75 KVA tranformer suspended from parking garage ceiling
- Thread starter MBLES
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Most garage floors are precast and have hollow sections so make sure you hit the solid section. I also like the epoxy better than the drop ins but drop ins work.
I just looked and those are rated for hollow core and solid.
I just looked and those are rated for hollow core and solid.
- Location
- New Jersey
- Occupation
- Journeyman Electrician
We hang 75 kva transformers all of the time, personally I would use 1/2" anchors and rod.
Cow
Senior Member
- Location
- Eastern Oregon
- Occupation
- Electrician
As long as all the components are rated for the load, I wouldn't think twice about it.
dmxtothemax
Senior Member
- Location
- Brisbane, Queensland, Australia
Personally I would be getting advise from an engineer,
Especially if it is in a public area !
Legal liability being what it is !
Especially if it is in a public area !
Legal liability being what it is !
- Location
- Massachusetts
I would use 1/2" as well, not sure I would do it at all without direct instruction.
junkhound
Senior Member
- Location
- Renton, WA
- Occupation
- EE, power electronics specialty
What seismic zone are you in ?
Ragin Cajun
Senior Member
- Location
- Upstate S.C.
Yeah he should probably get a rigging crew to do the actual setting of the transformer too, in fact why not just give it all away and sub out the terminating to a separate contractor as well. Can't be too safe
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junkhound
Senior Member
- Location
- Renton, WA
- Occupation
- EE, power electronics specialty
Seriously, 3/8 all-thread is pushing it, ham fisted installer can overtorque and partially shear 3/8", even 1/2".
Plus, if this is not new construction, you are at the mercy of how good the concrete is, esp if bare concrete and not above steel pan.
I'd be very comfortable with 1/2" hiliti thru steel pan into concrete with grade 5 bolts, but definetly not 3/8 all thread into bare concrete
- have seen too many anchors pull out or crater poor concrete - and, have twisted off too many low grade 3/8" bolts and threaded rod to have any comfort in the installation factor - even if you use a torque wrench.
I'd use 1/2" and drill thru the deck if no steel pan. You DO have a bosch bulldog or similar with 18" bits, don't you? :huh:
Plus, if this is not new construction, you are at the mercy of how good the concrete is, esp if bare concrete and not above steel pan.
I'd be very comfortable with 1/2" hiliti thru steel pan into concrete with grade 5 bolts, but definetly not 3/8 all thread into bare concrete
- have seen too many anchors pull out or crater poor concrete - and, have twisted off too many low grade 3/8" bolts and threaded rod to have any comfort in the installation factor - even if you use a torque wrench.
I'd use 1/2" and drill thru the deck if no steel pan. You DO have a bosch bulldog or similar with 18" bits, don't you? :huh:
we did consult engineer and he said 3/8' w 1 9/16 embedded. we already hung the transformer and i feel pretty confident about now. i just wanted to hear you guys opinion. the engineer was very confident the garage would hold the XFMR. i did had 1 extra all thread to each side for my peace of mind.
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