BAretried - Much appreciated.
My ideas are always way outside the box haha I'm used to it.
Good news the client today actually doesn't need the offset arm or the fixed arm extension off the post either.
Were going with a 6" Diameter x 1/4 wall round post with two smaller jib style arms that...
3d Dave , much appreciated.
Ya I mean 99% of my current knowledge is from someone else's trials , engineering analysis etc, me just being an employee at the time lol
I've designed and fabricated everything from 60 ton lowbed trailers to tiny architectural brackets, railings, floating stairs...
Much appreciated, I did see that one before, it was definitely a good option.
Swinging that big jib around all day takes too much energy, if that dude had my design he'd have an easier time and could access more area without even moving the crane at all. The tracks would be parallel overhead...
Theres a link at the bottom of my first post you click on , prompts a download.
I'm no engineer, I've designed alot so I have a small understanding, with feedback I can improve the design.
I thought engineers reply to these ??
My apologies if I'm in the wrong place.
They have a unique need to have the track overhead and be able to get it out of the way.
I figured this design was ok , the only thing I found online was a small jib crane type thing that's way over rated for this.
I'm not reinventing the wheel just re configuring for their unique needs...
Which steel square tube would perform better in this case?
3x3x1/4 wall or
4x4x1/8 wall
Is a larger thinner perimeter stronger than a smaller heavier one ? Or same ?
I'm thinking the 1/4 wall because really I need more material in my tension flanges of the tubing, I could maybe weld a flat...
Hi,
I'm still in design stage, have yet to submit to my engineer.
I made a mock up in my shop to see where it deflects and how much. Bit of tension/compression in the arm tube 12" off the post vertically and it does experience torsion when the tracks are rotated perpendicular.
The original...
Hi Everyone,
I'm designing and making this post and arm for a manufacturing client.
They need the track overhead to hang the air tools from balancers, but they also need to rotate the arm to gain clearance to drop over the cover of the unit for shipping then rotate the arm back inline and...
I'm in Vancouver b.c. Canada . Here the home inspection must be accompanied by a schedule CB by the engineer. So when he reviews and stamps the schedule I give the copy to the builder which he submits to the home inspector for final.
The builder needs the final to invoice the client. So it's...
I think the engineer just maybe isn't sure , or just personally doesn't like it, I'm having him back end of week I'll adding a few things , it should pass.
Not a great pic , it's all I have for now until I return.
https://files.engineering.com/getfile.aspx?folder=ee7e0112-c367-4925-892a-cde1f8091c52&file=IMG_20230606_143405.jpg
I've heard the average step frequency can vary from 2-5 Hz depending on weight, going down or up.
I read that the natural frequency of the stair can't be the same range of Hz.
Too bad I couldn't wire a speaker under each tread hooked. To a device like noise cancelling heads phones lol...
The clients are happy with it, builders are too. Eng won't sign off.
No there is no glass or railing on the open end. Cable wall completely separate from the stairs, client wants a true open cantilever.
I'm on my own, but I have good experience with structure, just these eccentric loads/...
You guys , it's at a raw stage in the build , of course it looks dangerous and doesn't have a handrail yet lol they haven't even put drywall up, haven't you ever been to site (little inch guy)
It's being wrapped in some Dupont polymer sort of product for a modern look. Walls being furred out...
Hi, I recently installed these , design was submitted to my engineer. We are fighting small vibrations on the treads.
I'm wondering if I can use a vibration app on my phone to see if it's unacceptable.
I realized that I need more posts to weld my stringer to in order to stop vibrations, issue...
