Electronics > Projects, Designs, and Technical Stuff

Weight of Threaded Rod

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bostonman:

--- Quote ---I don't understand from your post if the thing is hanging or standing
--- End quote ---

The bookcase is hanging, the threaded rods go through the ceiling, and through a 4x4 laid across the attic joists with nuts (maybe I'll use coupling nuts to catch more threads).

You were implying I was suspending it to the A frame (or at least  I thought you were), so I was correcting you.

coppercone2:
I thought you were building a shelf hanging from the top of the attic in the attic

bostonman:
No.

The bookcase will be on the wall in the computer room suspended by the rods going through the ceiling and into the attic - this is a 3D image of what it will look like.


Mechatrommer:
i certainly wont make a bookshelf like that. its so non-portable and installation/removal is more difficult.. any decent house floor, concrete wall or studs can support 500lbs just fine. ymmv.

ebastler:

--- Quote from: bostonman on March 14, 2020, 04:12:48 pm ---The bookcase will be on the wall in the computer room suspended by the rods going through the ceiling and into the attic - this is a 3D image of what it will look like.

--- End quote ---

Oops -- hold on. All the time I was assuming that you were planning for long rods which go all the way down to the bottom of the shelf, through each of the shelf boards, providing direct support for each board. The way you show it, the top board of the shelf (or its frame, if you want to call it that) will have to carry the full weight, and it will see a significant bending force, not just a push/pull.

What material and dimensions are you planning for that top baord? (Sorry if you already wrote about this and I didn't pick it up; my "rods threaded through all the shelves" mental picture might have been in the way.)

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