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I am so disappointed that how this issue is left unattended by ACI and other American codes (as I am only aware of them). @jjl317 and EngDM The designer (vendor) is using "Rawlplug" bolts so I tried their software but there is no block masonry option available there. They are only dealing with...

Hello, I have a task where I have to check a design of a steel signage structure to be mounted on a 6" thick block masonry wall. The anchor bolts are post installed expansion bolts. I am unable to find a specific code (ACI or any other respective USA code) on this matter. What I found is ACI 318...

HELLO, I am looking into this ground + 1 floor building's ETABS model. I want to ask your opinion on what should be the floor height considered here in ETABS? Please refer the following image What I am thinking is it should be 9'6" (5'6"+4') since it would be the design length of the column...

Hello, I have to provide a plain concrete mass to make a trench for cables. Length of this trench is 15'. Sectional dimensions can be seen below. What I am concerned about is whether there be enough shrinkage in this 15' long mass of concrete to develop cracks? How can I check it? What would...

I have 2 different soil investigation reports for the same site. One done 3 years ago and one recently. One of them provided gross allowable bearing capacity while other provided net allowable bearing capacity. The structure doesn't have any basement, just simple isolated foundation. If I use...

@DoubleStud In case of scenario "2", what is the approach behind putting the base slab directly on the existing soil instead of a competent strata deep down? Did you do any soil improvement? usually on internet I have seen base slab resting directly on natural ground level (with zero or minimal...

Hello, I have a question regarding box culvert. Please have a look at the attached image. I have to design a box culvert for the condition shown in "1". This is the natural ground condition (not excavated). Basically it is an existing path of water flow. The issue is where should I place my...

A propped cantilever element (fixed at one end and pinned at the other) loaded with triangular load should produce the bending diagram as following: Now I have an ETABS model of an underground septic tank. Since walls are connected to foundation at the bottom (fixed), with slab at the top...

@Celt83 9.7.5.1 , thanks this is what I was looking for. Thank you everyone for your responses. You all have been really helpful like always.

@JAE It looks logical but is there any reference for even distribution? And this even distribution includes sides of beam too?

ACI 318-19 CLAUSE 9.5.4.3 reads: Longitudinal and transverse reinforcement required for torsion shall be added to that required for the Vu, Mu, and Pu that act in combination with the torsion. Also in commentary it says to add longitudinal torsional reinforcement to longitudinal flexural...

Hello all, What does ACI say about placement of fresh concrete against hardened concrete? Is it necessary to apply a bonding agent or surface roughening is enough. Please provide any clause by ACI which talks about requirement of bonding agent. Thanks

@CarlosAguera I understood two of your points. 1. Compatibility of older versions with newer versions. I haven't tried it in Staad but in ETABS too you can easily open older version models in newer versions. 2. Compatibility with third party softwares. This feature is available in csi products...

@SethGuthrie Do you think creating a CAD file for the sake of making model then importing it to STAAD and then checking it if everything sits right is a smart and time saving process?

@SethGuthrie I am an ETABS user. This feature (to import from CAD files) has been there for a long time. It can be useful, but still it has it's limitation. We don't use it with even ETABS. Not having each floor plan and grid elevation views is a big turn down. It is not only about creating...

I would like to know how people model complex architectures in STAAD. Used it in university and it didn't attract me at all.

A structural consultant in my area uses CSI SAFE version 8 to design foundations. He has designed a lot of mid & low rise buildings for the last 40 years. I want to discuss a method he uses in SAFE. What he does is he draws 2 areas for foundation above each other with the lower one having a...

A structural consultant in my area uses CSI SAFE version 8 to design foundations. He has designed a lot of mid & low rise buildings for the last 40 years. I want to discuss a method he uses in SAFE. What he does is he draws 2 areas for foundation above each other with the lower one having a...

Thank you Hturkak, you have been very helpful.

Yes one of my concerns is differential settlement and upper foundation may act as suspended