open web steel joist on metal stud wall?
open web steel joist on metal stud wall?
(OP)
I have a case where the architect wants to bear 40ft span open web steel joist flat roof on a metal stud wall. Does anyone know where I can go for design guidance on the metal stud wall. I can tighten up the joist spacing to reduce the point load. at 3' spacing 3K point load to wall.
Or is this just one bad idea?
Or is this just one bad idea?






RE: open web steel joist on metal stud wall?
www.SlideRuleEra.net
RE: open web steel joist on metal stud wall?
RE: open web steel joist on metal stud wall?
Most flat roofs have a parapet which is easy to accomplish with curtain wall studs running past the spandrel. With a bearing wall stud system, your parapet system will have to be "sticker" studs with a complicated attachment (welds, kickers, etc.)
I completely agree with UcfSE that you will need some sort of continuous header to distribute the point loads from the bar joist seats into the studs. The studs perhaps work with this large axial load (and any eccentricities); you are probably looking at 8" studs depending on your plate height.
Your easier and thus cheaper structure is probably bar joists at 5' or 6' o.c. with a metal deck roof with steel spandrel beams and stud curtain walls. The wall details are traditional "no brainers" and the steel beams make a great diaphragm chord.
RE: open web steel joist on metal stud wall?
sundale - when you say steel spandrel beams do you mean on top of the metal stud wall or a typical steel frame with columns?
RE: open web steel joist on metal stud wall?
RE: open web steel joist on metal stud wall?
Modifying an existing building with a "pop top" is an entirely different matter. A 1970's building does not meet current code requirements "as is", much less with another story of gravity and lateral loads. Have fun and I hope you guys have a good structural fee.
RE: open web steel joist on metal stud wall?
No drawings on the existing masonry which is most likely non reinforced!
This is going to get ugly. I may have to suggest jumping over, around or through the lower building with a new braced steel frame and foundations. The architect of course has no idea this is coming. And the added cost could kill this project.
RE: open web steel joist on metal stud wall?
www.SlideRuleEra.net
RE: open web steel joist on metal stud wall?