Replies

1. 
   Huck | Aug 09, 2009 07:43pm | #1

   could this be what you're talking about? (always helps when you use explanatory pics to accompany your post)

   http://www.housingzone.com/project-showvillageLP/article/CA495314.html?preview=TRUE&cache=FALSE

   View Image bakersfieldremodel.com
1. 
   ckorto | Aug 09, 2009 07:48pm | #2

   That's not it specifically but could be something like that.  Sorry I don't have any pictures.  I just don't know how to download them.  Like I said, I'm just bored and trying to find out what they're for, no real reason.

   Chuck

   Huck BTW- saw you were from Bakersfield.  Had a buddy when we were in the Marines, lived in Oildale.  Use to go tubing down the "Killer Kern River"  always a good time in Bakersfield, thanks for the reply.

   Edited 8/9/2009 12:51 pm ET by ckorto

2. 
   jimAKAblue | Aug 09, 2009 08:10pm | #3

   I don't know what "slots" you are talking about but they might be water relief holes. Water ponding on top of the ply has to go somewhere or it will soak in.

3. 
   BilljustBill | Aug 09, 2009 10:35pm | #4

   As the material swells, getting the tongue-and-groove edges to pull together can be a problem.  The inset slots are for clamps to pull the pieces together. 

   I've seen the slots in the actual SturdiFloor plywood brand, but in some of the box stores, it's been hit and miss with their floor decking.. 

1. 
   JTC1 | Aug 10, 2009 02:58am | #6

   >>.....SturdiFloor plywood brand.....<<

   Sturd-I-Floor is not a brand, it is a service rating --- like "Rated Sheathing", or, Select Structural, #1, #2, #3 in framing lumber.

   "Unifloor" and "Sturd-I-Floor" are equal ratings applied by different testing labs / standards groups.

   JimNever underestimate the value of a sharp pencil or good light.

2. 
   Matt | Aug 10, 2009 03:18am | #7

   >> As the material swells, getting the tongue-and-groove edges to pull together can be a problem.  The inset slots are for clamps to pull the pieces together.  <<

   Got a Mfg web page showing that?  Also, the mating edges of the ply or OSB are not supposed to be real tight.  It inhibits expansion.  Several brands are self spacing.  If you have trouble getting the T&G to go together just lay down a 2x4 along the grove edge and tap the piece into place with a sledge.  It also helps to have at least 2 people.  One to wield the sledge and one or 2 to work the T into the groove, mainly by just standing on the sheet right near the edge that is to be mated.

1. 
   ckorto | Aug 10, 2009 03:51am | #8

   Actually, these 2 slots are on the 4' side of the osb and do not go all the way through as to allow drainage.  I really can't figure out what they're for.  I'll try and post some pictures.  Like I said this isn't important, just want to figure out what they're for.

    

   Chuck

   Edited 8/9/2009 8:51 pm ET by ckorto

1. 
   Framer | Aug 10, 2009 04:12am | #9

   Ask the guy at the lumberyard in the morning.

    Joe Carola

1. 
   Huck | Aug 10, 2009 04:20am | #10

   He'll say, "go on internet, I'm sure you'll find it there"!!  =)View Image bakersfieldremodel.com

2. 
   ckorto | Aug 10, 2009 04:51am | #12

   No,these are Home Depot osb sheets.  I didn't even use them for a floor.  Just wanted some 3/4" material to fill in some old roof louver(sp?) holes because we were puting in a ridge vent.  As they were laying on the saw horses, I wondered what those slots were for.  I have to find this out tommorow, it's driving me nuts!

   Chuck

3. 
   bennyd342 | Aug 10, 2009 04:55am | #13

   it allows for drainage when the sheets are butted together over a joist

   water falls into the 1/8" gap left between the sheets and rolls along the joist till it drops in the slot

4. 
   ckorto | Aug 10, 2009 05:03am | #14

   I PL every joist when nailing down subflooring, how would it drain through a glued joist?

   Chuck

5. 
   bennyd342 | Aug 10, 2009 05:13am | #15

   guess that would depend on how you glue it

    

    

    

2. 
   Matt | Aug 10, 2009 04:49am | #11

   Haven't seen that.  What brand is it?

3. 
   mackzully | Aug 10, 2009 05:00pm | #16

   I know exactly what you're talking about. I thought they were for plywood clips, but I've only ever heard of plywood clips, I've never actually seen a clip. Z

4. 
   JTC1 | Aug 10, 2009 01:27am | #5

   GP Top Notch has a series of slots / missing tongue sections on the tongue edge and a few slots cut into the square (4') ends.

   As near as I can tell, the slots lets the tongues engage a little easier and.....

   more importantly provide a drain for rainwater during construction.

   Jim

    

   Never underestimate the value of a sharp pencil or good light.