Wall units - real quick question.

How thick should my walls be, should I float my floors (and if so, how), why is two leaf mass-air-mass design important, etc.

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gavinchan
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Joined: Thu Sep 04, 2003 5:58 pm
Location: Melbourne, Australia
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Wall units - real quick question.

Post by gavinchan »

Here's an easy one for you, are the measurments on the Wall Units page H X W X D or W X H X D? :oops:

Many thanks for your patience....
knightfly
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Location: West Coast, USA

Post by knightfly »

Which ones? From what I see, height of the units is usually specified as "whatever", depending on ceiling height - as for things like insulation batts, they come in whatever size they come in - usually 2' x 4', sometimes larger.

From my limited travels, England (and apparently Australia) normally put the larger of two dimensions first, where us dumb yanks go the other way - I was in England for several months before I (sort of) got used to people talking about a 10 x 8 photograph, or a 4x2 board...

If you can be more specific about which unit (and application) you're looking at, I'll see what I can offer... Steve
gavinchan
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Joined: Thu Sep 04, 2003 5:58 pm
Location: Melbourne, Australia
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Post by gavinchan »

Sorry the John Sayers Wall Units page:

http://www.johnlsayers.com/HR/index1.htm

Or more specifically :

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knightfly
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Posts: 6976
Joined: Sun Mar 16, 2003 11:11 am
Location: West Coast, USA

Post by knightfly »

The upper half of that drawing is a top view, looking down (as the unit would be placed when in use) - the back is 6mm plywood, which typically comes in 1200 x 2400mm sheets - since most ceilings are just 2400mm tall, John has shown it cut down enough to be movable in a normal ceiling height. So each unit would be 1200mm wide, and 2100 mm tall.

Rigid fiberglass insulation comes in 600 x 1200mm batts, so the insulation would need to be cut for that size unit - you would use one full sheet placed vertically, then cut a second one to fit the remaing space.

If you use MDF for the sides as shown, I would recommend using cleats where the plywood and MDF meet, for more surface area. Glue and screw construction to keep rattles from happening.

The lower half of the pic is a partial front view -

The deeper sections of these units are placed toward the front of the room, the end where your speakers are placed - that way, any reflections off the slats will get re-directed behind you, so that they don't muddy up speaker imaging. This is shown by the dotted lines in the overall plan, shown at the bottom of the page you linked.

I hope that helped - if I'm still not understanding what you need, c'mon back... Steve
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