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A door is a panel that covers an opening in a building, room or vehicle. Doors are usually made of a hard, semi-permeable, and hard-to-break substance (such as wood or metal), but sometimes consisting of a hard frame into which windows or screens have been fitted. Doors are often attached by hinges to a frame. Doors make ingress into or egress from a building, room, or vehicle easier to manage. The panel may be moved in various ways (at angles away from the frame, by sliding on a plane parallel to the frame, by folding in angles on a parallel plane, or by spinning along an axis at the center of the frame) to allow or prevent ingress or egress. In most cases, a door's interior matches its exterior side. But in other cases (e.g., a vehicle door) the two sides are radically different.
Often, doors have locking mechanisms to ensure that only some people can open them. Doors can have devices such as knockers or doorbells by which people outside can announce their presence and summon someone either to open the door for them or give permission to open and enter. Apart from providing access into and out of a space, doors can have the secondary functions of ensuring privacy by preventing unwanted attention from outsiders, of separating areas with different functions, of allowing light to pass into and out of a space, of controlling ventilation or air drafts so that interiors may be more effectively heated or cooled, of dampening noise, and of blocking the spread of fire.
Doors may have aesthetic, symbolic, ritualistic purposes. To be given the key to a door can signify a change in status from outsider to insider. Doors and doorways frequently appear in literature and the arts with metaphorical or allegorical import as a portent of change.

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  1. PiratePast40

    Oregon  Another back door move by liberals

    Legislation that does not seem to affect firearm rights can have a profound effect, and we should be aware of what's going on. Ranked choice voting is up for another hearing/work group on Tuesday. HB2004 would allow ranked choice voting. Proponents claim that it makes voting as easy as...
  2. Lazyfaire

    New solid door lock system

    Here in Texas, a teacher who I believe was out of the El Paso school district, has designed and is selling a new style door lock to put onto interior classroom doors in case of a lockdown/active shooter. The reason that this is so important is because on most classroom doors teachers must step...
  3. Caveman Jim

    Big order heading out the door

    I’m glad to finally see some product leave the shop, I’m gonna get to go fishing this weekend. :p
  4. arakboss

    Get Off My Car Door
  5. N

    Light shines through safe door

    I bought a new Liberty safe and I noticed when I shut the door, I can see the LED lights shine through the sides of the door until they shut off. Has anyone else experienced this? I assumed there would be a tighter seal and wonder how that effects the heat protection.
  6. Alexx1401

    Glass door 1, dumb crook 0. Maybe when he wakes up he will think about a job? :D
  7. RobMa

    More back door gun control it seems…

    Why does this not surprise me, by hook or crook.
  8. sagia308

    look out 4 the st house rifle out the door trick 1917 Eddie stone 30-06 sporter out to 501 yards just under plate last shot

    well the angle from the cammera was from the right side u see
  9. coop44

    Sign for my front door

    I sleep days, work nights As you stand here, ringing the bell and knocking Remember two things- One: I know precisely where you are standing. Two: This door is not bullet proof. too much?
  10. Jay Walk

    Why I never open my door.

    You know me, you can text me or call if you are outside.
  11. EHJ

    Kate Brown leaves soon - and she's vowed to release as many incarcerated criminals as she can on her way out the door...

    Screw the paywall - open in a private window if you can. This is bullocks.
  12. RugerDog

    Ruger Dog says you can change a negative to a positive!

    1) If opportunity doesn't a door! 2) Life begins at the end of your comfort zone. 3) When life gives you lemons...grab some tequila and salt! 4) Failure is not falling down...But...the failure to get up! 5 It's never too late...Never too late to start over...Never too late to...
  13. ob1

    Security door lock bars, local fab shop ?

    In the early stages of planning a new safe vault room. The problem with super duper door locks is they are only as strong as the entry frame. Not excited with the idea of putting an actual vault door in as I would be leaving that investment behind when it comes time to Didi Mao. From time to...
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