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dav1965
Advanced Member

USA
10914 Posts

Posted - 02/13/2018 :  09:47:37 AM  Show Profile  Reply with Quote
I am building a small shop 20' x 20' and i was wondering about the floor.

I have a lot of tool boxes and i am going to have toolboxes along 1 whole wall and half of another wall.

I am going to have a wood floor because my land is so sloped i would have to get someone to do a lot of leveling.

I was thinking about taking 2x8x16 boards and putting the floor joist every 4" for 50 inches to support the toolboxes.

Or just have them on 16 inch centers and laying 2x8 boards on top of the 3/4 inch plywood and putting the toolboxes on top of the boards.

Which of the 2 are better? Or do you have a better idea.

Alpine
Advanced Member

11990 Posts

Posted - 02/13/2018 :  10:00:24 AM  Show Profile  Reply with Quote
Perimeter of foundation build up of masonry blocks. Pour cells full of grout. Back fill, and compact to 95% and pour a concrete floor.




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Bubba Jr.
Advanced Member

USA
5487 Posts

Posted - 02/13/2018 :  10:03:23 AM  Show Profile  Reply with Quote
I would do as you suggest except put the plywood on top of the 2x8's. That way when you drop the little bits on the floor you can pick them up rather than trying to dig them out of the cracks. You'll have the same load capacity either way.
Good luck
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select-fire
Advanced Member

55302 Posts

Posted - 02/13/2018 :  10:15:52 AM  Show Profile  Reply with Quote
quote:
Originally posted by Bubba Jr.

I would do as you suggest except put the treated plywood plywood on top of the 2x8's. That way when you drop the little bits on the floor you can pick them up rather than trying to dig them out of the cracks. You'll have the same load capacity either way.
Good luck

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Mr. Perfect
Advanced Member

50200 Posts

Posted - 02/13/2018 :  1:23:10 PM  Show Profile  Reply with Quote
I would use 2x10 floor joists and place them every 12"

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Edited by - Mr. Perfect on 02/13/2018 1:23:29 PM
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Brookwood
Advanced Member

USA
3544 Posts

Posted - 02/13/2018 :  1:36:48 PM  Show Profile  Reply with Quote
Really depends upon what use your shop will be put to.

A lot of welding or heat treating, soldering, etc., I'd go concrete.
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JimmyJack
Advanced Member

USA
2811 Posts

Posted - 02/13/2018 :  3:52:24 PM  Show Profile  Reply with Quote
Overkill unless your boxes are full of lead.Are the boxes on wheels? Is the weight of the box spread out over the base? What is the weight of a box?
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droptop
Advanced Member

USA
5638 Posts

Posted - 02/13/2018 :  3:54:56 PM  Show Profile  Reply with Quote
quote:
Originally posted by Alpine

Perimeter of foundation build up of masonry blocks. Pour cells full of grout. Back fill, and compact to 95% and pour a concrete floor.




Best idea so far.
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asop
Advanced Member

4936 Posts

Posted - 02/13/2018 :  6:35:00 PM  Show Profile  Reply with Quote
I half used "pre-fabed" wood joist for heavy loads with long spans. 12" O.C. will hold quite a load. If your concentrated loads are a concern just cut and screw plywood sections between the upper and lower 2 X pieces on the top and bottom of the joist.
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montanajoe
Moderator

Trinidad and Tobago
46479 Posts

Posted - 02/13/2018 :  11:36:59 PM  Show Profile  Reply with Quote
concrete floor.
painted battle ship grey with a little sand in it


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HandLoad
Advanced Member

15216 Posts

Posted - 02/14/2018 :  01:18:08 AM  Show Profile  Reply with Quote
Long, Long ago, and Far, Far away, when I was able to wangle entree to a "Money no Object" machine shop of the U.S. Gummint, they had a Shop floor of End-Grain Oiled Oak. "Mike Lab", China Lake, CaCaLand.

Even Longer time ago, and Yet Farther away, U.S. Merchant Marine Academy, LonngIsland, New York, Same sort of Floor.

Laudate Nomen!
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remingtonoaks
Advanced Member

USA
15214 Posts

Posted - 02/14/2018 :  04:06:13 AM  Show Profile  Reply with Quote
quote:
Originally posted by Alpine

Perimeter of foundation build up of masonry blocks. Pour cells full of grout. Back fill, and compact to 95% and pour a concrete floor.







As Mason I concur. But put vertical 5/8 rebar every 32in and 2} 5/8 horizontal rebar every course (8"). with 5/8 rebar 2'-1" ea. leg (which is 40x the diameter) bent at a 90¡ã coming out at every vertical rebar into the floor. Then you would have something.... Unless you don't care how long it lasts.
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