On Feb 9, 10:12*am, Swingman wrote:
On 2/9/2013 8:57 AM, Greg Guarino wrote:

K. Was 16" "standard" before there was sheetrock? (and yes, I'm aware
that even if it was, I might not find that spacing) The house was
built in 1939,

Depends ... 16" OC, for a 2x4 studs in platform framed is "standard" in
most codes dating far back; 24"OC is "standard" for 2x6 studs.

If the house is two story, and has balloon framing, which is not
uncommon in houses of that vintage, you may find it closer to the latter
(24").

It's two stories, but is actually brick, attached on both sides.

I can tell you one thing ... you will not be happy with ANY stud finder
you can buy at a BORG. End of Story

OK. I doubted that a stud finder would work well in this type of wall
anyway.

If you have to get destructive to anchor that thing for your Dad's
safety, which is of paramount importance, Leon's suggestion about using
a trim board behind the hand rail is excellent advice.

Yup. That is the most important factor, but my Mom will prefer that it
look nice too.