Roundup
Posted by: craig.parker
I remember there was a discussion about this last month or so, but I’m back here. Where there aren’t THAT many measurements, and I always want to make sure there are enough, I’m leaning toward my 16” on-center floor joist formula being roundup([MeasuredLinear]*.75+1)
I’ve scaled it out manually, and Stack’s coming up with what I am (39 joists for a 50’ measurement).
Any thoughts? Dad jokes?
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Comments
Reply by: craig.parker
On exploding, I’d been wondering this anyway. How can I get it to explode the (in the case of horizontal grids) top and bottom border lines as well as the ones in between? Using Stack’s Floor/Ceiling Joists 2x10 (Single Length) - Linear assembly after exploding an area, I was two joists short. I’ve noticed the same thing with a strapping assembly I made. So far I’ve just been copying and pasting a bit to make up for it.
Reply by: Jason Armstrong
You may want to explore changing your coverage from .75 to 1.0. By the time you add corners, king/trimmers, and wall partitions this works better than 16”+1. I do keep the +1 in mine.
Dave Elfers, maybe you could help craig with this if it is something he could use? Don’t just cut and paste! Pay attention to the plate counts in the formulas. I use six, this should be reduced for normal framing.
craig.parker wrote:
I had not seen those. Looks like it does about the same thing mine does, but mine skips the sqft measurement and exploding.
On exploding, I’d been wondering this anyway. How can I get it to explode the (in the case of horizontal grids) top and bottom border lines as well as the ones in between? Using Stack’s Floor/Ceiling Joists 2x10 (Single Length) - Linear assembly after exploding an area, I was two joists short. I’ve noticed the same thing with a strapping assembly I made. So far I’ve just been copying and pasting a bit to make up for it.
In this case, you should also explode the perimeter, then delete the sides perpendicular to the joists. That will give you the extra 2 joists that were missing.
craig.parker wrote:
I remember there was a discussion about this last month or so, but I’m back here. Where there aren’t THAT many measurements, and I always want to make sure there are enough, I’m leaning toward my 16” on-center floor joist formula being
roundup([MeasuredLinear]*.75+1)I’ve scaled it out manually, and Stack’s coming up with what I am (39 joists for a 50’ measurement).
Any thoughts? Dad jokes?
This is fine I think. I prefer to use something like this:
[MeasuredLinear]/(16/12)+1
I guess I’m a little more “precise“ like that. But mathematically it’s the same thing as *.75.
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