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Re: railing design

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Roger T., the bottom of the rail is the stair stringer.  it is a tube member. the
stair is a concrete filled metal pan system.

Roger Turk wrote:

> Mark,
> I am having a rough time visualizing your railing.  The railings that I am
> familiar with have the vertical members attached to horizontal members at the
> top *and* bottom.  I don't think that I have ever seen a railing system where
> all the verticals extend to the walking surface.  Usually there is a space
> (4" max) between the walking surface and bottom horizontal member which acts
> as a toe space, drainage area, and to prevent debris accumulation.  Posts
> connected to the walking surface would usually be 8 - 10 feet apart.  Perhaps
> your architect has a particular architectural statement to make that I can't
> contemplate at this time.
> A. Roger Turk, P.E.(Structural)
> Tucson, Arizona
> Mark Trimble wrote:
> . > i have a handrail that has 1/2" X 1/2" verticals at 4" o.c. with a
> . > nominal flat stock top horizontal.  in applying the code required 200 #
> . > horizontal load what effective width is allowed.  another words how many
> . > verticals can contribute?
> . >
> . > another question is, what is the codefied deflection criteria?
> . >
> . >