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OO Gauge Layout Support Structure

John has an OO gauge attic layout and asks readers:

“My attic layout is cantilevered off the roof structure of my bungalow. This keeps the attic floor clear so panels can be lifted to give access to house wiring and central heating pipes without the need to disturb the layout. This gives me an oval 28ft long by 9ft wide. I am trying to make this structure perfectly level by using a spirit level. Building is by clamping, drilling and screwing. There are no nails because hammer blows move members out of position in the clamps. How do I achieve perfect leveling of the baseboards? The hardwood timber framing of the baseboards has been machine cut and is accurate thickness and the baseboard panels are 9mm. ply. But I believe there is about 10mm variation in the support structure throughout the 28 feet run.”

Comment below.

2 Responses to OO Gauge Layout Support Structure

  • Geof says:

    John,

    A simple way to check if a structure is level is to get a length of clear 10 or 12 feet long or so. With a helper, pour water into the tubing so that it is filled enough so that about half a foot or so is empty at each end of the tubing. You can add some food coloring to the water so that it will be easier to see.

    Hold one end of the tubing so that the water level is at the same height you want your baseboards or height measurement to be. Your helper should hold the tubing at about the same height farther down at the potential baseboard’s height location. The water level at each end of the OPEN tubing will always be the same, so whatever height your desired water line is at one end of the tubing, the opposite end will be exactly at the same height. Mark each desired height location with a pencil. Move down a section and, using the same technique, raise the tubing again so that the tubing’s water level matches the pencil mark you just made. The tubing’s opposite end water level will match, so mark that location as well. Keep ‘leap frogging’ in this manner down one side of the room until you’ve made as many height marks you’ll think you will need for that side.

    Once one side has been measured/completed, use the same technique when starting the opposite side by ‘bridging’ the tubing from the end of the first side you just did over to the opposite side. Make your mark on the second wall and then work your way down the second side as you did the first.

    Note that the tubing length can be as long as you want though the longer, the better. Even a tube that is 100 feet long will produce the same result providing there are no air pockets in the piping.

    OR

    You can go out a buy a digital (laser) level for about twenty bucks.

    Hope this helps,

    Geof from the US

  • nelson says:

    I’m not sure what the problem would be, but to level a 28′ run I would use a piece of clear plastic tubeing fill with water. Just place an end anywhere you would like to check, water level will be the same.

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