Thanks for the help. Feedback from two of the great
tall cities in the world is certainly useful (even if
it is negative!).  We're combing the local regs for
loopholes, although not optimistic, and I'll let you
know if we have any success.

One thought is to fix vertical rails (such as
unistruts) to the facade (fixings through the windows)
to provide continuous lateral restraint to the swing
stages.  Problem is how you accommodate the changes in
plane of the building facade (projecting courses etc).

Our other hope is to combine such an approach with a
netting / hoarding below which is downgraded in total
capacity to accommodate localised impact loads, but
not an overall 5 or 10 kPa uniformly distributed load.
 This would significantly reduce the size of
structural members required to cantilever it off the
building.

Thanks for the feedback.

david west

 --- "Score, Robert" <[log in to unmask]> wrote:
> Same story here in Chicago. We have tried in the
> past to present to the city
> a means of accomdating sidewalk protection with
> modified enclosures around
> swing stage, but to no sucsess, the sidewalk
> protection is always required.
>

> From: Hammarberg, Eric
> Subject: Re: enclosed swinging scaffolds
>
> It sounds like we in New York City have similar
> requirements. Here, swing
> stage can be used for access but not for protection
> of the sidewalk below.
> We must provide a temporary bridge, rated at either
> 150 or 300 pounds per
> square foot. We can also provide netting below and
> within 3 stories of the
> work (I forget the load requirements but assume they
> are about 150 psf.)
>
> There is no way to realistically accommodate these
> requirements with swing
> stage plus by its nature, swing stage is loose even
> if tied into the facade
> it can swing around.
>
> Sorry, I can't help
>
> Eric Hammarberg


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