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How much does a cast-iron plate weigh? #1686579
05/29/11 02:17 PM
05/29/11 02:17 PM
Joined: Aug 2009
Posts: 164
Phoenix, AZ
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Chloe J. Scott Offline OP
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Chloe J. Scott  Offline OP
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Phoenix, AZ
Question: What would be the ballpark figure of the weight of the cast iron plate from an old American 5-ft grand? The overall dimensions are about 54" wide by about 48" or so front-to-back. I'm thinking about 300 lbs.

Thanks,
James

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Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1686610
05/29/11 03:29 PM
05/29/11 03:29 PM
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Loren D Offline
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I think you're about right.


DiGiorgi Piano Service
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Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1686615
05/29/11 03:38 PM
05/29/11 03:38 PM
Joined: Jun 2006
Posts: 1,404
Québec, Canada
accordeur Offline
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Québec, Canada
I'm just guessing. A baby grand weighs around 600 pounds depending on the brands. So i think the plate would be more like 350 or 375 pounds.


Jean Poulin

Musician, Tuner and Technician

www.actionpiano.ca
Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1686679
05/29/11 05:55 PM
05/29/11 05:55 PM
Joined: Jun 2003
Posts: 27,100
Oakland
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BDB Offline
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Very few small grands weigh as much as 600 pounds. A Steinway M is under 600 pounds. My 5' 4" Mason and Hamlin is under 500 pounds.


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Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1686684
05/29/11 06:07 PM
05/29/11 06:07 PM
Joined: Jun 2006
Posts: 1,404
Québec, Canada
accordeur Offline
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I stand corrected BDB.

It would be interesting to know the ratio of the plate weight/structure. Half the weight of the piano? More? Newer pianos have much heavier cabinets due to the MDF they use.

Steinways are typically lighter than most pianos I believe?


Jean Poulin

Musician, Tuner and Technician

www.actionpiano.ca
Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1686689
05/29/11 06:19 PM
05/29/11 06:19 PM
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Loren D Offline
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I'm guessing, but I bet the plate accounts for around 70% of the weight, at least.


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Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1686690
05/29/11 06:29 PM
05/29/11 06:29 PM
Joined: Jun 2006
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Québec, Canada
accordeur Offline
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Well, I've moved many pianos over the years, with and without the plate in them. 70% would be the limit I guess again?


Jean Poulin

Musician, Tuner and Technician

www.actionpiano.ca
Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1686740
05/29/11 09:11 PM
05/29/11 09:11 PM
Joined: Aug 2009
Posts: 164
Phoenix, AZ
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Chloe J. Scott Offline OP
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Chloe J. Scott  Offline OP
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Phoenix, AZ
I know that the M&H BB is almost 1100 pounds, but it has a full perimeter plate. I don't think that the B does though, just the regular shape.

Thanks all for your imput. This gives me an idea of what I will be dealing with.

Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1686837
05/30/11 01:25 AM
05/30/11 01:25 AM
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Oakland
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My 5' 4" Mason & Hamlin is a T, not a B. Bs probably have heavier plates.


Semipro Tech
Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1687038
05/30/11 10:42 AM
05/30/11 10:42 AM
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Posts: 164
Phoenix, AZ
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Chloe J. Scott Offline OP
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Chloe J. Scott  Offline OP
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Really? I've never heard of that one. How is it different from the B?

Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1687086
05/30/11 12:07 PM
05/30/11 12:07 PM
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Montreal
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pyropaul Offline
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My 1887 Steinway A weighs 675lb - not sure how much of that is the plate though.

Paul.

Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1687223
05/30/11 04:54 PM
05/30/11 04:54 PM
Joined: Sep 2003
Posts: 5,531
Olympia, Washington
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Del Offline
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Originally Posted by James Scott
Question: What would be the ballpark figure of the weight of the cast iron plate from an old American 5-ft grand? The overall dimensions are about 54" wide by about 48" or so front-to-back. I'm thinking about 300 lbs.

Closer to about half that.

There is considerable variation in how much iron various manufacturers threw at their pianos—some were/are considerably lighter or heavier than others. For a 5-ft grand I’d guess the weight of their plates would range from a little under 150 lbs for a well-designed, light-weight model up to, maybe, 250 lbs for a thick, crudely-designed, “full-perimeter" model. Most of them are probably in the 150 – 200 lb range.

ddf

Last edited by Del; 05/30/11 04:57 PM.

Delwin D Fandrich
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Stupidity is a rare condition, ignorance is a common choice. --Anon
Re: How much does a cast-iron plate weigh? [Re: Chloe J. Scott] #1687389
05/30/11 09:43 PM
05/30/11 09:43 PM
Joined: Dec 2005
Posts: 421
Stoneham, MA
woodfab Offline
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I just put up a winch with a track and trolley so I weighed a few plates I have in the shop. to make sure it would safe.

A Baldwin 1911 5'6" plate 218 lbs
A kranich & Bach 1912 5'3" plate 212 lbs
A Kimball 4'8" plate 195 lbs

Thats without the pin block and tuning pins.

Dan

Last edited by woodfab; 05/30/11 09:48 PM.

Dan (Piano Tinkerer)

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