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Forum topic by Lumberpunk posted 03-02-2017 03:44 PM 406 views 0 times favorited 10 replies Add to Favorites Watch
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Lumberpunk

334 posts in 2121 days


03-02-2017 03:44 PM

Hi All, I am doing a glass topped display case coffee table for a client and am looking for some advice on mounting the glass for the top.

The top opens, probably on a piano hinge, I was going to rabbet the glass in to the top and seat it with strips of walnut but I’ve never worked with big glass like this before (60”x32”x1/2”) and I figure it’s going to be heavy so I’m looking for any ideas that might work better.

Thanks!

Luke

-- If someone tells you you have enough tools and don't need any more, stop talking to them, you don't need that kind of negativity in your life.


10 replies so far

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Kazooman

843 posts in 1737 days


#1 posted 03-02-2017 03:53 PM

I googled “plate glass weight” and found a free online calculator to estimate the weight. It came up with 90 pounds.

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Lumberpunk

334 posts in 2121 days


#2 posted 03-02-2017 03:57 PM



I googled “plate glass weight” and found a free online calculator to estimate the weight. It came up with 90 pounds.

- Kazooman

Thanks Kazooman, I knew it would be heavy, I’m more curious on people’s ideas on fixing it in the frame.

-- If someone tells you you have enough tools and don't need any more, stop talking to them, you don't need that kind of negativity in your life.

View llewel's profile

llewel

14 posts in 236 days


#3 posted 03-02-2017 04:13 PM

I’ve worked with a lot of glass installers and what seems to be constant in their technique is the use of clear silicone as a bedding agent to keep the glass from moving around. Then you could hold it in place with walnut. I am assuming you are making this of tempered glass for safety reasons.

-- Llewel, Texas

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Lumberpunk

334 posts in 2121 days


#4 posted 03-02-2017 04:58 PM



I ve worked with a lot of glass installers and what seems to be constant in their technique is the use of clear silicone as a bedding agent to keep the glass from moving around. Then you could hold it in place with walnut. I am assuming you are making this of tempered glass for safety reasons.

- llewel

Thanks Llewel I guess I was on the right track. Yes tempered.

-- If someone tells you you have enough tools and don't need any more, stop talking to them, you don't need that kind of negativity in your life.

View jbay's profile

jbay

1741 posts in 683 days


#5 posted 03-02-2017 05:45 PM

Why does it have to be 1/2”?
If it’s tempered and all the edges are concealed you shouldn’t have any problems.
3/8” max. Save some money, and some weight

-- If anyone would like to see my Portfolio, PM me and I would be glad to send you the link.

View RobS888's profile

RobS888

2285 posts in 1629 days


#6 posted 03-02-2017 05:56 PM

According to this site, and using your measurements: 1/2 inch of tempered glass would hold 373lbs, 3/8 would hold 160lbs.
https://www.dullesglassandmirror.com/glass-weight-load-calculator

-- I always suspected many gun nuts were afraid of something, just never thought popcorn was on the list.

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JBrow

1242 posts in 704 days


#7 posted 03-03-2017 01:20 AM

Lumberpunk,

Trying to lift a table top weighing almost 100 pounds would be quite a chore. If the glass top were opened a little too much and then let go, it could be heavy enough to rip free the piano hinge. It is difficult to tell from the sketch, but it appears the top overhangs the top supporting frame by very little if at all. This could result in fingers being pinched as the heavy top is closed. But with a glass top that is hinged and lifted, I would think some stays to retain the glass would be required. But the stays would have to be proud of the surface of the glass resulting in a top that is not flush across its entire surface.

I presume the purpose of the glass top is to offer a display area below for some collectibles. If so, then perhaps a slide out shelf onto which the collectibles are placed could lead to a fixed top design. This fixed top design would avoid the problems associated with muscling a hinged top open and could result in a top that is flush across its width. The glass top could just set in the rabbets around the perimeter of the glass top frame.

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jbay

1741 posts in 683 days


#8 posted 03-26-2017 06:56 PM

So what did you end up doing?

-- If anyone would like to see my Portfolio, PM me and I would be glad to send you the link.

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Lumberpunk

334 posts in 2121 days


#9 posted 03-27-2017 12:09 AM



So what did you end up doing?

- jbay

I am still waiting on the glass… benefits of living in the boonies. I’ve ordered 3/8” tempered it will be seated in a deep rabbet in the maple on a 1/2” lip with butyl rubber glaziers tape with walnut strips nailed in to hold it in place. I routered finger holds into the lid which will be connected with a piano hinge with upgraded screws and I am going to use gas shocks to assist the lift and hold the lid in place. Maybe a retaining chain as well but hoping to avoid that. Total weight is going to be around 70lbs. It probably won’t be opened very often.

-- If someone tells you you have enough tools and don't need any more, stop talking to them, you don't need that kind of negativity in your life.

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jbay

1741 posts in 683 days


#10 posted 03-27-2017 12:11 AM

Thanks for the update.

-- If anyone would like to see my Portfolio, PM me and I would be glad to send you the link.

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