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KootK - in reference to your reply: 1) Per dik and JLNJ, I have considered the fact that the support has settled but I am not seeing significant cracking at other areas to support that therefore I have been thinking JLNJ may be correct.

Hey all, I am dealing with a concrete beam on a building that has some deflection (0.5" > 0.469" per L / 480) at the quarter span of the simply supported beam. I did my calculations and the maximum deflection calculated of approximately 0.25" at the midspan matched what I measured in the...

Hey all, I am installing some aluminum metal panels on the outside of a building. Note my client does not want the bolts or nuts to show that connect the panel to the building, does anyone know of a good product to cover the bolt head / nut that is used for outdoor applications? I saw caps...

Wow - thanks guys! I am going to look into these codes now and will be a huge help. RSB

Hi All, I am working on an old reinforced concrete beam that we believe is from the 1910s. We have no construction drawings or anything to go off of except the field measurements we have gotten so far. I believe that the first reinforced concrete code was published in 1907, does anyone...

Hi All, Am dealing with a heavily deteriorated spandrel beam on the perimeter of a building that has seen extensive water infiltration. The water infiltration has exposed the stirrups and longitudinal reinforcement at the underside of the spandrel beam. Additionally, the outermost...

Hotmailbox - that is awesome! I love to see these types of things. EZBuilding - this is what I am currently analyzing with, thanks for the help.

Thanks Jayrod, you make a good point and I will definitely consider that. Yep - I am playing architect today, I may have to reach out to an architect friend and see. Appreciate the help! RSB

When I said 225 pound per person per foot, I am implying a 225 plf Live Load is permissible at this section before yielding. I originally analyzed it for 100 psf which is the maximum for my situation per the IBC 2018, the balcony is passing consistent with the IBC load combinations; however I...

Yes however I do not know what the interior occupancy load factor is, this is where I am getting hung up. I am almost certain that this will be controlled by egress, currently the section can take 1520# along the 6.75 long span before it yields. This is equivalent to a 225 pound person per...

Hey all, I am working on calculating the capacity of an outdoor, reinforced concrete cantilevered balcony on a high rise. Ultimately I will need to post the balconies based off of an allowable occupancy and an allowable storage load.... I have calculated the capacity of the balcony and...

Hey guys, I receoently drafted up a conceptual idea I have for a product which will enhance similiar products that are popular in the market. Note I am a structural engineer that designs bridges and buildings but realize that I can apply my skills to general consumer items which I drive my...

I agree with you - the push back is coming from my manager but they can't justify/prove to me how to minimize the rebar size... RSB

Hey all, I am providing a concrete encasement at the bottom of a steel column to protect the column from the exposure to dirt, salt, etc. Note this will not be structural since I have designed the other components to take the full loads. I used ACI to calculate the required area based off of...

I ran into something the other day and unfortunately don't have access to my physics book right now... I am doing an analysis on a post where they installed a new speaker system to a railing post. The speaker is very high in the air (big lever arm) and therefore when you push against the post...

Ha - the handrail is only one of the issues with this catwalk and yes, one of my least concerns. The constructability is a nightmare but I am discussing with the client/design engineer what the best solutions will be, this does not appear to be it! Tune in next time... RSB

Here is a rough sketch...https://files.engineering.com/getfile.aspx?folder=8049cb87-d2e0-4096-a09f-776bbc1304fd&file=IMG-4684.jpg

Yep - that is correct.

Swinny GG - Yep! This is an enclosed mezzanine however, the drop ceiling below the catwalk cannot be relocated thus if a worker were to fall off the catwalk and through the ceiling they would have a 18' fall to the concrete slab below. The guardrail is currently proposed at 34" but that...

Hey all, I am reviewing a catwalk system where a guardrail is required however, there is an existing ceiling 40" above the top of the cat walk grading and therefore the required 42" guardrail cannot be obtained due to this constraint. With this being the case, should the guard rail be...