Difference between revisions of "AY Honors/Masonry/Answer Key"
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==2. Demonstrate ability to use properly the following:== | ==2. Demonstrate ability to use properly the following:== | ||
| + | <gallery> | ||
| + | image:Plumbbob.jpg|Plumb Line | ||
| + | image:Level1.jpg|Level | ||
| + | image:Masonhammer.jpg|Mason's hammer | ||
| + | </gallery> | ||
| + | |||
=== Plumb line=== | === Plumb line=== | ||
| − | A plumb line is a string with a plumb bob at the end of it. The plumb bob hangs straight down, so the plumb line can be used to make sure that a wall is perfectly vertical and does not lean in any direction. | + | A plumb line is a string with a plumb bob at the end of it. The plumb bob hangs straight down, so the plumb line can be used to make sure that a wall is perfectly vertical and does not lean in any direction. A perfectly vertical line is said to be ''plumb''. |
=== Line stretcher (chicken legs)=== | === Line stretcher (chicken legs)=== | ||
| + | A line stretcher is used for guiding the mason when laying brick or other materials in a straight line. Typically, the mason will build up the corners or ends of a wall first, stretch a line between them, and lay the remaining bricks between them. The line stretcher is often set about a sixteenth of an inch away from the wall so that the bricks do not touch it (otherwise they might push the line out). | ||
| + | |||
=== Level=== | === Level=== | ||
| + | A spirit level or bubble level is an instrument designed to indicate whether a surface is level or plumb. Spirit levels feature a slightly curved glass tube which is incompletely filled with a liquid, usually coloured 'spirit' (a synonym for ethanol), leaving a bubble in the tube. Ethanol is used because of its low freezing point, −114°C, which prevents it from freezing in cold weather. Most commonly spirit levels are employed to indicate how horizontal (level) or how vertical (plumb) a surface is. | ||
| + | |||
=== Trowel=== | === Trowel=== | ||
| + | A trowel is used for applying mortar to bricks, blocks, or other material. It is also used for "throwing a mortar line" - that is, laying a line of mortar atop the surface upon which that the bricks will be laid. | ||
| + | |||
=== S-tool=== | === S-tool=== | ||
| − | === | + | |
| + | === Mason's hammer=== | ||
| + | A Mason's hammer has one flat traditional face and a short or long chisel-shaped blade. It can thus be used to chip off edges or small pieces of stone without using a separate chisel. The chisel blade can also be used to rapidly cut bricks or cinder blocks. | ||
| + | |||
==3. Demonstrate a knowledge of building cement characteristics (know how to prevent sweating, cracking, shrinking, crumbling, and loss of strength).== | ==3. Demonstrate a knowledge of building cement characteristics (know how to prevent sweating, cracking, shrinking, crumbling, and loss of strength).== | ||
* '''Sweating''' | * '''Sweating''' | ||
Revision as of 01:05, 15 March 2006
Skill Level 3
1. Name at least six materials commonly used by masons in the erection of walls or buildings.
Primary materials include:
- Brick
- Concrete Block (also known as cinder block)
- Poured Concrete
- Stone
- Glass Block
- Tile
Secondary materials include
- Mortar
- Rebar
- Grout
2. Demonstrate ability to use properly the following:
- Plumbbob.jpg
Plumb Line
- Level1.jpg
Level
- Masonhammer.jpg
Mason's hammer
Plumb line
A plumb line is a string with a plumb bob at the end of it. The plumb bob hangs straight down, so the plumb line can be used to make sure that a wall is perfectly vertical and does not lean in any direction. A perfectly vertical line is said to be plumb.
Line stretcher (chicken legs)
A line stretcher is used for guiding the mason when laying brick or other materials in a straight line. Typically, the mason will build up the corners or ends of a wall first, stretch a line between them, and lay the remaining bricks between them. The line stretcher is often set about a sixteenth of an inch away from the wall so that the bricks do not touch it (otherwise they might push the line out).
Level
A spirit level or bubble level is an instrument designed to indicate whether a surface is level or plumb. Spirit levels feature a slightly curved glass tube which is incompletely filled with a liquid, usually coloured 'spirit' (a synonym for ethanol), leaving a bubble in the tube. Ethanol is used because of its low freezing point, −114°C, which prevents it from freezing in cold weather. Most commonly spirit levels are employed to indicate how horizontal (level) or how vertical (plumb) a surface is.
Trowel
A trowel is used for applying mortar to bricks, blocks, or other material. It is also used for "throwing a mortar line" - that is, laying a line of mortar atop the surface upon which that the bricks will be laid.
S-tool
Mason's hammer
A Mason's hammer has one flat traditional face and a short or long chisel-shaped blade. It can thus be used to chip off edges or small pieces of stone without using a separate chisel. The chisel blade can also be used to rapidly cut bricks or cinder blocks.
3. Demonstrate a knowledge of building cement characteristics (know how to prevent sweating, cracking, shrinking, crumbling, and loss of strength).
- Sweating
- Cracking
- Shrinking
- Crumbling
- Loss of strength
