How to read data sheet for truss

Dagger said:

How to read this data sheet?

Whats pi. ? Deflection etc? .


Theres is a video wall going up. 45 panels. (28 lbs each ) 3 sticks of truss. (6.5 ' = total span 19.5 ft)

Overall weight of video wall 1260lbs
( + hardware , cable, truss etc)

The guy who does the math uses two 1 ton motors.


My questions:
How do i find out through the data sheet how much the allowable weight is for the center of the truss?

Thanks,

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TimMc said:

Why a point load in the center? That's not how the truss is being used. The video wall attaches in columns (for lack of a better description) so the uniformly distributed load chart applies.

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Dagger said:

Understood.

What i dont understand is the info in the data-
In particular pi. and deflection.

I could also refer to this chart fpe udl?

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Gobokat said:

Tim,
Have you ever used this truss product before and is this actually the truss product you're using?
To simply answer your questions, the "PI" listed is decimal feet - and is shown in multiples of the 4-tile product, deflection is the negative bend at midpoint from horizontal for the max allowable load with 2 points of suspension. So, if you load your truss and start flying and the horizontal is deflected more than this amount at midpoint stop immediately and unload the truss or get more motors or bridle it differently. Also - if your truss is loaded to the max expect this much "belly" in the middle of your truss and adjust (trim) your center hanging points to your panels accordingly.

Now - since this product is specially engineered to hang video panels you're given the "LBS/Hook" which is their recommended max loading per engineered hanging point within this truss structure.

If you have not used this product before I would strongly recommend that you call the vendor you're hiring it from or the rep/distributor and talk to them directly about how this product integrates into your rig.

and if you're unsure about anything stop, it's OK, and consult (i.e. hire) your closest ETCP rigger.

Click to expand...

TimMc said:

I'm not the person with the questions, I'm trying to suss out which product is actually being used before making any comment about the suitability for the proposed load and as-yet revealed means of suspension.

Click to expand...

Gobokat said:

Tim,
Have you ever used this truss product before and is this actually the truss product you're using?
To simply answer your questions, the "PI" listed is decimal feet - and is shown in multiples of the 4-tile product, deflection is the negative bend at midpoint from horizontal for the max allowable load with 2 points of suspension. So, if you load your truss and start flying and the horizontal is deflected more than this amount at midpoint stop immediately and unload the truss or get more motors or bridle it differently. Also - if your truss is loaded to the max expect this much "belly" in the middle of your truss and adjust (trim) your center hanging points to your panels accordingly.

Now - since this product is specially engineered to hang video panels you're given the "LBS/Hook" which is their recommended max loading per engineered hanging point within this truss structure.

If you have not used this product before I would strongly recommend that you call the vendor you're hiring it from or the rep/distributor and talk to them directly about how this product integrates into your rig.

and if you're unsure about anything stop, it's OK, and consult (i.e. hire) your closest ETCP rigger.

Click to expand...