[SML] pipe grid question

[Bryan Manternach]

Depends on the clamps you select.  Rose Brand sells clamps at a Working 
Load Limit of 1100 LBS .  Shop around for heavier limit clamps for your 
grid design if that is an option.

-Bryan Manternach, CTS

On 10/9/17 8:56 AM, Richard John Archer via Stagecraft wrote:
> University engineers are looking at the pipe grids in our spaces (not yet in the proscenium)  .   Seems like an odd time after 30 years in the building ….but…
>
> Grids are all  kind of typical looking …..two way #40  1 1/2” pipe grid ,  cross grid connectors (so one direction of pipe below the other direction) ,  a bit over 4’ x 4’ spacing….beam clamps with 1/2” threaded rod seemingly  spaced appropriately  The problem is with the  pipe clamps….most appear to be JP Clancy   half pipe clamps (or other manufacturer? Clancy did Proscenium rigging).  Half pipe clamps only have a 200 # RWL  .  Why would anyone install these in a grid?  ….they just adequately  hold up the pipe weight.    Am I missing something here?    Was this some Cornell value engineering at it’s finest?  I’m sure original theatre consultants wouldn’t have spec’ed this (ARTEC)
>
> Needless to say, we’ve been hanging  up to maybe 200 fixtures in there for years.  Biggest flexible space is about 50 x 50.
>
>
>
> DickA
> TD, Cornell U
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-- 
Bryan Manternach, CTS
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