Square , plumb and level

John M.
22 words 2 learners

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  1. carpenter's level
    a straight bar of light metal with a spirit level in it
    Figure 2 - Post level holder
    • Plumb:
    There are two tools used to check the plumb of an object:
    • Carpenter's level - Always check plumb on adjacent sides as shown in Figure 1.
  2. plumb bob
    the metal bob of a plumb line
    Figure 3 - Using a plumb bob
    A new innovation is a level clamp that will actually hold a level against a post, working as a third hand, allowing you to set the plumb of a column or post without having to hold onto the level, as shown in Figure 2.
  3. support column
    a column that supports a heavy weight
    A correctly plumbed object such as a support column takes maximum advantage of gravity, transferring loads directly to the ground.
  4. plumb level
    a carpenter's level with a plumb line at right angles to it
    Depending on the model, they can provide all functions of plumb level and square.
  5. vertical surface
    a surface that is vertical
    Figure 4 - Laser level

    Figure 5 - Water level
    • Carpenter's level - using a carpenter's level on a horizontal board is similar to the use on a vertical surface.
  6. air bubble
    a bubble of air
    When using a water level it is important that there are no air bubbles in the tube or kinks in the tubing and that both ends of the tubing are open to the air.
  7. horizontal surface
    a flat surface at right angles to a plumb line
    If the horizontal surface is longer than twice the length of the level, it is wise to check level at both ends and in the middle.
  8. plumb
    exactly vertical
    • Plumb: Plumb is defined as true to a vertical plane.
  9. water level
    the level of the surface of a body of water
    Figure 4 - Laser level

    Figure 5 - Water level
    • Carpenter's level - using a carpenter's level on a horizontal board is similar to the use on a vertical surface.
  10. center line
    a line that bisects a plane figure
    Many times a board can be warped or have a crown that is not on the center line.
  11. dead center
    the position of a crank when it is in line with the connecting rod and not exerting torque
    When working with a level, close is not acceptable, the bubble in the vial must be dead center.
  12. tubing
    conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
    • Water level - a water level is a piece of clear tubing filled with water, as shown in Figure 6.
  13. laser
    an optical device that produces an intense beam of light
    Figure 4 - Laser level

    Figure 5 - Water level
    • Carpenter's level - using a carpenter's level on a horizontal board is similar to the use on a vertical surface.
  14. bubble
    a hollow globule of gas (e.g., air or carbon dioxide)
    When working with a level, close is not acceptable, the bubble in the vial must be dead center.
  15. intersect
    meet or cross at a point; overlap
    Figure 1 - Using a level to plumb a post
    • Square: Square is when a plumbed object intersects with a level object they create a 90 degree angle.
  16. clamp
    a device that holds things firmly together
    Figure 3 - Using a plumb bob
    A new innovation is a level clamp that will actually hold a level against a post, working as a third hand, allowing you to set the plumb of a column or post without having to hold onto the level, as shown in Figure 2.
  17. square
    a polygon with four equal sides and four right angles
    Figure 1 - Using a level to plumb a post
    • Square: Square is when a plumbed object intersects with a level object they create a 90 degree angle.
  18. angle
    the space between two lines or planes that intersect
    Figure 1 - Using a level to plumb a post
    • Square: Square is when a plumbed object intersects with a level object they create a 90 degree angle.
  19. load
    weight to be borne or conveyed
    A correctly plumbed object such as a support column takes maximum advantage of gravity, transferring loads directly to the ground.
  20. complex
    complicated in structure
    • Plumb bob - Plumb can also be checked with the use of a plumb bob, although using it to set a post or column requires 2 units and is a much more complex exercise.
  21. construction
    the act of building something
    If you are concerned about a post or column shifting during construction, a plumb bob can be attached to a post and allows for a quick verification that plumb is being maintained, as shown in Figure 3.
  22. length
    the linear extent in space from one end to the other
    A 48 inch level works best when working with columns or posts over 4 feet in length.
Created on Fri Jan 20 09:55:57 EST 2012

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