Recent content by hetgen

Collapse likely from a weak-story mechanism (slender roof columns) and stiffness discontinuity, causing progressive failure. Watching the video from The Guardian, it seems the roof was not a factor in the collapse. The collapse definitely began at a lower level. Heartfelt condolences to the...

Hi everyone, I’m searching for a language model specifically trained on structural design codes like ACI, AISC, Eurocode, and other engineering standards. Does anyone know of such a tool or have experience with one? Also, I’m curious about how these models handle copyright issues when using...

Yes, extend the full development length beyond the point where it is no longer necessary, and consider the additional tensile reinforcement required for shear. Rebar curtailment does not need to be an exact procedure; it is advisable to add more anchorage length to offset the approximations...

That is a typical surface bed (slab-on-ground) with top shrinkage rebar.

You got all appropriate responses here, but check this thread for additional responses: https://www.eng-tips.com/viewthread.cfm?qid=497580

I don't believe that is a correct statement. The moment induced at the joint, arising from the eccentricity of the columns and the unbalanced loading on the slab panel, should be distributed between the columns and the slab strip based on their relative stiffness. The unbalanced moment resisted...

Verify the bearing stress, as mentioned by @rapt. Additionally, assess the punching shear of the slab, considering the heightened shear stress resulting from eccentricity. The moment induced by the eccentricity will be distributed between the columns and the effective width of the slab. To...

Would you mind sharing a typical example?

You could detail it as an approach slab if it is an elevated slab.

That is true if the purlin has sufficient stiffness and acceptable vertical deflection spanning between points A & B. If the purlin doesn't have sufficient stiffness spanning between pint A and B then the truss bottom chord should not be considered as laterally braced on point Z. The...

I don't think you can have it both ways. Either the truss has sufficient lateral torsional rigidity to provide support to the purlin in bending or the purlin has sufficient flexural stiffness to support the truss for LTB. The fly brace is just an axial link. You can't have your cake and eat it!

See the code's commentary below. But ACI- 318-02 is old and long superseded, you should use the latest code.

I was tasked to review an interesting roof design a while back, the building owner was angry and the designer thought I'm crazy when I labeled the building " NOT CODE COMPLIANT " The problem was that there are 100's similar structures built for the same client and are performing well. Check...

What do you mean by 'slab edge release'? Do you mean ignoring the torsional rigidity of the perimeter beams? Where in the slab do you require 8Y14 per meter top steel? Prokon used a very rough method per ACI to calculate flat slab long-term deflection, so the result will not be the same as...

I'm I missing something? the answer should be as simple as 9 x 300lb devided by the length of the stringer.