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Thread: A church riser project

  1. #1
    Join Date
    Feb 2003
    Location
    McKean, PA
    Posts
    13,675

    A church riser project

    Our church has an elevated area behind the altar and pulpits that is used to display banners and seasonal displays. They had some risers they used for displaying a nativity set at Christmas time. The original risers were made out of 3/4" particle board and 2 X 4's and 2 x 6's. Some were six feet long. They were all very heavy and took up a lot of room for storage. They were also very difficult to lift up 8 feet to the raised area and some were broken. The asked me to design something that would take up less space, be strong enough to support the weight of the large figures and be easy to handle.

    At that time, I had been inspired by a torsion box design that Frank Pratt did. I put together a Sketchup drawing to show the committee what I was thinking of making for them. After a bit of back and for, I gave them an estimated cost for materials, which they approved. We finalized the design by settling on two foot and four foot lengths and how many of each.

    Here is the completed set of risers. The panels have a frame that is made of select 2 x 4's cut to 1 x 1-1/2 with lap joint corners. The skins are 5mm plywood from the big box store and the foam insert came from the same place. The skins are glued to the wood with wood glue and the foam is glued with polyurethane glue that was spread over the entire surface. I weight tested the first one by placing 35 pounds on the center of the 4 foot span. The dial indicator under it deflected less that 0.01 inches. There are 8", 12" and 16" legs, which are all interchageable. I coated all the surfaces with 2 coats of oil based polyurethane to give the plywood some protection. There is also a storage box for all the legs that is not shown. The legs in the photo appear to be crooked, because they are not screwed all the way in....
    IMG_4955.jpg

    The committee is very pleased with the end result. The true test will come in December when they go to use them.
    Last edited by Lee Schierer; 07-06-2021 at 8:23 PM.
    Lee Schierer
    Captain USNR(Ret)

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  2. #2
    Join Date
    Jan 2016
    Location
    Longmont, CO
    Posts
    738
    nice work. can you detail the let attachment? an insert with a threaded stud on the leg?

  3. #3
    Join Date
    Feb 2003
    Location
    McKean, PA
    Posts
    13,675
    Quote Originally Posted by Adam Herman View Post
    nice work. can you detail the let attachment? an insert with a threaded stud on the leg?
    In each corner there is a 1" thick block with a hole drilled through it. The block is glued in place. On one side of the block there is a 5/16 T-nut. On the legs there is a 3" hanger bolt sticking out 1.2 inches that screws into the t-nut through a hole on the bottom side of each panel that aligns with the hole in the block.
    Last edited by Lee Schierer; 07-07-2021 at 3:40 PM.
    Lee Schierer
    Captain USNR(Ret)

    My advice, comments and suggestions are free, but it costs money to run the site. If you found something of value here please give a little something back by becoming a contributor! Please Contribute

  4. #4
    Thatís quite a few tables. Real nice set!

  5. #5
    Join Date
    Mar 2003
    Location
    SE PA - Central Bucks County
    Posts
    57,898
    Looks strong and is a very versatile setup with the separate components to "build" what is needed seasonally. Nice work!
    --

    The most expensive tool is the one you buy "cheaply" and often...

  6. #6
    Join Date
    Mar 2005
    Location
    Cashiers NC
    Posts
    561
    It is great when one can practice bathe craft and fill I need. PTL!
    Charlie Jones

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