The basics on a Speed square

This is the most universal pieces of  equipment that you can own is a speed  square we'll talk about some of the  simple things about a speed square its  main purpose is to lay out lines very  very quickly and very efficiently and  accurately so the first thing since it's  a square it's made to bump up to the  edge of workpiece and scribe a 90 degree  line to one edge now another thing that  you can do with the speed square is it  has this long 45-degree leg on it and  it's the same process you can bump it up  to the edge of the workpiece and scribe  a 45-degree line off this edge .

Another  cool thing that you can do with the  speed square is this guy to built in  quarter inch increments for ripping  stock you can pick one of those slots  say if you want to cut two inches off of  the board you would get to the two inch  slot and drag your pencil and the square  down and you'd have a two inch line from  the outside of your board another great  thing about the speed square is it's  also a protractor .

If you see all these  numbers here on the side of the square -  to use the protractor what you have to  do is is on all squares they have what's  known as a it says pivot on the top side  it's got a arrow pointing to the corner  to use it you're going to pick a edge  that you're going to bump it up to and  holding the square real firmly you're  going to pivot the square in any  direction and hold it to wherever you  want that that line to be say if we  wanted one 45 degrees I'm going to try  to draw a parallel to this one .

You'll  read on this side of the protractor - 45 degrees and just put that mark right  there on the edge of the line of the  board and then you'll scribe your line  and there's your 45 degrees the great  thing about the protractor is it can do  any degree from  one two ninety another great thing about  the square and a lot of people don't  know this unless your professional  contractor is what are all these numbers  for yeah common up here and then you  have hip value right here the common  stands for your common rafter lengths on  pitches of roofs and the hip value  stands for the hips and valleys that you  have in a roof.

And those rafters have to  be cut a certain way I'm going to teach  you everything that I know about all the  common okay we got a little model here  of a rafter and for demonstration  purposes let's just say that the tail of  the rafter down here uh maybe a squirrel  got into it and eight side of it off and  your face is falling down and it just  you know looks bad and you need to patch  this so you need a small section of  rafter here to scab back on the side.

So  you got something to mount your fascia  to so on this model here if you do not  know the pitch of the roof which is  you've got to know that to cut these one  really cool trick that you can do with  the speed square is take you a speed  square and a plumb bob and come up to  the roof of your building and take the  plumb bob and put it right there through  the pivot that we used earlier for the  pro chart protractor...

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