- To create the roof truss, I'm gonna go ahead
and start a new part which I called 2.1.SLDPRT.
And I'm gonna start a sketch on the front plane.
Now I'm gonna use a center line here
to define the height of the roof.
And then I'm gonna use a regular line
to define the slope on either side.
And then we're gonna connect things together here
by making a line from here, over here to there.
And notice you don't have to make it horizontal at first.
You can always go ahead and add that in later.
You can always go ahead and click on the center point here
mid point here and say, make a Midpoint.
I can make this line here and that line there equal.
And it completes like that.
So now I define things, everything looks pretty good.
So first things first, let's add some dimensions.
I know I want six feet here
so I type in 6'
That defines the shape.
The width of the roof is gonna be 24 feet.
Now I could define this stuff in context as well,
inside of the assembly but right now
I'm just gonna lay it out 'cause I know the exact size.
The overhang is gonna be
from this point here to this point here.
It's gonna be six feet.
And notice I changed it on one side,
it automatically updates on the other side.
In fact, if you wanna change it to four feet,
both sides automatically update.
And so you can make the design very dynamic
by easily changing things and the Weldment
will automatically update to any of these changes.
Once you have it looking pretty good, let's go ahead
and add in a couple of other trusses here.
So I'm gonna go from here to the,
roughly midsection of that line there.
I'm gonna make a line directly across over to here.
And then back down.
And this one is gonna be for construction only.
So I'm gonna click on "For construction".
This line here, the vertical line, though
actually is not gonna be for construction
so turn that and switch that over.
And then I can define this shape here.
Or that angle.
So let's go ahead and type in 25 degrees.
And there it is.
So that's looking pretty good for our truss section.
Now exit out of the sketch.
Now let's go ahead and define what that shape's gonna be.
So I'm gonna go up to Weldments.
I'm gonna go to Structural Member.
I'm gonna choose ansi inch.
I'm gonna choose a c channel.
I'm gonna go ahead and choose a...
C8x11.5, so it's an eight inch channel
at 11 and half pounds.
My first structural member is gonna be this one
going directly across.
And as soon as I choose that, notice it's
not only at the wrong angle but also using the wrong point.
So let's go down here and Mirror the profile
on the Vertical axis.
And actually rotate it around here, so 90 degrees.
That's looking a little bit better.
And the bottom corner there,
I think that is what we're looking for.
And I wanna make sure that the back of my channel
is against these vertical lines here.
So it is, that's what I'm looking for.
So that one looks pretty good, click on ok.
Double check, all right great.
Do it one more time, Structural Member.
This time I'm gonna choose the same material
but I'm gonna choose this line here.
And again it comes in the wrong angle
so go down here to 90 degrees.
So go down there to 90 degrees, adjust that angle
and then click on "Mirror profile".
Mirror it over the Vertical axis.
And now the materials are back to back, which looks good.
And then I wanna click on this other line here.
So that material's gonna be going
down the other side, same way.
And it nicely adds me a miter joint at the very top.
Looks pretty good.
Go ahead and click on ok.
There's a couple different ways to do Weldments.
Now you can create individual Structural Members
or you can create multiple groups
inside of the Structural Member.
So I'm gonna show you both ways here.
The next one I'm gonna do is one more Structural Member.
Again, choosing the same material.
This time I'm gonna choose this vertical.
Again, on the wrong side of the material
so let's go ahead and adjust that angle.
So let's type 90 degrees first.
And that is...
Yeah, that's what we're looking for.
So just make sure we're looking at the top here
and it looks pretty good.
And I wanna make sure though
that I'm not on that corner.
But I wanna Locate Profile
so I'm using, really, the center point.
All right, not too bad.
But actually, the problem is, is really I want this to be--
So I'm looking a little closer.
Actually, I don't want 90 degrees, I want it 270.
Or I could Mirror the profile as well.
Put it over here, that's what I'm looking for.
Is having these legs on the same side
and having these ones back to back.
Perfect, that's exactly what I'm looking for.
Sometimes you have to spin it around a few times
and make sure you're getting the profiles
in the right orientation for what you're looking to do.
Once you're happy with that one,
you can click on New Group.
I'm gonna choose this line over here.
Do the same thing, I'm gonna rotate this by 90 degrees.
Nope, so Mirror profile now over the Vertical axis.
That's the right orientation
but I want to change the way it's located.
So I don't want to use that bottom corner there.
Let's try that midpoint, see how that looks.
And I think that's still gonna be too low.
So let's go ahead and use this bottom corner.
One more time, Locate Profile.
This time I'm gonna click on this bottom corner.
And sometimes you just have to play with it a little bit
to see what's gonna look best
and how that whole assembly is gonna come together.
That one looks pretty good to me.
Let's go ahead and choose this other line over here.
It's gonna be exactly the same thing on the other side.
That looks great, let's click ok.
And that's how everything's going to be coming together.
And now notice these two are mitered up to the corners
of this piece of channel coming down here.
So it allows us to weld along the bottom here
or on the side here and connect everything together.
Same thing over here.
I can do a nice weld on the backside.
Over here though, we do have a problem
because these pieces are intersecting.
And we can go back and trim and clean up
those corners in the next set of movies.