All Questions
Tagged with structural-engineering beam
131
questions
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2
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42
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Steel beam splice design
What is a good source of design recomendations for beam splices? I'm designing a structure and I need some help with getting proper splice strength for certain beam size. To make it simpler, I need ...
- 35
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4
answers
66
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Static Equilibrium of Rigid Bodies
When we talk about the idea of static equilibrium in engineering mechanics we consider the idealized case of a body which is a rigid body, meaning it cannot deform. Then we solve for the 3 equilibrium ...
- 1
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21
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Mass Brick Settling Causing Excess Load On Center Beam
I live in a 115+ YO building and recently had my kitchen remodelled. During this the subfloor was replaced (old 1x6s in bad shape). I noticed a significant bow in the joists with the central steel ...
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1
answer
73
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Need to find beam deflection of a steel tube
So I have a square tube of 40mm, 3mm wall thickness with a length of 1 meter. Both ends are fixed 25mm inwards. Load is 3kg centerpoint. Steel is SJ235.
I need to know the deflection of this beam.
...
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80
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Setting direction vectors for Lines in ANSYS APDL
I am using beam elements to mesh lines with "pre-meshed" shell areas. Problem is that the ANSYS sets Line Direction vectors on its own.
This results in Cross sections assignment flipped from ...
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2
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256
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Shear Force in Inclined Beam
Suppose I have an inclined beam with a UDL applied vertically downwards, will the shear force act normal to the beam, or vertically?
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1
answer
39
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Rigid frame deflection and material selection
I'm building a frame that will receive a point load mid span (likely it won't be but want to design for worse case).
The frame is 1.5 x 0.095 square tubing, and it will be skinned with 14ga on one ...
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21
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Ratio of length to baseplate bolt pattern to assume that a joint is pinned
I have a truss tower that is attached to a hoist arm by a baseplate. The truss tower is 80ft long and the bolt pattern of the baseplate is a 1ftx1ft square. Is it valid to assume that the joint ...
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42
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Load distribution for a load centered over the length of the middle joist in a 3-joist system
I'm not an engineer, but I'm trying to understand the correct analysis for what seems like a pretty simple case.
I'd like to know what the effective load on the middle joist is.
...
- 1
0
votes
1
answer
46
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Predicting breaking force of beam per length based on one testing
I've made a plywood carbon sheet and tested its breaking force, for a 200mm long, 50mm wide, 16mm thick it was 100kg +-
I was wondering if it's enough to help me predict what will be the breaking ...
- 115
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votes
1
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351
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What is the equivalent rotational/angular stiffness of a beam
I'm trying to model a larger system and working through a conceptual issue. I'm familiar with the concept of expressing the stiffness of a beam as an equivalent spring stiffness like in the image ...
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2
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81
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Post and steel rope framework for grape vine
I am planning to build a framework to support a grape vine above a patio. Ideally I would like to use steel rope to provide this framework, rather than a full timber frame.
Diagram attached.
There is ...
1
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2
answers
1k
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Is the maximum bending moment of a fixed end beam always at end?
Mathematically, we can see that with downward loads only (only upward loads at the ends), the maximum bending moment for a fixed end beam of span $L$ either occurs at $x=0$, $x=L$, or where the shear ...
- 111
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votes
1
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173
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Compound angle for support tri-beam / double knee brace
I'm trying to determine the most structurally sound way to construct a support beam for a serious treehouse. There are four options I've mocked up below - the first two are individual knee brace ...
- 113
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2
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210
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Maximum Deflection for simply supported beam under arbitrary triangular loading
I am trying to get the:
maximum deflection
location of maximum deflection
deflection at any point
For a beam under an arbitrary triangular load (i.e. a, b, c, and w can vary). I tried to solve this ...
