fp23
Structural
- Aug 2, 2024
- 24
I originally made a post about a glass railing here. I'm designing a glass railing for a custom stair that will be supported by round standoffs and will have a custom 3/4"x2" handrailing above the glass. I have a few follow up questions.
-For those of you who design these railings in Risa, do you model the actual holes in the glass? The resources I've found show risa models with point supports where the standoffs would go. I've looked at engineering data from FHC and CRL, they both have some engineering calcs but don't have any testing data or a clear allowable load at the standoffs for the glass. So i'm wondering if I need to model the holes in Risa or search for better testing data to compare reactions to.
-It's looking like I have a custom railing connection that I'm going to have to design. Any advice on design guides or how to start this? I'm having trouble finding resources for this. I'm thinking of using plate steel welded to the railing and filled with a silicone adhesive. The NSCEA guide is a little vague on this but suggests assuming a uniform stress distribution over the area for a silicone adhesive. So I think my next steps are to do some research on what type of adhesive to use. (see snip below)
-When I model this in Risa as a single 3/4" pane I get some pretty high deflections (2 1/4"). With a top rail connection the glass at the corners deflection is much better at .8". So it seems like i need to count on the top rail to share the load between panels. Have others come to similar conclusions? (see snip below)
-For those of you who design these railings in Risa, do you model the actual holes in the glass? The resources I've found show risa models with point supports where the standoffs would go. I've looked at engineering data from FHC and CRL, they both have some engineering calcs but don't have any testing data or a clear allowable load at the standoffs for the glass. So i'm wondering if I need to model the holes in Risa or search for better testing data to compare reactions to.
-It's looking like I have a custom railing connection that I'm going to have to design. Any advice on design guides or how to start this? I'm having trouble finding resources for this. I'm thinking of using plate steel welded to the railing and filled with a silicone adhesive. The NSCEA guide is a little vague on this but suggests assuming a uniform stress distribution over the area for a silicone adhesive. So I think my next steps are to do some research on what type of adhesive to use. (see snip below)
-When I model this in Risa as a single 3/4" pane I get some pretty high deflections (2 1/4"). With a top rail connection the glass at the corners deflection is much better at .8". So it seems like i need to count on the top rail to share the load between panels. Have others come to similar conclusions? (see snip below)