[SML] Loading Bridge design...

[Will Leonard]

Howdy,

We are doing an install on a building that was built in 1976 & I need some
information from the experts on the List:

 With this project, we are having to work with an Architectural Firm who
has no theater experience. We are having to explain to them how things are
actually work/are used, which is not a problem because this is very common
as we deal with remodels, etc.

However, they are trying to tell us that the loading bridge is only
designed for a Live Load of 20psf. This means that 1- we cannot build a
scaffolding to reinforce the head steel (as they are requiring) but also
that 2- the bridge cannot have the stage weights stacked on it as it was (&
has been since the building first opened).

What I am looking for is if someone can quote (or direct me to where I can
find) documentation that the building codes of the 1970s required Live Load
ratings (150 psf? like the stage floor). I don't want the client to not be
able to use their newly installed counterweight system because of incorrect
information, so I reach out to the group to see if I am crazy.

Let me know what you think (dangerous request I know) ;)
- Will Leonard
Design Manager
C: 281-752-1060
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