Lighting

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Alwayslearningelec

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I see most vendors want run lengths when you have 4' & 8' foot lengths tandem mounted not just counts per 4' & 8'. Do you experience this? Also how do you labor linear runs of 4' & 8' that many of these tandem mounted? Per fixture or per foot? I guess ieven though it was say a 40' run but had (5) 8' fixtures tandem mounted you would put one 8' fixture up at a time? Or would they be assembled on the ground? But the run can be so long making it impossible to install???? THanks
 
horsegoer said:
I see most vendors want run lengths when you have 4' & 8' foot lengths tandem mounted not just counts per 4' & 8'. Do you experience this? Also how do you labor linear runs of 4' & 8' that many of these tandem mounted? Per fixture or per foot? I guess ieven though it was say a 40' run but had (5) 8' fixtures tandem mounted you would put one 8' fixture up at a time? Or would they be assembled on the ground? But the run can be so long making it impossible to install???? THanks
Click to expand...

The vendor needs the run length so you get the right fixtures. If you have a 40 ft. run the vendor would send you 3 "run" fixtures which do not have finished ends and are made to butt up to another fixture. Your first and last fixture on the run have 1 finished end with the other end butting up to another fixture. I hope this makes sense. I have always put the lights up one at a time with the help of another guy. I always use aircraft cable to hang linear light like you are describing. On a run of 5 lights you would need 6 cable drops to hang the lights.
 
stevebea said:
The vendor needs the run length so you get the right fixtures. If you have a 40 ft. run the vendor would send you 3 "run" fixtures which do not have finished ends and are made to butt up to another fixture. Your first and last fixture on the run have 1 finished end with the other end butting up to another fixture. I hope this makes sense. I have always put the lights up one at a time with the help of another guy. I always use aircraft cable to hang linear light like you are describing. On a run of 5 lights you would need 6 cable drops to hang the lights.
Click to expand...

I agree with stevebea, however what he is descirbing is linear architectual direct/indirect fixture which is already wired with matching male/female connector at each end.
You could also have regular strip fluor fixtures with or without industerial reflector.
Reason mentioning this is in regard to your question."Also how do you labor linear runs of 4' & 8' that many of these tandem mounted? Per fixture or per foot?"

First type or fixture you only needs one feed per row and attachment type per fixture.
Second type of fixture needs one feed per row, then you need add labor for wiring through fixture's channel.

horsegoer
Lighting

I see most vendors want run lengths when you have 4' & 8' foot lengths tandem mounted not just counts per 4' & 8'. Do you experience this? Also how do you labor linear runs of 4' & 8' that many of these tandem mounted? Per fixture or per foot? I guess ieven though it was say a 40' run but had (5) 8' fixtures tandem mounted you would put one 8' fixture up at a time? Or would they be assembled on the ground? But the run can be so long making it impossible to install???? THanks
Click to expand...

These fixtures commonly can be in combination of 2', 4',8', and 12' in the row.
Like 24' row, manufacturer may give you 3-8' or if they want to save money, they could give you 2-12'.
 
stevebea said:
The vendor needs the run length so you get the right fixtures. If you have a 40 ft. run the vendor would send you 3 "run" fixtures which do not have finished ends and are made to butt up to another fixture. Your first and last fixture on the run have 1 finished end with the other end butting up to another fixture. I hope this makes sense. I have always put the lights up one at a time with the help of another guy. I always use aircraft cable to hang linear light like you are describing. On a run of 5 lights you would need 6 cable drops to hang the lights.
Click to expand...

My bad.... I should have read your post twice instead of going off on a tangent! :slaphead: :D
 
horsegoer said:
I guess ieven though it was say a 40' run but had (5) 8' fixtures tandem mounted you would put one 8' fixture up at a time? Or would they be assembled on the ground? But the run can be so long making it impossible to install???? THanks
Click to expand...

Typically you will assemble the entire length on the ground, and then bring in one guy per 3' with scissor lifts to stand there and hold the assembly up (typically called the "holders"), while three to six other guys ("runners") drive lifts alongside, installing anchors to hold up the assembly. Typically, the process takes quite a while, necessitating relief men on a third set of lifts assisting the holders.
 
George Stolz said:
Typically you will assemble the entire length on the ground, and then bring in one guy per 3' with scissor lifts to stand there and hold the assembly up (typically called the "holders"), while three to six other guys ("runners") drive lifts alongside, installing anchors to hold up the assembly. Typically, the process takes quite a while, necessitating relief men on a third set of lifts assisting the holders.
Click to expand...
You could do it that way, or you could do it with one guy in a scissor lift with a 10' platform and an extension ladder laid out across it to support and raise the light assembly, and a second guy in a smaller lift driving alongside tying off.
 
George Stolz said:
Typically you will assemble the entire length on the ground, and then bring in one guy per 3' with scissor lifts to stand there and hold the assembly up (typically called the "holders"), while three to six other guys ("runners") drive lifts alongside, installing anchors to hold up the assembly. Typically, the process takes quite a while, necessitating relief men on a third set of lifts assisting the holders.
Click to expand...
You could do it that way, or you could do it with one guy in a scissor lift with a 10' platform and an extension ladder laid out across it to support and raise the light assembly, and a second guy in a smaller lift driving alongside tying off.
Click to expand...
That's not an OSHA-approved method of supporting the fixture - can you see it's better with three teams on their own lifts?
 
stevebea said:
The vendor needs the run length so you get the right fixtures. If you have a 40 ft. run the vendor would send you 3 "run" fixtures which do not have finished ends and are made to butt up to another fixture. Your first and last fixture on the run have 1 finished end with the other end butting up to another fixture. I hope this makes sense. I have always put the lights up one at a time with the help of another guy. I always use aircraft cable to hang linear light like you are describing. On a run of 5 lights you would need 6 cable drops to hang the lights.
Click to expand...

Well described, thanks
 
Last edited:
maghazadeh said:
I agree with stevebea, however what he is descirbing is linear architectual direct/indirect fixture which is already wired with matching male/female connector at each end.
You could also have regular strip fluor fixtures with or without industerial reflector.
Reason mentioning this is in regard to your question."Also how do you labor linear runs of 4' & 8' that many of these tandem mounted? Per fixture or per foot?"

First type or fixture you only needs one feed per row and attachment type per fixture.
Second type of fixture needs one feed per row, then you need add labor for wiring through fixture's channel.



These fixtures commonly can be in combination of 2', 4',8', and 12' in the row.
Like 24' row, manufacturer may give you 3-8' or if they want to save money, they could give you 2-12'.
Click to expand...

Can you explain what you mean by the two different types of fixtures? I understand the two different wiring methoda but whcih ones get which type of wiring?? THanks.
 
George Stolz said:
Typically you will assemble the entire length on the ground, and then bring in one guy per 3' with scissor lifts to stand there and hold the assembly up (typically called the "holders"), while three to six other guys ("runners") drive lifts alongside, installing anchors to hold up the assembly. Typically, the process takes quite a while, necessitating relief men on a third set of lifts assisting the holders.
Click to expand...

So a 16' run can be installed on the ground? Thanks.
 
ActionDave said:
You could do it that way, or you could do it with one guy in a scissor lift with a 10' platform and an extension ladder laid out across it to support and raise the light assembly, and a second guy in a smaller lift driving alongside tying off.
Click to expand...

What do you mean by the tying off? I understand men tying off when above a certain height, is that what your referring to?
 
horsegoer said:
What do you mean by the tying off? I understand men tying off when above a certain height, is that what your referring to?
Click to expand...

Yes, a lot of times the urgency of the moment gets guys to get up in the lift before they tie off, so sometimes it's necessary to have some of the third team driving alongside with harnesses and lanyards to tie them off while they are in the air.
 
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