Floor Trusses

[jeperry]

The is no option in the 'Structure Tab' which causes problems with the walls when you are planning to use a top cord mounting truss foe the floor. Has anyone come up with a work around for this?

I end up using an interior model, a differemt exterior model and draw cross sections manualy in CAD.

Sager Notebook
XP Pro 32bit
Intel Core2 Duo T9400 @ 2.53 GHz
NVADIA GeForce 9800M GT
Memory 2 Gig

[dshall]

The is no option in the 'Structure Tab' which causes problems with the walls when you are planning to use a top cord mounting truss foe the floor. Has anyone come up with a work around for this?

I end up using an interior model, a differemt exterior model and draw cross sections manualy in CAD.

Sager Notebook
XP Pro 32bit
Intel Core2 Duo T9400 @ 2.53 GHz
NVADIA GeForce 9800M GT
Memory 2 Gig

I have not tried this but.....

Set your floor assembly at 2-1/2" (depth of 2x4 truss top chord and 1" of plywood, this will also define the top of your top plates) then put a ceiling plane in about 12" below f.f. (this should define bottom chord of truss), now try to build your floor trusses.

Good Luck!

[carpenterguy]

I am glad David knows what you are asking about because I sure don't.
I am sorry and don't mean to seem dense but but I didn't understand the post at all and I re-read it a few times.
Could you elaborate a bit more?
Thank you.
Andy.

[dshall]

I am glad David knows what you are asking about because I sure don't.
I am sorry and don't mean to seem dense but but I didn't understand the post at all and I re-read it a few times.
Could you elaborate a bit more?
Thank you.
Andy.

I believe he wants floor trusses that are top chord bearing in lieu of bottom chord bearing. Therefore the bearing walls would need to frame up to underside of a floor truss top chord vs. stopping at truss bottom chord.

Since the walls frame to the underside of a floor assembly, by defining the floor assembly as I have suggested (2-1/2" thick) , the walls should frame up past what will be defined as the ceiling via the sloped ceiling tool (I forgot to say to alter the ceiling pitch to a zero pitch which will then define the bottom chords of the trusses).

Disclaimer: I have not tried this yet, but it seems to make sense.

[dshall]

I have not tried this but.....

Set your floor assembly at 2-1/2" (depth of 2x4 truss top chord and 1" of plywood, this will also define the top of your top plates) then put a ceiling plane in about 12" below f.f. (this should define bottom chord of truss), now try to build your floor trusses.

Good Luck!

Well, that does not work.

[dshall]

Ceiling planes not part of equation.
Define floor assem. as shthg depth plus fj depth
Build floor joist to interior face of wall
In elevation view drag walls to underside of top plate or underside of floor shthg.
done

[jeperry]

I'd like to thank you all for solving the problem.

Default Settings:
Framing: 1st tab
Subfloor for Floor 2: Joist Width and Depth are the values of the top cord of the truss.

Floor 1 Defaults: Ceiling height is set to the distance from the floor to bottom of the top cord. (In this case 12')

Room DB Lowered Ceiling is set (9')

Exterior Walls come out correctly and the 2nd floor is also correct.

The BOM will require little adjustment to correct for interior stud length.

I will post the finished Xsect and a couple of renderings in a week or so. I haven't tried it before but will make adjustments to the interior framing to allow for the truss and see if the BOM records them.

I only used Xsections done in CAD and not the Auto Xsect of the software. It doesn't take that long and looks better.

Thanks again.