Question about plenum depths and sketch rectangles
Posted: Thu Dec 07, 2017 9:12 pm
Let's say for a floor my largest duct is 20" and my largest joists in the zone/space is 24". That would make my plenum depth 48" for the entire floor.
Going off the example of a 48" plenum depth. So your biggest joist depth is 24" and duct is 20" BUT lets say your section cut goes through 12" joists and not 24", (so smaller joists then what your plenum requires are what you're required to show because of where the section is cut).
Ideally when using sketch rectangles to lay this out, people typically follow the order or light fixture clearance, plenum depth and then place their joists in the drawings on top of the plenum depth.
Question: If my plenum depth is 48" and my joists are 12" (smaller than what is in the largest duct joist combo) would you draw your joists INSIDE the plenum depth sketch rectangle or resting on top of the plenum depth sketch rectangle like how pretty much every youtube video and tutorial shows?
My thought would be that you would draw a smaller joist that's being cut INSIDE the plenum depth sketch rectangle, because ideally a smaller joist would fit in there as you made the plenum depth account for a much bigger joist. And the whole point of this thing seems to be that you're drawing for the worst case scenario WHILE being efficient. If you put the small joist on TOP of the plenum depth (that's already accounting for the worst case scenario) aren't you technically overcompensating and adding 12" to what you already adequately have?
Any insight is helpful. Coach if you can please?
Going off the example of a 48" plenum depth. So your biggest joist depth is 24" and duct is 20" BUT lets say your section cut goes through 12" joists and not 24", (so smaller joists then what your plenum requires are what you're required to show because of where the section is cut).
Ideally when using sketch rectangles to lay this out, people typically follow the order or light fixture clearance, plenum depth and then place their joists in the drawings on top of the plenum depth.
Question: If my plenum depth is 48" and my joists are 12" (smaller than what is in the largest duct joist combo) would you draw your joists INSIDE the plenum depth sketch rectangle or resting on top of the plenum depth sketch rectangle like how pretty much every youtube video and tutorial shows?
My thought would be that you would draw a smaller joist that's being cut INSIDE the plenum depth sketch rectangle, because ideally a smaller joist would fit in there as you made the plenum depth account for a much bigger joist. And the whole point of this thing seems to be that you're drawing for the worst case scenario WHILE being efficient. If you put the small joist on TOP of the plenum depth (that's already accounting for the worst case scenario) aren't you technically overcompensating and adding 12" to what you already adequately have?
Any insight is helpful. Coach if you can please?