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a basic force question
- Thread starter abrahamJP
- Start date
What would you say if I went on to the electrical engineers forum and said I was asked to design a circuit for a robot, and what gauge of wire should I use?
There are SO MANY different things to be taken into account here. Stick with electrical and let the structurals do their job, too.
There are SO MANY different things to be taken into account here. Stick with electrical and let the structurals do their job, too.
- Thread starter
- #3
yes, it "looks" a very simple question, but ...
you've drawn a "support" and two force components; and you seem to be asking what limits the "?" ...
like "sita" mentioned above ... a million things ...
what is the support made of ? (steel or silly-putty)
how is the support attached to the wall ? (1/2" bolts, or 1p nails)
how strong is the wall ?
the answer depends on what's going to fail this.
you've drawn a "support" and two force components; and you seem to be asking what limits the "?" ...
like "sita" mentioned above ... a million things ...
what is the support made of ? (steel or silly-putty)
how is the support attached to the wall ? (1/2" bolts, or 1p nails)
how strong is the wall ?
the answer depends on what's going to fail this.
ImminentCollapse
Structural
abrahamJP
I want to finish out the bonus room but the house wasn't wired for this and I'm out of breakers. How do I splice into the main feed so I can put in a few outlets? This will be my kids playroom.
Thanks,
IC
I want to finish out the bonus room but the house wasn't wired for this and I'm out of breakers. How do I splice into the main feed so I can put in a few outlets? This will be my kids playroom.
Thanks,
IC
- Thread starter
- #6
jdgengineer
Structural
I agree with the others this is a basic problem outside of your expertise, and you shouldn't be designing this. The question boils down to a basic statics problem.
Sum forces x, there is no x reaction. The only reason there would be a x directional force would be to resist the moment at the base of your cantilever. This force will depend on your tension-compression couple at the base, and depending on design of the fixed connection may not even occur. Additionally, fixed reactions with strut can be heard to develop - a knee brace would be more common.
Either way, if you need more help than this, it's outside of your area of expertise and you shouldn't be doing it.
Sum forces x, there is no x reaction. The only reason there would be a x directional force would be to resist the moment at the base of your cantilever. This force will depend on your tension-compression couple at the base, and depending on design of the fixed connection may not even occur. Additionally, fixed reactions with strut can be heard to develop - a knee brace would be more common.
Either way, if you need more help than this, it's outside of your area of expertise and you shouldn't be doing it.
woodman88
Structural
- Oct 23, 2009
- 1,020
Sum of moments see
Sum of forces see
and
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
Sum of forces see
and
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
msquared48
Structural
There are a lot of structural engineering textbooks, to include, but not limited to, AISC and AITC design manuals, that have all the applicable formulas for cantilevers.
You really need to seek the services of a structural though for Mr. Mastro's job here. Where is he now?
Mike McCann
MMC Engineering
You really need to seek the services of a structural though for Mr. Mastro's job here. Where is he now?
Mike McCann
MMC Engineering
get hold of a basic structural analysis text something like "strength of materials".
the analysis is describing a "cantilevered beam" (google that)
the reactions at the wall balance the beam in force (the beam has down forces acting on it, the wall provides an up reaction (to stop the beam from falling). the wall is also providing a moment reaction (to stop the beam from spinning 'round ... imagine what the beam would do if the wall mount was a single pin, that the beam could rotate about). follow the links above for "sum of forces" and sum of moments". google "static equilibrium"
google "beam bending analysis"
the analysis is describing a "cantilevered beam" (google that)
the reactions at the wall balance the beam in force (the beam has down forces acting on it, the wall provides an up reaction (to stop the beam from falling). the wall is also providing a moment reaction (to stop the beam from spinning 'round ... imagine what the beam would do if the wall mount was a single pin, that the beam could rotate about). follow the links above for "sum of forces" and sum of moments". google "static equilibrium"
google "beam bending analysis"
M = Pa + wL*L/2 is the Bending Moment at the support where P is the concentrated load, a is the distance of P from the support, w is the uniform load and L is the span of the cantilever.
If you are planning to weld the channel to an end plate, make sure you follow proper procedures to develop the light gauge channel section.
If the end plate is to be anchored to a stud wall, make sure that the connectors can resist the applied moment. Also, make sure that the thickness of the end plate is adequate to resist the moment from the connectors.
BA
If you are planning to weld the channel to an end plate, make sure you follow proper procedures to develop the light gauge channel section.
If the end plate is to be anchored to a stud wall, make sure that the connectors can resist the applied moment. Also, make sure that the thickness of the end plate is adequate to resist the moment from the connectors.
BA
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