It's actually fed from DB-CBE feeder #8.
Your right. I actually took it off and routed it from DB-CDE but when I was pasting it here saw that quickly,
As is often the case, there could be so many more things to consider here. In some cases I have informed you that we need more information, but here I think it would be hard to. My first thought here is questioning whether this stairwell is subject to the rule that only conduits associated with the stairwell are allowed in it. I bet it is. Second, are the walls you want to core fire walls? Do you need to be concerned with drilling through rebar? Then, if firewall, then what assembly do you want to use to seal? That is a start anyway.
As is often the case, there could be so many more things to consider here. In some cases I have informed you that we need more information, but here I think it would be hard to. My first thought here is questioning whether this stairwell is subject to the rule that only conduits associated with the stairwell are allowed in it. I bet it is. If so, then the gallery spaces must be integral with the stairwell, or the entire installation is illegal. Second, are the walls you want to core fire walls? Do you need to be concerned with drilling through rebar? Then, if firewall, then what assembly do you want to use to seal? That is a start anyway.
We've run vertical risers in stairwells before. They typically get a 2 hour finish installed over them.
How would I know if that rule applies? I am excluding and scanning or xray, will be done by others. Wall are fire rated and will look in spec as to what is needed. Probably 3M fire caulking.
The building code may limit what type of vertical risers that can be run in a stairwell. The electrical code doesn't care. We would core drill our holes, run the risers, and then the carpenter would box it in with a 2 hour rated wall.
Good to know, the OP is on the 2008. Also if it's behind a 2 hour wall is it actually in the stairwell?
No idea...I would expect that most of the time the stair is designed to the minimum possible dimensions, so if that would be the case, there would be no room for a wall.
I agree. We've run risers in stairwells in old buildings but the minimum egress clearances had to be met after the conduits were enclosed.
Agreed, because then they aren't technically in the stairwell.
No, that is the solution. I have done it multiple times in hospitals.
I am not picking on you. I would like to give you advice, regularly. That said, I often don't know where you question is coming from. I think it is from the perspective of the estimator. If so, my advice is don't worry about what isn't on the plans. If as, I think we have determined, the stairwell is enclosed in a fire barrier, either include money for fire caulking or exclude in your proposal. I am surprised you would exclude fire coring and x-ray, I would assume, unless there are multiple systems penetrating these walls the CM would want you to carry those costs. Regarding the "no conduit in a stairwell" that is a perfect opportunity for a change order, unless politically it is better for you to have the owner's of the CM's back. This is all about strategy. Back to the other, if you are estimating, just figure on coring each hole, and including mineral wook and fire caulk for each penetration
I am not picking on you. I would like to give you advice, regularly. That said, I often don't know where you question is coming from. I think it is from the perspective of the estimator. If so, my advice is don't worry about what isn't on the plans. If as, I think we have determined, the stairwell is enclosed in a fire barrier, either include money for fire caulking or exclude in your proposal. I am surprised you would exclude fire coring and x-ray, I would assume, unless there are multiple systems penetrating these walls the CM would want you to carry those costs. Regarding the "no conduit in a stairwell" that is a perfect opportunity for a change order, unless politically it is better for you to have the owner's of the CM's back. This is all about strategy. Back to the other, if you are estimating, just figure on coring each hole, and including mineral wool and fire caulk for each penetration. If you installation team comes up with a cheaper way, it will offset the cost of somewhere that you underestimated.
Thank you!!!
