Years ago a saw a "shtender" (it's a small portable "riser" commonly used to prop the prayer book up while praying in shul. It has other uses, also.) that is constructed by sliding a piece of wood into two grooves built into each of the two sides of a larger piece of wood.

To get some sense of what this looks like, begin with this idea, lower right picture on the page. However, instead of a hinge connecting the top and the bottom, imagine that the top part, where the book rests, has 2 narrow strips of wood on its underside. the box part (bottom of the stand) has two grooves on the top of the box. To construct the shtender, you slide the top piece into the groves of the bottom piece. Similar, in a sense to some wooden crates that have a slide-on lid.

Can this shtender be made on Shabbat? Is this a problem of the prohibition of "boneh" - (construction / building)?

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    Can you include some pictures or diagrams to help us understand the mechanics here? – Double AA Jan 26 '17 at 20:57
  • @DoubleAA Wish I could find a diagram. This was something I had seen a while ago. I don't know how common this is, now. I'll try to describe this verbally in better detail, B"N. – DanF Jan 26 '17 at 20:59
  • similar to this? goo.gl/images/s6lcOc – kouty Jan 26 '17 at 21:17
  • sounds to me like it's more "normal use" than building. – Daniel Jan 26 '17 at 21:22
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