Re: Felder-grade wooden joint
¿ªÔÆÌåÓýIs there a reason why you can¡¯t build in a compression arm ie a triangle? That should easily solve your problem. ?
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From: [email protected] <[email protected]> on behalf of Brian Greene <Brian@...>
Sent: Wednesday, May 20, 2020 9:35:23 PM To: [email protected] <[email protected]> Subject: Re: [FOG] Felder-grade wooden joint ?
Torsion box ¡°laying¡± on it.
Pic of cross section attached for context... it¡¯s a platform with a ¡°bolt¡± assembly that allows me to leave the platform ¡°locked¡± on the upper floor not suspended from the hoist.
The bolts actually articulate with a special ¡°key¡± lever inserted from the top of the platform - so to drop it you have to find the key to the control box for the hoist, hoist to release tension, and then use the keyed lever to retract the bolts.
Then you can lower the hoist to the ground.
The platform is... stout. ?I suspended it by the bolts and then jumped up and down in the middle... with just screws it held fine, then it got glued and screwed more.
So the load is... shear/angle? ?Mostly shear I¡¯d guess from the strength of the torsion box, but it¡¯s more ¡°long¡± strong than ¡°narrow¡± strong so I suspect more load in the middle of the arm.
I¡¯ve also considered weaving a cable ¡°through¡± the platform - I could start at 24¡± out and with a 7¡± rise - get a nice gusset with a hidden cable. ?But it means the lift arms are tied to the platform - less cool and harder to work on later.
The arms hang from the unistrut and there¡¯s a 1 ton lift above.
If I just need to spring for 80/20 or find a welder... I guess I will. ?But ships and huge stuff has been made of just wood - this doesn¡¯t seem too nuts.
I mean it¡¯s an elevator in my shop, it¡¯s a little nuts, but not like, excessive.
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On May 20, 2020, at 9:24 PM, Michael Tagge <mike.j.tagge@...> wrote:
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