McGruber22 - if going with cast in place slab on temporary forms, supported by steel beams, would you do one slab pour for a 24'x16' area with no control joints? I was not planing on doing composite beam action. How do you detail concrete slab supported by steel beams? I won't have headed...
McGruber22 and Ron - I value your insight and appreciate you taking the time to answer these tough questions. McGruber22 - do you have an example of the concrete mix with 0.38 w/c ratio that you have been using? Perhaps a concrete mix submittal? Being that water intrusion issues are so...
MacGruber22 - I was planning on specifying rebar because there is a better chance that it will not just be laid down on top of the deck and actually be placed in the desired position. For additional crack control, I am adding fibermesh which has performed well historically on jobs that I've...
Kootk - that's exactly what I read earlier today - the verbiage that I plan on using on my drawings is "if vapor impervious materials are applied to top of slab, metal decking must be vented".
ajk1 - I agree with you, but I also think the best thing for me to do is to clearly state that waterproofing is outside of my responsibility and that I recommend a waterproofing consultant be retained. I personally don't feel confident specifying waterproofing items and have not been asked to...
one other question that I had was what is the best practice for crack control for this mezzanine exposed to weather? I've read most of the threads related to this topic, but there doesn't seem to be a general consensus. This deck is 16'x24'. I'm planning on showing it without joints. I'm...
Kootk - guess I'm damned if I do, damned if I don't. I do see your point. My primary responsibility is to design the structure so that it remains intact. That means that if I anticipate water intrusion into the deck that I should probably vent the decking. This way if water gets through, it...
Ron - I was kind of thinking that myself. Thank you and I think that is a great recommendation.
Kootk - I could see that if they didn't water proof and I called out for vented deck and they got cracking in the slab and water poured through the deck that I would get fingers pointed at me. If...
It was my understanding that the venting is to allow moisture to dissipate out of the bottom because the top is completely sealed. If the top is not sealed and water gets through cracks, then it would just go right through the deck, so it doesn't seem like venting would be good to me. I think...
I honestly don't want to get involved in the waterproofing period. It is not my specialty. That would be a building envelope consultant and I am planning on putting the following note on my drawings:
"It is the understanding of the structural engineer that the elevated floor shown on this...
Kootk - for sure - definitely don't want to count on the deck.
Teguci - I'm strongly urging for them to properly waterproof the slab. I don't think they realize how much water can get through a small crack.
This is a patio at a restaurant and they will have bathrooms below it. May not be...
Kootk - thanks for the info about pre-punched holes. I didn't know that.
Ron - there isn't an architect involved on this one and the code issue that you brought up is a good one. I recommended a roofing membrane to the client (contractor) and they told me that the owner is ok with some...
I have an exterior mezzanine that will have an occupied space below. This mezzanine needs to be completely watertight. The problem is that metal deck below the concrete and waterproofing above the concrete traps all the moisture of the slab inside. Has anyone ever had to waterproof an...
