How far does wood expand

*Under constant humidity wood won't expand much from 20c to 30c. Moisture is the leading cause of expansion in wood products.

* Knowing that wood will naturally attempt to equalize with the humidity in it's environment, a woodworker must know how the wood will expand. Movement in a piece of stock will occur across the grain, as opposed to along the grain. That is to say, a 1x6 that is four feet long will almost always stay four feet long. However, depending on the moisture content of the stock and the air (and the variety of wood used), the width and thickness (to a lesser extent) may vary considerably.

Steps to how to biuld a fence

1. Lay out a line where the fence is to be installed. Usually this will be along the property line, so be careful it doesn't encroach on your neighbor's property, or you will be relocating it later.
   
   

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2. Determine the height the fence should be to meet your needs. Six foot is normal for a privacy fence, a live stock fence four feet high is usually sufficient, and picket fences are often three feet high.
3. 3
   Set your "end posts". These are the posts located at either end or any corners along the fence.
   • Use "post hole diggers" to dig the holes.
   • Dig your post holes deep enough to support the fence structure. Because soil conditions vary, and the height of the fence, the type of fencing, and other factors must be considered in determining how deep the post should be, we will use 30 inches as a median depth for the post holes.
   • Place the end posts in the holes, and fill in around the posts with dirt or cement, packing it as you do. Check the post for "plumb" before they are completely filled and packed, and adjust as needed.
4. 4
   Pull a builder's line from one end post to the other, at an equal height above the ground. This will allow you to dig the intermediate holes in alignment with the fence, and give you a depth so that the posts will all be the same height.
5. 5
   Lay out the post holes between the end posts eight feet center to center, and dig the rest of your holes.
6. 6
   Set the remaining posts, measuring the same distance from the top of each one to the building line, and plumbing them as you go.
7. 7
   Pack the backfill around all of the posts firmly.
8. 8
   For a privacy fence, nail a 2X4 board (stringers) with 12 or 16d galvanized nails, from post to post along your fence line at the top, the center, and about a foot from the bottom of each post.
9. 9
   Nail the vertical boards, usually 1X6 rough sawn lumber, leaving a space between each board to each of the stringers with 8d spiral shanked galvanized nails.
10. 10
    Paint the finished fence with a good quality waterproofing sealer. This will usually either contain silicone solids, or linseed oil. If you plan on painting a finish paint, stick with an oil based sealer, and use an oil based polyurethane paint or exterior enamel for the finish paint.

09/03/2011

On wendesday i learnt how to use an electric planer. It was really easy. i stayed on the lines that i was planing. one of my class mates were teaching me and a few other students. i learnt how to glide the planer untill you reach the end of your piece of wood.

saftey pionts

*always wear PPE.
*make sure the wire is over your shoulder at all times.
*make sure the wood chippings wont blow into the wind.
*make sure no one is standing next to you as you start planeing.

8th MARCH 2011

On tuesday we took a numercy and a lietracy test. Then we worked on our bloggers. then we went to the work shop and practiced our dove tail joints for our tool box.

Monday 14 march 2011

Yesterday we worked on our saw stools. 1st we went to the work shop and we had to dress our own pieces of 2x4's. (wood 50x100) we used a thickenesser, bench planer and a dimension saw.

after we dressed our pieces of wood we took them to our class room and started marking out the plan on to our pieces of wood. After i marked my lines i started to chisel away. I made a few mistakes like chiseling to hard and it chipped of parts of my wood that i didn't want gone. but i fixed my mistakes, i Glued my work back on. i think it was my big muscles aye. hahaha  and after i finished chiseling we went to the class room and we learnt how to do a site set out step by step. i also learnt that a DATUM point never ever moves. it is a fixed point. Your DATUM point gives you the height. it is also used for man hole covers.  

finishing of my Drawing board

On Monday i finished my drawing board. the designs i put on them were a cup holder, a pencil catcher and a ruler chiseled into the left side of my drawing board.

I also helped other students finish their drawing boards and helped them catch up. Or i had to show them how to use a specific tool or machine.

then after lunch we went to the class room and we learnt formulas and ways to calculate areas and learnt how to change numbers to a 3DP(decimal point).

notes: AREA=LENGTH x WIDTH
AREA=LENGTH x WIDTH x 1/2 TO FIND AREA OF A TRIANGLE.

2nd FEB wednesday

On wednesday we had to use a;
*battery drill
*belt sander
*roughter
*jigsaw
*hole saw

It was really cool using the machines for the 1st time. i really got the hang of some of the tools.

My drawing board looks really cool. its even got a cup holder. haha