Astructengr
Structural
- Jun 20, 2022
- 6
I have an unusual situation. I have a steel building (HSS columns, W beams, Open web joists, plus some special joist profiles). The Arch is insisting the columns be in the same plane as the exterior metal studs. There are some locations where there will be braced frames, which will have the studs break on them, and be designed as girts. My main issue I am running into is how to detail the slab/footings and to use a turndown versus floating slab? Anyone run into a situation like this and how did you detail it? Frost is 18". I have attached a partial plan as well as some details I have seen.
Issues I have thought about,
1. Cracks at the turndown.
2. Column blockouts.
3. Out of plane wind on some type of stem wall if slab floats.
4. Whether to put the columns on piers and if I do, how to deal with in plane shear transfer at braced frames.
5. If columns go all the way to their footings, will concrete/grout at blockouts be sufficient corrosion protection or should bottom of columns be HDG. Constructability of braced frame if it goes to footing.
Issues I have thought about,
1. Cracks at the turndown.
2. Column blockouts.
3. Out of plane wind on some type of stem wall if slab floats.
4. Whether to put the columns on piers and if I do, how to deal with in plane shear transfer at braced frames.
5. If columns go all the way to their footings, will concrete/grout at blockouts be sufficient corrosion protection or should bottom of columns be HDG. Constructability of braced frame if it goes to footing.
