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Thank you all. So, what this detail shows is a transfer beam carrying a partial height wall above. The beam also supports some roof joists that bear on an exterior wall. So, my intent is to drag the lateral load from this beam (DL x CS) into an adjacent shear wall. @Aesur: Yes, drawing is to...

Hi everyone, I have a low beam/HDR that supports a partial height wall above, and I want to detail the transfer of lateral load from this beam into an adjacent shear wall. Please see the attached detail. Wall top plates are continuous, bottom plates discontinuous. So I need to transfer shear...

Celt83 thank you so much !

Hi folks, Page 69/133 of the NCEES PE SE Handbook is a deign aid table to the flexural design of concrete beams. How do you read this table? What is the top row? Side row? For example if: Mu/(phi * b*d^2*fc) = 0.195, how do you use the table to obtain w? I can calculate it using the equations...

Thank you very much, I found what I was looking for.

Section 7.4.1.3.1 asks you to calculate the seismic base shear using factors C1C2. C1C2 can be found in table 7-3, but this table requires the value of m_max. M_max by definition of the code is the largest m-factor for all primary elements of the building in the direction under consideration...

Hey Everyone, I've been modeling slabs in SAFE, and each time I am getting area load loss errors. Some times the value of the loss is positive or negative. I've made sure that I am not placing load over openings by investigating the shells causing the loss. I haven't found any explanation on...

Kootk, thank you very much. I will study this paper and report back.

Hi everyone, I am having a hard time understanding when to specify "development" or "splice length" in reinforced concrete design. I understand that: Development lengths are specified to prevent slippage failure, and transfer stress from reinforcement into concrete. Splice lengths are...

Hi Everyone, I am four years into my career as a structural engineer, and to be frank I am un happy with my salary. I currently make $70 000 CAD working for one of the "big" consulting companies. I am an EIT, and expect my P.Eng by the end of summer. My peers working in the public sector easily...

Something has been bothering me about principles of steel structure analysis and design... In the design of beams for example, if I am intending to use a section's plastic capacity (Mrp), can I compare that to the Mfy obtained from elastic analysis? Or do I need to perform plastic analysis of...

I'm just getting started with seismic design. Are you aware of any books with reference to Canadian code? I guess it wouldn't matter too much, as the ideas for design and analysis carry over from the US to Canada?

@dold, do you recommend the text book you referenced? Does it include chapters on the design of braces or other elements ?

Thank you for the references Dold and Jarrod, that's exactly what I was looking for ! I agree Dik, I will be using the above formulas to determine member stiffness and go from there

Ok, I see. So technically, I need to determine the axial elongation of the strut, in addition to the lateral deflection of the column, which gives the lateral displacement and therefore relative rigidity of the brace

Hi everyone, To calculate a floor's center of rigidity, and distribute shear forces in a building's lateral system with a rigid diaphragm, you need to determine the relative lateral stiffness of your lateral force resisting elements. For concrete shear walls, the relative rigidity is: 1 / [...

The load is into the page, being transferred from the concrete to the wall below. So, the load is in-out of the page with respect to the beam, then transferred east-west to the wall below. I want to make a clarification based on the replies (maybe I have a fundamental misunderstanding): How...

Suppose that a ribbed slab runs over a wall (the rib is perpendicular to the wall), and you want to transfer shear force from the web of the slab to the wall below. One way to do that is to connect the rib to the wall using a steel angle, bolted to the concrete web on one angle flange, and then...

Amazing references! To be honest, I changed the design to use equal leg angles as it made for an easier calculation. I will have to find time and go through the calculations in the references shown! Much appreciated :)

Hi Everyone, I am trying to evaluate the bending capacity of an unequal length angle (L 127x89x9.5. The CSA design equation requires you to calculate the symmetry parameter of the section and that involves the evaluation of an area integral. Please see the attached screenshot. Does anyone know...