Workshop - What to put in floor?

[vtjon]

I realize this is a relatively common question. I have a somewhat unique situation where I am building a shop with a basement. My concrete basement walls have been poured and we will be installing the beams and metal decking tomorrow for the upper slab. I need to figure out what rough-ins I need. I previously asked the "how" before and now I am looking for the what. It can all be a little overwhelming to decide.

A bit of background - the shop is 28x40. The upper slab will be sitting on 8" thick concrete walls and my beams are every 69". My main floor will be 2x4 typically framed. Each beam has several 10" holes to pass through utilities. I plan to initially have an air compressor, dust collector and electrical in the basement.

Despite the size, this will be a woodworking/hobby shop and upstairs will be all one open space for now. There will be a drain in the front near the door though cars will not commonly be parked there. I will have a table saw (220V/20A), a bandsaw (220V), jointer, miter saw station, among other things. I have not done a complete a layout as I'm not exactly sure what all I will have. I will have dedicated 200A service that will come in the right-side wall about 6 feet off the corner.

I was going to do the beams and decking myself but the contractor who is doing some other work for me offered to do it. They, of course, have more experience doing this type of thing than me. I am thinking the following:

• Table saw receptacle (how?) approximately 15ft from back wall (in between beams #2 and #3)
• Table saw dust collection (how?) near receptacle
• Separate 120V outlet on/near table saw outlet (how?)
• 6" PVC threaded (screw-in flat cap) sleeves in each corner
• 6" PVC threaded (screw-in flat cap) sleeve in the middle of each side wall
• 3 pieces of 2 1/2" PVC Sleeves under my electrical box

One complicating factor is my main floor walls sit on top my 8" basement walls. My sleeves will be about 4.5" from the edge of my finished wall. I want a clean installation of everything and I want to avoid having to core drilling later which I realize is likely impossible. It is my intention to run a 4" PVC pipe through my 6" sleeve along the side walls to distribute dust collection to the tools on the side walls.

Questions

• How do we rough-in for my table saw pieces (outlet, dust collection, 120V)? A flush mount setup would be ideal but they seem expensive and probably unnecessary. My dust collection will eventually be 4in PVC
• Should I offset my table saw pieces to one side a little bit instead of center?
• My air compressor line will come up through the back-right corner. If I bring something up through my 6" PVC, I guess I could box around it and run it into the wall/ Would I need to fill that empty space in the 6" PVC?
• Are my PVC sleeves under my electrical box enough or too much?

 

[pmiranda]

My opinion is that I’d put separate 4” pvc for the dust collector and 2” for electrical at each place you want them. Stuffing electrical around the 4” dust collector pipe would be awkward and probably not even up to code.

 

[FANTM58]

Have you considered drainage from the shop, trench or wash basin ?

 

[Jackfre]

I would definitely move the table saw to a wall. I have a 52' Saw stop in my shop and I don't cut whole sheet goods on it. I use a Festool track saw for that. I just have to have fore and aft space for long rips. it also makes the power supply to the saw easier as you can have a wall outlet with a shorter cord to it. You can't put a flat outlet into the floor. it is a fire hazard. You would need a conduit through the floor and a box on it with the outlet. Open area in the center is invaluable. Locating equipment in the center locks that space down. My shop is a woodworking shop, but also a welding shop, equipment maintenance, etc. You are very fortunate to have a basement. With that mistakes, which you will likely make, as wants and needs change, can be rectified quite simply. Once the walls are up and the roof is on you can begin moving gear in and seeing how the space flows for you. Take your time!!! Put your dust collector in the basement and run a 6" main across the ceiling. Oh, and get enough dust collector. I made the mistake of deciding I needed only a 1.5 hp rolling unit and I connect one machine at a time, so I have the 4" flex hose laying across the floor. I should have put a 3hp unit up in the attic trusses (I'm on a slab) with a couple drops. At his point however I will not spend the dough to make the change.

 

[vtjon]

Thanks folks. I realize that the basement does make it easier to fix anything. I hoped that due to the shop being so deep, it wouldn't cause too many issues if the receptacle and dust outlet in the back 1/3rd in the floor. I am planning to put it on a pedestal for now.

I am putting a drain in the front. I think I am going to rough in a drain line for a wash basin and tie it my floor drain. It's drained to daylight which is allowed here. I don't have water in the shop as it wasn't worth it. I thought I could have a camping-type sink.

I've thought about the trench. I don't know if it's suitable for me.

I'm going to put the decking down this weekend. I'll give it a bit more thought after I see it with the decking.

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