Tuesday, August 3, 2010

carpentry ( tle 50 )


Carpentry and plumbing

What is Carpentry?

  • The art of cutting, framing, and joining timber, as in the construction of buildings. An assemblage of pieces of timber connected by being framed together, as the pieces of a roof, floor, etc.; work done by a carpenter.

What is Plumbing?

  • The pipes, fixtures, and other apparatus of a water, gas, or sewage system in a building. The work or trade of a plumber. Informal. An arrangement of bodily vessels or ducts: "treating stroke victims by reversing the plumbing of the body's circulatory system" (Associated Press).

How to make Hallow Blocks


  • Inflate a beach ball and use a felt pen to draw a circle around the top, with the air valve in the center. This will be the opening of your concrete block.

  • Apply water-based concrete-releasing agents to the entire surface of the ball.

  • Wrap strips of hardware cloth around the surface of the ball, leaving the area inside the drawn circle clear. Be sure the strips remain as evenly spaced as possible: Multiple layers on top of one another will create an uneven surface, which makes it trickier to get the concrete sphere right.

  • Place a layer of wet concrete around the surface of the ball. The layer should be a uniform 1/2 inch thick around the entire surface. The area inside the drawn circle should be kept completely free of concrete mix.

  • Allow the concrete to harden for at least 24 hours.

  • Deflate the ball and carefully remove it from the concrete.

  • Add additional layers of concrete over the first until the block is of the desired thickness. You may wish to do this in stages, adding a little concrete at a time instead of placing it all on at once.



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