[BBQ]

I did. http://www.access-board.gov/adaag/html/figures/fig5a.html

48" to centerline.

Where are you finding centerline?

The switches handle cannot exceed 48" which it will if you make 48" the center of the box.

 

[BBQ]

Quit trying to key in the fact when on the handle is above 48" by 1/4" or something like that. That is NOT the intent, nor is it the way it is written.

It is the intent and it is the way it is written.

 

[BBQ]

Here ya go BBQ. This is a book published by Taunton Press, recognised country wide as it contains both the UBC, IBC, ADA, NEFPA, SMACNA, and PIPE.
Most building inspectors are issued this $40, 200 page loose leaf binder.Most of my colleagues call it "Inspection for dummies."
IF you do your own remodeling, or do a lot of residential, I promise you this is a great book to have.

As hard is it is to believe the government actually made something stupid simple, here it is. Nobody carries around a micrometer. It's very easy to do.

You are really making this hard, wildleg quoted 'The law' you seem to be trying to quote someones opinion, I can't tell becuse it is too small to see.

See if you can follow this.

The ADA rules were not written specifically for wall switches, they were written for any item a handicapped person might have to interact with. A doorknob, a wall oven, a switch etc.

That being the case measurements to 'the center-line' would be, and are meaningless.

The measurement is to the uppermost part that the person has to touch. So a switch mounted at 48" to center is in fact too high even if by just .75"

Now same applies to receptacles, 15" is the minimum height to the bottom, not the center-line. If you put a duplex at 15" to center the bottom receptacle is below the required minimum height.

I am sorry this logic escapes you but it really seems to be passing you by.

 

[BBQ]

Centerline heights are big with electrical engineers on the legend page of plans . ?

Of course they are.

But we are not talking about electrical engineers, we are talking about an ADA requirement that applies to a metric-buttload of different things, not just simple wall switches.:jester:

Picture a wall mounted oven that had to comply with the ADA, if you make it 48" to center at least 12" to 15" of it would be out of reach.

 

[BBQ]

My point was , who the hell sets the height of a box by its center ?

I do almost always. That way if you use different types of boxes on the same job the devices always end up the same.

 

[BBQ]

For a nail up box you are limited to top or bottom for your marks.

Maybe you are but not me, I am that good. :jester: