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Attached is the revised sketch.https://files.engineering.com/getfile.aspx?folder=2dc9c8dc-520d-4186-9903-42423bc08df2&file=IMG_20200112_074619625.jpg

The Owner wishes to remove the columns at the outboard corner. Perimeter beams are an option as there are building columns at the corners. See the revised sketch with column locations, attached. FEA analysis of the balcony slab is an option, but I would prefer to dig into the methodology for...

I've been tasked with analyzing a conventionally-reinforced concrete cantilevered balcony at the corner of a high-rise condominium. The balcony, and others in the stack, had been supplemented with an HSS column at the outboard corner to remediate purported excessive deflection. The Owner now...

Hi, I am working working on the strengthening of a new opening in a 2-way RC slab slab. We had originally designed the strengthening using FRP, but the Contractor balked at the cost, cut the opening, shored the slab, and now we have to come up with a cheaper solution. We are looking into...

Hi, Does anyone have a good reference for determining required bond length for a steel strip bonded to concrete? Thanks!

That's it. Thanks!

Does anyone have a clear copy of the 1997 AISC Specification for the Design of Steel Hollow Structural Sections? I have a scanned copy from AISC that is unclear, specifically the equation for F_cr, Equation 4.2-2. In particular the lambda squared. It is unclear if it is lambda, lambda_c, or...

It's not huge and I was planning to just treat the walls and cantilevers, but I wanted to make sure I wasn't missing anything. Thanks.

Hi, Does anyone have a reference for designing circular reinforced concrete planters? Thanks!

This is correct. I noticed a mistake in my spreadhseet and it now works for A1 and A2. Thanks.

Do I have this right? The results match for A1, but not for A2.

I get that; it's the actual derivation of A1 and A2. The second page shows a sketch, but I am unable to replicate the values.

Hi, I am working through @slickdeals calculations posted here. Can anyone clarify the derivation of A1 and A2 on the first sheet? Thanks!

Got it. Thanks!

Hi, I am working on an interaction diagram for a circular, tied concrete column in accordance with CRSI's Design Guide for Reinforced Concrete Columns. For pure bending, CRSI states that there is no closed-form solution to determine the depth of the neutral axis and that a trial-and-error...

Hi, I'm working on adding an opening to an existing two-way RC slab. The opening is in a column strip and proximal enough to an existing concrete-filled steel tube column that the perimeter of the critical section for punching shear is reduced. Can anyone recommend a reference for steel shear...