Odd Roof Structure

[SteelPE]

I have an architect client who wants me to look at a project with him. The project may include renovation of an existing structure. The existing structure is quite old and is a mess of odd additions. Currently we are pushing the owner to not make any modifications to the existing structure. We hop eliminate the rabbit hole of trying to figure out the capacity of the existing members (a part of the project I have flat out told the architect I do not want to be involved with).

The architect sent me some pictures of the existing (which are hopefully attached). One portion of this building has what appears to be arched concrete tiles that span between steel beams. In some areas, the roof appears to be badly water damaged.

Has anyone seen this type of construction before? In some areas, it appears as if the concrete tiles were completely removed in favor of what appears to be wood planks.

 

[Rabbit12]

I have seen these in-fill tiles one time but can't for the life of me really remember any details about the project. I believe those are hollow clays tiles between your steel beams. I seem to recall they were maybe an early fire-proofing technique.

 

[r13]

I think you can contact the author of the linked thread. Link

 

[Celt83]

Terra Cotta Arch/Flat Arch.

StructureMag has a good article:

https://www.structuremag.org/wp-content/uploads/2014/09/C-EngineersNotebook-Stuart-Dec071.pdf

The Architect and Builders Pocket Guide by Kidder has some span tables think SlideRuleEra has a copy on his site.

My Personal Open Source Structural Applications:

https://github.com/buddyd16/Structural-Engineering

Open Source Structural GitHub Group:

https://github.com/open-struct-engineer

 

[SteelPE]

Thanks for the help. Based upon the description provided by Rabbit, I was able to find the structural article Celt83 referenced (I found it just before he provided the link). Interesting enough, if you look at the second picture you can see the tie rods (initially dismissed as electrical conduit). It's the rod that is 1/2 embedded in the tile 1/2 out of the tile.

I don't understand why portions of these tiles were removed. Removal doesn't seem to have been the best idea. Now it appears as if we have many "end" bays.

Does anyone have a link to SlideRule's tables. A Google search pulled up the second reference found in the Structural Magazine article. According to the article it looks like the only way to figure any capacity is based upon the tables provided in the two references or some sort of load test.

 

[r13]

Link to SRE library. Link

 

[Celt83]

here is the Kidder Book:

[URL unfurl="true"]https://books.google.com/books?id=DWsmAAAAMAAJ&printsec=frontcover&dq=%22Architects%27+and+Builders%27+Handbook%22&as_brr=1&hl=en#v=onepage&q=%22Architects'%20and%20Builders'%20Handbook%22&f=false[/URL]

edit: eng-tips kept breaking the link, copy all of it from that code block, takes you to a google books page with the full document.

My Personal Open Source Structural Applications:

https://github.com/buddyd16/Structural-Engineering

Open Source Structural GitHub Group:

https://github.com/open-struct-engineer