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Today, we are going to do measuring and 
marking out on sheet metal, all of the dimensions

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will be coming from the drawing and the
tools will be using will be a 300 millimeter

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rule, a pair of proportional dividers, a
combination square, a scribe, engineer's square,

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Whitney punch, centre punch, Cross pein
Hammer and tin shears

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Selecting the metal will make mark it out to
the sizes of the drawing sizes being one

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hundred and fifty six millimeters and 102
millimeters.

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This is allowing for folding. What we do.

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We use a scribe to mark the line.

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Then we take an engineer square to make sure
that the lines are at 90 degrees.

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We could check that the metal is square by
holding the engineer's square to it and

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ensure that no daylight comes through.

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We will now go over to the guillotine using
a suitable pair of gloves.

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We will guillotine the metal to the correct
sizes.

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Once we are sure that the metal is on the
line would use the treadle guillotine,

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ensuring that no body parts sre under the pedal
and hands are safely away from the blade.

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We now go back to the marking out bench and
mark the metal out,

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Accordingly, we transfer the measurements
from the drawing onto the metal, using the

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following equipment. We need a 12 millimeter
folding line.

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We would set the dividers up using the steel
rule, making sure that the proportional

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dividers was set at 12 millimeters.

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We now mark out the corresponding size of 24
millimeters.

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And we now need to create 45 degree lines,
the easy way to do this is set.

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The proportional divideers back to 12
millimeters.

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And create squares because the angle across
the square would be at 45 degrees.

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We now have a 12 millimetre square.

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another 12 millimetre square, and we need a
third 12 millimetre square

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So we take the dividers and set them back to
36 millimeters.

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Using a combination square, we can now
scribe in a line at 45 degrees.

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We will now go over to a metal benchtop, with the
centre punch and cross pein hammer to

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mark the centre points where we are going to
use a Whitney punch.

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Placing the center punch on the centre 
point, we would mark where we are going to

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use a Whitney punch.

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To use the Whitney punch, we would line up the
nipple on the punch itself into the hole,

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which you have just done with the centre punch
and punch the hole straight through.

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The reason we use a Whitney punch instead of
a drill is because there is less distortion,

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no heat created.

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We'd now snip on the 45 degree lines into
the Whitney punch hole.

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We can check that they're 45 degree lines
by using a combination square.

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This is to ensure that when the two 45
degree lines fall together, they will make

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90 degrees.

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So we're now going over to the folding
machine.

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Placing the metal on the previously marked line,
 we will clamp down the metal and fold

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it to 90 degrees, wewill ensure that nobody is
within the vicinity.

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We would bend the knees and lift up to 90
degrees, lower the folder away

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and repeat the process on the opposite side.

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Now go into the box and pan folder.

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We would fold up the two ends of the
electrical box.

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Ensuring that the folder is on the line
previously marked out.

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We've now completed the base of the
electrical box.