Re: [i3detroit-public] Digest for i3detroit-public@googlegroups.com - 6 updates in 2 topics

[Jake Gedrimas]

Office Admin job if anyone has some time to fill.

https://www.linkedin.com/jobs/view/3105731560/?refId=qiJ9PZQf82n5s%2BT0DPYNBw%3D%3D

On Wed, Jun 1, 2022 at 3:07 AM <i3detroi...@googlegroups.com> wrote:

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• Access as a guest - 1 Update
• Metal post project - 5 Updates

Access as a guest

Roger S <surfer...@gmail.com>: May 31 10:30PM -0400 Hi Freddy. Your post was in my spam folder and I don't see replies from anyone else. I will be in either tomorrow evening or Thursday morning if either of those times work for you.   Roger S   On Sat, May 28, 2022 at 2:01 PM Freddy Neumann <neumann...@gmail.com> wrote:

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Metal post project

REA Real Estate <home...@gmail.com>: May 31 09:00AM -0400 Thank You Jody   I’m really want it to be safe and cost is secondary. I wish I had the specifics so I could start.   Everyone’s input has been helpful in clarifying my task and I am still listening.     On Mon, May 30, 2022 at 7:10 AM Raiford, Jody <jody.r...@i3detroit.org> wrote:

REA Real Estate <home...@gmail.com>: May 31 09:01AM -0400 Thanks   On Mon, May 30, 2022 at 9:36 AM 'Con Vuong' via i3 Detroit Public <

REA Real Estate <home...@gmail.com>: May 31 09:03AM -0400 Hi Dennis   I really want metal. What materials are you thinking of?

Dennis <dbp...@pageradio.com>: May 31 10:41AM -0400 Robelle,I am thinking you want metal.  I provided the photo as an illustration of the relative strength of materials required for a cantilevered swing support.  Those wooden beams are quite thick and strong."A" frame swing sets can get by with relatively weak supports because the majority of forces are in compression, in the direction materials are stronger.Your design requires metal supports that can withstand lateral forces, in the direction materials are weaker.The horizontal overhead support arm acts as a torque amplifier on the vertical support structure and its foundation for the twisting, turning and lateral forces from the swing.A person weighing 250 pounds statically can exert 750 pounds dynamically at the swing attachment points.  A 4 foot overhead support arm multiplies the forces where it attaches to the vertical support. The structure may "see" torque as much as 3,000 foot pounds in the directions that the vertical and overhead horizontal supports are weakest.The fulcurm is at ground level.  The part of the foundation that is, say 4 feet, below ground must withstand twice that force for an 8 foot high vertical support, or 2.5 that force for a 10 foot high vertical support.  All forces must be doubled for an industry standard 2 times safety margin.Going through this "back of the envelop" analysis makes me realize some reasons I haven't seen this design in use.  It takes experience, a good understanding of physics and material strengths.  Some say the strength of materials classes are the most difficult in mechanical engineering curriculums.It's an aesthetically beautiful design.  It takes very strong materials, but it is not impossible to do.Dennis -------- Original message --------From: REA Real Estate <home...@gmail.com> Date: 5/31/22 9:04 AM (GMT-05:00) To: i3detroi...@googlegroups.com Subject: Re: [i3detroit-public] Metal post project Hi Dennis I really want metal. What materials are you thinking of?On Sat, May 28, 2022 at 7:04 PM Dennis <dbp...@pageradio.com> wrote:Robelle,It's feasible but may not be affordable. Materials will be expensive.This two-sided wooden model gives you an idea of material strength required:https://i.pinimg.com/originals/17/8b/b9/178bb98bbce64ae44aae60d17635a778.jpgDennis313-720-5884-------- Original message --------From: REA Real Estate <home...@gmail.com> Date: 5/28/22 6:46 PM (GMT-05:00) To: i3detroi...@googlegroups.com Subject: Re: [i3detroit-public] Metal post project Thank You for the information. I want to understand, are you saying this is Not a feasible project technically?On Sat, May 28, 2022 at 12:12 PM Dennis <dbp...@pageradio.com> wrote:Dear Robelle In Michigan the minimum depth is 4 feet below grade to reach below the frost line.This design must accommodate turning moments as well as tilt moments of 3 times gravity, 6 times for 2x safety margin.Backyard swing sets are designed with triangles that translate to mostly compression forces on the supports and will not withstand the forces of this design.  Some public playgrounds built with two vertical supports withstand mainly tilt forces and are built with substantially heavier tubing.I haven't seen any materials at Home Depot, Lowes and Ace Hardware that will be strong enough.Some basketball hoop supports may be of sufficient strength.  The cantilevered hoop has to withstand similar forces.Dennis-------- Original message --------From: REA Real Estate <home...@gmail.com> Date: 5/28/22 11:44 AM (GMT-05:00) To: i3detroi...@googlegroups.com Subject: [i3detroit-public] Metal post project Hello Maker Family I am seeking assistance and direction with a pipe/post project. I have attached a picture, but I want to make it taller than the picture.  Questions How much deeper do I need to make it go into the ground for every foot taller and foot horizontal I make it?What is the standard pipe thickness and diameter in commercial swing frames?Thank you Robelle        -- You received this message because you are subscribed to the Google Groups "i3 Detroit Public" group. 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To view this discussion on the web visit https://groups.google.com/d/msgid/i3detroit-public/CAEnNRVJ%3D-exT_dcNm_Xw5Aw3KpisS502-28E4j9D%3Dfsmge3FEg%40mail.gmail.com.         -- You received this message because you are subscribed to the Google Groups "i3 Detroit Public" group. To unsubscribe from this group and stop receiving emails from it, send an email to i3detroit-publ...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/i3detroit-public/6292aa64.1c69fb81.bf3f7.2bdfSMTPIN_ADDED_MISSING%40gmr-mx.google.com.         -- You received this message because you are subscribed to the Google Groups "i3 Detroit Public" group. To unsubscribe from this group and stop receiving emails from it, send an email to i3detroit-publ...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/i3detroit-public/CAEnNRVLjmBYxLAmUaRqJMviZdP91_YWw%3DSZ%3DSSp7y6LE0r_RMA%40mail.gmail.com.

Roger S <surfer...@gmail.com>: May 31 04:58PM -0400 Cantilever beams have both tension (top face) and compression (bottom face). 1@

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