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They used washers to keep the nails from slipping through - key to realizing it needed something much more substantial to hold it was the 3/8's + hole in the mineralac. The must have been a PITA to hammer..... I would have opted for 90 degree 3/8 rod hangers, to strut and may have doubled up supports for each 10' - Easier to hang on top of the strut that way.

Even tough it may be a moot point because the trusses aren't made to carry them anyway, by laying the conduits on top the load would be spread out evenly on all of them instead of straining the heck out of one of them every 10 feet.

WOW! That is a lot of support and I bet it looks great.

On the other hand if you want to get a little closer to what is really needed and still sleep well the Power Strut site has some great information on engineering supports.

Power Strut

[This message has been edited by iwire (edited 08-11-2006).]

Luckily those feeders didn't fault or you would be facing something like THIS

Or since they were feeders the OCP would've tripped first.

Either way, very lucky no one was hurt.

Iwire: (Bob)

Yes, I thought it looked nice. A lot of layout. I'll see if I have any pics.

'Uni-strut' on this job. 'Power Strut' is carried by another supply house, but he did not seem to interested in this job. Used to have a third 'Kindorf', but that kind of went away. Other supply house had some 'bargain' stuff; no country of origin, no name; 7/8" (thin) could deflect really easy

John

PS: Thanks for the compliment