Re: Side booms rigging

On Jan 29, 9:20 am, Rob <r...@[EMAIL PROTECTED]
> wrote:
> I'm working with a friend at a new facility. The architects want to
> install: "18' lighting pipes referred to as "pipe booms"...They are to
> be attached to the floor using a threaded flange and tied of using a
> heavy duty rope to a location above the stage"
>
> My concern and the concern of the lighting install company is:
> "...that the pipe is too long and has too much load for the specified
> flange attachment (5" floor flange). We recommend a larger floor base
> which will offer better stability for a pipe of that length and
> eliminate the chance of causing damage to the floor and also the
> possibility of a more rigid attachment point for the top of the pipe
> in addition to the rope tie off."
>
> The architects claim this is a 50 year old practice used in other
> sites. I think it sounds suspect-- it would not be my choice. Any
> comments?

Rob,

You could refer to the standard for this, which is an ANSI/ESTA
standard, ANSI E1.15 - 2006.  It was written by Richard Nix who's an
occasional poster to this group.  That should be the standard
reference.  Fifty years means that it is a technique developed before
NIOSH could slap you around properly for industrial accidents.  Better
to look at modern practice.

In the interests of full disclosure, I did a little editing on the
do***ent.

Thomas Paterson
http://www.luxpopuli.com