Hello,
I have to design a connection of steel beam (wide flange) to a existing RCC column, refer attached photo to get the idea of what I am trying to do. For the design of end plate, I am thinking of designing it like a simple base plate of a column subjected to moment and horizontal force. Is...
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...
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...
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
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...
Please have a look at the attached sketch.
I want this type of foundation (as shown by "1" in the sketch) to be constructed, but want to get some answers first.
As shown in "2", some extra space (around 2 to 3 feet) would be needed to be excavated for the contractor to work. When the foundation...
Pease refer to the attached sketch.
I have retaining walls at different levels as shown in option "1" in the attachment. I don't want to transfer the pressure of the upper wall to the lower wall and keeping in view the constructability constraints, I can't go for option 1. In option 2 the bulky...
Please have have a look at the attached retaining wall sketch.
My question is, our usual practice is to provide 6" thick blinding/lean concrete under every type of foundation. But when it comes to retaining walls, we need sliding resistance specially when there is no passive resistance available...
I am a little confused about overlapping hoops, which we call double/triple rings in my area. I am in an argument with another engineer about detailing of overlapping hoops. The other engineer's practice is to place 2 regular hoops immediately next to each other to make it a overlapped hoop...
According to ACI/UBC/IBC, what load combinations should be used to check foundation soil pressure against bearing capacity for the following cases:
1. Considering only gravity loads
2. Considering both earth quake and gravity loads
In my area engineers use D+L for the first case and D+L+0.714EQ...
I have heard that minimum #4 bar size must be used for water retaining structures. I searched in ACI 350 but didn't find any such clause. Can somebody please provide reference to any such clause if exists in ACI 350 or any other ACI code. For a small water tank retaining wall I am designing, #3...
I have a test result of sulfate and chloride content present in sand to be used for concrete. Which standard covers their permissible limits? I have looked up in ASTM c-33 but there are no such limits provided there. Please direct me to the correct document/standard for this subject. Thanks
I am not from geotechnical background so I would like to understand the following questions (I posted this question in geotech forum but got no response, I would be glad if somebody here could help):
1) What are the limits/values (from geotechnical test) to determine if soil is expansive or...
