Racks clearance

Anyone knows the requirements for the racks clearance in the server room?  Or recommended clearance off the walls.

I read front should be 36" and rear 24"  Now, what about the sides of the racks?  Contractor is about to install one of my racks with its side flashed to the wall.  I believe it would be uncomfortable to mount equipment with one side right next to the wall.  Screw rails in, cable mgmt, power, etc.
What are the requirements or suggestions.  Thanks in advance.
LVL 17
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

If you look at the racks in a datacentre or co-lo they are all bolted together in a row, a private datacentre may have nothing between the individual rack units but a co-lo has a sheet of steel in between each rack. Any mounting of hardware, cabling etc has to be done from back or front, there's no side access whatsoever. It's certainly easier to take the side panel off a rack sometimes but it shouldn't be necessary so butted up against the wall is OK.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Tiras25Author Commented:
Not rear to the wall but one of the side flashed to the wall. Bolted to the wall.
is it OK?
Yes it is OK although I wouldn't expect it to be bolted to the wall, just flush with it. Full size racks are never rear to the wall, you couldn't wire the kit up.

36 inches is a bit short for the front access though (unless you can slide the rack backwards on castors) as some servers are almost that long and you have to mount them via the front.  24 inches is overkill for the rear assuming your rack has split rear doors
Angular Fundamentals

Learn the fundamentals of Angular 2, a JavaScript framework for developing dynamic single page applications.

Tiras25Author Commented:
Just open-frame racks.  No doors and no side-walls.

So you think its OK to have a side flashed to the wall.   I was thinking is a bit uncomfortable.  For example to screw rails, drill has some thickness, or even using a manual screwdriver would be uncomfortable next to the wall. no?
May be a bit uncomfortable but how often do you take a server out of a rack or put one in?

BTW, I think you mean flush, not flash.
Tiras25Author Commented:
Got it.  Thanks Andy.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Server Hardware

From novice to tech pro — start learning today.