Answers.Body: <p><a href="http://brickset.com/parts/4646513" rel="nofollow noreferrer">This hinge</a> combined with a technic pin lets you easily make large trap doors. You can see a train-track-sized trap door in <a href="http://cache.lego.com/bigdownloads/buildinginstructions/6073384.pdf" rel="nofollow noreferrer">this model</a> using two of these parts. In this model the trap door falls down when you retract an axle that normally holds it up. Other arrangements are possible.</p>
  
  <p>The beauty of this particular hinge is that it is symmetrical, so there aren't two different halves to keep track of, and you can use any kind of technic pin you want. The relatively long plate on it makes it sturdier than some of the older variants like <a href="http://brickset.com/parts/6019987" rel="nofollow noreferrer">this one</a>.</p>
  
  <p><img src="https://i.sstatic.net/yjXue.jpg" alt="enter image description here"></p>
  
  <p><img src="https://i.sstatic.net/M4lwJ.png" alt="enter image description here"></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-06-23T14:56:49.343Z
Answers.Text: @Ana You're welcome. There are, of course, infinitely many other ways to do it. But this is using one of the newer, available-in-stores techniques. And using different pins to hold the plates together allows you to have looser or stiffer trap doors.
Answers.UserDisplayName: Mr. Shiny and New 安宇
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-06-22T19:10:10.850Z
Answers.LastActivityDate: 2015-06-22T19:10:10.850Z
Answers.UserDisplayName: Mr. Shiny and New 安宇
Answers.Body: <p>You can build your own trap door from System and Technic pieces. Use plates for the surface and frame (maybre reinforced by bricks if necessary), and attach one or more (depending on the weight and size) Technic joints underneath. I have no pieces with me at the moment, so I can't show you, but if you need clarifications, I'll look up images of the pieces I'd use.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-06-22T08:10:30.753Z
Answers.LastActivityDate: 2015-06-22T08:10:30.753Z
Answers.UserDisplayName: zovits
Body: <p>I need to build a large trap door, the trap door 4x5 with frame 6x8 is too small for my model. Other doors/hinges seem to have too much resistance and the door doesn't fall by itself, it must be rotated. Do you have any ideas as to which parts I could use? I thought I could use 3 of these doors together, the problem is finding the right counterpart.</p>
  
Tags: <building><technic>
Title: Large trap door - alternative to door with frame 4595708
UserDisplayName: Ana
ThreadText: # Large trap door - alternative to door with frame 4595708
  
  (Asked by: username_0 on 2015-06-21)
  
  I need to build a large trap door, the trap door 4x5 with frame 6x8 is too small for my model. Other doors/hinges seem to have too much resistance and the door doesn't fall by itself, it must be rotated. Do you have any ideas as to which parts I could use? I thought I could use 3 of these doors together, the problem is finding the right counterpart.
  
  **Tags:** building, technic
  
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  ## 2 answers
  
  ### Answer by username_1 on 2015-06-22. Score: 4 | Accepted answer
  
  [This hinge](http://brickset.com/parts/4646513) combined with a technic pin lets you easily make large trap doors. You can see a train-track-sized trap door in [this model](http://cache.lego.com/bigdownloads/buildinginstructions/6073384.pdf) using two of these parts. In this model the trap door falls down when you retract an axle that normally holds it up. Other arrangements are possible.
  
  The beauty of this particular hinge is that it is symmetrical, so there aren't two different halves to keep track of, and you can use any kind of technic pin you want. The relatively long plate on it makes it sturdier than some of the older variants like [this one](http://brickset.com/parts/6019987).
  
  ![enter image description here](https://i.sstatic.net/yjXue.jpg)
  
  ![enter image description here](https://i.sstatic.net/M4lwJ.png)
  
  > **Comments:**
  > **username_1**: @Ana You're welcome. There are, of course, infinitely many other ways to do it. But this is using one of the newer, available-in-stores techniques. And using different pins to hold the plates together allows you to have looser or stiffer trap doors.  
  
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  ### Answer by username_2 on 2015-06-22. Score: 2
  
  You can build your own trap door from System and Technic pieces. Use plates for the surface and frame (maybre reinforced by bricks if necessary), and attach one or more (depending on the weight and size) Technic joints underneath. I have no pieces with me at the moment, so I can't show you, but if you need clarifications, I'll look up images of the pieces I'd use.
  
  
  ---
  
  