Storefront Attachment
Storefront Attachment
(OP)
Greetings,
I have a peculiar case which I am trying to analyze and I am lookin for some valuable input.
I have a curtain wall system that attaches to a steel beam. The steel beam has an opening behind it and spans 39'. The opening houses an escalator.
A concrete curb is present to attach the curtain wall. I am trying to use it as a composite section bending about the weak axis, using transformed properties.
Please let me know what you think of this.
Thanks
Anantha
I have a peculiar case which I am trying to analyze and I am lookin for some valuable input.
I have a curtain wall system that attaches to a steel beam. The steel beam has an opening behind it and spans 39'. The opening houses an escalator.
A concrete curb is present to attach the curtain wall. I am trying to use it as a composite section bending about the weak axis, using transformed properties.
Please let me know what you think of this.
Thanks
Anantha






RE: Storefront Attachment
RE: Storefront Attachment
What is the purpose of this concrete curb? It seems like the connection of the curtain wall to the steel beam will be made more difficult with it present.
In order to control torsion better, plus give more stiffness in the weak direction, why not use a large tube section instead of a wide flange?
Mike McCann
McCann Engineering
RE: Storefront Attachment
RE: Storefront Attachment
RE: Storefront Attachment
A couple of others:
How do you plan on attaching this at each end, any twisting accounted for? Welding the rebar to the columns?
Will this composite beam be shored? I assume so, there is no lateral bracing of the WF.
Have you checked the concrete beam for shear?
There will be biaxial stress on the section.
The stiffness of the section will change after cracking.
Your studs are working for composite gravity loads plus taking the upper wind force into the composite section, need to check this combined.
RE: Storefront Attachment
Why are there two steel columns at the escalator opening? Is this an expansion joint?
Do these column then span multiple floors with a concentrated load from the wind?
Are the outer columns concrete?
How is the steel beam attached to those columns?
RE: Storefront Attachment
2. Steel beam attached to the column using flange plates welded to the embed plate for fixity. Also a detail with top and bottom plates welded to the shear tab (creating an I) to attach to the embed plate
3. Columns needed for architectural reason. No expansion joint
4. Composite beam is unshored. The beam is intended to span 39' in its weak axis with no bracing.
RE: Storefront Attachment
The sketch appears to show a horizontal beam running between the rectangular columns. But it looks like this horizontal span is interupted by the pair of steel columns. Is 39 feet the distance between the rectangular columns?
RE: Storefront Attachment