I don't know of any code which defines this, but a one meter "working perimeter" around the footing is probably more than enough. Regarding the slope of the excavation walls, that's trickier to ...

This is the sort of thing that is best defined by each country's structural codes. I'm from Brazil, so I'm going to use the NBR 6118, our concrete code. That being said, the general gist behind all of ...

As mentioned in the comments to the question, since you are using a 3D analysis tool, you need to fix rotations around the X and Y axes. If you had been using a 2D analysis tool, simple pinned and ...

It seems like what you're really after is the force, not the mass. Now, if you're assuming that the plate will shear off, then the easiest way of calculating the force isn't through Newton's laws, but ...

@hazzey has answered your main question quite effectively, so I'll just add two comments. While I agree that partially filling rows is perfectly fine, I would just like to add that it may be better ...

In a continuous structure such as a beam or a column (under the expected loads for such elements), the structure is effectively indistinguishable from a truly monolithic one. This has to do with how ...

I think there is no such limit. The only possible factor which comes to mind is the stress at the foot of the torus. If you momentarily consider the structure to be infinitely rigid, then the region ...

@grfrazee says it's a dead load, @NamSandStorm and @hazzey say it's a live load, and now I'm going to stop half way between them. It depends on what your tank is doing: Is it a frequently flushed ...

The exact deflection result is a function of the shelving's structural system. In the OP comments you mention that the two options would be either a wooden skin with metal edging or a wooden lattice ...

I have no resources to point to in regards to this, but I'm fairly certain your gut-feeling is correct. In fact, end diaphragms exist in bridges primarily to hold the soil on the approach. They can ...

Since you want to know what happens with a load applied to the corner of the desk, I'm going to simplify this question into two dimensions, assuming that the leg on that corner resists the load alone. ...

It depends on the loading conditions. It's important to note that the stress concentrations can be intuitively understood as created by the load's need to deviate from the hole. The larger the width ...

What's an equation? In life there are two types of equations: theoretical equations are obtained from first principles: make some assumptions and then play around with variables until you get a ...

I think your big misunderstanding is in this paragraph: [...] if I were to scan, starting from the leftmost side towards the right. I would initially see a compressive force onto the beam from R, ...

It's a truss bridge. A quick Google Image search will make the difference between the bridge types clear. This is a plate girder bridge: And this is a truss bridge: Basically, a girder bridge uses a ...

To understand the hyperstatic moment, we need to first remember that prestress is, by definition, the application of an internal stress state on the beam. Therefore, it cannot generate external loads ...

This is a case of a variable-cross-section beam. What you need to do in these cases is separate the cantilever into two parts: near the support it has one cross-section, near the free end, another. ...

Yes, but probably no If we're feeling a bit pedantic, the answer is obviously yes: a suburb of white roofs will have a higher albedo than one with black roofs. It'll therefore reflect more light ...

So, in such problems, the first thing to do is calculate the support reactions. Thankfully you've already done that correctly, so we can move on from there. Now, something to keep in mind when trying ...

If you think about it, a support is just an applied force or moment, right? If you have a simply supported beam with a force $F$ in the midspan, the supports will be two forces, each $F/2$ in the ...

That equation does not distinguish between large and small beams. It is as valid in this case as any other. But this will only be a problem if $h \gg 0$. Remember that $h$ isn't the height of the ...

Euler buckling is a perfectly elastic behavior: if a beam buckles, it takes a sinusoidal shape of arbitrary (possibly infinite) amplitude. If you then remove the applied force, the beam will return to ...

Depends on your definition of "better" and on the specific truss being analyzed. The displacement method is useful in that it is agnostic to such things, statically determinate and indeterminate ...

Since we're not having to deal with friction, conservation of energy is our best friend. There's no need to "convert rotational work into translational work", merely observe that they must be equal in ...

This is cheating a bit, but let's start backwards by looking at the correct diagrams you've already shown us and comparing them to your solution. This will hopefully let you notice something which ...

This problem can be simplified by observing the symmetry. This allows us to solve only one side, considering it as a beam of span $L$ which is fixed and pinned: Now, reactions are really just ...

If I understood your description correctly, the structure is something like this (ignore the dimensions and loads themselves, they're simply representative of the relative values. Also, I didn't apply ...

As @hazzey mentioned in a comment under the OP, if nothing is going to break, then the choice is mostly arbitrary. So I'm going to assume that things do break. A structural element can basically ...

EDIT: Looking back at this answer I realize that the entire method is flawed. The final answers for $M_B$ and $B_y$, however, are correct. However, I believe this cannot be proven without FEA software ...