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Thanks everyone for the responses. I really appreciate it. Apparently the truck tickets are showing the water held back and the field reports show no water added on site - they are supposed to balance. As suggested we will keep a close eye on the slump, air content, and temperature to make sure...

A concrete supplier on our project has been holding back water at the plant and not adding water on site. This obviously means that we aren’t hitting the target w/c but concrete will have higher strength. GC has stated the concrete is perfectly workable. This concrete is for spread footings and...

Yes exactly. Just not sure how you created that. And it makes sense that all tables need to be checked.

How do engineers create a beam end reaction table that provides a design load (LRFD) for each beam depth: W12, W14, W16, etc.? Would like to create one of these. My firm only uses the AISC tables but I think this is conservative. Thanks!

Would anyone be willing to tutor me on a few concepts I'm trying to improve on. I'm looking to get better at connection design, particularly braced frames and would even like to learn about buckling restrained braces. Thanks in advance!

Hi, When I first started working I found RISA to be the most difficult software to use. Risa uses 6 degrees of freedom as follows: 1) X Translation 2) Y Translation 3) Z Translation 4) X Rotation 5) Y Rotation 6) Z Rotation Here are my tips: Pick an axis system that works for you and your...

JAE please do not comment on any of my posts going forward. I find your behavior very hostile and you contradict the spirit of Eng-Tips. Instead of trying to help people you consistently shoot them down. I do not want to associate with such foul people. Thank you kindly

Hi retired13, I appreciate your post. I’m going to work out the problem by hand and will share with you. Thanks for your help

Yesss! I got it. Thank you so much :)

JAE Are you able to help me find Sy or are you also unable to do your workflow/job?

Thanks JAE. I will look for posts I can contribute to :)

Hi, sorry to bother you. Could you just tell me how you got Sy?

Hi there, yes the thickness of the plate is 0.375"! Thank you very much for the thorough response.

Hi This post is very helpful. Yet, I understand the concept of section modulus in general and was able to get the same answer as risa for section modulus which is (0.375^12^2)/4 = 13.5. However, I'm having trouble when it comes to the net section modulus

Hi, Would anyone be able to help me determine the formula for the net section plastic section modulus (Znet) of a plate with holes in it as in the attached. I understand the section modulus is simply (tp* dp^2 )/4 and thought I could simply use the same formula and sub in the hole diameter...

Hi there, would you be able to help me calculate the plastic section modulus of the net plate as well? For the section modulus of the plate I simply used: tp*plate_depth^2/4. I'm thinking I would do the same thing for the net section but subtract out the area of the holes. Risa is getting 9.56...

wow! You are a life saver! I couldn't figure this out and you have been so helpful. Really appreciate it!

Hi, I'm learning simple shear connection design and I'm having trouble finding the plate vertical eccentricity. I'm following a lesson from Risa where they calculate the distance ey as 0.51. I'm not sure where this comes from and wanted to see if someone could help me find the plate vertical...

Thanks all for the very helpful responses!

Our firm provided structural engineering services for a new two story steel framed building supported on ordinary conventional reinforced concrete spread footings and strip footings. At the first floor, the owner chose not to pour the concrete slab on grade as it's going to be retail and they...