# Questions tagged [structures]

Questions relating to or the engineering application of a device that must withstand a loading via deflection, stresses, resistance to buckling, or natural frequencies.

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37 views

### Check of a nominaly pinned steel joint

I am interested how to check a nominally pined joint. Especially how to check its rotational capacity and whether i can define it as nominally pinned in structural fem model. I understand that there ...
26 views

### How to calculate a global strain from a field disitribution

For an arbitrary articulated structure subject to non-affine (non homogeneous) deformations, the components of the strain tensor are defined locally. Is there a way to calculate a numerical strain ...
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160 views

### Base or foundation?

Please help, what is the correct term for: The bottom/foot part of building or structure which carries loads from the building/structure and transfers the loads to the soil/earth/ground beneath it? ...
8k views

### Steel Structure connection pin or fixed

For the connection above, I think that once the beam is loaded, their is no room for rotation of the beam. But as per British Standard this is a pinned connection. So I have been trying to determine ...
66 views

### How should I position two shelf supports for the minimum deflection? [duplicate]

The above is the shelf that I'm intending to put up. It will have two symmetrically placed supports. This is probably a simple question that really should be answered in all DIY shops but... ...
460 views

### Does the use of the catenary in an inverted weight model imply a more solid structure?

I am studying GaudĆ­ and how does he created some of his work. I found that he used inverted weight models (as the shown in the picture below) to recreate the catenary. In many articles it is pointed ...
6k views

### How much weight can this stand hold?

I got this stand from a friend of mine years ago. Its unbranded. I want to use it to hold a 55 gallon fish tank which can weigh about 456 pounds to 622.5 pounds. How can i calculate a estimate of how ...
224 views

### How do I build a miniature concrete house?

Our teacher gave us a project before Christmas break, it was to build a miniature house, she didn't state what specific materials should be used, so I built a cardboard house. She didn't accept it ...
918 views

### Critical Buckling Load for a Spring Supported Bar

The above is a past exam question from an introductory structural analysis course, one in which although we have studied the Euler buckling load equation, we have just been given parameters for the ...
4k views

### Rectangular hollow section vs square hollow section [closed]

Which is better to use in contructing ceiling frame? RHS or SHS? And why?
8k views

### How to calculate deflection of a simple beam with a load in the center?

Given this type of arrangement: - image by Hermanoere Where the beam is of rectangular cross-section. I am specifically thinking of a wooden beam where I can look up some material characteristics (...
4k views

### How to calculate effective section modulus of a slender section?

Hi how to calculate the effective section modulus of a class 4 section using Eurocode 1993? Can someone show me an example? I tried searching online but cannot find anything useful. My main problem is ...
1k views

### Given the tensile strength of a rod, how do you calculate the max weight that can be hung from it?

Given a 3.25" long, 0.125" diameter rubber rod with tensile strength 1200 psi supported on both ends, how much weight can you hung from the middle of it without breaking it? (This is not homework I am ...
52 views

### How are these components called? [closed]

I need to build a structure like the one in the picture below. Basically, it is a pendulum that holds a measurement hammer and lets it oscillate without friction. I don't know how to find the two ...
665 views

### Maximum deflection of a beam, fixed in one end and concetrated load at free end [closed]

A 2 m long beam fixed in one side with a 2000 kg concentrated load at free end. Profile of the beam is HEB100 material S235. I would like to know if the beam will break under this load. If ...
16k views

### What angle - for a strut - provides the greatest vertical strength/support for a cantilever?

I want to affix a cantilever to wall. I will support the other end of the cantilever with a strut made of wood, that attaches to some point on the wall below the cantilever, as shown in this sketch (...
81 views

### Positions of Max Load a human would exert on horizontal rods of such a system by positioning leverage & bodyweight?

My mechanical & civil engineering usage is gone as the last time I did that was in Freshman year & my major went in another direction, but I've tried to be as thorough as possible using a ...
528 views

### How do I fabricate a sphere? [closed]

I'm want to make a 2 meters wide sphere that should be circular enough as a giant hamster ball! I could make it of some sort of strong plastic or steel. It should have a hatch on top that can be ...
126 views

### Could this garage door's bowing be caused by someone falling into it? [closed]

The tension spring broke on our garage door causing it to fall. Afterward, the garage looked as it does in the pictures below. The most straightforward explanation to me is that the impact of the fall ...
357 views

### Calculate mobile base weight to support adjustable arm

I want to calculate how heavy a mobile hydraulic post table base must be to support an adjustable monitor arm and monitor. Monitor (iMac) Specs: Height: 20.3 inches (51.6 cm) Width: 25.6 inches (65....
361 views

### Hinge joint for flat panels that can also flex horizontally?

I have to design a science display board consisting of 20 panels 2m x 2m high and wide, which can fold up as a giant pamphlet. The difficulty is how to load and unload them from a lorry in less than ...
828 views

### How do the columns in the 'magic mountains' sculpture stay up?

I am reading this story on artist Ugo Rondinone's sculpture in the Nevada desert (Building an Artistās āMagic Mountainsā to Draw Visitors to the Desert) and simply wondering (as an artist myself): how ...
186 views

### Vertical wave action on bridge

Rio de Janeiro, Brazil is currently stunned by the fact that yesterday a span of a brand new (innaugurated in January) bicycle bridge along the coast collapsed when struck by a wave, killing some ...
536 views

### Suitable tube materials for making a light-weight, heavy-load bearing structure [closed]

I am looking to build a detachable hammock stand structure for camping. I was originally thinking about making one out of PVC but I am in the UK and it isnāt cost effective as it looks like it needs ...