take off for emt project

[GSXR600]

Ok! i Have a fairly large all emt project how are you guys taking off as far as lights and recepticles go are you guys averaging or taking it all off because i dont see a way to come up with an honest average

 

[celtic]

Take it all off.

For some areas, you can average....classrooms, offices etc..."cookie cutter" type locations.
For some items you can also average out...phone drops etc.

For feeders and MWBC runs....gotta do the math to be accurate.

 

[G & G Electric]

First, you would visualize how the conduit is going to put in by looking at the prints. Then scale off the prints to know exactly how long the runs are going to be. It depends on the job, but I usually get by with adding 20 feet for each plug and switch (sometime 15' for a switch). Are you going to use whips or flex to the fixtures, or hard pipe? If you use whips, just scale the conduit for these from the prints as well. And don't go over 6 feet on your whips. Just don't forget to add your 4 square boxes in. If it's hard pipe to the fixture, then you should take into account the height of the deck, and the height of the ceiling, and find the differnce and take it from there. And add 15to 20% for scrap. There are so many different scenarios to your question. Every one who replies will probably have a different method. Come back with a little more info.

 

[jmsbrush]

As Celtic said" Take it off". Scale the print. That will get you very close on how much material you will need, then use your labor units and go from there.

 

[masterinbama]

I do everything by assemblies. A receptacle includes 10' of conduit ,1 connector,1 coupling ,1 4" box, 1 box bracket,1 mud ring,1 receptacle and i cover plate. Same for switches. Then branch circuits and feeder conduits. so on and so on. I have a spread sheet I designed years ago that plugs all of these in for me. Higher ceilings I will adjust. I can get really close with this. I did a office building last year my take off said I needed 21,000' of 1/2 inch EMT I had to buy 200' extra, but then again that might have been used staking out walls for the slab rough.

 

[walkerj]

As everyone else stated prints must be scaled for branch circuits.
I will usually count all receptacles and use masterinbama's method of assemblies for each outlet.
Same for data, box, mud ring, 10' conduit, two connectors.
Wire is added in with each branch circuit. three circuits is five wires x length of run. three wires x 15' for each outlet.
For light whips, its easy: 6' per light

 

[celtic]

Running your EMT on larger racks in central "trunks" may show as more pipe to run, but then consider supporting all those individual runs ....saves money

 

[GSXR600]

yes thats what i am doing i grabbed an assemblie and gave each rec 12f feet which will be good enough to get to the next device or to the ceiling then iam taking off the branch from the wall to the wall above the device