Riser Height Calculator - Page 6 - AVS Forum
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post #151 of 165 Old 04-07-2014, 08:36 PM
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Absolutely subscribing to this thread. Can't wait to run the calc when I finally know my room dimensions.
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post #152 of 165 Old 04-11-2014, 01:56 AM
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Yikes, according to my calculations, my riser has to be 18.5". I REALLY wanted three rows, but 3' of riser in a basement with a height of 85" isn't going to work frown.gif

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post #153 of 165 Old 05-25-2014, 03:56 PM
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In the variable plug ins, what is R defined as?

As in: R*D2=V2
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post #154 of 165 Old 06-04-2014, 09:37 AM
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All, I am trying to figure out what height my riser needs to be and I am kinda flying blind here. I know the following variables.

I plan on using a Benq W1070 for my PJ and I have mounting flexibility to place it between 11-17' from the screen. I know I will have a row of three Berkline Tangiers on a riser at roughly 18', the riser will be 7' long and 10' wide. I know the front row will sit as close to the front of the riser as possible so let's call it 11' for the front row. Based on BIG and other comments and I can verify this tonight at home I think my seated viewing height will be 38" (42" to top of heads seated, account for some sinking into the recliners). I also will have bar seating behind the riser that will not rest on the riser as my riser will simply be a "box" in the middle of the room to elevate the 2nd row seats. The bar will be most likely 42" tall and I'm not worried about folks at the bar having partially obstructed views as much as I am the second row.

I plan on using a 16x9 AT screen that will be 130" WIDE, not diagonal. Any help is appreciated as I need to get this done so I can order my carpet.
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post #155 of 165 Old 06-04-2014, 10:13 AM
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Quote:
Originally Posted by wraunch View Post

All, I am trying to figure out what height my riser needs to be and I am kinda flying blind here. I know the following variables.

I plan on using a Benq W1070 for my PJ and I have mounting flexibility to place it between 11-17' from the screen. I know I will have a row of three Berkline Tangiers on a riser at roughly 18', the riser will be 7' long and 10' wide. I know the front row will sit as close to the front of the riser as possible so let's call it 11' for the front row. Based on BIG and other comments and I can verify this tonight at home I think my seated viewing height will be 38" (42" to top of heads seated, account for some sinking into the recliners). I also will have bar seating behind the riser that will not rest on the riser as my riser will simply be a "box" in the middle of the room to elevate the 2nd row seats. The bar will be most likely 42" tall and I'm not worried about folks at the bar having partially obstructed views as much as I am the second row.

I plan on using a 16x9 AT screen that will be 130" WIDE, not diagonal. Any help is appreciated as I need to get this done so I can order my carpet.


There is a riser calculator somewhere on here, but couldn't find it off hand.  One other input is the "height of of bottom of screen", and this I believe is the screen itself (not the black velvet surround material).  The higher the bottom of the screen, the lower the riser and lower the bottom of the screen, the higher the riser. 

 

A 130" wide makes for an ~ 73" image height, so, depending on your ceiling height and whether you are using a stage, that could make for a higher riser!   A question out of curiosity, will you use the 130" wide for 16:9 reasons... or, use 130: wide for 2.35:1 and then when viewing 16:9 material, be able to use more 'height' on the screen.

 

I am leaning towards a 130" wide, 2.35:1, but don't like that it makes the 16:9 max image smaller, I was thinking of doing a DIY that could make the screen 'taller' so, I could have a larger 16:9 image, but maybe an easier way is just ordering the 130" wide 16:9, of course, causing larger bars on top/bottom of the 2.35 image at 130" wide.

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post #156 of 165 Old 06-04-2014, 10:41 AM
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Quote:
Originally Posted by kmhvball View Post
 


There is a riser calculator somewhere on here, but couldn't find it off hand.

 

It is a sticky at the top of the forum. Which happens to be this very thread we are posting in ...


It appears my hypocrisy knows no bounds.

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post #157 of 165 Old 06-04-2014, 10:46 AM
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Yeah I know about the calculator website. I will check it tonight. I am beginning to think I will have to shrink to a 120" wide 16:9 screen or go 2:35 in order to avoid a 20" tall riser.
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post #158 of 165 Old 06-04-2014, 12:00 PM
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Quote:
Originally Posted by kmhvball View Post


There is a riser calculator somewhere on here, but couldn't find it off hand.  One other input is the "height of of bottom of screen", and this I believe is the screen itself (not the black velvet surround material).  The higher the bottom of the screen, the lower the riser and lower the bottom of the screen, the higher the riser. 

A 130" wide makes for an ~ 73" image height, so, depending on your ceiling height and weather you are using a stage, that could make for a higher riser!   A question out of curiosity, will you use the 130" wide for 16:9 reasons... or, use 130: wide for 2.35:1 and then when viewing 16:9 material, be able to use more 'height' on the screen.

I am leaning towards a 130" wide, 2.35:1, but don't like that it makes the 16:9 max image smaller, I was thinking of doing a DIY that could make the screen 'taller' so, I could have a larger 16:9 image, but maybe an easier way is just ordering the 130" wide 16:9, of course, causing larger bars on top/bottom of the 2.35 image at 130" wide.

I am going to play around with the riser calculator at home, can't access it now. When I used BenQ's throw calculator it says the screen will be about 20" from the floor. I am going to do a DIY 16:9 screen that will be about 73" tall. I did the calculation using the Carlton Bale v3.3 calculator and it tells me I need a 19" riser. That seems a bit crazy.
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post #159 of 165 Old 06-04-2014, 01:46 PM
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In the variable plug ins, what is R defined as?

As in: R*D2=V2

R is the only variable not defined above.
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post #160 of 165 Old 06-04-2014, 02:20 PM
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V1/D1=R
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post #161 of 165 Old 07-24-2014, 10:11 AM
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my only question is around the projector in how that factors into the riser height. At some point my riser raises my head into the picture.

I really wish I could figure out a cheap and dirty way to build a temporary riser so I could play with different heights. I suppose a stack of drywall with a sheet of plywood on top would probably do the trick. But that's not necessarily cheap or easy to deal with.
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post #162 of 165 Old 09-22-2014, 12:55 PM
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Does this calculator assume an upright position as opposed to a reclined one?

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post #163 of 165 Old 09-22-2014, 02:09 PM
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Quote:
Originally Posted by ChldsPlay View Post
Does this calculator assume an upright position as opposed to a reclined one?
I don't know with any certainty, but my assumption has always been it assumes a 'similar recline' between the two rows. So, if both rows are fully reclined or both rows are fully upright, I would think line-of-site would be similar.

I would guess if your 2nd row was fully upright, and the front row fully reclined - the riser height would need to be less. However, my hope is at minimum, the calculator determines a riser height that doesn't require the front row to be reclined.

So, a next question could be can the 2nd row be reclined and front row be up-right' and does the calculator cover for that?? That would be 'best case'..
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post #164 of 165 Old 09-22-2014, 02:22 PM
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Quote:
Originally Posted by kmhvball View Post
I don't know with any certainty, but my assumption has always been it assumes a 'similar recline' between the two rows. So, if both rows are fully reclined or both rows are fully upright, I would think line-of-site would be similar.

I would guess if your 2nd row was fully upright, and the front row fully reclined - the riser height would need to be less. However, my hope is at minimum, the calculator determines a riser height that doesn't require the front row to be reclined.

So, a next question could be can the 2nd row be reclined and front row be up-right' and does the calculator cover for that?? That would be 'best case'..
That would be best case, but in those instances, I would think the riser heights would get to be fairly extreme in some cases. I found that if the seats in both rows are reclined, the calculated riser height needed is much less than if they are both upright.

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post #165 of 165 Old 11-04-2014, 12:00 PM
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Originally Posted by Ryked View Post
Just wanted to say thanks for the riser formula. Worked like a charm.<br><br>
Here are some pictures of the riser.<br><br><img alt="" src="http://i98.photobucket.com/albums/l264/Ryked/HT%20-%20Platform/DSCF5678.jpg" style="border:0px solid;"><img alt="" src="http://i98.photobucket.com/albums/l264/Ryked/HT%20-%20Platform/DSCF5679.jpg" style="border:0px solid;"><br><br><img alt="" src="http://i98.photobucket.com/albums/l264/Ryked/HT%20-%20Platform/DSCF5681.jpg" style="border:0px solid;"><img alt="" src="http://i98.photobucket.com/albums/l264/Ryked/HT%20-%20Platform/DSCF5682.jpg" style="border:0px solid;"><br><br><img alt="" src="http://i98.photobucket.com/albums/l264/Ryked/HT%20-%20Platform/DSCF5685.jpg" style="border:0px solid;">
just now starting my HT project. I would love to know the depth of your risers (looks like 5 or 6 ft. on the picture. Also, whats your screen size and distance to the head position from the screen?

Greatly appreciate the info.
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