6 votes

Why would a column expand before accepting load through a narrow thunk?

The column top holds some narrow thunk and that thunk holds the driveway floor. I think we have some nomenclature that needs to be cleared up here. What I believe you're calling a "thunk" is ...
grfrazee's user avatar
  • 3,587
2 votes
Accepted

For a column, what does "rotation fixed and translation fixed" mean

So there's a permutation of rotation and translation each being either fixed or free for a column. What do each mean? To say that a specific degree of freedom of a support is "fixed" is to say that ...
William S. Godfrey- S.E.'s user avatar
2 votes

Why would a column expand before accepting load through a narrow thunk?

I find such a column hard to justify. As mentioned by @grfrazee and @ChrisJohns, what you are calling a "thunk" is usually called a bearing plate, and these are responsible for transmitting the force ...
Wasabi's user avatar
  • 13.1k
1 vote

Why would a column expand before accepting load through a narrow thunk?

Columns like this are often connected to the horizontal elements of the structure they support by bearings which are designed to support the vertical load from the weight of the structure but not ...
Chris Johns's user avatar
  • 15.2k
1 vote

Reinforced Concrete Columns - Interaction Diagram Question

To start off, I thought I'd just throw up a conceptual sketch of an interaction diagram as a point of reference. Re: Question #1 --- My best guess is that you're referring to a location in the ...
CableStay's user avatar
  • 2,760
1 vote

Would a PE-pipe filled with concrete make a good pillar?

This approach has been used in many, many scientific studies, and is an active area of research in the materials engineering community, but with a different material. FRP (Fiber Reinforced Plastic) ...
Mark's user avatar
  • 5,343
1 vote

Is it valid to solve for the young's modulus required for a given critical load with Euler Columns?

Yes you can use the formula to solve for an acceptable modulus of elasticity (E) that prevents buckling. Like any mathematical formula that relates 4 variables, you can calculate any variable based on ...
JohnHoltz's user avatar
  • 526
1 vote
Accepted

Clarification on Aluminum Design Manual

You should use $ K=2 $ and the allowable stress $$\sigma_{allowable}= \frac{\pi^2*E}{n_u(\frac{kl}{r}^2)} \quad (Eq. 3.4.7-3) $$ $n_u= buildings safety factor =1.9 $ $r= radius of \ gyration=\sqrt {...
kamran's user avatar
  • 22.4k
1 vote

How to construct rcc column footing on rock?

You should remove the rocks by explosion or rolling them away from the foundation. A site with large boulders is usually a young geology. deferential settlement and high underground water table are ...
kamran's user avatar
  • 22.4k
1 vote

Simple steel column buckling calc - where am I going wrong? (Eurocode)

You've calculated the Euler buckling force, not the compressive strength. The part of the code you want is EN 1993-1-1 section 6.3.1, which specifies how to account for imperfections and safety factor ...
ingenørd's user avatar
  • 1,288
1 vote
Accepted

How do i find the effective length factor (k) for a column from this chart?

You should take $\psi=0$, typically for fixed braced concrete column, design aids set the bottom as zero flexibility. Common sense then tells us that if we have a column with top and bottom fixed; it ...
kamran's user avatar
  • 22.4k
1 vote
Accepted

RHS column profile able to replace 3m UC 152x23 column?

The root problem of your question is that you're asking us to make some engineering judgement calls and calculations for a building where we don't know all the relevant details. You could however ...
ShadowMan's user avatar
  • 480
1 vote

Can the two columns and little triangle thing be removed?

That triangle marquee is called a gable. And the house is built in Colonial style. And of course it can be removed, provided you get the required permit. One alternative that may be less costly and ...
kamran's user avatar
  • 22.4k
1 vote

Support columns inside metal tubing

No, you make the tubular strong enough to take the loads.
blacksmith37's user avatar
  • 6,144
1 vote
Accepted

Support columns inside metal tubing

Structural metal tubing is normally used to take bending, axial and shear loads, i.e. to globally transfer load from one place to another. It also has to resist local loads, i.e. if there is a ...
AndyT's user avatar
  • 3,153
1 vote
Accepted

How to find tributary area for a column when I have a transfer slab?

As I understand your question, you are asking how to determine how the loads from the upper floors are divided between the lower columns. For instance, column C14 is going to transmit its loads to C12,...
Wasabi's user avatar
  • 13.1k
1 vote

Can the thickness of a guard post be derived purely from energy principles?

Using a purely energy-based approach, while theoretically possible, is not recommended. Not because it wouldn't work, but simply because most codes don't use such methods. The reason is that railings,...
Wasabi's user avatar
  • 13.1k

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