them there full name do exactly what they say; a single action hinge will close a door which opens in one direction and a double action hinge will close a door which opens in both directions.
A single action revolver has a light and smooth trigger pull, as it only needs to drop the hammer. This allows for more accurate shooting. A double action revolver has a heavier, longer trigger pull, which can be detrimental to accuracy.
DA/SA typically refers to a semi-automatic, but in the case of a revolver, double-action generally means a weapon combining the ability to fire both double- and single-action. The trigger mechanism function of a DA/SA semi-automatic handgun is identical to a DA revolver.
These kinds of doors are called Norman doors, named after Don Norman, the author of The Design of Everyday Things and one-half of the NNGroup. Norman doors appear as if they're push/pull when they're actually the opposite, causing confusion and embarrassment to the user.
Vehicle doors that are hinged on the rear side, or rear-hinged doors, are commonly known as suicide doors. The name appeared in the 60s due to them being unsafe for passengers.
As you might assume, a double wide entryway is going to cost more money. Not only do you have to buy two doors instead one, but the surrounding architecture could be costlier. Even if you have the budget, you may not quite have the space.
Double action hinges, also known as hinges that swing both ways, are a popular option for in-house door hinges. These hinges allow doors to swing open and closed in both directions, making them ideal for high-traffic areas. To make a door swing both ways, a two-way hinge can be installed on the door.
A double-acting door is one that swings in and out, often used in high-traffic locations like a restaurant kitchen. This is different from a double-egress pair where one leaf swings in and the other leaf swings out, which I have discussed in previous posts.
The HERCULES Series Vertical Lift cold storage door is a cold storage system that is available in multiple thicknesses, widths, and heights. It is flexible in design, and can be applied to multiple building applications.
Mullion (mull)
When two individual windows or a door and window are joined, the seam between the frames of the two units is called the mull, which is short for mullion. In this case, a door jamb has been joined to a window/sidelight jamb.
These doors were designed in the Netherlands in the 17th century to keep animals out and children in. Dutch settlers brought this charming style to the United States in rural homes of New York and New Jersey.
Wicket Doors allow personnel to enter and exit a building through a roll-up door via an independently operating door and frame assembly – simply open the roll-up door and swing the frame out of the way when full opening access is needed.
Hemlock external doors, price and quality, ideal for painting and for use on rear entrances. The Hemlock faced, engineered doors are constructed using a laminated fir, finger jointed core and supplied with loose pinned Hemlock glazing beads.
The Norman door is basically any door that's confusing or difficult to use. It was named after (and not by) design guru Don Norman to define this all-too-common design foible.
A butler door is traditionally a full-sized single door that swings in and out with a double swinging hinge. Butler doors allow for the mess of a kitchen to be covered. Butler doors were once used to keep the kitchen staff from being visible to the dining room guests.
Double leaf doors are also referred to as double doors or french doors. Where a leaf is a single door, a double leaf door involves two doors, both of which open in the center where they meet. These offer a stately appearance and, like standard doors, can be both modern or traditional.
Impactable Breakaway Doors
The Thermostop Impactable door / panel is equipped with extremely impact-resistant composite skins. Furthermore, to avert damages to the door and the hardware, the optional knockout capability allows the door bottom panel to break away and to release itself upon impact.
Since the 1930s, the NFA has imposed requirements on short-barreled rifles because they are more easily concealable than long-barreled rifles but have more destructive power than traditional handguns.
Alabama, Alaska, Arizona, California, Colorado, Florida, Georgia, Hawaii, Illinois, Iowa, Michigan, Minnesota, Mississippi, Missouri, Nebraska, Nevada, New Jersey, New York, North Dakota, Rhode Island, and Wisconsin all have restrictions against the ownership of SBRs.
AK-47, also called Kalashnikov Model 1947, Soviet assault rifle, possibly the most widely used shoulder weapon in the world. The initials AK represent Avtomat Kalashnikova, Russian for “automatic Kalashnikov,” for its designer, Mikhail Timofeyevich Kalashnikov, who designed the accepted version of the weapon in 1947.