Floor defaults in Default Settings

[TeaMan]

I am using HDP 2023.

 

I have some questions about setting the floor and trusses in Default Settings and am looking for some advice.

First, I clicked on the Wrench icon (Default Settings) then "Floor/Ceiling Platform" then Edit, or expanded Floors and Rooms, then expanded Floor Levels, then clicked on "1st Floor" then Edit.  Nearly the same thing can be done in either place.  The second gives a diagram that makes it easier to see.

 

Going lower in the settings for the 1st floor using the second method is the floor area.  Clicking edit goes to a dialog that shows layer #1 and layer #2.  Layer 1 is the floor OSB which is where my first questions comes.  I am building a workshop where I'd like to make the floor level match a concrete floor in an adjacent room.  My thought was to use 5/4" OSB flooring in the area with a wood floor so it can help support the weight of woodworking machines.  I haven't decided whether or not I am going to put a second layer above the base floor, or if I will just leave it as OSB.  I am leaning on leaving it as OSB.  So, would I change the 3/4 in the Layer #1 to 5/4 here?  Staying with the assumption of nothing above the OSB, going back to the diagram and leaving the default 3/4 for the OSB, 7/8" is shown on the diagram which would be 3/4" plus 1/8".  I'm trying to figure out what the 1/8" is for or shat the 7/8" is showing.  Then if you zoom in on this diagram you will see a line that the dimension of 109-1/8" is pulled from that is slightly below the lines that appear to be showing the flooring size or 7/8" area.  I'm trying to figure out also why there is a gap between the truss and the 7/8" area?  It's hard to tell, but it could be around 1/8".  Can anyone shed light on this?  The dimension of 12-5/8" for the truss is pulled from the same line as the 109-1/8" dimension is pulled from but that gap appears to be between the truss and possibly OSB flooring.  This seems confusing as to what the gap is for.  Another question about the diagram is that the OSB flooring doesn't appear to extend below the wall if the two lines to the left are to depict the wall framing.  It stops at the wall framing.  Doesn't the base OSB floor that sits on top of the truss extend to the outside of the building and under the wall framing?  This is how I've always seen construction.  Maybe the lines to the left aren't the wall framing.  Can anyone shed light on this?  I'm trying to understand this so I can understand what dimension to put into the "Rough Ceiling Height" for different room heights.  I assume the defaults on this diagram are for a 9 foot ceiling.  I'd like to experiment with 10 ft, 11 ft, and 12 ft ceiling heights for this shop.  I attached three JPG files of the diagram, first zoomed out showing the defaults and then two zooming on the left corner showing the gap I spoke of and where what looks like the wall framing doesn't sit on top of the OSB floor.

 

For the three JPG files, here is the explanation:

1. Defaults zoomed out shows what the diagram looks like without changing any defaults.

2. Defaults showing Gap above truss and below OSB floor I drew a circle around where you can see the line the dimension is pulled from and what appears to be the OSB floor.

3. Defaults showing floor not going under wall framing.  Here I zoomed and drew a circle around the area where you can see the trusses extending under what appears to be the wall framing and the floor stops at the wall framing.  The dimension of 12-5/8" appears to be the Truss depth and 7/8" appears to be the OSB floor thickness.  The problem I have here is if the base OSB floor doesn't extend to the edge of the truss and below the wall framing, The Rough Ceiling Height of 109-1/8 inches wouldn't be correct I wouldn't think.  Maybe I'm totally miss-understanding the diagram.  Hopefully someone can explain it to me.

 

Another possibility would be that the 12-5/8" is showing the truss framing of 11-7/8" plus a 3/4" base OSB floor that goes under the wall framing.  If that is the case, the rough ceiling height makes sense.  But if that is the case, what is the 7/8" on the diagram showing?  To both the left and right of what appears to be the wall framing plus possibly sheetrock and has a line that is approximately 1/2" from the framing and sheetrock.  What is this showing? Then at the bottom of this same area appears to be approximately a 3/4" area that goes from what could be the bottom of the wall framing, then up inside that framing.  Then there is another line significantly above this line.  What is this line for?  Would this possibly be showing molding?

 

My next question is about the floor trusses.  I would like to use trusses that are built from 2X4's and are open inside with structural supports.  They are built by truss manufacturers, and I had them in previous houses I had built for me.  I'm trying to figure out what they are called in HDP 2023 so I can choose the right one.  Going back to the dialog when clicking Edit in the floors section next to "floor Structure", you can choose framing.  Would I choose Lumber here, or would it be Engineered Lumber?

 

Hopefully I haven't explained this in a confusing way.  Thanks for any help to better understand this diagram and how to accomplish what I'm trying to do.

 

Ed

[Garybills]

Here is how the default floor structure is set. The Open Web Floor Trusses will have to be drawn manually in HDP 2023. Hope this help you understand how to the floor structure works.

 

 

[TeaMan]

Thanks Garybills.  I was hoping the open web floor trusses were a standard truss that could be chosen, but it's something that I might be able to work with by using another truss and let a contractor know it's an open web truss.  I'm curious how you went about drawing them though.  That would be off topic and maybe another discussion. But did you draw one and make it a block somehow that you could then copy and replicate?

 

Your first drawing makes perfect sense on the outer wall, stud, sheetrock and base molding.  This answers most of the questions about the wall side of the diagram. One of the questions that I had before is what went into the number 109 1/8" on the left side of the defaults drawing that I uploaded?  Looking at the top and bottom, it doesn't appear to be anything showing a bottom plate or top plates.  So, would I assume that the 109 1/8" number includes the normal stud length plus 1 1/2" for a bottom plate and 3" for a double top plate?  So basically 104 5/8" plus 4 1/2" coming to 109 1/8"?  I think what might be making it confusing is that the bottom and top plates are not shown.  Is this correct?   

 

I zoomed on the drawing in the defaults and edited the floor structure, changing the 3/4" OSB to 5/4" OSB and was able to see that the 12 5/8" dimension increased to 13 1/8" so it answers the question that the truss and OSB are added together in that dimension.  In the diagram in the defaults, the diagram does show a rectangle for the truss dimension and another rectangle for the OSB.  They are not broken out into separate dimensions but shown as two separate pieces.  So, that is now clear to me.

 

The finished floor is still a little confusing.  I also changed the 7/8" number to 5" so I could see a large change in the diagram.  It did move the line that comes in at the bottom of the Base Molding up to 5" and pushed the base molding up by 5".  It's now clear that this portion of the diagram is for the finished floor inside the wall studs which makes sense.  What is confusing on the diagram which can be seen clearly on the center JPG that I uploaded that has the red circle drawn on it and arrow, is the line going across the diagram from the top of the base molding on one side to the top of the base molding on the other side.  What is this line showing?  I did choose Moldings on the left and changed the height of the base molding to 6 1/2" to be able to see a large change in the diagram and the box representing the base molding on both sides did increase in height by that amount, and the line at the top of the base molding also moved up.  Again, I'm confused as to what that top line is showing.  Any insights?  Your drawing with dimensions on it doesn't show this line, but he defaults drawing in HDP 2023 does show it.

 

Finally, the other thing I'm still confused about is shown again in the jpg that I uploaded with the red circle and arrow drawn on it.  You really have to zoom on the diagram in the defaults to see it, but there is a line just above the truss and OSB and is inside of the sheetrock for the walls.  I can't figure out what this line is showing.  It creates a small gap below the finished floor and doesn't change if the Floor Finish number is changed, nor if the Floor Structure numbers are changed.  What is this line for?  What is it showing?  It's what the arrow in that JPG is pointing at.

 

The last thing that may not be important.  On your drawing you uploaded with the dimensions on it.  Across the truss there are some numbers at a diaginal that are hard to read.  It kind of looks like 7 3/4" - 10 5/16". What is this?  I can't figure out what it is showing.

 

Thanks again,

Ed