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Hello Dear Engineers, Looking for your valuable response. This is important for me to determine the Gamma factor as shown below. Thanks.

Hello Dear Engineers, Would you check the mat punching shear and one way shear (if governs) at the locations where thickness becomes the minimum? Pls see the attached figure for understanding my question. The figure is taken from previous projects. Thanks a lot.

Hello dear Engineers, It would be great to know your understanding on how much thickness makes a "thick member" in punching shear resistance to drop to 2sqrt(f'c)b.d? Also what is meant by low reinforcement ratios? Is it flexural reinf. ratio? The following snippet is taken from Seismic Design...

Dear Engineers, As metioned by Taranath in his book, outriggers can be of shallower depth (rather than one or two storied deep) when used in each floor. That's how we did in a project. The building is 25 storied. Outriggers usually engage the perimeter frames in bending with core walls. Now, I...

Hello Dear Engineers, I have attached some figures below. Would you pls think and say what framing system is it from ASCE Seismic Lateral Framing Systems? FYI, my understanding is RCC portion is Special Moment Frame, and Steel is not a particular framing system because it is just a roof and...

Hello, I have a practical question. The following is the scenario. I have attached two figures below, one is beam layout, the other is the construction photo. I would like to know whether the beam connected 6" or so apart from the face of the column would provide bracing effect to the column so...

Dear Engineers, I have attached a figure herewith which will be beneficial in understanding my query. As you can see, the steel building is three-storied, and some knee braces were added previously to avoid retrofitting of some main steel beams (girders). The purpose was to reduce the length...

Hello, Often my seniors seem to say don't use a 20-inch diameter pile for a length higher than 100 feet or so. I couldn't get the proper reasoning behind it. If a 20-inch or 18-inch pile needs to be laid at a 120 feet depth to reach the hard layer and if the concerned pile has the structural...

This is a document prepared for a local compliance authority of Bangladesh. I would like to know your thoughts and suggestions on it. DISCUSSION AND SUGGESTIONS FOR CLASSIFYING SITE CLASS Abbreviations: BNBC: Bangladesh National Building Code-2020 ASCE: American Society of Civil Engineers...

Hello. Normally we have been using 35% stiffness modifier for checking slab vertical deflection for Service load combination (DEAD+LIVE). Would you use the creep coefficient along with reduced stiffness of slab and beam etc.? My creep coefficient is about 1.7. Please share your approach...

Hello, The query is based on the minimum live load table of ASCE or IBC. I have a confusion regarding the One and Two-family houses Versus Multifamily houses' minimum live loading in a multistory building. In the case of a 5 storied building containing two units of single families in each floor...

Hello all, Slab requires reinforcement as it supports the loads above it. If I provide reinforcement for slab 10mm@8" at the top to meet the requirement, can I take the full advantage of this slab reinforcement in calculating the T-beam rebar adequacy of an existing RC beam? I feel like I...

Dear Engineers, Please help answering the following. Assume that, I must design the structure considering an IMRF or higher.

Please see the following figure. What is meant by "the maximum moment that can be developed by the system"? What I understood first is, it means the max moment which can be obtained using the code suggested load combinations. But instantly the second thought which comes in mind is "how can the...

Dear Engineers, Is cap plate moment connection allowed in Intermediate or Special SLRS? The codes only discuss Moment End Plate connection when talking about beam to column connection. Figure is taken from the internet.

Dear Engineers, In most of the cases when designing these UGWT, I found that, soil tension occurs in the following two cases: 1. Buoyancy load combination. 2. If the tank bottom slab is actually a mat, and the walls support two or three storied structure. In this case, the vertical load coming...

Dear Engineers, In the case of designing an anchor connection between the steel column and RC pedestal, can we assume that the shear forces coming from the steel column will be borne axially by the grade beams along that direction (or grade slab)? Or do we have to size the pedestal considering...

Dear Engineers, I hope you all are fine. Please refer to the following figure. I have read the following and compiled some texts from the books of Taranath. Again elsewhere I found this, where it says "or" (either of them, i understood) What ticks in my mind is, both the projections need...

Hello Dear Engineers, ETABS' Steel Frame Design Manual says, Again, What I understand is ETABS produces auto-generated load combinations based on the user-defined load patterns and load cases depending on specific user-chosen design code and seismic preferences. I believe ETABS can work on...

Hello Dear Engineers, Are the steel roof bracings part of OCBF or other braced frame systems? Do we need to make them seismically compact following AISC Seismic 8.2, Table I-8-1 of AISC 341? I was thinking that, they are just part of the roof diaphragm and not part of seismic braced frame, and...